| Compact, High-Power, Low-Cost 295 nm DUV Laser by Harmonic Conversion of High Power VECSELs |
10 MAY 2011 |
9 pages |
| Authors:
Mahmoud Fallahi; ARIZONA UNIV TUCSON OPTICAL SCIENCES CENTER
|
 | We have successfully demonstrated a compact high-power CW DUV source emitting at 295 nm exceeding the targeted objective. The laser is based on frequency-quadrupled optically pumped vertical external cavity surface emitting source. A highly-strained InGaAs/GaAs multi-quantum well semiconductor laser operating at 1178 nm in a single frequency is developed. By intracavity frequency doubling of the laser, multi-watt yellow laser emitting at 589 nm is generated. The single-frequency, intracavity-doubled 589-nm output ... |
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| WHITE-LIGHT SAGNAC INTERFEROMETER FOR SNAPSHOT POLARIMETRIC AND MULTISPECTRAL IMAGING |
15 Mar 2010 |
12 pages |
| Authors:
Michael W Kudenov; Matthew E Jungwirth; Eustace L Dereniak; Grant R Gerhart; ARIZONA UNIV TUCSON OPTICAL SCIENCES CENTER
|
| A common technique, referred to as channeled imaging polarimetry (ClP), enables the snapshot acquisition of the 2- dimensional Stokes parameters of an arbitrary scene or sample. It achieves this by amplitude modulating the Stokes parameters onto various interference-based spatial carrier frequencies. While this technique has utility. it often suffers from low signal-lo-noise ratios, in remote sensing scenarios. due to its requirement of narrow spectral bandwidth illumination 3 nm in the ... |
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| Coherent Atom Optics with Optical Potentials: A Summary of New Phenomena with Bose-Einstein Condensates at the University of Arizona |
08 Oct 2009 |
9 pages |
| Authors:
Brian P Anderson; ARIZONA UNIV TUCSON OPTICAL SCIENCES CENTER
|
| The Bose-Einstein condensation (BEC) laboratory at the University of Arizona has built a program of research that focuses on two areas of BEC physics. First, we developed techniques necessary to experimentally investigate dynamic quasi-condensed states. With our system, we have instituted new directions of experimental BEC physics: studying spontaneous formation of topological defects during the BEC phase transition, and studying transitions to superfluid turbulent states. As phase transitions and turbulence ... |
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| Nonlinear Optical Transmission of Lead Phthalocyanine-Doped Nematic Liquid Crystal Composites for Multiscale Nonlinear Switching From Nanosecond to Continuous Wave |
10-May-2009 |
5 pages |
| Authors:
ChuanXiang Sheng; Robert A Norwood; Jiafu Wang; Jayan Thomas; Diane Steeves; Brian Kimball; N Peyghambarian; ARIZONA UNIV TUCSON OPTICAL SCIENCES CENTER
|
| We have formulated composites of lead (II) tetrakis (4-cumylphenoxy) phthalocyanine (PbTCPc) doped into nematic liquid crystal (LC), 4'-pentyl-4-biphenylcarbonitrile (5-CB), that has received a 90 deg twisted alignment and investigated the nonlinear transmission properties using both pulsed (Nd:YLF 524 nm, 5 ns) and cw (532 nm) lasers. In the nanosecond regime, this compound is a reverse saturable absorber performing similarly to low-concentration solutions of PbTCPc. Under cw conditions, we observe optically ... |
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| Snapshot Imaging Spectropolarimeter for the Long Wavelength Infrared |
Dec 2008 |
8 pages |
| Authors:
Riley Aumiller; Eustace L Dereniak; Robert Sampson; Robert W McMillan; ARIZONA UNIV TUCSON OPTICAL SCIENCES CENTER
|
| An extremely unique imaging system, that is capable of simultaneously recording both the spectral and polarimetric signatures of all the spatial locations/targets in a scene with just a single integration period of a camera, has been built for use in the long wavelength infrared, 8 to 12 microns. The system contains no moving parts and collects all of its data in a single snapshot. This snapshot capability makes it ideally ... |
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| Time-Resolved Studies of Photoinduced Birefringence in Azobenzene Dye-Doped Polymer Films |
01-Oct-2008 |
5 pages |
| Authors:
ChuanXiang Sheng; Brian R Kimball; Diane M Steeves; N Tabirian; Zhiping Zheng; Yinglan Wu; Jayan Thomas; Jiafu Wang; Robert A Norwood; N Peyghambarian; ARIZONA UNIV TUCSON OPTICAL SCIENCES CENTER
|
| We measured transient photoinduced birefringence (delta n) in various azobenzene dye films by pumping with a nanosecond pulse at 532 nm and probing at 633 nm. The switch-on times for the photoinduced birefringence range from nanoseconds to milliseconds and are systematically related with the lowest optical transition energies for those films. Moreover, our results suggest that the transient photoinduced birefringence measurement is a convenient way to determine the relative energies ... |
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| Preflight and Vicarious Calibration of Hyperspectral Imagers |
15 JAN 2007 |
26 pages |
| Authors:
K. J. Thome; S. F. Biggar; ARIZONA UNIV TUCSON OPTICAL SCIENCES CENTER
|
| This report describes the work period during the first year of the project to develop a comprehensive calibration/characterization plan describing methods to evaluate the alignment and focus of the optical elements, image quality based on the MTF of the system, stray light, spectral response, polarization sensitivity, detector-to-detector radiometric calibration in both a relative and absolute sense. In addition to the preflight characterization calibration plan, the work includes discussions of vicarious ... |
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| High Brightness Spectral Beam Combination of High-Power Vertical-External-Cavity Surface-Emitting Lasers |
31 MAY 2006 |
4 pages |
| Authors:
Yushi Kaneda; Li Fan; Ta-Chen Hsu; Nasser Peyghambarian; Mahmoud Fallahi; Armis R. Zakharian; Joerg Hader; Jerome V. Moloney; Wolfgang Stoltz; Koch Stephan; ARIZONA UNIV TUCSON OPTICAL SCIENCES CENTER
|
| High brightness spectral beam combination of two high-power vertical-external-cavity surface-emitting laser (VECSEL) using volume Bragg grating in a photo-thermo-refractive (PTR) glass is demonstrated. High efficiency beam combination in excess of 90% is achieved, providing an efficient method for power scaling of diffraction limited beam. The beam quality of each starting lasers was 1.68 and 1.35, and that of combined beam was 1.9. Scaling opportunities based on the parameters of VECSELs ... |
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| Spectral LADAR Receiver |
11 DEC 2004 |
80 pages |
| Authors:
Brian A. Kinder; Eustace L. Dereniak; ARIZONA UNIV TUCSON OPTICAL SCIENCES CENTER
|
| The Ranging Imaging Spectrometer (RIS) combines hyperspectral and LADAR imaging capabilities in a single system, allowing both ranging and spectral discrimination to be performed. The RIS couples the Scannerless Range Imaging LADAR developed at Sandia National Laboratories with a Computed Tomographic Imaging Spectrometer (CTIS) operating between 600 nm and 900 nm to provide a hyperspectral snapshot-based imaging and ranging spectrometer. The output of the system is four dimensional, (x, y, ... |
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| Nonclassical Matter Wave Sources |
21 OCT 2004 |
15 pages |
| Authors:
Pierre Meystre; Poul Jessen; ARIZONA UNIV TUCSON OPTICAL SCIENCES CENTER
|
| The general goal of our research is the generation, manipulation, and characterization of coherent and nonclassical matter-wave sources. The research has both a theoretical and an experimental component. Theoretical achievements include the use of nonlinear atom optical techniques to generate beams of entangled atoms and squeezed atomic beams from Bose-Einstein condensates, as well as the generation of entangled atom-photon pairs, the extension of the ideas bosonic atom optics to the ... |
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| Stability and Transient Effects in Ultraviolet Filaments |
SEP 2004 |
135 pages |
| Authors:
Thomas A. Niday; ARIZONA UNIV TUCSON OPTICAL SCIENCES CENTER
|
| Short, high intensity laser pulses induce nonlinear optical effects in the atmosphere that have the potential to make them propagate for long distances. Applications for long distance propagation of short pulses include active spectral remote sensing and laser lightning control. Much of the work in this field has been done with infrared pulses; however, it has been proposed that ultraviolet pulses have the advantage that longer pulse lengths can be ... |
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| 3D Semiconductor Nanocavities |
NOV 2003 |
12 pages |
| Authors:
Galina Khitrova; Dennis Deppe; ARIZONA UNIV TUCSON OPTICAL SCIENCES CENTER
|
| Nanocavities with a three-dimensional cavity mode confinement have been fabricated and their properties have been explored experimentally. Exhaustive measurements were made of linear and nonlinear transmission and reflectivity, and photoluminescence using cw and femtosecond lasers. The high quality of the oxide-aperture nanocavities containing a single quantum well resulted in a well resolved normal mode coupling and a record splitting-to- linewidth much larger than previously seen for a 3D photonic structure. ... |
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| Joint Services Optics Program Reasearch in the Optical Sciences |
21 OCT 2003 |
47 pages |
| Authors:
James C. Wyant; ARIZONA UNIV TUCSON OPTICAL SCIENCES CENTER
|
| This report describes research on eight different projects ranging from fundamental quantum optics to optical engineering. Topics discussed include me following: Collisional dark states and matter wave transparency, high power diffraction limited surface emitting flared lasers, qubits and quantum gates with laser trapped atoms, radiatively perfect quantum dot, 3D semiconductor nanocavities, excitonic and biexcitonic nonlinear optical processes in semiconductor quantum wells, blue lasers and near field techniques for ultra high ... |
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| Feasibility Study of a Quantum-Interference Infrared Photon Detector |
24 JUL 2003 |
4 pages |
| Authors:
Rudolf Binder; Nai H. Kwong; ARIZONA UNIV TUCSON OPTICAL SCIENCES CENTER
|
| We performed a theoretical feasibility study of a conceptually new infrared photon detector. The operational principle of the detector is based on a 3-level quantum coherence effect. The study involved 3-level quantum coherence effects with incoherent (thermal) light in semiconductor quantum dots and the optimization of the detected signal. We were mainly concerned with one specific design concept, namely the one based on an interferometric waveguide geometry. The infrared light ... |
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| Nanotechnology Instrumentation |
FEB 2003 |
9 pages |
| Authors:
Hyatt M. Gibbs; Galina Khitrova; ARIZONA UNIV TUCSON OPTICAL SCIENCES CENTER
|
| Various instruments have been purchased and tested that extend existing nanotechnology capabilities and complement existing equipment. The fact that these laboratories have worked for several years on 3D microcavities and micron-size spectroscopic measurements clarified the need for several complementary instruments. The major new thrust made possible by this grant is spectroscopic capability at 1300 nm. A CCD camera system provides very sensitive detection from 800 to 1600 nm. The existing ... |
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| Development of an All Solid-State Raman Image Amplifier |
25 NOV 2002 |
128 pages |
| Authors:
R. C. Powell; L. K. Calmes; J. T. Murray; ARIZONA UNIV TUCSON OPTICAL SCIENCES CENTER
|
| This report describes a new type of eye-safe, range-gated lidar sensing element based on solid-state Raman image amplification (SSRIA) in a solid-state optical crystal. SSRIA can amplify low-level images in the eye-safe infrared at 1.556 pm with gains up to 106 with the addition of only quantum- limited noise. The high gains from SSRlA can compensate for low quantum efficiency detectors and can reduce the need for detector cooling. The ... |
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| Polarization & Diffractive Optics for a Snapshot Imaging Spectropolarimeter |
16 OCT 2002 |
11 pages |
| Authors:
Derek Sabatke; Ann Locke; Christopher Tehow; Eustace Dereniak; John Garcia; ARIZONA UNIV TUCSON OPTICAL SCIENCES CENTER
|
| A snapshot imaging channeled spectropolarimeter is under development. This instrument combines channeled spectropolarimetry and computed tomography imaging spectrometry to enable the capture of spatially and spectrally resolved polarization data with no moving parts. Our goals under this contract were the design and acquisition of two high-order retarders and a computer-generated holographic disperser. These have been accomplished. |
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| Visible Spectrometer Measurements of the PAC III Intercept of Hera at WSMR on 31-Mar-2001 |
30 SEP 2002 |
5 pages |
| Authors:
Eustace L. Dereniak; James D. George Jr.; ARIZONA UNIV TUCSON OPTICAL SCIENCES CENTER
|
| A snapshot imaging spectrometer known as the Computed Tomography Imaging Spectrometer (CTIS), operating at 15 frames per second, measured the PAC III intercept of a Hera at White Sands Missile Range (WSMR) on March 31, 2001. As in computed tomography, the collected data must be processed to produce the spectral images. A technical report describes the collection technique, the reconstruction techniques, and the resulting spectral images. A paper emphasizing the ... |
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| An Optical Parametric Oscillator for Organic Photonic Materials |
AUG 2002 |
2 pages |
| Authors:
Bernard Kippelen; ARIZONA UNIV TUCSON OPTICAL SCIENCES CENTER
|
| This report is to certify that we have acquired a Spectra Physics femtosecond Optical Parametric Oscillator OPAL - 1.5 that delivers pulses at a wavelength that is tunable from 1.35 to 1.6 urn, for the amount of $65,000. The OPAL was installed in November 2001 and has been running properly since then. This acquisition provided us with the femtosecond laser source needed to conduct research on organic photonic materials for ... |
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| Compact Methods for Measuring Stress Birefringence |
2002 |
9 pages |
| Authors:
Nathan A. Hagen; Derek S. Sabatke; James F. Scholl; Peter A. Jansson; Weinong W. Chen; Eustace L. Dereniak; David T. Sass; ARIZONA UNIV TUCSON OPTICAL SCIENCES CENTER
|
| The recent development of channeled spectropolarimetry presents opportunities for spectropolarimetric measurements of dynamic phenomena in a very compact instrument. We present measurements of stress-induced birefringence in a simple plastic by both a reference rotating-compensator spectropolarimeter and a channeled spectropolarimeter. The agreement between the two instruments shows the promise of the channeled technique and provides a proof-of-principle that the method can be used for a very simple conversion of imaging spectrometers ... |
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| In Situ High Sensitivity Brillouin Light Scattering Spectrometer for MBE-Grown Thin Films |
AUG 2001 |
|
| Authors:
Charles M. Falco; David J. Keavney; ARIZONA UNIV TUCSON OPTICAL SCIENCES CENTER
|
 | This instrumentation project involved the purchase of a high- resolution six-pass tandem Fabry Perot interferometer, a 200 nW frequency- doubled Nd:YAG laser, a custom-designed UHV chamber, a cryogenic sample manipulator, and associated vacuum hardware for interfacing this chamber with the MBE system. Therefore, we have completed all of the design, purchasing, and construction of the equipment needed to complete this project and add the BLS capability on our existing AFM/STM ... |
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| (DURIP 01) A Femtosecond Laser Source for the Study and Development of Organic Photonic Materials |
31 MAR 2001 |
2 pages |
| Authors:
Bernard Kippelen; ARIZONA UNIV TUCSON OPTICAL SCIENCES CENTER
|
| This report is to certify the acquisition of a Spectra Physics femtosecond Ti:Sapp laser source comprised of a pump source Millennia XsP that delivers 10W of optical power, and a Tsunami femtosecond laser (Model: 3960X1BB. S/N: 2019) with broadband optics (700 nm-1000 nm) and a birefringent filter to pump an OPAL for the amount ff $154.000. The laser was installed at the end of August of 2000 and has been ... |
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| 97-AASERT Controlling Spontaneous Emission in Semiconductor Microcavities |
24 FEB 2001 |
6 pages |
| Authors:
Galina Khitrova; ARIZONA UNIV TUCSON OPTICAL SCIENCES CENTER
|
| John Prineas was the student supported by this AASERT. In our Progress Reports of July 31, 1998 and June 30, 1999, he described his research on radiatively coupled quantum wells with narrow exciton linewidths (approx. <0. 6 meV) and with periods in the vicinity of half the wavelength of light in the semiconducting material (X012n 830 nm/(2x3.6) 115 nm). 1-8 John won a Dean's Fellowship, so he no longer needed ... |
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| Controlling Spontaneous Emission in Semiconductor Microcavities |
24 FEB 2001 |
6 pages |
| Authors:
Galina Khitrova; ARIZONA UNIV TUCSON OPTICAL SCIENCES CENTER
|
| John Prineas was the student supported by this AASERT. In our Progress Reports of July 31, 1998 and June 30, 1999, he described his research on radiatively coupled quantum wells with narrow excitation linewidths (^<0.6 meV) and with periods in the vicinity of half the wavelength of light in the semiconducting material (X012n 830 nm/(2x3.6) 115 nm) 1-8 John won a Dean's Fellowship, so he no longer needed AASERT support ... |
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| Active Polymer-Glass Waveguide Devices for Ultra-Fast Photonic |
17 JAN 2001 |
7 pages |
| Authors:
Nasser Peyghambarian; David Mathine; ARIZONA UNIV TUCSON OPTICAL SCIENCES CENTER
|
| This program was for the demonstration and development of a new generation of ultra-high bandwidth optoelectronic switching devices based on an unique combination of ultra-low loss ion- exchanged glass integrated optical waveguide devices coated with highly efficient and ultra-high bandwidth electro- optic polymers. This innovative approach combines the complementary strength of inorganic and organic materials and is based on a new material processing technology. |
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| AASERT-97 Development of New Diode Lasers |
16 JAN 2001 |
10 pages |
| Authors:
Nasser Peyghambarian; Axel Schulzgen; ARIZONA UNIV TUCSON OPTICAL SCIENCES CENTER
|
| This research explored new ways for diode laser fabrications. Focused was on the development of efficient organic light emitting materials and the fabrication of laser structures incorporating these materials. Very large optical gain was found due to stimulated emission in semiconducting conjugated polymers. Then we demonstrated that the huge light amplification can be used to build planar and ring lasers of very small sizes. We also investigated the optical properties ... |
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| Novel Nanostructure Fabrication and Their Characterization by STM and AFM |
28 NOV 2000 |
3 pages |
| Authors:
Dror Sarid; ARIZONA UNIV TUCSON OPTICAL SCIENCES CENTER
|
| The enclosed list of 12 publications contain papers on Silicon Carbide, Scanning Probe Microscopy, Fowler-Nordheim Field Emission, and Nanofabrication that were made possible by this grant. |
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| Transient Coherent Effects in Semiconductor Three-State Systems |
25 OCT 2000 |
181 pages |
| Authors:
Michael E. Donovan; ARIZONA UNIV TUCSON OPTICAL SCIENCES CENTER
|
| The coherent response of a semiconductor three-state system to one or two intense light pulses is investigated experimentally on a 100 fs time scale. Three experiments constitute this dissertation: observation of excitonic Rabi oscillations, measurement of two-exciton coupled Stark shifting, and an attempt to observe dark states. Basic concepts of time-resolved ultrafast semiconductor spectroscopy are explained, followed by an analysis of semiconductor two- and three-state ... |
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| Joint Services Optics Program. Research in the Optical Sciences |
14 OCT 2000 |
52 pages |
| Authors:
James C. Wyant; ARIZONA UNIV TUCSON OPTICAL SCIENCES CENTER
|
| This report describes research on eight different projects ranging from fundamental quantum optics to optical engineering. Topics discussed include the following: Study of magnetoexciton femtosecond spectroscopy, semiconductor microcavities, and periodic structures, ion trapping and quantum transport in optical lattices, quantum atom optics, design optimization of circular grating DBR lasers, coherent and incoherent ultrafast nonlinear optical processes in anisotropically strained semiconductor quantum wells, portable MWIR computed tomography imaging spectroscopy, and the ... |
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| Novel Coherent Effects in Semiconductors |
30 SEP 2000 |
9 pages |
| Authors:
Nasser N. Peyghambarian; Rudolf H. Binder; ARIZONA UNIV TUCSON OPTICAL SCIENCES CENTER
|
| We have performed experimental and theoretical investigations of novel coherent effects in semiconductors, including excitonic Rabi oscillations, soliton-like pulse propagation at the exciton resonance, the nonlinear optical skin effect, interaction-induced polarization rotation in uniaxially strained quantum wells, light-induced ultrafast heavy-to-light hole population transfer, and the coherently coupled heavy-hole-light hole Stark effect. We have identified the role of semiconductor-specific aspects and contrasted the investigated effects ... |
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| Reconstruction Algorithms for MWIR Chromotomography |
AUG 2000 |
33 pages |
| Authors:
J. P. Garcia; ARIZONA UNIV TUCSON OPTICAL SCIENCES CENTER
|
| Two methods of chromotomographic reconstruction applicable to the MWIR region of the electromagnetic spectrum were investigated. The first method involved the decomposition of the datacube into principal component space using the center order, broadband image to form and estimate the spatial components. Then this estimate was used to deconvolve an estimate of the spectral components. The second method used an extension of the traditional maximum- likelihood approach to suppress signal-independent ... |
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| Atom Lasers |
14 JUL 2000 |
10 pages |
| Authors:
Pierre Meystre; Poul Jessen; ARIZONA UNIV TUCSON OPTICAL SCIENCES CENTER
|
| The general goal of this research was the generation, manipulation and characterization of coherent and non-classical matter waves, including atom lasers. The research involved both a theoretical and an experimental component. Major achievements from the Meystre group include the theory of a binary- collision atom laser, new proposals in nonlinear atom optics, in particular the optical control of matter waves, matter-wave superradiance and coherent matter- ... |
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| Comparison of Phenomenological Models With a Microscopic Theory of Semiconductor Optical Nonlinearities |
23 JUN 2000 |
4 pages |
| Authors:
I. Rumyantsev; N. H. Kwong; R. Takayama; R. Binder; ARIZONA UNIV TUCSON OPTICAL SCIENCES CENTER
|
| A microscopic theory of the third order coherent semiconductor optical response is used for the investigation of four-wave mixing signals. The theory is based on the dynamics-controlled truncation formalism and evaluated for the case of resonant excitation of heavy-hole excitons. This approach allows for a direct comparison with other theories (microscopic or phenomenological). and yields a detailed understanding of important many-body effects such as excitation-induced dephasing. |
|
| DURIP-97 Sodium Guide Star Raman Laser |
30 APR 2000 |
9 pages |
| Authors:
Richard C. Powell; ARIZONA UNIV TUCSON OPTICAL SCIENCES CENTER
|
| The goal of this project was the acquisition of a critical piece of research equipment. In this case the equipment was a solid state, intracavity Raman laser for sodium guide star applications. During the time of the grant, this was delivered and used for preliminary tests in our laboratory. The technology improvements necessary for a field version of the laser optimized for operation in an astronomical ... |
|
| High Gain Fiber Amplifiers for DWDM and Metro Networks |
18-Apr-2000 |
29 pages |
| Authors:
N Peyghambarian; ARIZONA UNIV TUCSON OPTICAL SCIENCES CENTER
|
| Outline of briefing: motivation, glass and fiber fabrication, spectroscopic characterization, gain performance and conclusion. |
|
| Topics in Unconventional Imagery |
12 APR 2000 |
43 pages |
| Authors:
B. R. Frieden; Sergio Barraza-Felix; ARIZONA UNIV TUCSON OPTICAL SCIENCES CENTER
|
| A new approach for digitally reducing the presence of random atmospheric turbulence in imagery was developed. This image division' method is based upon the use of two short-exposure images as data. These have unknown point spread functions (PSFs) as defined by the random turbulence. The latter are found by dividing the two image spectra (thus image division'), producing a set of linear equations which may ... |
|
| CTIS Demonstration at White Sands Missile Range |
10 APR 2000 |
23 pages |
| Authors:
Eustace L. Dereniak; ARIZONA UNIV TUCSON OPTICAL SCIENCES CENTER
|
| This report reviews the progress on a demonstration of visible and Mid-Wave Infrared (MWIR) imaging spectrometers at a White Sands Missile Range (WSMR) launch. These instruments are non-scanning; high speed imaging spectrometer capable of simultaneously recording spatial and spectral data from a rapidly varying target scene. High-speed spectral imaging was demonstrated by collecting spectral and spatial snapshots of a missile intercept at WSMR. The ... |
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| MWIR Snapshot Imaging Spectrometer: Calibration and Imaging Experiments; Complete Imaging Stokes Polarimeter for The 3 - 5 Micrometer Spectral Band |
MAR 2000 |
16 pages |
| Authors:
C. E. Volin; J. P. Garcia; D. S. Sabatke; E. L. Dereniak; M. R. Descour; ARIZONA UNIV TUCSON OPTICAL SCIENCES CENTER
|
| We report results of experimentation with a new, high-resolution MWIR non-scanning, snapshot imaging spectrometer capable of simultaneously recording spatial and spectral data from a rapidly varying target scene. The instrument is based on computed tomography concepts and operates in a mid-wave infrared band of 3.0 to 5.0 micrometer. High speed spectral imaging was demonstrated by collecting spectro-spatial snapshots of filtered blackbodies, combustion products and targets of opportunity in the lab. ... |
|
| Near-Field Optical Data Storage: Avenues for Improved Performance |
2000 |
9 pages |
| Authors:
Tom D. Milster; ARIZONA UNIV TUCSON OPTICAL SCIENCES CENTER
|
| Because they produce small spot size, near-field techniques are applied to optical data storage systems in order to increase recording density. For data storage, the optical near field is defined in terms of evanescent coupling between the system used to read data and the recording layer. Two practical implementations that use evanescent energy are aperture probes and solid immersion lenses (SILs). In this paper, the basic characteristics of these systems ... |
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| Amplitude and Phase Apodization Caused by Focusing Light Through an Evanescent Gap in SIL Recorders |
2000 |
8 pages |
| Authors:
Joshua S. Jo; Tom D. Milster; J. K. Erwin; ARIZONA UNIV TUCSON OPTICAL SCIENCES CENTER
|
| High numerical aperture(NA) vector diffraction theory is used to analyze a near field optical system using a solid immersion lens (SIL). The amplitude and phase of the transmitted light through the system changes as a function of the air gap height as well as indices of refraction, incident angle, etc. We call these 'amplitude apodization' and 'phase apodization'. The characteristics of those are done using supergaussian form. The effects of ... |
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| Exit Pupil Patterns from Optical Disks |
2000 |
12 pages |
| Authors:
Robert S. Upton; Tom D. Milster; ARIZONA UNIV TUCSON OPTICAL SCIENCES CENTER
|
| The modulation of the irradiance in the exit pupil of an optical data storage scanning system is described by analyzing the behavior of scan-dependent interference fringes. These fringes are grouped into three independent irradiance components. The variation of the exit pupil irradiance pattern as a function of groove depth is discussed. |
|
| Controlling Spontaneous Emission of Semiconductor Microcavities |
30 SEP 1999 |
9 pages |
| Authors:
Galina Khitrova; ARIZONA UNIV TUCSON OPTICAL SCIENCES CENTER
|
| A comprehensive study, culminating in a Reviews of Modern Physics article, was made of semiconductor microcavities exhibiting vacuum-field Rabi splitting, i.e., nonperturbative coupling between the quantum-well exciton absorption resonance and the single optical mode of the cavity. A large number of samples were grown by MBE with various mirror reflectivities and number of quantum wells. Exhaustive measurements were made of linear and nonlinear transmission and reflectively, and photoluminescence using cw ... |
|
| Atomic Lithography: Forcing Epitaxial Growth Using X-Ray Standing Waves |
SEP 1999 |
8 pages |
| Authors:
Charles M. Falco; Gerd M. Fischer; David J. Keavney; ARIZONA UNIV TUCSON OPTICAL SCIENCES CENTER
|
| In a remarkably short time we have made tremendous progress in both the design and construction of a unique "atomic lithography" deposition facility, and in observing effects of an intense x-ray beam on the growth morphology of a thin semiconductor film. Now, with follow-on funding, we believe we are in a position to achieve the ambitious goals of this project. That is, to use a standing x-ray ... |
|
| Ultra-Low Loss Films by Ion-Beam Sputtering for Novel Polymer and Glass Based Optoelectronic Devices |
31 AUG 1999 |
3 pages |
| Authors:
Nasser Peyghambarian; Sergio Mendes; ARIZONA UNIV TUCSON OPTICAL SCIENCES CENTER
|
| The purchased equipment was the Ionfab 300 Plus from Oxford Instruments. The Ionfab Plus Ion Beam System is configured for sputter deposition of high quality dielectric and metal oxide thin films for optical applications and for etching optical surfaces. The equipment has been an important tool in the OSC research and development of nano-structured optoelectronic components. Among them are electro-active waveguides for research in ... |
|
| High-Powered CO2 Laser Interactions with Surfaces and Related Studies |
APR 1999 |
42 pages |
| Authors:
Devon G. Crowe; ARIZONA UNIV TUCSON OPTICAL SCIENCES CENTER
|
| Four Institutes in Russia were supported for the current year. Technical areas include high-temperature electronics with diamond-like carbon materials, laser resonance photoelectron and photoion microscopy, near-field laser microscopy, alteration of the optical properties of materials, atom lithography with laser light, tunable laser diode spectroscopy, remote sensing from space, and UV and X-Ray optics. |
|
| Novel Quantum Dot-Waveguide Devices by the Sol-Gel Method |
24 APR 1998 |
8 pages |
| Authors:
N. Peyghambarian; E. Wright; S. Honkanen; P. Guerreiro; ARIZONA UNIV TUCSON OPTICAL SCIENCES CENTER
|
| Passive CW mode-locking of a Cr:forsterite laser using PbS quantum- dot glass samples as intracavity saturable absorbers was demonstrated. This is believed to be the first application of a quantum-dot system in a practical device. Average output powers of 74 mW, 4.6 ps laser pulses at 110 MHz repetition rate, and a wide tunability range of 1207 to 1307 nm were obtained. The modelocking was made possible by the absorption ... |
|
| Novel Scheme of All-Optical Signal Switching in Semiconductor NLDC: self-Induced Transparency Soliton Switch |
DEC 97 |
3 pages |
| Authors:
Nasser Peyghambarian; Irina Talanina; ARIZONA UNIV TUCSON OPTICAL SCIENCES CENTER
|
| A novel scheme for ultrafast all-optical switching in a semiconductor NLDC has been investigated numerically. The operating characteristics of a model switch have been demonstrated: switching speed 2 Tbit/s, zero device recovery time, switching contract ratio 10/1, low cross-over pulse energy for switching (below 30 pJ). The latency time per switch has been estimated to be 40 ps for the NLDC coupling length 1 mm. The stability analysis has shown ... |
|
| Topics in Unconventional Imagery |
04 NOV 1997 |
4 pages |
| Authors:
B. R. Frieden; David J. Graser; ARIZONA UNIV TUCSON OPTICAL SCIENCES CENTER
|
| Two problems in unconventional imagery, were worked on, (a) an exact solution to the in age turbulence problem (also called the 'blind deconvolution' problem); and (b) closed-form maximum entropy (M.E.) image restoration Progress on (a) was as follows. It was found that by dividing the image spectra of two short-exposure images of an incoherent object viewed through random turbulence, a system of linear equations can be generated. The unknowns of ... |
|
| An Organic Thin Film Laser Diode: A New and Novel Light Source |
SEP 97 |
6 pages |
| Authors:
N. Peyghambarian; S. Mazumdar; N. Armstrong; B. Kippelen; ARIZONA UNIV TUCSON OPTICAL SCIENCES CENTER
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| This ONR program was focusing on the development of an entirely new diode laser, based upon electroluminescent organic thin films. During these three years, important milestones have been reached towards the demonstration of the first organic laser diode: (i) demonstration of electroluminescence from an organic channel waveguide device fabricated on glass and on Si. (ii) optical gain in excess of 10(4)cm1 measured in a pure solid state conjugated polymer. (iii) ... |
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| Joint Services Optics Program Research in the Optical Sciences |
14 AUG 97 |
128 pages |
| Authors:
Richard C. Powell; ARIZONA UNIV TUCSON OPTICAL SCIENCES CENTER
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| This report describes research on eleven different projects ranging from fundamental quantum optics to optical systems engineering. Some of the important results include: The demonstration of a prototype all solid state intracavity Raman laser for sodium guide star generation in adaptive optics; the demonstration of a prototype generalized aspheric interferometer; the development of a real-time electronic holographic moire system for measuring stress of mechanical components; the development of enhanced techniques ... |
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