Efficient generation of 1.54 micrometers optical radiation can play a big role in eye safe detection and communication. Quasi-phase matching has the potential to provide efficient conversion to 1.54 micrometers. Our approach to develop a quasi-phase matched device at 1.54 micrometers is to use photorefractive self-induced waveguides along with alternating ferroelectric domains to phase match. In this approach the waveguide maintains a high intensity ...
We demonstrated for the first time a saturable polarization rotation in Bacteriorhodopsin that acts as an effective optical limiter. Using a multiple pass scheme and cross polarizes we achieved a ninety degree polarization rotation of a probe beam and a corresponding optical density of 10(exp -4).
We have demonstrated that screening spatial solitons in both one and two dimensions are observable using 8 nanosecond, MW optical pulses. The behavior of these high intensity pulsed screening solitons differs significantly from the previously reported low intensity c.w. screening spatial solitons, but are accurately described by their existence curve. These results will now be combined with our recent results on fixing and quasi-phase matching to generate efficient parametric conversion ...
An innovative technique for generating a three dimensional holographic display using strontium barium niobate (SBN) is discussed. The resultant image is a hologram that can be viewed in real time over a wide perspective or field of view (FOV). The holographic image is free from system- induced aberrations and has a uniform, high quality over the entire FOV. The enhanced image quality results from using a phase conjugate read beam ...
We have developed the use of a confocal microscope to charactersize a new real-time holographic technique which is capable of quantitative measurement of residual stress. In particular, the confocal microscope is used to study and evaluate the visual quality of the surface of a test structure to determine defects and flaws in surface of the structure under stress.
During the project we put together and developed a titanium:sapphire mode-locked laser. The output of the laser was characterized as optical pulses between 100 to 200 femtoseconds in duration. The laser was tunable between 900 nanometers and 1000 nanometers. This tuning range is ideal for studies on indium phosphide. The laser could also be operated in the continuous wave mode. In addition to building and characterizing the laser we used ...
The effort described here will concentrate on a dynamic passive device via photorefractive beam fanning. The device operates on the principle of dynamic gratings. In the formation of a dynamic grating the incoming laser radiation produces a modulation in the material index of refraction. The index modulation then acts as a real time phase grating and deflects, or scatters, the incident laser light.
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