A tightly bending loss technique is developed for application in biomedical WDM fiber sensors. In this paper, we present the measurement and comparison of bending sensor in 1.3 micronmeter and 1.55 micronmeter wavelength region, respectively. A two - wavelength measurement setup is built for bending loss testing. Various wrapping method and turns are invested for studying the bending loss for broadband biomedical sensing system. We found that as the bending ...
A new silicon-on-insulator (SOI) waveguide Michelson interferometer with Bragg reflective gratings as a biomedical temperature sensing array head is presented in this paper. The waveguide Bragg reflective gratings work as mirrors for adjusting the transfer function of the Michelson interferometer sensor. We will show the comparison of the temperature sensing accuracies of the fiber Bragg grating and 501 waveguide Michelson interferometers in biomedical applications. The grating length and perturbation period ...
In this paper, we present a new broadband light source covers 1280-l380nm region for application in a wavelength-division multiplexing biomedical fiber-optic Bragg grating spectra reflective sensors. We cascade two optical amplifiers for achieving the 1 00nm broadband light source. The cascaded two optical amplifiers are praseodymium fluoride fiber amplifier (PDFA) and multiple quantum well optical semiconductor amplifier (MQW-SOA), respectively. The optimal driving current of MQW-SOA and the optimal pumping power ...
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