Our approach concerning the development ofhard target returnCO2 DIAL transmitter/receiver systems is two phased: i) through analysis and experiment, develop a fundamental understanding ofthe transmitter/receiver physics specific to DIAL systems and ii) apply these fundamentals in the development of optimal performance DIAL transmitter/receiver systems.We present our progress and results towards these objectives with the following topics addressed: A general overview of the DIAL transmitter/receiver system characterization effort with a focus on transceiver noise processes. The effects of correlated noise on DIAL performance, especially those effecting statistical convergence over long sample structures, is introduced. And, preliminary measurements of a low-noise, "white" receiver prototype are presented. I Detector Signal Ii and [Processing J Amplifier _____________________________ Range Signal Figure 1. Simplified DIAL System Signal Chain. 2 / SPIE Vol. 2702 0-8194-2076-X/96/$6.O0 Downloaded From: http://proceedings.spiedigitallibrary.org/ on 06/21/2016 Terms of Use: http://spiedigitallibrary.org/ss/TermsOfUse.aspx SPIE Vol. 2702 / 3 Downloaded From: http://proceedings.spiedigitallibrary.org/ on 06/21/2016 Terms of Use: http://spiedigitallibrary.org/ss/TermsOfUse.aspx
We have developed a 64 element linear array of pyroelectric elements fully integrated on silicon wafers with MOS readout devices. The ferroelectric polymer film sensor deposited and polarized on the extended gate of the MOSFET results in a hybrid circuit, the pyroelectric-oxide-semiconductor field effect transistor (POSFET)The fabrication of the wafers included the design of the various masks required to produce the layers which made up. the transistor array: stopper layer, active layer, poly-silicon layer, contacts layer, and bottom electrode layer. A thin film of the ferroelectric copolymer P(VDF/TrFE) was spin coated onto the wafer. Patterned gold electrodes were sputtered as the top electrode layer. The ferroelectric copolymer was hysteresis poled in situ. Tests performed included the array's response to a C02 laser operating in the CW and single pulse modes at 10.6 pm We will present details of the design, processing, and testing of the fabricated devices.
An array of polyvinylidene fluoride, pyroelectric detectors with various selective absorber coatings was included in the Evaluation of Oxygen Interaction with Materials (EOIM-3) experiment which flew aboard the shuttle Atlantis in August, 1992.
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