We present image transmission using a mid-wave IR (MWIR) optical transceiver based free-space data link under low visibility conditions. The all-solid-state MWIR transceiver primarily consists of a passively Q-switched, short-pulsed Nd:YAG laser pumping a periodically poled lithium niobate (PPLN) based optical parametric oscillator and a Dember effect detector. The MILES (multiple integrated laser engagement system) transceiver generates pulse position waveforms. The optical data link consists of transmitter drive electronics, pulse conditioning electronics and a computer to generate pulses compatible with the 2400-baud rate RS232 receiver. Data formatting and RS232 transmission and reception are achieved using a computer. Data formatting transforms an arbitrary image file format compatible with the basic operation of the pump laser. Images are transmitted at a date rate of 2400 kbits/sec with 16 bits/pixel. Test images consisting of 50x40 pixels and 100x80 pixels are transmitted through free-space filled with light fog up to 120 ft. Besides optical parametric oscillators, the proposed concept can be extended to optical parametric amplifiers, Raman lasers and other nonlinear optical devices to achieve multi-functionality.
Image transmission in mid-IR using a solid state laser pumped optical parametric oscillator
2002
6 Seiten, 6 Quellen
Conference paper
English
ThL5 Fibre-Laser-Pumped Femtosecond PPLN Optical Parametric Oscillator
British Library Conference Proceedings | 2001
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