Pulse Compression Of An FM Chirped CO[sub]2[/sub] Laser

D. M. Henderson; M. J. Halmos; R. L. Duvall III

doi:10.1117/12.963764

12 December 1989 Pulse Compression Of An FM Chirped CO₂ Laser

D. M. Henderson, M. J. Halmos, R. L. Duvall III

Proceedings Volume 1181, 5th Conf on Coherent Laser Radar: Technology and Applications; (1989) https://doi.org/10.1117/12.963764
Event: Fifth Conference on Coherent Laser Radar, 1989, Munich, Germany

Abstract

FM chirp/pulse compression has long been used in conventional radar systems [1]. The main advantages of such a technique are: 1. Efficient use of the average power available at the transmitter. 2. Increased system accuracy, both in range and velocity measurements. 3. Reduction of jamming vulnerability. We have explored the use of this technique for laser radar systems and in this paper describe an electro-optically FM modulated CO2 waveguide with post detection pulse compression by a surface acoustic wave (SAW) com-pression filter. The CO2 laser has been FM chirp modulated by a CdTe intracavity modulator. A frequency deviation of 95 MHz in 2.1 psec was attained in this fashion. Following heterodyne detection, the chirped pulse was compressed to 15 nsec using a SAW compression filter. This corresponded to a compression factor of 130. The suppression of unwanted sidelobes with a weighting filter was also demonstrated.

Citation Download Citation

D. M. Henderson, M. J. Halmos, and R. L. Duvall III "Pulse Compression Of An FM Chirped CO₂ Laser", Proc. SPIE 1181, 5th Conf on Coherent Laser Radar: Technology and Applications, (12 December 1989); https://doi.org/10.1117/12.963764

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