Single-mode frequency-agile 9-11 um CO2 laser local oscillator

Richard S. Eng; James F. Cunningham; Yu-Lin Wang; Victor H. Hasson

doi:10.1117/12.271573

4 April 1997 Single-mode frequency-agile 9-11 um CO₂ laser local oscillator

Richard S. Eng, James F. Cunningham, Yu-Lin Wang, Victor H. Hasson

Proceedings Volume 2987, Gas and Chemical Lasers and Applications II; (1997) https://doi.org/10.1117/12.271573
Event: Photonics West '97, 1997, San Jose, CA, United States

Abstract

A cw carbon-dioxide laser capable of being switched at a 30- Hz rate to different laser lines in the 9 - 11 micrometer spectral region has been developed as a single mode local oscillator for high-detection-sensitivity coherent lidar applications. Over sixty ¹²C¹⁶O₂ laser lines (fifty lines for a ¹³C¹⁶O₂ laser) with output power varying from 0.5 W to 5 W were obtained using a compact galvanometer controlled scanning mirror/fixed grating configuration; with a specially designed galvanometer-input voltage waveform digitially controlled through a 16-bit D/A converter, the laser frequency fluctuation was found using a heterodyne technique to have settled to about 0.3 MHz peak-to-peak in 25 ms following each line switching, which is adequate for our coherent lidar atmospheric sensing applications.

Citation Download Citation

Richard S. Eng, James F. Cunningham, Yu-Lin Wang, and Victor H. Hasson "Single-mode frequency-agile 9-11 um CO₂ laser local oscillator", Proc. SPIE 2987, Gas and Chemical Lasers and Applications II, (4 April 1997); https://doi.org/10.1117/12.271573

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