Compound-Cavity Lasers For Medium Range Lidar Applications

D. A. Cohen; Z. M. Chuang; E. M. Strzelecki; L. A. Coldren; K. Y. Liou; C. A. Burrus

doi:10.1117/12.976377

22 June 1989 Compound-Cavity Lasers For Medium Range Lidar Applications

D. A. Cohen, Z. M. Chuang, E. M. Strzelecki, L. A. Coldren, K. Y. Liou, C. A. Burrus

Proceedings Volume 1043, Laser Diode Technology and Applications; (1989) https://doi.org/10.1117/12.976377
Event: OE/LASE '89, 1989, Los Angeles, CA, United States

Abstract

Coupled-cavity tunable-single-frequency diode lasers are used in conjunction with an electronically tunable external cavity to increase the range of a coherent lidar system. Three-terminal DFB lasers and cleaved-coupled-cavity lasers are used which allow continuous wavelength tuning over a range greater than 2A by direct modulation of the injection current. This tuning range results in a distance resolution of less than a centimeter, without signal averaging or other enhancement techniques. By using an electrooptic waveguide phase modulator in the external cavity we have maintained a narrowed laser linewidth while simultaneously tuning the solitary laser. We have achieved a coherence length of 50 meters, a tuning range of 40 GHz, and a simultaneous tuning range-coherence length product of 750 GHz-m.

Citation Download Citation

D. A. Cohen, Z. M. Chuang, E. M. Strzelecki, L. A. Coldren, K. Y. Liou, and C. A. Burrus "Compound-Cavity Lasers For Medium Range Lidar Applications", Proc. SPIE 1043, Laser Diode Technology and Applications, (22 June 1989); https://doi.org/10.1117/12.976377

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