1.5-μm high average power laser amplifier using an Er,Yb:glass planar waveguide for coherent Doppler LIDAR

Takeshi Sakimura; Yojiro Watanabe; Toshiyuki Ando; Shumpei Kameyama; Kimio Asaka; Hisamichi Tanaka; Takayuki Yanagisawa; Yoshihito Hirano; Hamaki Inokuchi

doi:10.1117/12.976293

19 November 2012 1.5-μm high-average power laser amplifier using a Er,Yb:glass planar waveguide for coherent Doppler lidar

Takeshi Sakimura, Yojiro Watanabe, Toshiyuki Ando, Shumpei Kameyama, Kimio Asaka, Hisamichi Tanaka, Takayuki Yanagisawa, Yoshihito Hirano, Hamaki Inokuchi

Author Affiliations +

Proceedings Volume 8526, Lidar Remote Sensing for Environmental Monitoring XIII; 852604 (2012) https://doi.org/10.1117/12.976293
Event: SPIE Asia-Pacific Remote Sensing, 2012, Kyoto, Japan

Abstract

We have developed a 1.5-μm eye-safe wavelength high average power laser amplifier using an Er,Yb:glass planar waveguide for coherent Doppler LIDAR. Large cooling surface of the planar waveguide enabled high average power pumping for Er,Yb:glass which has low thermal fracture limit. Nonlinear effects are suppressed by the large beam size which is designed by the waveguide thickness and the beam width of the planar direction. Multi-bounce optical path configuration and high-intensity pumping provide high-gain and high-efficient operation using three-level laser material. With pulsed operation, the maximum pulse energy of 1.9 mJ was achieved at the repetition rate of 4 kHz. Output average power of the amplified signal was 7.6W with the amplified gain of more than 20dB. This amplifier is suitable for coherent Doppler LIDAR to enhance the measurable range.

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Takeshi Sakimura, Yojiro Watanabe, Toshiyuki Ando, Shumpei Kameyama, Kimio Asaka, Hisamichi Tanaka, Takayuki Yanagisawa, Yoshihito Hirano, and Hamaki Inokuchi "1.5-μm high-average power laser amplifier using a Er,Yb:glass planar waveguide for coherent Doppler lidar", Proc. SPIE 8526, Lidar Remote Sensing for Environmental Monitoring XIII, 852604 (19 November 2012); https://doi.org/10.1117/12.976293

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