Development and testing of a high-power Q-switched DPSS laser for lidar applications: ESA QOMA project case

Georgios Avdikos; Christos Evangelatos; Dimitrios Papadopoulos; George Tsaknakis; Paraskevas Bakopoulos; Alexandros Papayannis; Georgios Tzeremes

doi:10.1117/12.2029033

22 October 2013 Development and testing of a high-power Q-switched DPSS laser for lidar applications: ESA QOMA project case

Georgios Avdikos, Christos Evangelatos, Dimitrios Papadopoulos, George Tsaknakis, Paraskevas Bakopoulos, Alexandros Papayannis, Georgios Tzeremes

Author Affiliations +

Proceedings Volume 8894, Lidar Technologies, Techniques, and Measurements for Atmospheric Remote Sensing IX; 88940E (2013) https://doi.org/10.1117/12.2029033
Event: SPIE Remote Sensing, 2013, Dresden, Germany

Abstract

We present experimental results obtained in the frame of the QOMA project involving the design and development of a diode-pumped solid state (DPSS) Nd:YAG laser, operating at passively and actively Q-switched pulsed mode. Continuous wave (cw) and passively Q-switched operations are demonstrated obtaining 7.5 W and 2 mJ at 100 Hz, respectively with excellent beam quality using a multi-segmented (0.1%, 0.23%, 0.6% at Nd) Nd:YAG crystal. Comparisons with a uniform Nd:YAG rod reveals improvements of up to 64% in normalized optical conversion efficiency and 67% in output power for retaining the same beam quality. Active Q-switching operation was also obtained with the same multi-segmented crystal, demonstrating pulse energy of 1.20 mJ at 5 kHz repetition rate, preserving an almost Gaussian beam profile.

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Georgios Avdikos, Christos Evangelatos, Dimitrios Papadopoulos, George Tsaknakis, Paraskevas Bakopoulos, Alexandros Papayannis, and Georgios Tzeremes "Development and testing of a high-power Q-switched DPSS laser for lidar applications: ESA QOMA project case", Proc. SPIE 8894, Lidar Technologies, Techniques, and Measurements for Atmospheric Remote Sensing IX, 88940E (22 October 2013); https://doi.org/10.1117/12.2029033

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KEYWORDS

Crystals

Laser crystals

Nd:YAG lasers

Q switches

Thermal effects

Continuous wave operation

Q switched lasers

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