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Proceedings Paper

Development and testing of a high-power Q-switched DPSS laser for lidar applications: ESA QOMA project case
Author(s): Georgios Avdikos; Christos Evangelatos; Dimitrios Papadopoulos; George Tsaknakis; Paraskevas Bakopoulos; Alexandros Papayannis; Georgios Tzeremes
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Paper 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.

Paper Details

Date Published: 22 October 2013
PDF: 7 pages
Proc. SPIE 8894, Lidar Technologies, Techniques, and Measurements for Atmospheric Remote Sensing IX, 88940E (22 October 2013); doi: 10.1117/12.2029033
Show Author Affiliations
Georgios Avdikos, Raymetrics S.A. (Greece)
Christos Evangelatos, National Technical Univ. of Athens (Greece)
Dimitrios Papadopoulos, Univ. of Ioannina (Greece)
George Tsaknakis, National Technical Univ. of Athens (Greece)
Paraskevas Bakopoulos, National Technical Univ. of Athens (Greece)
Alexandros Papayannis, National Technical Univ. of Athens (Greece)
Georgios Tzeremes, European Space Agency (Netherlands)

Published in SPIE Proceedings Vol. 8894:
Lidar Technologies, Techniques, and Measurements for Atmospheric Remote Sensing IX
Upendra N. Singh; Gelsomina Pappalardo, Editor(s)

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