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Proceedings Paper

Dual-wavelength resonant pumping of compact Er:YAG lasers providing high power output at 1645.55 nm for methane detection
Author(s): H. Fritsche; O. Lux; C. Schuett; S. Heinemann; W. Gries; H. J. Eichler
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Paper Abstract

Eye safe laser operation of resonantly pumped Er:YAG laser systems is demonstrated in cw and Q-switched operation. Using narrow bandwidth diode laser modules we realized a single pump configuration providing an optical efficiency of about 30% which leads to an output power of 2.5 in cw mode and 6.6 mJ in Q-switched operation with a pulse width of 60 ns at pulse repetition frequencies of up to 125 Hz. By implementing an intra-cavity etalon we were able tune the laser wavelength while achieving a spectral width of 0.35 pm and a long-term frequency fluctuation of about 40 MHz. In dualside pumping configuration we obtained dual-wavelength pumping with 1532 nm and 1455 nm diode lasers which leads to 1.1 W output power. Compared to single wavelength pumping, the efficiency of the laser system was doubled. The feasibility of methane detection was demonstrated In cw and pulsed mode.

Paper Details

Date Published: 22 October 2013
PDF: 8 pages
Proc. SPIE 8894, Lidar Technologies, Techniques, and Measurements for Atmospheric Remote Sensing IX, 88940A (22 October 2013); doi: 10.1117/12.2029088
Show Author Affiliations
H. Fritsche, Technische Univ. Berlin (Germany)
O. Lux, Technische Univ. Berlin (Germany)
C. Schuett, Technische Univ. Berlin (Germany)
S. Heinemann, DirectPhotonics Industries GmbH (Germany)
W. Gries, DirectPhotonics Industries GmbH (Germany)
H. J. Eichler, Technische Univ. Berlin (Germany)

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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