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Proceedings Paper

Very high-efficiency frequency-tripled Nd:YAG MOPA for spaceborne lidar
Author(s): J. Luttmann; K. Nicklaus; V. Morasch; S. Fu; M. Höfer; M. Traub; H.-D. Hoffmann; R. Treichel; C. Wührer; P. Zeller
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Paper Abstract

For spaceborne lidar like the atmospheric backscatter lidar (e.g. ATLID on the ESA EarthCARE mission) highly reliable and efficient laser sources are needed. As pre-development model we realized a Nd:YAG MOPA diode pumped at 100 Hz. With more than 21 % optical-optical efficiency the amplifier based on the InnoSlab design raises the 8 mJ pulse energy from the single frequency rod oscillator to more than 70 mJ. Frequency-tripling leads to more than 25 mJ at 355 nm and a beam quality of M2 < 1.7. The total optical-optical efficiency of more than 7.5 % exceeds the efficiency of comparable current lidar transmitter systems at least by a factor of 2. The laser is designed to cope with diode degradation or failure. Moderate pulse intensities in the InnoSlab amplifier offer excellent possibilities to scale the pulse energy to several 100 mJ in a most reliable and efficient way.

Paper Details

Date Published: 13 March 2008
PDF: 12 pages
Proc. SPIE 6871, Solid State Lasers XVII: Technology and Devices, 687109 (13 March 2008); doi: 10.1117/12.763640
Show Author Affiliations
J. Luttmann, Fraunhofer Institute for Laser Technology (Germany)
K. Nicklaus, Fraunhofer Institute for Laser Technology (Germany)
V. Morasch, Fraunhofer Institute for Laser Technology (Germany)
S. Fu, Fraunhofer Institute for Laser Technology (Germany)
M. Höfer, Fraunhofer Institute for Laser Technology (Germany)
M. Traub, Fraunhofer Institute for Laser Technology (Germany)
H.-D. Hoffmann, Fraunhofer Institute for Laser Technology (Germany)
R. Treichel, EADS Astrium GmbH (Germany)
C. Wührer, EADS Astrium GmbH (Germany)
P. Zeller, EADS Astrium GmbH (Germany)


Published in SPIE Proceedings Vol. 6871:
Solid State Lasers XVII: Technology and Devices
W. Andrew Clarkson; Norman Hodgson; Ramesh K. Shori, Editor(s)

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