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Proceedings Article

Compositionally tuned Nd:(YxLu1-x)3Ga5O12-laser at 935 nm for H2O-dial systems

[+] Author Affiliations
Jens Löhring, Michael Schlösser, Hans-Dieter Hoffmann

Fraunhofer-Institut für Lasertechnik (Germany)

Proc. SPIE 7912, Solid State Lasers XX: Technology and Devices, 79121N (February 15, 2011); doi:10.1117/12.878478
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From Conference Volume 7912

  • Solid State Lasers XX: Technology and Devices
  • W. Andrew Clarkson; Norman Hodgson; Ramesh Shori
  • San Francisco, California, USA | January 22, 2011

abstract

For future satellite based water vapor DIAL systems efficient and rugged sources preferably around 935 nm are required. Especially for the WALES system (Water Vapour Lidar Experiment in Space) four wavelengths between 935.561 nm and 935.906 nm (vac.) have to be addressed. A promising candidate for the direct generation within this spectral range is a simple diode pumped setup based on compositionally tuned neodymium-doped mixed garnet crystals. Within the scope of this work, novel Nd:(YxLu1-x)3Ga5O12-crystals (Nd:YLuGG) with different compositions (0≤x≤1) were investigated. Beside the characterization of some relevant crystal properties laser experiments in quasi-continuous operation, Qswitched operation and in single-longitudinal-mode operation were performed. By the R2-Z5-transition wavelengths between 935.3 nm and 936.6 nm (vac.) can be addressed with different compositions x. At a repetition rate of 100 Hz nearly 6 mJ were extracted in longitudinal multimode around 935.7 nm (vac.) from a Nd:(Y0.58Lu0.42)3Ga5O12-crystal. The cavity was injection seeded and stabilized with the ramp-and-fire-method to obtain single frequency radiation. At 935.7 nm more than 4.7 mJ were generated. The laser could be tuned over a range of about ± 0.22 nm in single-longitudinal- mode operation.

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Citation

Jens Löhring ; Michael Schlösser and Hans-Dieter Hoffmann
"Compositionally tuned Nd:(YxLu1-x)3Ga5O12-laser at 935 nm for H2O-dial systems", Proc. SPIE 7912, Solid State Lasers XX: Technology and Devices, 79121N (February 15, 2011); doi:10.1117/12.878478; http://dx.doi.org/10.1117/12.878478


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