NDLI: Diode end pumped Nd:YAG laser at 946 nm with high pulse energy limited by thermal lensing

Content Provider	Springer Nature Link
Author	Eichler, H. J. Riesbeck, T. Chen, J. Wang, S. Wang, X. Ge, J. Kallmeyer, F.
Copyright Year	2009
Abstract	Diode lasers with peak powers in the kW range and pulse durations of micro- to milli-seconds have been available since several years. Pumping solid state lasers with such sources yield high output pulse energies in spiking or Q-switched operation. The output energy is limited by the thermal lens effects, which are measured and calculated. The time dependent heat conduction equation in the laser crystal is solved numerically to predict the overall temperature rise and thermal lensing. The thermally induced optical path difference is approximated by a quadratic distribution to obtain the focal length f of the thermal lens. The thermal lens coefficient K=1/(f⋅P av), which depends only weakly on the heat transfer coefficient H of the laser crystal to the heat sink, decreases exponentially with increasing pump frequency until the steady state is reached. Experiments were done with a Nd:YAG crystal at different pump frequencies up to 100 Hz. The thermal lens coefficients obtained by the power maxima of asymmetric flat-flat resonators agree with our calculations.
Ending Page	730
Page Count	10
Starting Page	721
File Format	PDF
ISSN	09462171
e-ISSN	14320649
Journal	Applied Physics B
Issue Number	4
Volume Number	95
Language	English
Publisher	Springer-Verlag
Publisher Date	2009-04-02
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Engineering Optical Spectroscopy, Ultrafast Optics Laser Technology and Physics, Photonics Physical Chemistry Electromagnetism, Optics and Lasers Quantum Optics, Quantum Electronics, Nonlinear Optics
Content Type	Text
Resource Type	Article
Subject	Physics and Astronomy

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