High-power passively Q-switched Nd:KGW laser pumped at 877 nm

In this work, we demonstrate, for the first time, a high-power passively Q-switched N g -cut Nd 3+ :KGd(WO 4 ) 2 /Cr 4+ :YAG laser pumped at 877 nm. The maximum average output power of ~1.6 W is obtained at the pump power of 5.22 W, when a saturable absorber with 98 % of initial transmission is used...

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Bibliographic Details
Published in:Applied physics. B, Lasers and optics Lasers and optics, 2016-06, Vol.122 (6), p.1-7, Article 171
Main Authors: Huang, K., Ge, W. Q., Zhao, T. Z., Feng, C. Y., Yu, J., He, J. G., Xiao, H., Fan, Z. W.
Format: Article
Language:English
Subjects:
Energy transmission
Engineering
Holes
Lasers
Optical Devices
Optics
Photonics
Physical Chemistry
Physics
Physics and Astronomy
Pulse width
Pumps
Quantum Optics
Repetition
Thermal management
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Summary:In this work, we demonstrate, for the first time, a high-power passively Q-switched N g -cut Nd 3+ :KGd(WO 4 ) 2 /Cr 4+ :YAG laser pumped at 877 nm. The maximum average output power of ~1.6 W is obtained at the pump power of 5.22 W, when a saturable absorber with 98 % of initial transmission is used. The corresponding pulse energy is up to 16 µJ. The maximum pulse energy of 25.3 µJ is achieved at a repetition rate of 59 kHz, by employing a saturable absorber with 95 % of initial transmission. The corresponding pulse width and average output power are 89.0 ns and 1.5 W, respectively. A careful cavity design and a good thermal management ensure nearly TEM 00 output with M 2  ≤ 1.22 within the whole range of operation in both N p and N m directions at 877 nm pump.
ISSN:0946-2171
1432-0649
DOI:10.1007/s00340-016-6439-3