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- Title
Diode-Pumped Nd:KGd(WO) Laser: Lasing at Fundamental and Second Harmonic Frequencies.
- Authors
Bui, A.; Dashkevich, U.; Orlovich, V.; Khodasevich, I.
- Abstract
High-power cw and quasi-cw lasing at the fundamental and second harmonic frequencies is obtained from Nd:KGd(WO ) lasers based on Np- and Ng-cut crystals pumped longitudinally by a diode laser at 879 nm. Because of different crystal lengths, the limiting pump power beyond which the crystals undergo thermomechanical damage is 26.8 W for the N -cut and 17.3 W for the N -cut. At these pump powers the cw outputs at λ = 1067.2 nm are 9.4 and 5.4 W, respectively, and the N -cut crystal output is TEM at the fundamental frequency. With quasicontinuous pumping at a 10% duty cycle the instantaneous laser power reaches ~11 W for both cuts with a periodic duration of 10-20 ms. The differential lasing efficiency relative to the absorbed pump power is 66.4% for cw lasing and 77.4% for quasi-cw operation. With intracavity frequency doubling using a KTP crystal, better results were obtained with the N -cut crystal because of its simpler thermal lensing. The maximum second harmonic power was ~1.1 W for cw operation and ~2.6 W for quasi-cw operation with a diode laser power of 27.3 W.
- Subjects
NEODYMIUM compounds; HARMONIC oscillators; SEMICONDUCTOR lasers; THERMOMECHANICAL treatment; THERMAL properties of crystals
- Publication
Journal of Applied Spectroscopy, 2015, Vol 82, Issue 4, p578
- ISSN
0021-9037
- Publication type
Article
- DOI
10.1007/s10812-015-0148-2