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- Title
Versatile Raman fiber laser for sodium laser guide star.
- Authors
Zhang, Lei; Jiang, Huawei; Cui, Shuzhen; Hu, Jinmeng; Feng, Yan
- Abstract
Robust high-power narrow-linewidth lasers at 589nm are required for sodium laser guide star adaptive optics in astronomy. A high-power 589nm laser based on Raman fiber amplifier is reported here, which works in both continuous-wave and pulsed formats. In the continuous-wave case, the laser produces more than 50 W output. In the pulsed case, the same laser produces square-shaped pulses with tunable repetition rate (500 Hz to 10 kHz) and duration (1 ms to 30 µs). The peak power is as high as 84 W and remains constant during the tuning. The laser also emits an adjustable sideband at 1.71GHz away from the main laser frequency for better sodium excitation. The versatility of the laser offers much flexibility in laser guide star application.
- Subjects
LASER guide star adaptive optics; OPTICAL amplifiers; OPTICAL phase matching; FIBER lasers; IMAGING systems in astronomy
- Publication
Laser & Photonics Reviews, 2014, Vol 8, Issue 6, p889
- ISSN
1863-8880
- Publication type
Article
- DOI
10.1002/lpor.201400055