1. Duration-tunable picosecond source at 560 nm with watt-level average power.
- Author
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Runcorn TH, Murray RT, Kelleher EJ, Popov SV, and Taylor JR
- Subjects
- Lasers, Optical Fibers, Optical Imaging instrumentation, Time Factors, Optical Imaging methods
- Abstract
A pulse source at 560 nm that is tunable in duration between 50 ps and 2.7 ns with >1 W of average power and near diffraction-limited beam quality is demonstrated. The source is based on efficient (up to 50%) second-harmonic generation in a periodically poled lithium tantalate crystal of a linearly polarized fiber-integrated Raman amplifier operating at 1120 nm. A duration-tunable ytterbium master-oscillator power-fiber amplifier is used to pulse-pump the Raman amplifier, which is seeded by a continuous-wave distributed-feedback laser diode at 1120 nm. The performance of the system using two different master oscillator schemes is compared. A pulse energy of up to 765 nJ is achieved with a conversion efficiency of 25% from the ytterbium fiber pump, demonstrating a compact and turn-key architecture for obtaining high peak-power radiation at 560 nm.
- Published
- 2015
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