1. Energy extraction in dual-wavelength Q-switched laser with a common upper laser level
- Author
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Kohei Mizutani, Shoken Ishii, Atsushi Sato, Kazuhiro Asai, and Shimpei Okubo
- Subjects
Quantum optics ,Materials science ,Physics and Astronomy (miscellaneous) ,General Engineering ,Physics::Optics ,General Physics and Astronomy ,Laser ,Q-switching ,law.invention ,Pulse (physics) ,law ,Ultrafast laser spectroscopy ,Physics::Atomic Physics ,Laser power scaling ,Atomic physics ,Energy (signal processing) ,Pulse-width modulation - Abstract
The effect of lower-laser-level lifetimes on Q-switched pulse generation in a dual-wavelength solid-state laser with a common upper laser level was numerically and experimentally investigated. A rate-equation model that accounts for finite lower-laser-level lifetimes was developed, and for a Nd:YAG laser operating at 1064 and 1319 nm, numerical simulations of dual-wavelength pulse generation were performed with and without the effects of lower-laser-level lifetimes. In the laser experiments, characteristics of the dual-wavelength Q-switched pulses agree reasonably well with theoretical predictions. As a result, we found that both the total energy of the two Q-switched pulses and the ratio of 1064–1319-nm pulse energies were strongly affected by the lower-laser-level lifetimes when the Q-switched pulse width was comparable or shorter than the lower-laser-level lifetime. more...
- Published
- 2014
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