Hongda Wu, Mingzhu Yuan, Feitong Chen, Dong Liu, Chong Liu
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引用次数: 0
Abstract
A sub-nanosecond blue laser with a large longitudinal mode spacing at 486 nm was demonstrated based on a frequency-doubled potassium titanyl phosphate optical parametric oscillator. The pump laser was a 532 nm green laser with a pulse width of 0.76 ns at the maximum pulse energy of 4 mJ. With a cavity optical length of 8.9 mm, the output energy of 972 nm signal laser reached 0.8 mJ, corresponding to a conversion efficiency of 20%. The signal laser was frequency-doubled to a blue laser with a longitudinal mode spacing of 16.8 GHz, matching the frequency spacing of seawater Brillouin scattering signal peaks excited by 486 nm laser. The spectral linewidth, pulse width and single pulse energy of the blue laser were 0.28 nm, 0.57 ns, and 80 μJ, respectively. This blue laser provides a reliable laser source for verifying the feasibility of multi-longitudinal-mode laser technique in oceanic high-spectral-resolution lidar.
期刊介绍：
Features publication of experimental and theoretical investigations in applied physics
Offers invited reviews in addition to regular papers
Coverage includes laser physics, linear and nonlinear optics, ultrafast phenomena, photonic devices, optical and laser materials, quantum optics, laser spectroscopy of atoms, molecules and clusters, and more
94% of authors who answered a survey reported that they would definitely publish or probably publish in the journal again
Publishing essential research results in two of the most important areas of applied physics, both Applied Physics sections figure among the top most cited journals in this field.
In addition to regular papers Applied Physics B: Lasers and Optics features invited reviews. Fields of topical interest are covered by feature issues. The journal also includes a rapid communication section for the speedy publication of important and particularly interesting results.
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