5 November 2010 Frequency doubling of 1560nm diode laser via PPLN and PPKTP crystals and frequency stabilization to rubidium absorption line
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Proceedings Volume 7846, Quantum and Nonlinear Optics; 784619 (2010); doi: 10.1117/12.871688
Event: Photonics Asia 2010, 2010, Beijing, China
Abstract
In our experiment, a polarization-maintaining (PM) fiber-pigtailed butterfly-sealed 1560nm distributed-feedback (DFB) laser diode is amplified by a 5-Watt EDFA, then a multiple-period PPLN crystal (1mm×10mm×20mm) and a single-period PPKTP crystal (1mm×2mm×30mm) are utilized to perform SHG via single pass configuration. The second harmonic power of ~ 239 mW@780 nm for PPLN and ~ 210 mW@780 nm for PPKTP are obtained with ~5W@1560 nm laser input, corresponding to SHG efficiency of ~ 5.2% for PPLN and ~ 4.4% for PPKTP, respectively. Finally the 1560 nm laser diode's frequency is locked to rubidium absorption line via SHG and rubidium absorption spectroscopy, the laser frequency drift for free-running case is ~ 56 MHz in 30 s, the residual frequency after being locked drift is ~ ± 3.5 MHz.
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Shanlong Guo, Jianfeng Yang, Baodong Yang, Tiancai Zhang, Junmin Wang, "Frequency doubling of 1560nm diode laser via PPLN and PPKTP crystals and frequency stabilization to rubidium absorption line", Proc. SPIE 7846, Quantum and Nonlinear Optics, 784619 (5 November 2010); doi: 10.1117/12.871688; https://doi.org/10.1117/12.871688
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KEYWORDS
Crystals

Second-harmonic generation

Semiconductor lasers

Laser crystals

Rubidium

Absorption

Optical amplifiers

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