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Appl. Sci. 2018, 8(3), 439; https://doi.org/10.3390/app8030439

A Tunable CW Orange Laser Based on a Cascaded MgO:PPLN Single-Pass Sum-Frequency Generation Module

1
Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China
2
University of Chinese Academy of Sciences, Beijing 100049, China
*
Author to whom correspondence should be addressed.
Received: 27 January 2018 / Revised: 5 March 2018 / Accepted: 8 March 2018 / Published: 15 March 2018
(This article belongs to the Section Optics and Lasers)
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Abstract

We report an all-solid-state continuous wave (CW) tunable orange laser based on cascaded single-pass sum-frequency generation with fundamental wavelengths at 1545.7 and 975.2 nm using two quasi-phase-matched (QPM) MgO-doped periodically poled lithium niobate (MgO:PPLN) crystals. Up to 10 mW of orange laser is generated in the cascaded module corresponding to a 10.4%/W nonlinear conversion efficiency. The orange output showed a temperature tuning rate of ~0.05 nm/°C, and the beam quality (M2) value of the orange laser was about 2.0. We use this technique to combine the high efficiency offered by uniformly poled crystals and the broad input wavelength acceptance characteristic of step-chirped structures. View Full-Text
Keywords: lithium niobate; sum frequency generation; quasi phase-matching; lasers lithium niobate; sum frequency generation; quasi phase-matching; lasers
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Choge, D.K.; Chen, H.-X.; Tian, B.-L.; Xu, Y.-B.; Li, G.-W.; Liang, W.-G. A Tunable CW Orange Laser Based on a Cascaded MgO:PPLN Single-Pass Sum-Frequency Generation Module. Appl. Sci. 2018, 8, 439.

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