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Appl. Sci. 2018, 8(6), 878; https://doi.org/10.3390/app8060878

A Tunable Mid-Infrared Solid-State Laser with a Compact Thermal Control System

1
Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China
2
University of Chinese Academy of Sciences, Beijing 100039, China
*
Author to whom correspondence should be addressed.
Received: 3 May 2018 / Revised: 18 May 2018 / Accepted: 20 May 2018 / Published: 26 May 2018
(This article belongs to the Special Issue State-of-the-art Laser Gas Sensing Technologies)
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Abstract

Tunable mid-infrared lasers are widely used in laser spectroscopy, gas sensing and many other related areas. In order to solve heat dissipation problems and improve the environmental temperature adaptability of solid-state laser sources, a tunable all-fiber laser pumped optical parametric oscillator (OPO) was established, and a compact thermal control system based on thermoelectric coolers, an automatic temperature control circuit, cooling fins, fans and heat pipes was integrated and designed for the laser. This system is compact, light and air-cooling which satisfies the demand for miniaturization of lasers. A mathematical model and method was established to estimate the cooling capacity of this thermal control system under different ambient environments. A finite-element model was built and simulated to analyze the thermal transfer process. Experiments in room and high temperature environments were carried out and showed that the substrate temperature of a pump module could be maintained at a stable value with controlled precision to 0.2 degrees, while the output power stability of the laser was within ±1%. The experimental results indicate that this compact air-cooling thermal control system could effectively solve the heat dissipation problem of mid-infrared solid-state lasers with a one hundred watts level pump module in room and high temperature environments. View Full-Text
Keywords: tunable mid-infrared solid-state laser; thermal control; all-fiber laser; thermoelectric cooling; finite-element analysis; optical parametric oscillator tunable mid-infrared solid-state laser; thermal control; all-fiber laser; thermoelectric cooling; finite-element analysis; optical parametric oscillator
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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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Yu, D.; He, Y.; Zhang, K.; Pan, Q.; Chen, F.; Guo, L. A Tunable Mid-Infrared Solid-State Laser with a Compact Thermal Control System. Appl. Sci. 2018, 8, 878.

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