Chin. Phys. Lett.  2019, Vol. 36 Issue (8): 084204    DOI: 10.1088/0256-307X/36/8/084204
FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
Wavelength-Locked 878.6nm In-Band Pumped Intra-Cavity 2.1μm Optical Parametric Oscillator
Shuang Wu, Yong-Ji Yu**, Yue Li, Yu-Heng Wang, Jing-Liang Liu, Guang-Yong Jin
Jilin Key Laboratory of Solid Laser Technology and Application, College of Science, Changchun University of Science and Technology, Changchun 130022
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Shuang Wu, Yong-Ji Yu, Yue Li et al  2019 Chin. Phys. Lett. 36 084204
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Abstract We report herein a high-power folded intra-cavity 2.1 μm optical parametric oscillator (ICOPO) which is the first example of an ICOPO that utilizes a wavelength-locked 878.6 nm in-band pumped Nd:YVO$_{4}$ laser as the pump source. The thermal effect of PPMgLN crystal and the divergence angle of the incident laser are considered comprehensively to determine the 2128 nm degenerate temperature. In the experiment, the functions of different output coupler transmittances and different repetition rates on the parametric laser output power are studied, respectively. The temperature versus parametric laser output power in an in-band pumped non-wavelength-locked 880 nm laser diode (LD) and in a wavelength-locked 878.6 nm LD is compared. A maximum output power of 5.87 W is obtained at the pump power of 56.9 W when the repetition rate is 80 kHz. The corresponding conversion efficiency is 14.55%, with a linewidth of 73.65 nm and pulse width of 3.62 ns. The wavelength-locked 878.6 nm LD in-band pumping technology can stabilize the 2.1 μm laser output power of Nd:YVO$_{4}$ crystal effectively in the environment of intense temperature change.
Received: 23 April 2019      Published: 22 July 2019
PACS:  42.65.Yj (Optical parametric oscillators and amplifiers)  
  42.65.Lm (Parametric down conversion and production of entangled photons)  
  42.55.Xi (Diode-pumped lasers)  
Fund: Supported by the National Natural Science Foundation of China under Grant No 61505013, the Postdoctoral Science Foundation of China under Grant No 2016M591466, and the Science and Technology Department Project of Jilin Province under Grant Nos 20170204046GX and 20190101004JH.
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https://cpl.iphy.ac.cn/10.1088/0256-307X/36/8/084204       OR      https://cpl.iphy.ac.cn/Y2019/V36/I8/084204
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Shuang Wu
Yong-Ji Yu
Yue Li
Yu-Heng Wang
Jing-Liang Liu
Guang-Yong Jin
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