中国物理B ›› 2008, Vol. 17 ›› Issue (4): 1286-1290.doi: 10.1088/1674-1056/17/4/023

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Compact efficient optical parametric generator internal to a Q-switched Nd:YVO4 laser with periodically poled MgO:LiNbO3

张铁犁1, 徐德刚1, 王鹏1, 纪峰2, 姚建铨2, 张百钢2   

  1. (1)College of Precision Instrument and Opto-electronics Engineering, Institute of Laser and Optoelectronics, Tianjin University, Tianjin 300072, China; (2)College of Precision Instrument and Opto-electronics Engineering, Institute of Laser and Optoelectronics, Tianjin University, Tianjin 300072, China;Key Laboratory of Optoelectric Information Science and Technology, Ministry of Education, Tianjin Universit
  • 收稿日期:2007-06-15 修回日期:2007-08-21 出版日期:2008-04-20 发布日期:2008-04-01
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos 10474071 and 60671036).

Compact efficient optical parametric generator internal to a Q-switched Nd:YVO4 laser with periodically poled MgO:LiNbO3

Ji Feng(纪峰)a) b)†, Yao Jian-Quan(姚建铨)a) b), Zhang Bai-Gang(张百钢)a) b), Zhang Tie-Li(张铁犁)a) , Xu De-Gang(徐德刚)a) , and Wang Peng(王鹏)a)   

  1. a College of Precision Instrument and Opto-electronics Engineering, Institute of Laser and Optoelectronics, Tianjin University, Tianjin 300072, China; b Key Laboratory of Optoelectric Information Science and Technology, Ministry of Education, Tianjin University, Tianjin 300072, China
  • Received:2007-06-15 Revised:2007-08-21 Online:2008-04-20 Published:2008-04-01
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos 10474071 and 60671036).

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摘要： This paper demonstrates a compact efficient optical parametric generator internal to a Q-switched diode-end-pumped Nd:YVO$_{4}$ laser with periodically poled MgO:LiNbO3(PPMgLN). With the Q-switch set at a repetition rate of 25kHz and the PPMgLN crystal operated at room temperature (25\du\,), the intracavity optical parametric generator threshold was reached as a diode pump power of 0.9\,W. A maximum signal output power of 0.34W with a pulse width of 25\,ns and a beam quality factor of 1.4 was obtained at an incident diode power of 3.4\,W, leading to a conversion efficiency of 10{\%} with a slope efficiency of 14.4{\%}. By varying the crystal temperature from 25 to 200\du, the output signal wavelengths were tuned in range of 1506--1565\,nm. Over a 30-minutes interval, the instability of the signal power was measured to be less than 1{\%}. In addition, the threshold pump intensity for the intracavity optical parametric generator is theoretically investigated, and the obtained result is in good agreement with the experimental results.

关键词: quasi-phase-matching, intracavity optical parametric generator, periodically poled MgO-doped lithium niobate (PPMgLN)

Abstract: This paper demonstrates a compact efficient optical parametric generator internal to a Q-switched diode-end-pumped Nd:YVO$_{4}$ laser with periodically poled MgO:LiNbO3(PPMgLN). With the Q-switch set at a repetition rate of 25kHz and the PPMgLN crystal operated at room temperature (25℃), the intracavity optical parametric generator threshold was reached as a diode pump power of 0.9 W. A maximum signal output power of 0.34W with a pulse width of 25 ns and a beam quality factor of 1.4 was obtained at an incident diode power of 3.4 W, leading to a conversion efficiency of 10%with a slope efficiency of 14.4%. By varying the crystal temperature from 25 to 200℃, the output signal wavelengths were tuned in range of 1506--1565 nm. Over a 30-minutes interval, the instability of the signal power was measured to be less than 1%. In addition, the threshold pump intensity for the intracavity optical parametric generator is theoretically investigated, and the obtained result is in good agreement with the experimental results.

Key words: quasi-phase-matching, intracavity optical parametric generator, periodically poled MgO-doped lithium niobate (PPMgLN)

中图分类号:  (Semiconductor lasers; laser diodes)

  • 42.55.Px
42.60.By (Design of specific laser systems) 42.65.Ky (Frequency conversion; harmonic generation, including higher-order harmonic generation) 42.65.Lm (Parametric down conversion and production of entangled photons)