量子阱调制双波长光泵浦垂直外腔面发射半导体激光器
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中国科学院长春光学精密机械与物理研究所 发光学及应用国家重点实验室

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国家重点研发计划(2018YFB2201103),国家自然科学基金重大项目(62090060),国家自然科学基金(61874117,52172165,61804087),吉林省科技发展计划项目(20200401006GX)。


Quantum well modulated optical pumped Vertical External Cavity Surface-Emitting Laserfor Dual-Wavelength Generation
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State Key Laboratory of Luminescence and Application,Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences

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Supported by the State Key Development Program for Basic Research of China (2018YFB2201103), Project supported by the Major Program of the National Natural Science Foundation of China (62090060), the National Natural Science Foundation of China (61874117, 52172165,61804087), the Key Projects of Jilin Province Science and Technology Development Plan, China (20200401006GX).

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    摘要:

    报道了一种采用单个增益芯片实现双波长输出的光泵浦垂直外腔面发射半导体激光器(VECSEL)。VECSEL所用的增益芯片发光区由两组不同发光波长的量子阱组成,其中一组发光波长较短的量子阱采用吸收区泵浦的方式,另一组发光波长较长的量子阱采用阱内泵浦方式。在VECSEL工作时,吸收区泵浦的短波长量子阱率先激射,由于发光波长较长的量子阱对短波长量子阱的强度调制效应,此时可以观察到两种波长的光谱峰值强度随时间周期性振荡,采用高灵敏探测器观察到VECSEL此时的输出激光呈现出脉冲输出形式。随着泵浦功率进一步增加,VECSEL的输出激光呈现稳定的双波长输出,激光波长峰位分别位于966nm和968nm。VECSEL双波长稳定输出时的最大激光功率可以达到560mW,光斑在正交方向呈现对称高斯形貌,正交方向发散角分别为6.68°和6.87°。

    Abstract:

    Optically pumped dual-wavelength vertical external cavity surface emitting semiconductor laser (VECSEL) with a single gain chip is reported. The active region of the gain chip is composed of two groups of quantum wells with different lasing wavelengths, one group of quantum wells with shorter wavelength operates by absorption pumping, and the other group of quantum wells with longer wavelength operates by in-well pumping. When the VECSEL is operating, the short-wavelength quantum wells pumped by the absorption region are first lased, due to the intensity modulation effect of the long-wavelength quantum wells on the short-wavelength quantum wells, it can be observed that the peak intensity of the spectrum oscillates periodically with time, pulsed operation of the VECSEL was observed by highly sensitive detector. With the increasing of the pump power, stable dual-wavelength emission was achieved, the peak positions of emission wavelength are 966nm and 968nm respectively. The output power of the stable dual-wavelength emission can reach 560mW, and the far fields show Gaussian cross-sections in orthogonal dimensions, and the divergence angles of 6.68° and 6.87° are obtained.

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  • 收稿日期:2022-02-10
  • 最后修改日期:2022-03-23
  • 录用日期:2022-03-23
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