Infrared and Laser Engineering, Volume. 53, Issue 5, 20240015(2024)

Optical and thermal simulation design of tapered waveguide for high-power pulsed quantum cascade laser

Chengcheng Zhang1,2, Dongliang Zhang1,2, Rui Wang1,2, Mingxin Luo1,2, Qinghua Lin1,2, Xiantong Zheng1,3, Lianqing Zhu1,2, and Weiping Wang3
Author Affiliations
  • 1Beijing Engineering Research Center for Optoelectronic Information and Instruments, Beijing Information Science & Technology University, Beijing 100016, China
  • 2Instrumentation Science and Optoelectronic Engineering College, Beijing Information Science & Technology University, Beijing 100016, China
  • 3Intelligent Technology Research Institute of China Electronics Technology Group Corporation, Beijing 100015, China
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    Figures & Tables(12)
    Device structure diagram
    Schematic diagram of material design for each layer of conical waveguide
    The wavelength of 4.6 μm and the waveguide width of 10 μm correspond to the mode field distribution in the cross section of the straight waveguide. (a) TM (left) and TE (right) fundamental mode; (b) TM (left) and TE (right) first-order mode; (c) TM (left) and TE (right) second-order mode; (d) Leakage mode
    The relation between (a) dispersion curve and (b) propagation constant of the straight waveguide and waveguide width with a wavelength of 4.6 μm
    The relationship between the cone angle and (a) the transmittance, reflectivity of the port and (b) the optical limiting factor, the waveguide loss
    The relationship between the straight waveguide length and (a) the transmittance, reflectivity of the port and (b) the optical limiting factor, the waveguide loss
    The relationship between the total cavity length and (a) the transmittance, reflectivity of the port and (b) the optical limiting factor, the waveguide loss
    Maximum internal temperature as a function of time evolution for QCL of different (a) heat sink materials and (b) heat sink temperatures
    Maximum internal temperature as a function of time evolution for QCL of (a) different cavity length and (b) different pulse width
    Corresponding time evolutions of temperature distribution for QCL
    • Table 1. The material thickness and refractive index of each layer of waveguide

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      Table 1. The material thickness and refractive index of each layer of waveguide

      Material and dopingRefractive indexThickness/μm
      Substrate InP(2E17 cm−33.091+0.000i100
      Upper cladding InP(2E17 cm−33.091+0.000i1
      In0.53Ga0.47As(2E16 cm−3)3.393+0.000i0.05
      Core( 2E17 cm−3)3.237+0.000i1.98
      In0.53Ga0.47As(2E16 cm−3)3.393+0.000i0.05
      Lower cladding InP(2E17 cm−33.091+0.000i2
      Cap InP( 1E19 cm−3)2.678+0.011i1
      SiO21.45+0.000i0.5
      Au3.319+28.411i3
    • Table 2. Material parameters in thermal simulation

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      Table 2. Material parameters in thermal simulation

      MaterialThermal conductivity/W·(m·K)−1Density/kg·m−3Specific heat/J·(kg·K)−1
      InP282×103T−1.454810410
      SiO2974×10−4+538×10−5T-469×10−8T22200730
      In0.53Ga0.47As23−930×10−4T+106×10−6T 25500360
      CoreK||=5.3−3.9×10−3T+5.3×10−7T2K=2.3±0.2
      Au337−660×10−4T19300129
      Ti31.46−4338×10−5T+4×10−5T24506522
      In93.9−696×10−4T+986×10−7T27310233
      Cu349+14710T−18960384
      Diamond4.35×106T−1.33520630
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    Chengcheng Zhang, Dongliang Zhang, Rui Wang, Mingxin Luo, Qinghua Lin, Xiantong Zheng, Lianqing Zhu, Weiping Wang. Optical and thermal simulation design of tapered waveguide for high-power pulsed quantum cascade laser[J]. Infrared and Laser Engineering, 2024, 53(5): 20240015

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    Paper Information

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    Received: Jan. 8, 2024

    Accepted: --

    Published Online: Jun. 21, 2024

    The Author Email:

    DOI:10.3788/IRLA20240015

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