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
Fig. 2. Schematic diagram of material design for each layer of conical waveguide
Fig. 3. 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
Fig. 4. The relation between (a) dispersion curve and (b) propagation constant of the straight waveguide and waveguide width with a wavelength of 4.6 μm
Fig. 5. The relationship between the cone angle and (a) the transmittance, reflectivity of the port and (b) the optical limiting factor, the waveguide loss
Fig. 6. The relationship between the straight waveguide length and (a) the transmittance, reflectivity of the port and (b) the optical limiting factor, the waveguide loss
Fig. 7. The relationship between the total cavity length and (a) the transmittance, reflectivity of the port and (b) the optical limiting factor, the waveguide loss
Fig. 8. Maximum internal temperature as a function of time evolution for QCL of different (a) heat sink materials and (b) heat sink temperatures
Fig. 9. Maximum internal temperature as a function of time evolution for QCL of (a) different cavity length and (b) different pulse width
Fig. 10. Corresponding time evolutions of temperature distribution for QCL
|
|
Get Citation
Copy Citation Text
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
Category:
Received: Jan. 8, 2024
Accepted: --
Published Online: Jun. 21, 2024
The Author Email: