Xue-Feng Jia, Li-Jun Wang, Ning Zhuo, Jin-Chuan Zhang, Shen-Qiang Zhai, Jun-Qi Liu, Shu-Man Liu, Feng-Qi Liu, Zhanguo Wang. Multi-wavelength sampled Bragg grating quantum cascade laser arrays[J]. Photonics Research, 2018, 6(7): 721
- Photonics Research
- Vol. 6, Issue 7, 721 (2018)
Fig. 1. EL spectrum and the calculated transmission spectrum. The inset displays the enlarged − 2
Fig. 2. (a) Optical microscope image of SBG-QCL array bonded on patterned AlN submount; (b) magnified view of the front facet of the array; (c) SEM image of the sampled grating.
Fig. 3. Measured spectra of the 18 SBG-QCLs from an array with different sampling periods ranging from 8 to 32 μm (from bottom to top).
Fig. 4. (a) Measured spectra of laser #6 in the array at different heat sink temperatures from 20°C to 55°C. The inset shows the tuning of the peak wavenumber with temperature. (b) The P-I-V characteristics of laser #6 in the array.
Fig. 5. Calculated transmission spectrum with a sampling period of 19 μm and base grating period of 1.38 μm. The inset illustrates the breakdown of the translational symmetry.
Fig. 6. Calculated effective refractive index coupling | Δ n |
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Table 1. Detailed Values of the Sampling Period, Emitting Wavelength, and Output Power for All 18 Lasers
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