Wide-temperature-range operation of quantum-dot LC-DFB lasers from −40°C to 110°C
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By optimizing the grating period and adopting a high-temperature-tolerant p-doped quantum-dot (QD) laser structure, we demonstrate an O-band laterally coupled distributed feedback (LC-DFB) laser exhibiting stable single-longitudinal-mode operation over an extended temperature range. The device maintains an SMSR greater than 50 dB and shows a threshold current variation of only 7.7 mA from -40°C to 90°C. Single-mode lasing is further sustained up to 110°C, highlighting the excellent thermal robustness of the proposed QD LC-DFB design.
Fields of Study & Subjects
Semiconductor Lasers and Optical Devices
Semiconductor Quantum Structures and Devices
Photonic and Optical Devices
Publication details
- Journal / source
- Optics Letters
- Volume
- 51
- Issue
- 7
- Pages
- 1963–1963
- Publication date
- 16 March 2026
- Language
- EN