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Temperature Compensation for Threshold Current and Slope Efficiency of 1.3 μm InAs/GaAs Quantum-Dot Lasers by Facet Coating Design
- Source :
- Chinese Physics Letters. 28:044201
- Publication Year :
- 2011
- Publisher :
- IOP Publishing, 2011.
-
Abstract
- We demonstrate a technique of temperature compensation for 1.3μm InAs/GaAs quantum-dot (QD) lasers by facet coating design. The key point of the technique is to make sure that the mirror loss of the lasers decreases as the temperature rises. To realize this, we design a type of facet coating by shifting the central wavelength of the facet coating from 1310nm to 1480nm, whose reflectivity increases as the emission wavelength of the lasers red-shifts. Consequently, the laser with the new facet coating exhibits a characteristic temperature doubled in size and a more stable slope efficiency in the temperature range from 10°C to 70°C, compared with the traditional one with a temperature-independent mirror loss.
Details
- ISSN :
- 17413540 and 0256307X
- Volume :
- 28
- Database :
- OpenAIRE
- Journal :
- Chinese Physics Letters
- Accession number :
- edsair.doi...........5c861a4969c0e3155e381aa0eb594d86