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《中国物理快报：英文版》
>Temperature Compensation for Threshold Current and Slope Efficiency of 1.3μm InAs/GaAs Quantum-Dot Lasers by Facet Coating Design
Temperature Compensation for Threshold Current and Slope Efficiency of 1.3μm InAs/GaAs Quantum-Dot Lasers by Facet Coating Design
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℃to 70℃,compared with the traditional one with a temperature-independent mirror loss.
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