Linewidth enhancement factor of quantum cascade lasers with single phonon resonance-continuum depopulation structure on Peltier cooler |
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| Authors: | Ishihara M Morimoto T Furuta S Kasahara K Akikusa N Fujita K Edamura T |
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| Affiliation: | (Faculty of Science and Engineering, Ritsumeikan University, 1-1-1 Noji-higashi, Kusatsu, Shiga 525-8577, Japan).; |
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| Abstract: | The linewidth enhancement factor (α-factor) of a commercially available 6.1 μm InGaAs/InAlAs distributed-feedback quantum cascade laser capable of continuous-wave operation with a Peltier cooler and its current dependence were investigated. α tended to increase slowly with an increase in current. α, probably affected by detuning, was still smaller than that of conventional 1.55 μm semiconductor laser diodes. |
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