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Intensity Noise Properties of Mid-Infrared Injection Locked Quantum Cascade Lasers: I. Modeling

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4 Author(s)
Simos, H. ; Dept. of Electron., Technologichal Educ. Inst. of Piraeus, Athens, Greece ; Bogris, A. ; Syvridis, D. ; Elsasser, W.

In this paper, we numerically investigate the effect of optical injection locking on the noise properties of mid-infrared quantum cascade lasers. The analysis is carried out by means of a rate equation model, which takes into account the various noise contributions and the injection of the master laser. The obtained results indicate that the locked slave laser may operate under reduced intensity noise levels compared with the free running operation. In addition, optimization of the locking process leads to further suppression of the intensity noise when the slave laser is biased close to the free-running threshold current. The main factors that significantly affect the locking process and the achievable noise levels are the injected optical power and the master-slave frequency detuning.

Published in:

Quantum Electronics, IEEE Journal of  (Volume:50 ,  Issue: 2 )