Rate equation analysis of frequency chirp in optically injection-locked quantum cascade lasers

C. Wang; F. Grillot; V. I. Kovanis; J. D. Bodyfelt; J. Even

doi:10.1117/12.2037745

7 March 2014 Rate equation analysis of frequency chirp in optically injection-locked quantum cascade lasers

C. Wang, F. Grillot, V. I. Kovanis, J. D. Bodyfelt, J. Even

Proceedings Volume 8980, Physics and Simulation of Optoelectronic Devices XXII; 898014 (2014) https://doi.org/10.1117/12.2037745
Event: SPIE OPTO, 2014, San Francisco, California, United States

Abstract

The frequency chirp characteristics of an optically injection-locked quantum cascade laser are theoretically investigated. The key parameter chirp-to-power ratio (CPR) is analytically derived from a full rate equation model. The CPR value can be efficiently reduced by increasing optical injection strength, especially at modulation frequencies less than 10 GHz. In contrast to interband lasers, both positive and negative frequency detuning increase the CPR. Since the frequency detuning is also predicted to enhance the intensity modulation response, a trade-off is required in the optical injection to simultaneously obtain a large modulation bandwidth and low frequency chirp.

Citation Download Citation

C. Wang, F. Grillot, V. I. Kovanis, J. D. Bodyfelt, and J. Even "Rate equation analysis of frequency chirp in optically injection-locked quantum cascade lasers", Proc. SPIE 8980, Physics and Simulation of Optoelectronic Devices XXII, 898014 (7 March 2014); https://doi.org/10.1117/12.2037745

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