Gain saturation effects in THz quantum cascade lasers-Reference-Cited by-同舟云学术

Gain saturation effects in THz quantum cascade lasers

Published:2022-07-05 Issue:2 Volume:58 Page:237-244
ISSN:2524-2415
Container-title:Proceedings of the National Academy of Sciences of Belarus. Physics and Mathematics Series
language:
Short-container-title:Vescì Akademìì navuk Belarusì. Seryâ fizika-matematyčnyh navuk

Author:

Ushakov D. V.¹,Afonenko A. A.¹,Khabibullin R. A.²,Kononenko V. K.¹,Manak I. S.¹

Affiliation:

1. Belarusian State University

2. V. G. Mokerov Institute of Ultra-high Frequency Semiconductor Electronics of Russian Academy of Sciences

Abstract

The effect of gain saturation in quantum-cascade structures with 2–4 quantum wells per period is herein analyzed on the basis of a system of balance equations. It is shown that the nonlinearity parameter decreases with an increase in the relaxation rate of laser levels, but the total current through the structure also increases. The use of the proposed multiphoton designs leads to a decrease in the non-linearity parameter without increasing the operating current. For example, in a two-photon scheme of laser transitions with the same transition probabilities and differential gains, two times slower saturation of the gain with an increase in the photon density is achieved, which leads to a high generation efficiency than in single-photon schemes.

Publisher

Publishing House Belorusskaya Nauka

Subject

Computational Theory and Mathematics,General Physics and Astronomy,General Mathematics

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