Optical noise properties of mutually coupled quantum cascade lasers

被引：0
作者：
Zhou, Xiang-Yu [1 ,2 ,3 ]
Wang, Xing-Guang [1 ]
Zhao, Bin-Bin [1 ]
Wang, Cheng [1 ]
机构：
[1] ShanghaiTech Univ, Sch Informat Sci & Technol, Shanghai 201210, Peoples R China
[2] Shanghai Inst Microsyst & Informat Technol, Shanghai 200050, Peoples R China
[3] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
来源：
PHYSICS AND SIMULATION OF OPTOELECTRONIC DEVICES XXIX | 2021年 / 11680卷
基金：
中国国家自然科学基金;
关键词：
Quantum cascade lasers; relative intensity noise; frequency noise; spectral linewidth; mutual injection; FREQUENCY NOISE; SYNCHRONIZATION; MODULATION; LOCKING;
D O I：
10.1117/12.2576851
中图分类号：
TP18 [人工智能理论];
学科分类号：
081104 ; 0812 ; 0835 ; 1405 ;
摘要：
This work theoretically investigates the optical noise characteristics of mutually-coupled quantum cascade lasers, which is achieved through the small-signal analysis of a set of rate equations with Langevin noise sources. It is shown that the stable locking range of the mutually-coupled lasers is on the order of several GHz. Within the stable locking range, the inphase mutual injection hardly changes the relative intensity noise of the lasers. In contrast, the frequency noise and the spectral linewidth of the coupled lasers can be reduced by about 10 dB.
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页数：7
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