High frequency modulation and injection locking of terahertz quantum cascade lasers

被引：3
作者：
Gu, L. [1 ]
Wan, W. J. [1 ]
Zhu, Y. H. [1 ]
Fu, Z. L. [1 ]
Li, H. [1 ]
Cao, J. C. [1 ]
机构：
[1] Chinese Acad Sci, Shanghai Inst Microsyst & Informat Technol, Key Lab Terahertz Solid State Technol, 865 Changning Rd, Shanghai 200050, Peoples R China
来源：
JOURNAL OF OPTICS | 2017年 / 19卷 / 06期
基金：
中国国家自然科学基金;
关键词：
terahertz; quantum cascade laser; S-parameters; injection locking; CONTINUOUS-WAVE; MU-M; OPERATION; POWER; THZ;
D O I：
10.1088/2040-8986/aa6e83
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Due to intersubband transitions, the quantum cascade laser (QCL) is free of relaxations and able to work under fast modulations. In this work, the authors investigate the fast modulation properties of a continuous wave (cw) terahertz QCL emitting around 3 THz (similar to 100 mu m). Both simulation and experimental results show that the 3 dB modulation bandwidth for the device can reach 11.5 GHz and the modulation response curve is relatively flat upto similar to 16 GHz. The radio frequency (RF) injection measurements verify that around the laser threshold the inter-mode beat note interacts strongly with the RF signal and the laser can be modulated at the round trip frequency of 15.5 GHz.
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页数：7
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