Electron dynamics of active mode-locking terahertz quantum cascade laser

doi:10.1088/1674-1056/abc0da

中国物理B ›› 2020, Vol. 29 ›› Issue (12): 127302-.doi: 10.1088/1674-1056/abc0da

收稿日期:2020-07-06 修回日期:2020-09-30 接受日期:2020-10-14 出版日期:2020-12-01 发布日期:2020-11-26

Electron dynamics of active mode-locking terahertz quantum cascade laser

Qiushi Hou(侯秋实)^1,2, Chang Wang(王长)^1,2,†, and Juncheng Cao(曹俊诚)^1,2,‡

¹ Key Laboratory of Terahertz Solid-State Technology, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China; ² Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China

Received:2020-07-06 Revised:2020-09-30 Accepted:2020-10-14 Online:2020-12-01 Published:2020-11-26
Contact: ^†Corresponding author. E-mail: cwang@mail.sim.ac.cn ^‡Corresponding author. E-mail: jccao@mail.sim.ac.cn
Supported by:
Project supported by the National Key Research and Development Program of China (Grant No. 2017YFF0106302), the National Natural Science Foundation of China (Grant Nos. 61975225 and 61927813), and Shanghai International Cooperation Project, China (Grant No. 18590780100).

摘要/Abstract

Abstract: The pulse generation from active mode-locking terahertz quantum cascade laser is studied by Maxwell-Bloch equations. It is shown that longer dephasing time will lead to multiple pulses generation from the laser. The dependence of output field on modulation length and radio-frequency parameters is obtained. In order to achieve short pulse generation, the DC bias should close to threshold value and modulation length should be shorter than 0.256 mm. The output pulse is unstable and the envelope shows many oscillations in the presence of spatial hole burning, resulting destabilization of mode-locking.

Key words: terahertz (THz), quantum cascade lasers (QCLs), mode-locking, spatial hole burning (SHB)

中图分类号: (Theory and modeling)

73.43.Cd

78.30.Fs (III-V and II-VI semiconductors) 42.60.Fc (Modulation, tuning, and mode locking)

. [J]. 中国物理B, 2020, 29(12): 127302-.

Qiushi Hou(侯秋实), Chang Wang(王长), and Juncheng Cao(曹俊诚). Electron dynamics of active mode-locking terahertz quantum cascade laser[J]. Chin. Phys. B, 2020, 29(12): 127302-.

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Electron dynamics of active mode-locking terahertz quantum cascade laser

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