Coherent sampling of active mode-locked terahertz quantum cascade lasers and frequency synthesis

被引：0
|
作者：
Barbieri S. [1 ,2 ]
Ravaro M. [1 ,2 ]
Gellie P. [1 ,2 ]
Santarelli G. [3 ]
Manquest C. [1 ,2 ]
Sirtori C. [1 ,2 ]
Khanna S.P. [4 ]
Linfield E.H. [4 ]
Davies A.G. [4 ]
机构：
[1] Laboratoire Matériaux et Phénomè Nes Quantiques, Université Paris 7
[2] CNRS, UMR 7162, 75205 Paris
[3] LNE-SYRTE, CNRS, Observatoire de Paris, 75014 Paris
[4] School of Electronic and Electrical Engineering, University of Leeds
来源：
Nature Photonics | 2011年 / 5卷 / 5期
基金：
欧洲研究理事会; 英国工程与自然科学研究理事会;
关键词：
D O I：
10.1038/nphoton.2011.49
中图分类号：
学科分类号：
摘要：
Terahertz quantum cascade lasers are compact, electrically pumped semiconductor laser sources that are capable of delivering tens of milliwatts of power in continuous wave. Here, we demonstrate that these devices can be operated in a regime of active mode-locking by modulating their bias current with a radiofrequency synthesizer. Detection of the emitted pulse train is made possible by phase-locking the quantum cascade laser repetition rate and carrier frequency to a harmonic of the repetition rate of a mode-locked femtosecond fibre laser. This technique allows coherent sampling of the terahertz electric field, showing that the terahertz pulses are transform-limited. In addition, our technique allows control of the carrier-envelope phase shift of the quantum cascade laser. © 2011 Macmillan Publishers Limited. All rights reserved.
引用
收藏
页码：306 / 313
页数：7
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