13 GHz direct modulation of terahertz quantum cascade lasers

被引：92
作者：
Barbieri, Stefano
Maineult, Wilfried
Dhillon, Sukhdeep S.
Sirtori, Carlo
Alton, Jesse
Breuil, Nicolas
Beere, Harvey E.
Ritchie, David A.
机构：
[1] Univ Paris 07, F-75205 Paris, France
[2] TeraView Ltd, Cambridge CB4 0WS, England
[3] Thales Airborne Syst, F-78851 Enancourt, France
[4] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England
来源：
APPLIED PHYSICS LETTERS | 2007年 / 91卷 / 14期
基金：
英国工程与自然科学研究理事会;
关键词：
D O I：
10.1063/1.2790827
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
By directly modulating the bias voltage of a double-metal waveguide, 2.8 THz quantum cascade laser, we observe the appearance of multiple gigahertz sidebands in the emission spectrum, with a spacing that can be continuously tuned up to 13 GHz. By using an upconversion technique, the terahertz spectrum is shifted at 1.57 mu m, and displayed on an optical spectrum analyzer. A marked increase in the number of sidebands is observed when the modulation frequency approaches the round-trip frequency (similar to 12.3 GHz). The laser packaging high frequency response has been measured using a microwave rectification technique, and is limited by the bond-wire parasitic inductance. (c) 2007 American Institute of Physics.
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页数：3
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