On-chip, self-detected terahertz dual-comb source

被引:69
|
作者
Rosch, Markus [1 ]
Scalari, Giacomo [1 ]
Villares, Gustavo [1 ]
Bosco, Lorenzo [1 ]
Beck, Mattias [1 ]
Faist, Jerome [1 ]
机构
[1] ETH, Inst Quantum Elect, Auguste Piccard Hof 1, CH-8093 Zurich, Switzerland
基金
瑞士国家科学基金会;
关键词
QUANTUM-CASCADE-LASER; TIME-DOMAIN SPECTROSCOPY; FREQUENCY-COMB; EXPLOSIVES; FEEDBACK;
D O I
10.1063/1.4948358
中图分类号
O59 [应用物理学];
学科分类号
摘要
We present a directly generated on-chip dual-comb source at terahertz (THz) frequencies. The multi-heterodyne beating signal of two free-running THz quantum cascade laser frequency combs is measured electrically using one of the combs as a detector, fully exploiting the unique characteristics of quantum cascade active regions. Up to 30 modes can be detected corresponding to a spectral bandwidth of 630 GHz, being the available bandwidth of the dual comb configuration. The multi-heterodyne signal is used to investigate the equidistance of the comb modes showing an accuracy of 10(-12) at the carrier frequency of 2.5 THz. Published by AIP Publishing.
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页数:5
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