Heterogeneous terahertz quantum cascade lasers exceeding 1.9 THz spectral bandwidth and featuring dual comb operation

Nanophotonics

article

Markus Rösch¹  Mattias Beck¹  Martin J. Süess¹  Dominic Bachmann²  Karl Unterrainer²  Jérôme Faist¹  Giacomo Scalari¹ 

[1] Institute of Quantum Electronics;Photonics Institute and Center for Micro- and Nanostructures

关键词: terahertz;    frequency comb;    quantum cascade laser;   

DOI  :  10.1515/nanoph-2017-0024

学科分类：社会科学、人文和艺术（综合）

来源: De Gruyter

【 摘 要 】

We report on a heterogeneous active region design for terahertz quantum cascade laser based frequency combs. Dynamic range, spectral bandwidth and output power have been significantly improved with respect to previous designs. When individually operating the lasers, narrow and stable intermode beatnote indicate frequency comb operation up to a spectral bandwidth of 1.1 THz, while in a dispersion-dominated regime a bandwidth up to 1.94 THz at a center frequency of 3 THz can be reached. A self-detected dual-comb setup has been used to verify the frequency comb nature of the lasers.

【 授权许可】

CC BY