Widely tunable harmonic frequency comb in a quantum cascade laser

被引：20

作者：

Piccardo, Marco ^{[1
]}

Chevalier, Paul ^{[1
]}

Anand, Sajant ^{[1
,2
]}

Wang, Yongrui ^{[3
]}

Kazakov, Dmitry ^{[1
,4
]}

Mejia, Enrique A. ^{[1
,5
]}

Xie, Feng ^{[6
]}

Lascola, Kevin ^{[6
]}

Belyanin, Alexey ^{[3
]}

Capasso, Federico ^{[1
]}

机构：

[1] Harvard Univ, Harvard John A Paulson Sch Engn & Appl Sci, Cambridge, MA 02138 USA

[2] Wake Forest Univ, Dept Phys, Winston Salem, NC 27109 USA

[3] Texas A&M Univ, Dept Phys & Astron, College Stn, TX 77843 USA

[4] Swiss Fed Inst Technol, Dept Informat Technol & Elect Engn, CH-8092 Zurich, Switzerland

[5] Univ Texas Austin, Austin, TX 78712 USA

[6] TQE, Jessup, MD 20794 USA

来源：

APPLIED PHYSICS LETTERS | 2018年 / 113卷 / 03期

基金：

美国国家科学基金会;

关键词：

MODE; GENERATION;

D O I：

10.1063/1.5039611

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Self-starting harmonic frequency combs in quantum cascade lasers exhibit skipping of several tens of longitudinal modes of the cavity, producing widely spaced frequency combs which may be used for a number of applications, such as the generation of high-spectral-purity microwave and terahertz tones. Under pure electrical injection, the spacing of such combs is fixed by fundamental laser parameters and can hardly be controlled. Here, we demonstrate that harmonic frequency combs in quantum cascade lasers can be induced by optical injection of an external seed provided by a tunable source. This scheme enables wide tunability of the harmonic comb spacing, allowing the skipping between 44 and 171 longitudinal modes in a single device. Published by AIP Publishing.

引用

页数：4

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