Publication detail

Coherent injection locking of quantum cascade laser frequency combs

HILLBRAND, J. ANDREWS, A. DETZ, H. STRASSER, G. SCHWARZ, B.

Original Title

Coherent injection locking of quantum cascade laser frequency combs

Type

journal article in Web of Science

Language

English

Original Abstract

Quantum cascade laser (QCL) frequency combs are a promising candidate for chemical sensing and biomedical diagnostics1– 4. They are electrically pumped and compact, making them an ideal platform for on-chip integration5. Until now, optical feedback is fatal for frequency comb generation in QCLs6. This property limits the potential for integration. Here, we demonstrate coherent electrical injection locking of the repetition frequency to a stabilized radio-frequency oscillator. We prove that the injection-locked QCL spectrum can be phase-locked, resulting in the generation of a frequency comb. We show that injection locking is not only a versatile tool for all-electrical frequency stabilization, but also mitigates the fatal effect of optical feedback. A prototype self-detected dual-comb set-up consisting only of an injection-locked dual-comb chip, a lens and a mirror demonstrates the enormous potential for on-chip dual-comb spectroscopy. These results pave the way to miniaturized and all-solid-state mid-infrared spectrometers.

Keywords

Chemical sensors, Laser diagnostics, Optical feedback, Spectrometers

Authors

HILLBRAND, J.; ANDREWS, A.; DETZ, H.; STRASSER, G.; SCHWARZ, B.

Released

1. 2. 2019

ISBN

1749-4885

Periodical

Nature Photonics

Year of study

13

Number

2

State

United Kingdom of Great Britain and Northern Ireland

Pages from

101

Pages to

104

Pages count

5

URL

https://arxiv.org/abs/1808.06636

BibTex

@article{BUT152185,
  author="Johannes David {Hillbrand} and Aaron Maxwell {Andrews} and Hermann {Detz} and Gottfried {Strasser} and Benedikt {Schwarz}",
  title="Coherent injection locking of quantum cascade laser frequency combs",
  journal="Nature Photonics",
  year="2019",
  volume="13",
  number="2",
  pages="101--104",
  doi="10.1038/s41566-018-0320-3",
  issn="1749-4885",
  url="https://arxiv.org/abs/1808.06636"
}