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

English Title

Coherent injection locking of quantum cascade laser frequency combs

Type

journal article in Web of Science

Language

en

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.

English 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

Released

01.02.2019

Pages from

101

Pages to

104

Pages count

5

URL

Documents

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",
  annote="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.",
  chapter="152185",
  doi="10.1038/s41566-018-0320-3",
  howpublished="print",
  number="2",
  volume="13",
  year="2019",
  month="february",
  pages="101--104",
  type="journal article in Web of Science"
}