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Title: Terahertz multiheterodyne spectroscopy using laser frequency combs

Journal Article · · Optica
 [1];  [1];  [2];  [3];  [4];  [1]
  1. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
  2. SRON Netherlands Institute for Space Research, Groningen (The Netherlands)
  3. SRON Netherlands Institute for Space Research, Groningen (The Netherlands); Delft Univ. of Technology, Delft (The Netherlands)
  4. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

The terahertz region is of great importance for spectroscopy since many molecules have absorption fingerprints there. Frequency combs based on terahertz quantum cascade lasers feature broadband coverage and high output powers in a compact package, making them an attractive option for broadband spectroscopy. Here, we demonstrate the first multiheterodyne spectroscopy using two terahertz quantum cascade laser combs. Over a spectral range of 250 GHz, we achieve average signal-to-noise ratios of 34 dB using cryogenic detectors and 24 dB using room-temperature detectors, all in just 100 μs. As a proof of principle, we use these combs to measure the broadband transmission spectrum of etalon samples and show that, with proper signal processing, it is possible to extend the multiheterodyne spectroscopy to quantum cascade laser combs operating in pulsed mode. As a result, this greatly expands the range of quantum cascade lasers that could be suitable for these techniques and allows for the creation of completely solid-state terahertz laser spectrometers.

Research Organization:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC04-94AL85000
OSTI ID:
1333534
Report Number(s):
SAND-2016-1933J; 619787
Journal Information:
Optica, Vol. 3, Issue 5; ISSN 2334-2536
Publisher:
Optical Society of AmericaCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 86 works
Citation information provided by
Web of Science

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Cited By (32)

Short Terahertz Pulse Generation from a Dispersion Compensated Modelocked Semiconductor Laser journal July 2017
Coupled-Waveguides for Dispersion Compensation in Semiconductor Lasers: Coupled-Waveguides for Dispersion Compensation in Semiconductor Lasers journal March 2018
A III-V-on-Si ultra-dense comb laser journal December 2016
Frequency comb spectroscopy journal February 2019
Dual terahertz comb spectroscopy with a single free-running fibre laser journal July 2018
High efficiency quantum cascade laser frequency comb journal March 2017
Homogeneous spectral spanning of terahertz semiconductor lasers with radio frequency modulation journal March 2017
Shortwave quantum cascade laser frequency comb for multi-heterodyne spectroscopy journal April 2018
Linewidth of the laser optical frequency comb with arbitrary temporal profile journal September 2018
Noise characterization of patch antenna THz photodetectors journal October 2018
High-resolution terahertz spectroscopy with quantum-cascade lasers journal April 2019
On-chip mid-infrared and THz frequency combs for spectroscopy journal April 2019
On-Chip Dual-Comb Source Based on Terahertz Quantum Cascade Lasers Under Microwave Double Injection journal October 2019
Pseudorandom dynamics of frequency combs in free-running quantum cascade lasers journal September 2017
Multiheterodyne spectroscopy using interband cascade lasers journal September 2017
Computational multiheterodyne spectroscopy journal November 2016
Terahertz quantum-cascade lasers as high-power and wideband, gapless sources for spectroscopy journal January 2017
Homogeneous spectral broadening of pulsed terahertz quantum cascade lasers by radio frequency modulation journal January 2018
Temporal characteristics of quantum cascade laser frequency modulated combs in long wave infrared and THz regions journal January 2018
Coexisting frequency combs spaced by an octave in a monolithic quantum cascade laser journal January 2018
Dual-comb spectroscopy using plasmon-enhanced-waveguide dispersion-compensated quantum cascade lasers journal January 2018
Generalized method for the computational phase correction of arbitrary dual comb signals journal January 2019
Dispersion dynamics of quantum cascade lasers journal January 2016
RF Injection of THz QCL Combs at 80 K Emitting over 700 GHz Spectral Bandwidth journal January 2020
RF injection of THz QCL combs at 80 K emitting over 700 GHz spectral bandwidth text January 2020
Coupled-Waveguides for Dispersion Compensation in Semiconductor Lasers text January 2018
Computational multiheterodyne spectroscopy preprint January 2016
Dual terahertz comb spectroscopy with a single free-running fibre laser text January 2018
Computational coherent averaging for free-running dual-comb spectroscopy text January 2018
Linewidth of the Laser Optical Frequency Comb with Arbitrary Temporal Profile text January 2018
Frequency comb spectroscopy text January 2019
On-chip mid-infrared and THz frequency combs for spectroscopy text January 2019


Figures / Tables (4)