Frequency stabilization of a terahertz quantum-cascade laser to the Lamb dip of a molecular absorption line
Journal article, 2023

We demonstrate the frequency stabilization of a terahertz quantum-cascade laser (QCL) to the Lamb dip of the absorption line of a D2O rotational transition at 3.3809309 THz. To assess the quality of the frequency stabilization, a Schottky diode harmonic mixer is used to generate a downconverted QCL signal by mixing the laser emission with a multiplied microwave reference signal. This downconverted signal is directly measured by a spectrum analyzer showing a full width at half maximum of 350 kHz, which is eventually limited by high-frequency noise beyond the bandwidth of the stabilization loop.

Author

Robert Voigt

German Aerospace Center (DLR)

Martin Wienold

German Aerospace Center (DLR)

Divya Jayasankar

Chalmers, Microtechnology and Nanoscience (MC2), Terahertz and Millimetre Wave Laboratory

Vladimir Drakinskiy

Chalmers, Microtechnology and Nanoscience (MC2), Terahertz and Millimetre Wave Laboratory

Jan Stake

Chalmers, Microtechnology and Nanoscience (MC2), Terahertz and Millimetre Wave Laboratory

Peter Sobis

Chalmers, Microtechnology and Nanoscience (MC2), Terahertz and Millimetre Wave Laboratory

Lutz Schrottke

Paul Drude Institut fur Festkorperelektronik

Xiang Lü

Paul Drude Institut fur Festkorperelektronik

Holger T. Grahn

Paul Drude Institut fur Festkorperelektronik

Heinz-Wilhelm Huebers

German Aerospace Center (DLR)

Optics Express

1094-4087 (ISSN) 10944087 (eISSN)

Vol. 31 9 13888-13894

THz metrology for modern wireless systems

Swedish Foundation for Strategic Research (SSF) (FID17-0040), -- .

Areas of Advance

Information and Communication Technology

Infrastructure

Kollberg Laboratory

Nanofabrication Laboratory

Subject Categories

Electrical Engineering, Electronic Engineering, Information Engineering

Other Electrical Engineering, Electronic Engineering, Information Engineering

DOI

10.1364/OE.483883

PubMed

37157264

More information

Latest update

5/26/2023