Frequency Stabilization of a Single Mode Terahertz Quantum Cascade Laser to the Kilohertz Level

A simple analog locking circuit was shown to stabilize the beat signal between a 2.408 THz quantum cascade laser and a CH2DOH THz CO2 optically pumped molecular laser to 3-4 kHz (FWHM). This is approximately a tenth of the observed long-term (t sec) linewidth of the optically pumped laser showing th...

Full description

Saved in:
Bibliographic Details
Main Authors: Danylov, Andriy A, Goyette, Thomas M, Waldman, Jerry, Coulombe, Michael J, Gatesman, Andrew J, Giles, Robert H, Goodhue, William D, Qian, Xifeng, Nixon, William E
Format: Report
Language:English
Subjects:
Acoustics
BEAT SIGNALS
CASCADE STRUCTURES
GAS LASERS
LASER PUMPING
Lasers and Masers
MECHANICAL PROPERTIES
OPTICAL PUMPING
QUANTUM OPTICS
QUANTUM THEORY
Quantum Theory and Relativity
REPRINTS
SEMICONDUCTOR LASERS
STABILIZATION
Online Access:Request full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A simple analog locking circuit was shown to stabilize the beat signal between a 2.408 THz quantum cascade laser and a CH2DOH THz CO2 optically pumped molecular laser to 3-4 kHz (FWHM). This is approximately a tenth of the observed long-term (t sec) linewidth of the optically pumped laser showing that the feedback loop corrects for much of the mechanical and acoustic-induced frequency jitter of the gas laser. The achieved stability should be sufficient to enable the use of THz quantum cascade lasers as transmitters in short-range coherent transceivers. Published in Optics Express, v17 n9, 27 April 2009.