elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Privacy Policy | Contact | Deutsch
Fontsize: [-] Text [+]

Frequency and power stabilization of a terahertz quantum-cascade laser using near-infrared optical excitation

Alam, Tasmim and Wienold, Martin and Lü, Xiang and Biermann, Klaus and Schrottke, Lutz and Grahn, Holger T. and Hübers, Heinz-Wilhelm (2019) Frequency and power stabilization of a terahertz quantum-cascade laser using near-infrared optical excitation. Optics Express. Optical Society of America. DOI: 10.1364/OE.27.036846 ISSN 1094-4087

[img] PDF - Published version
3MB

Abstract

We demonstrate a technique to simultaneously stabilize the frequency and output power of a terahertz quantum-cascade laser (QCL). This technique exploits frequency and power variations upon near-infrared illumination of the QCL with a diode laser. It does not require an external terahertz optical modulator. By locking the frequency to a molecular absorption line, we obtain a long-term (one-hour) linewidth of 260 kHz (full width at half maximum) and a root-mean-square power stability below 0.03%. With respect to the free-running case, this stabilization scheme improves the frequency stability by nearly two orders of magnitude and the power stability by a factor of three.

Item URL in elib:https://elib.dlr.de/132690/
Document Type:Article
Title:Frequency and power stabilization of a terahertz quantum-cascade laser using near-infrared optical excitation
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Alam, Tasmimtasmim.alam (at) dlr.deUNSPECIFIED
Wienold, MartinMartin.Wienold (at) dlr.deUNSPECIFIED
Lü, Xianglue (at) pdi-berlin.deUNSPECIFIED
Biermann, Klausbiermann (at) pdi-berlin.deUNSPECIFIED
Schrottke, Lutzlutz (at) pdi-berlin.deUNSPECIFIED
Grahn, Holger T.htgrahn (at) pdi-berlin.deUNSPECIFIED
Hübers, Heinz-WilhelmHeinz-Wilhelm.Huebers (at) dlr.deUNSPECIFIED
Date:4 December 2019
Journal or Publication Title:Optics Express
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
DOI :10.1364/OE.27.036846
Publisher:Optical Society of America
ISSN:1094-4087
Status:Published
Keywords:Stabilization, THz QCL, Modulation spectroscopy
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:other
DLR - Research area:Raumfahrt
DLR - Program:R - no assignment
DLR - Research theme (Project):R - no assignment
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Optical Sensor Systems > Terahertz and Laser Spectroscopy
Deposited By: Alam, Tasmim
Deposited On:08 Jan 2020 08:29
Last Modified:08 Jan 2020 08:29

Repository Staff Only: item control page

Browse
Search
Help & Contact
Information
electronic library is running on EPrints 3.3.12
Copyright © 2008-2017 German Aerospace Center (DLR). All rights reserved.