Coherent Optical Generation of a 6 GHz Microwave Signal with Directly Phase Locked Semiconductor DFB Lasers

Ulrik Bo Gliese, Torben Nørskov Nielsen, Marlene Bruun, Erik Lintz Christensen, Kristian Stubkjær, S. Lindgren, B. Broberg

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

315 Downloads (Pure)


Experimental results of a wideband heterodyne second order optical phase locked loop with 1.5 ¿m semiconductor lasers are presented. The loop has a bandwidth of 180 MHz, a gain of 181 dBHz and a propagation delay of only 400 ps. A beat signal of 8 MHz linewidth is phase locked to become a replica of a microwave reference source close to carrier with a noise level of ¿125 dBc/Hz. The total phase variance of the locked carrier is 0.04 rad2 and carriers can be generated in a continuous range from 3 to 18 GHz. The loop reliability is excellent with an average time to cycle slip of 1011 seconds and an acquisition range of 640 MHz.
Original languageEnglish
Title of host publicationProceedings of the 22nd European Microwave Conference
VolumeVolume 2
Publication date1992
Publication statusPublished - 1992
Event22nd European Microwave Conference - Helsinki, Finland
Duration: 5 Sep 19929 Sep 1992
Conference number: 22


Conference22nd European Microwave Conference
Internet address

Bibliographical note

Copyright: 1992 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE


Dive into the research topics of 'Coherent Optical Generation of a 6 GHz Microwave Signal with Directly Phase Locked Semiconductor DFB Lasers'. Together they form a unique fingerprint.

Cite this