LINEWIDTH NARROWING OF A DFB DIODE LASER USING A FIBER MACH-ZEHNDER INTERFEROMETER

Won-Kyu Lee, Chang Yong Park, Jongchul Mun, Dai-Hyuk Yu, Sang Eon Park, Sang-Bum Lee, Taeg Yong Kwon

Abstract

The linewidth reduction from 3 MHz to 15 kHz was achieved with an 1156 nm DFB diode laser in a simple setup using an all-fiber Mach-Zehnder interferometer (MZI) with 5-m-long path imbalance. This result was achieved with no acoustic and vibration isolations. In addition, this result can be applied to any wavelength due to the commercial availability of DFB diode lasers and fiberoptic components in a wide wavelength range. The frequency lock was so robust that it could be maintained over weeks. Since a short fiber patch cord was adopted, optical power loss during the fiber transmission and bandwidth limitation due to the fiber delay were negligible.

Keywords

linewidth, DFB diode laser, fiber interferometer, path imbalance

Download

IMEKO-WC-2012-TC2-O10.pdf

DOI

-

IMEKO TC

TC2 - Photonics

Back to the proceedings