Polarization‐dependent gain and state of polarization effects on linewidth of semiconductor fiber ring lasers

Abstract

Linewidth measurements of a tuneable, high power, narrow linewidth semiconductor fiber ring laser are presented. The laser had a typical output power of 9.72 dBm with a corresponding 170 kHz FWHM and 311 kHz 20‐dB linewidth. We demonstrate experimentally the dependence of laser's linewidth on SOP of the lasing light and polarization‐dependent gain of semiconductor gain medium. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 31–34, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22984