The single-mode linewidth of an erbium-doped, single-frequency, fiber ring laser has been measured by using a newly developed loss-compensated delayed self-heterodyne interferometer that has a resolution of less than 600 Hz. The natural linewidth is determined to have an upper bound of less than 2 kHz. In addition, frequency jitter was found to be dominant over the natural linewidth, yielding an effective linewidth of approximately 4 kHz.
© 1992 Optical Society of America
Original Manuscript: May 15, 1992
Published: September 15, 1992
Namkyoo Park, Jay W. Dawson, and Kerry J. Vahala, "Linewidth and frequency jitter measurement of an erbium-doped fiber ring laser by using a loss-compensated, delayed self-heterodyne interferometer," Opt. Lett. 17, 1274-1276 (1992)