Two types of supermode noise spurs, uncorrelated and correlated, are measured for two different types of harmonically mode-locked lasers utilizing a dual grating pulse shaper as a means to determine the correlation. The correlated supermode noise spur, as measured with the residual phase noise technique, is related to the excitation of multiple correlated optical supermodes in the spectral domain and has a large impact on the noise behavior of optical pulse trains after propagation through a long optical fiber.
© 2007 Optical Society of America
Lasers and Laser Optics
Original Manuscript: June 22, 2006
Revised Manuscript: March 5, 2007
Manuscript Accepted: April 12, 2007
Published: June 15, 2007
Sangyoun Gee, Franklyn Quinlan, Sarper Ozharar, and Peter J. Delfyett, "Correlation of supermode noise of harmonically mode-locked lasers," J. Opt. Soc. Am. B 24, 1490-1497 (2007)