We report broadening in spectrum as light is backreflected from a propagating fiber fuse. The formation of micrometer-size voids results in periodic changes in Fresnel reflection occurring in the leading part of the fuse. High-resolution measurement of the optical spectrum via heterodyne detection revealed an upshift (Doppler shift) in the optical frequency and discrete frequency components that are characteristic of amplitude modulation due to periodic void formation.
© 2009 Optical Society of America
Fiber Optics and Optical Communications
Original Manuscript: July 15, 2009
Revised Manuscript: August 30, 2009
Manuscript Accepted: September 10, 2009
Published: October 9, 2009
Kazi S. Abedin, Tetsuya Miyazaki, and Masataka Nakazawa, "Measurements of spectral broadening and Doppler shift of backreflections from a fiber fuse using heterodyne detection," Opt. Lett. 34, 3157-3159 (2009)