A novel method for measuring the linewidth of each laser and channel spacing in a multichannel transmission system is presented. Using the dependence of the Stokes frequency shift on the pump wavelength in stimulated Brillouin scattering, we are able to construct a delayed self-heterodyne interferometer that can measure the linewidths and channel spacing simultaneously.
© 1998 Optical Society of America
G. Y. Lyu, S. S. Lee, D. H. Lee, C. S. Park, M. H. Kang, and K. Cho, "Simultaneous measurement of multichannel laser linewidths and spacing by use of stimulated Brillouin scattering in optical fiber," Opt. Lett. 23, 873-875 (1998)