Abstract

Single sideband optical frequency shifters in waveguide form have been pursued for many years for use in fiber-optic systems such as gyroscopes, heterodyned sensors, signal processing, and coherent communications. In this paper, we report a new type of an all-fiber-optic single sideband frequency shifter utilizing periodic optical coupling between two spatial modes in optical fibers, instead of two polarization modes, with the coupling provided by a traveling acoustic wave guided by the optical fiber.

© 1986 Optical Society of America