An efficient LP01 to LP11 modal coupler using periodic microbends, spaced by a beat length between the modes, was built and tested. The optical-wavelength dependence of the device is investigated, as are the polarization characteristics and the LP mode approximation. Finally, the loss of the modal coupler was measured as a function of wavelength.
© 1986 Optical Society of America
Original Manuscript: October 15, 1985
Manuscript Accepted: December 17, 1985
Published: March 1, 1986
J. N. Blake, B. Y. Kim, and H. J. Shaw, "Fiber-optic modal coupler using periodic microbending," Opt. Lett. 11, 177-179 (1986)