Experimental and theoretical investigation of a nonlinear response of a two-mode fiber interferometer to axial strain is described. It is discovered that the nonlinearity dramatically increases as the wavelength approaches the cutoff wavelength of the second-order mode (LP11).
© 1996 Optical Society of America
Bong Kyu Kim, Seok Hyun Yun, In Kag Hwang, and Byoung Yoon Kim, "Nonlinear strain response of two-mode fiber-optic interferometer," Opt. Lett. 21, 934-936 (1996)