All-optical Internodal Switching in Two-mode Waveguide

이중모드 광섬유내에서의 전 광(All-optical) 모드 변환 스위칭

An intermodal switch based on optically-induced (through optical Kerr effect) periodic coupling in a two-mode waveguide is described and demonstrated. A high power pump beam injected into the two modes of the waveguide produced a periodic modulation of the refractive index profile with a period of modal beat length. this causes an intermodal coupling of the prove beam. The operating principle was successfully demonstrated in an elliptical core two-mode fiber with a counter-propagating pump-probe scheme.