Evanescent-wave fiber reflector

摘要: A tunable optical fiber reflector is described, together with a method of making the same. length has core first light transmitting material, and cladding second material covering core. The etched away to predetermined thickness over portion fiber. layer photoresist applied either or thin metal blade, i.e., mask, then exposed beams which optically interfere generate standing wave pattern in said material. developed fix therein. An discontinuity formed one by that fixed pattern, representing quasi-periodical fluctuation refractive index causing evanescent waves be reflected. Such forms distributed-feedback reflector. In method, bombarded under vacuum beam ions passed through openings having thus producing fluctuations More preferably, coated on fiber, counter-propagating are coupled into opposite ends These expose therein as residual quantities typically filled reinforcing such an epoxy. Two reflectors make up resonator, several resonators can used hydrophone line-array.