Optical fiber evanescent grating reflector

Details Optical fiber evanescent grating reflector Optical fiber evanescent grating reflector

1988-01-20

1991-01-22

Gonzalez, Frank

35016223, G02B 634

Patent

active

049866249

ABSTRACT:
A periodic grating structure is placed on a facing surface formed on an optical fiber so that the grating structure is within a portion of the evanescent field of an optical signal propagating through the optical fiber. The spatial periodicity of the grating structure is selected to be equal to one-half the propagation wavelength of the optical signal. The grating structure causes the optical signal to be reflected at an angle of 180 degress and thus to propagate in a reverse direction from its original direction of propagation.

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