Narrow-band wavelength selective optical coupler

Details Narrow-band wavelength selective optical coupler Narrow-band wavelength selective optical coupler

G - Physics

02

B

88/97.5

G02B 6/34 (2006.01) G02B 6/28 (2006.01)

Patent

CA 1288983

NARROW-BAND WAVELENGTH SELECTIVE OPTICAL COUPLER Abstract Narrow band, wavelength selective optical coupling is achieved in a device including first and second optical transmission media and a filter. The first and second optical transmission media are in substantially close proximityof each other in a predetermined interaction region to provide evanescent coupling therebetween. The filter is positioned on the first optical transmission medium in the predetermined region for causing the coupling to be wavelength selective and contradirectional from the first optical transmission means to thesecond optical transmission means. One exemplary embodiment of the coupler includes optical fibers as the transmission media and a Bragg reflection grating integrally formed on the firsttransmission medium as the filter. Other embodiments include the use of semiconductor waveguides as the optical transmission media.

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