Wavelength selective resonant gratings

Details Wavelength selective resonant gratings Wavelength selective resonant gratings

G - Physics

02

B

G02B 5/26 (2006.01) G02B 6/12 (2006.01) G02F 1/21 (2006.01) G02F 1/225 (2006.01) H04J 14/02 (2006.01)

Patent

CA 2287023

A wavelength selective resonant grating exhibits transmission resonances when a single gap between two sections of a split gratings is used to provide a phase shift which is not a quarter wavelength in length or .pi./2 in phase. When the phase is changed to non -.pi./2 values (or the gap differs from a quarter wave), the transmission resonance moves from the center of the stop band. Appropriate adjustments of the phase over a .pi. interval allow tuning of the resonance across the entire stop band. The resonant optical wavelength grating can, illustratively, be used as wavelength filter, wavelength monitor, or as part of an Add/Drop arrangement.

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