| 摘要 |
A wavelength selective resonant grating exhibits transmission resonances when a single gap between two sections of a split gratings is use d 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 sto p 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 monito r, or as part of an Add/Drop arrangement.
|
