Taper shapes for flatband response and sidelobe suppression in g

Details Taper shapes for flatband response and sidelobe suppression in g Taper shapes for flatband response and sidelobe suppression in g

1995-11-01

1998-01-20

Bovernick, Rodney B.

Optical waveguides

With optical coupler

Particular coupling structure

385 37, 385129, 385 27, 385 43, G02B 626

Patent

active

057108498

ABSTRACT:
Improvements in grating-assisted optical filter couplers are described. In particularly, taper shapes for the gratings-assisted codirectional couplers are determined to provide an out-of-band sidelobe suppression ratio of greater than -30 dB, and a passband response that is flat and has a transmission of greater than 99.55% of the transmission at the passband center, over a wavelength range of 25% of the half-power bandwidth.
The interaction strength defining the optimized spectral characteristics is given by

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