Optical waveguides – With optical coupler – Input/output coupler
Reexamination Certificate
2005-11-08
2005-11-08
Ullah, Akm Enayet (Department: 2874)
Optical waveguides
With optical coupler
Input/output coupler
C385S015000, C385S027000, C398S043000, C398S084000, C398S087000, C398S079000
Reexamination Certificate
active
06963684
ABSTRACT:
A planar lightwave circuit generalized for handling any given band of multiple bands of a wavelength range, including a first grating element handling a first group of bands; and a second grating element handling a second group of bands. The first and second groups of bands overlap in the wavelength range, and may be spaced apart by a fixed wavelength value. By providing two periodic grating elements handling alternating bands, their free spectral range is allowed to expand, improving their roll-off characteristics. By providing separate inputs for each band, wavelength accuracy can be improved. Device flexibility can be further improved by using switch and interleaver fabrics at the inputs and outputs. The resultant device, generalized to handle any given band within a wavelength range, eliminates the need for separate component design and inventory tracking otherwise necessary.
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Bhardwaj Jyoti
Dougherty David
Murali Venkatesan
Yamada Hiroaki
Allen Dyer Doppelt Milbrath & Gilchrist, P.A.
JDS Uniphase Corporation
Ullah Akm Enayet
Wood Kevin S.
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