Optical waveguides – With optical coupler – Input/output coupler
Patent
1998-09-10
2000-08-08
Palmer, Phan H.
Optical waveguides
With optical coupler
Input/output coupler
385 14, 385 40, 385130, 385131, G02B 634
Patent
active
061013021
ABSTRACT:
The present invention relates to an optical filter for selecting a wavelength to be used in an optical communication and optical switching equipment and, more particularly, to an optical filter in order to reduce a sidelobe deteriorating its characteristics. The optical filter according to the present invention includes a plurality of pair gratings formed in a cladding layer, wherein a period of the grating pairs is constant throughout the optical filter, wherein the pair gratings are divided into two unit gratings, and wherein intervals between unit grating within pair grating are spatially different.
REFERENCES:
patent: 5396365 (1995-03-01), Gustavsson
patent: 5515461 (1996-05-01), Deri et al.
patent: 5615008 (1997-03-01), Stachelek
patent: 5621828 (1997-04-01), Baets et al.
patent: 5764831 (1998-06-01), Lauzon
patent: 5883990 (1999-03-01), Sasaoka et al.
patent: 5940568 (1999-08-01), Losch
Kim Dug Bong
Kim Jeong Soo
Lee Seung Won
Park Chan Yong
Electronics and Telecommunications Research Institute
Korea & Telecom
Palmer Phan H.
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