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filingDate 2002-01-25-04:00^^<http://www.w3.org/2001/XMLSchema#date>
inventor http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_536320fa4fb6ca6aa1b204c8098d752d
publicationDate 2002-08-08-04:00^^<http://www.w3.org/2001/XMLSchema#date>
publicationNumber US-2002105998-A1
titleOfInvention Ring resonator based narrow-linewidth semiconductor lasers
abstract The present invention is a method and apparatus for using ring resonators to produce narrow linewidth hybrid semiconductor lasers. According to one embodiment of the present invention, the narrow linewidths are produced by combining the semiconductor gain chip with a narrow pass band external feedback element. The semi conductor laser is produced using a ring resonator which, combined with a Bragg grating, acts as the external feedback element. According to another embodiment of the present invention, the proposed integrated optics ring resonator is based on plasma enhanced chemical vapor deposition (PECVD) SiO 2 /SiON/SiO 2 waveguide technology.
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