Coherent light generators – Particular resonant cavity – Folded cavity
Reexamination Certificate
2009-05-13
2010-11-30
Harvey, Minsun (Department: 2828)
Coherent light generators
Particular resonant cavity
Folded cavity
C385S039000
Reexamination Certificate
active
07843986
ABSTRACT:
To prevent the property of an optical filter from being changed even if there is a change in a gap of directional couplers generated due to variations in manufacturing conditions so as to improve the yield. A tunable laser device includes a PLC and an SOA. The PLC includes: optical waveguides; an optical filter; a loop mirror; thin-film heaters; and asymmetrical MZIs. Optical coupling parts within the PLC are formed with the asymmetrical MZIs, so that there is no change generated in the property of the optical filter even if there is a change generated in a gap of the directional couplers due to variations in the manufacturing conditions. Therefore, the yield can be improved.
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Harvey Minsun
NEC Corporation
Nguyen Tuan N.
LandOfFree
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