Coherent light generators – Particular active media – Semiconductor
Reexamination Certificate
2007-06-05
2007-06-05
Rodriguez, Armando (Department: 2828)
Coherent light generators
Particular active media
Semiconductor
C372S064000, C372S102000
Reexamination Certificate
active
11140022
ABSTRACT:
A grating-stabilized semiconductor laser comprises a semiconductor laser gain medium, an integrated low-index waveguide, and a waveguide grating segment providing optical feedback for laser oscillation. The laser may be adapted for multi-mode or single-mode operation. A multiple-mode laser may oscillate with reduced power and/or wavelength fluctuations associated with longitudinal mode wavelength shifts, relative to Fabry-Perot lasers lacking gratings. A single-mode laser may include a compensator, wavelength reference, and detector for generating an error signal, and a feedback mechanism for controlling the compensator for maintaining the laser wavelength locked to the reference. The laser may include means for altering, enhancing, tuning, and/or stabilizing the waveguide grating reflectivity spectral profile. The laser may be adapted for optical transverse-coupling to another waveguide.
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Blauvelt Henry A.
Paslaski Joel S.
Vernooy David W.
Alavi David S.
Christie Parker & Hale LLP
Rodriguez Armando
Xponent Photonics Inc.
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