G - Physics – 01 – M
Patent
G - Physics
01
M
G01M 11/00 (2006.01) H01S 5/14 (2006.01) H04B 10/08 (2006.01) H01S 5/062 (2006.01) H01S 5/0683 (2006.01) H01S 5/12 (2006.01)
Patent
CA 2186545
The pulse laser light source apparatus in the OTDR apparatus of present invention comprises an optical waveguide which receives and guides the light emitted from the first light-emitting end face, wherein the optical waveguide comprises a reflecting area which selectively reflects a part of light emitted from a light-emitting end face of a semiconductor light- emitting device, a core of the reflecting area comprises a first diffraction grating which is disposed in a first area and whose refractive index periodically changes along an optical-axis direction, the first diffraction grating selectively reflects, of the light emitted from the light-emitting end face of the semiconductor light-emitting device, a part of the light within a first wavelength range. And the diffraction grating is one of denvices which constitute a laser resonator.
Inoue Akira
Shigehara Masakazu
Marks & Clerk
Sumitomo Electric Industries Ltd.
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