Back to results
US 2002/0172252 A1Published application
Semiconductor laser module
AssigneeNEC Corporation
InventorsMasahiko Namiwaka, Masahiro Kanda
Life of this patent
Estimating the term…
Abstract
Fiber gratings (5), (6) having substantially the same reflection center wavelength are provided in an optical fiber (4). The fiber gratings (5), (6) reflects to the semiconductor laser element (1), only a component at the reflection center wavelength of laser light emitted from the semiconductor laser element (1).
Claims4
A semiconductor laser module comprising:
- a semiconductor laser element;
- an optical fiber optically coupled to said semiconductor laser element;
- and
- a plurality of fiber gratings provided in said optical fiber;
- wherein a center wavelength of a reflecting light of said fiber gratings is established to be substantially equal each other.
2 more elements
A semiconductor laser module comprising:
- a semiconductor laser element;
- an optical fiber optically coupled to said semiconductor laser element;
- and
- a plurality of fiber gratings provided in said optical fiber;
- wherein a center wavelength of a reflecting light of said fiber gratings is established to be equal each other.
2 more elements
Dependencies are inferred from the claim text.