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US 2002/0117678 A1Published application
Semiconductor laser module
AssigneeFurukawa Electric Co., Ltd.
InventorsMichio Ohkubo, Yutaka Ohki
Life of this patent
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Abstract
A semiconductor laser module in which an exciting laser beam output is always allowed to be in a multi-mode and the variation of optical output does not occur. In the semiconductor laser module, a semiconductor laser device, light coupling means and an optical fiber are disposed, and further, a light feedback (return) portion where a laser beam of a specific wavelength is reflected is formed, and the reflection spectrum at the light feedback portion has a shape similar to a rectangular one.
Claims14
A semiconductor laser module comprising:
- a semiconductor laser device, an optical fiber, light-coupling means, which causes a laser beam emitted from the said semiconductor laser device to enter said optical fiber, and a light-feedback portion, which reflects a laser beam of a specific wavelength,
- wherein the shape of a reflection spectrum at said light-feedback portion is substantially rectangular.
A semiconductor laser module comprising:
- a semiconductor laser device, an optical fiber, light-coupling means, which causes a laser beam emitted from the said semiconductor laser device to enter said optical fiber, and a light-feedback portion, which reflects a laser beam of a specific wavelength,
- wherein the shape of a reflection spectrum at said light-feedback portion is one in which the top portion has projected and recessed portions.
Dependencies are inferred from the claim text.