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US 6,556,597 B2Granted
Laser diode module
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorsTatsuo Hatta, Kiyohide Sakai
Life of this patent
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Abstract
A laser diode module includes a laser diode, a lens located on an optical path of light emitted from the laser diode, and an optical fiber located to receive the emitted light concentrated by the lens. The optical fiber includes a fiber grating having a reflection center wavelength greater than the cutoff wavelength of the laser diode and having a half-width of reflection spectrum ranging from twice the spacing of longitudinal modes of the laser diode to 10 nm.
Claims8
A laser diode module comprising:
- a laser diode;
- a lens located on an optical path of light emitted from said laser diode;
- and
- an optical fiber located to receive said emitted light concentrated by said lens,
- said optical fiber including a fiber grating,
- said fiber grating having a reflection center wavelength greater than cutoff wavelength of said laser diode, and
- said fiber grating having a half-width of reflection spectrum in a range between twice longitudinal-mode spacing of said laser diode and 10 nm.
4 more elements
A laser diode module comprising:
- a laser diode;
- a lens located on an optical path of light emitted from said laser diode;
- and
- an optical fiber located to receive said emitted light concentrated by said lens,
- said optical fiber including a fiber grating,
- said fiber grating having a reflection center wavelength greater by at least 2 nm than gain peak wavelength of said laser diode, and
- said fiber grating having a half-width of reflection spectrum in a range between twice longitudinal-mode spacing of said laser diode and 10 nm.
4 more elements
Dependencies are inferred from the claim text.