DFB laser assembly and laser module
AssigneeFurukawa Electric Co., Ltd.
InventorsMasaki Funabashi, Ryosuke Yatsu, Akihiko Kasukawa
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Abstract
A DFB laser assembly including both a DFB laser device, with a buried heterostructure having a cavity length of 400 μm, a differential resistance of 4Ω, an emission wavelength of 1550 nm, and a thermal resistance of 50K/watt or less, and a heat sink mounting the DFB laser device in a junction-down structure so that the DFB laser device has a wavelength/current coefficient at 5 picometers/milli-ampere or less.
Claims40
A distributed feedback semiconductor laser assembly (DFB laser assembly) comprising:
- a heat sink;
- and
- a DFB laser device mounted on said heat sink, wherein said DFB laser device is configured to maintain a ratio of a variation in an emission wavelength to a variation in an injection current less than or equal to 5 pm/mA.
A laser module, comprising:
- a DFB laser assembly comprising,
- a heat sink;
- and
- a DFB laser device mounted on said heat sink, wherein said DFB laser device is configured to maintain a ratio of a variation in an emission wavelength and
- a variation in an injection current less than or equal to 5 pm/mA;
- and
- an optical system configured to optically couple the DFB laser assembly to an optical fiber.
A distributed feedback semiconductor laser assembly (DFB laser assembly) comprising:
- a heat sink;
- a DFB laser device mounted on said heat sink, wherein said DFB laser device is configured to maintain a ratio of a variation in an emission wavelength and a variation in an injection current less than or equal to 4 pm/mA.
A laser module comprising:
- a DFB laser assembly comprising:
- a heat sink;
- and
- a DFB laser device mounted on said heat sink, wherein said DFB laser device is configured to maintain a ratio of a variation in an emission wavelength and a variation in an injection current less than or equal to 4 pm/mA;
- and
- an optical system configured to optically couple the DFB laser assembly to an optical fiber.
A distributed feedback semiconductor laser assembly (DFB laser assembly) comprising:
- a heat sink;
- and
- a DFB laser device mounted on said heat sink, wherein said DFB laser device is configured to maintain a ratio of a variation in an emission wavelength and a variation in an injection current less than or equal to 3 pm/mA.
A laser module comprising:
- a DFB laser assembly comprising:
- a heat sink;
- and
- a DFB laser device mounted on said heat sink, wherein said DFB laser device is configured to maintain a ratio of a variation in an emission wavelength and a variation in an injection current less than or equal to 3 pm/mA;
- and
- an optical system configured to optically couple the DFB laser assembly to an optical fiber.
A distributed feedback semiconductor laser assembly (DFB laser assembly) comprising:
- a heat sink;
- and
- a DFB laser device mounted on said heat sink, wherein said DFB laser device is configured to maintain a ratio of a variation in an emission wavelength and a variation in an injection current less than or equal to 2 pm/mA.
A laser module comprising:
- a DFB laser assembly comprising:
- a heat sink;
- and
- a DFB laser device mounted on said heat sink, wherein said DFB laser device is configured to maintain a ratio of a variation in an emission wavelength and a variation in an injection current less than or equal to 2 pm/mA;
- and
- an optical system configured to optically couple the DFB laser assembly to an optical fiber.
Dependencies are inferred from the claim text.