Semiconductor laser module, optical measuring method and optical measuring apparatus
First Claim
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1. A semiconductor laser module comprising:
- a semiconductor laser device configured to emit a laser light, the laser light having a center wavelength in an inclusive range of 1300 nm through 1440 nm;
an optical fiber configured to receive and guide the laser light emitted from said semiconductor laser device; and
a package configured to accommodate said semiconductor laser device therein and provide an airtight sealed environment for a light path for the laser light that extends at least from said semiconductor laser device to an incident end of said optical fiber, said optical fiber extending from said package, wherein an amount of moisture in said package is limited to 100000 ppm by volume or less.
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Abstract
A package accommodates an LD device for emitting laser light with the center wavelength of which is in a range of 1300 to 1440 nm and airtight seals a light path extending from the LD device to an incident end of an optical fiber. The package is filled with a nitrogen gas at a standard atmospheric pressure with the amount of moisture limited to a value lower than 100000 ppm by volume or less. Therefore, the amount of moisture in the light path for laser light within the package is limited to 100000 ppm by volume or less.
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Citations
26 Claims
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1. A semiconductor laser module comprising:
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a semiconductor laser device configured to emit a laser light, the laser light having a center wavelength in an inclusive range of 1300 nm through 1440 nm;
an optical fiber configured to receive and guide the laser light emitted from said semiconductor laser device; and
a package configured to accommodate said semiconductor laser device therein and provide an airtight sealed environment for a light path for the laser light that extends at least from said semiconductor laser device to an incident end of said optical fiber, said optical fiber extending from said package, wherein an amount of moisture in said package is limited to 100000 ppm by volume or less. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An optical measuring method comprising steps of:
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limiting an amount of moisture in a light path for a laser light to 100000 ppm by volume or less;
emitting said laser light from an output end of an optical fiber to said light path, said laser light having a center wavelength in an inclusive range of 1300 nm through 1440 nm; and
measuring a characteristic of the laser light when the laser light travels in the light path. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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19. An optical measuring apparatus comprising:
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a measuring device configured to receive laser light with a center wavelength in an inclusive range of 1300 nm through 1440 nm, emitted from an output end of an optical fiber, and configured to measure a characteristic of said laser light while said laser light travels along a light path; and
a main container configured to accommodate said measuring device therein and provide and airtight sealed environment for at least a spatial propagation path portion of said light path for said laser light that extends from the output end of said optical fiber to said measuring device, wherein an amount of moisture in said main container is limited to 100000 ppm by volume or less. - View Dependent Claims (20, 21, 22, 23, 24)
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25. An optical measuring apparatus comprising:
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a measuring device configured to receive and measure a characteristic of a laser light with a center wavelength in an inclusive range of 1300 nm through 1440 nm that is emitted from an output end of an optical fiber; and
a light path for said laser light being in a form of an optical fiber based optical element, said light path extending from an output end of said optical fiber to said measuring device. - View Dependent Claims (26)
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Specification