IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0193232
(2002-07-12)
|
우선권정보 |
JP-0137457 (2002-05-13); JP-0224911 (2001-07-25) |
발명자
/ 주소 |
- Tsunetomo, Kohei
- Tsukiji, Naoki
- Yoshida, Junji
- Hayamizu, Naoki
- Koseki, Takashi
|
출원인 / 주소 |
- The Furukawa Electric Co., Ltd.
|
대리인 / 주소 |
Oblon, Spivak, McClelland, Maier &
|
인용정보 |
피인용 횟수 :
6 인용 특허 :
17 |
초록
▼
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 p
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.
대표청구항
▼
1. A semiconductor laser module comprising:a semiconductor laser device configured to emit a laser light, 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 in a first
1. A semiconductor laser module comprising:a semiconductor laser device configured to emit a laser light, 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 in a first space of said laser module and to provide an end of said optical fiber in a second space of said laser module sealed from said first space such that an airtight sealed environment for a light path for the laser light that extends at least from said semiconductor laser device in said first space to an incident end of said optical fiber in said second space, said optical fiber extending from said package, wherein an amount of moisture in said second space is limited to 100000 ppm by volume or less. 2. The module according to claim 1, further comprising:an optical element disposed in said light path within said package, wherein a total of the amount of moisture in said package and an amount of moisture contained in said optical element is limited to 100000 ppm by volume or less. 3. The module according to claim 1, further comprising:a getter disposed in said package and configured to absorb moisture. 4. The module according to claim 1, wherein:said package includes an opening portion through which said optical fiber is inserted; and a seal configured to hermetically seal a gap between said optical fiber and an inner wall of the opening portion of said package. 5. The module according to claim 4, wherein said seal includes at least one of an adhesive and a resin that closes the gap.6. The module according to claim 4, wherein said seal includes solder that closes the gap.7. The module according to claim 4, wherein said seal includes a seam that closes the gap, said seam being a laser welded seam.8. The module according to claim 4, wherein said seal includes a covering member for airtight sealing a region between said optical fiber and said package.9. The module according to claim 1, wherein:said package includes an opening portion through which said optical fiber is inserted; and sealing means for hermetically sealing a gap between said optical fiber and an inner wall of the opening portion of said package. 10. The module according to claim 9, wherein said sealing means includes means for airtight sealing a region between said optical fiber and said package.11.The module according to claim 1, further comprising a window configured to hermetically seal said semiconductor laser device whithin said first space and to allow the laser light to pass therethrough,wherein said potical fiber end is disposed within said second space on an opposite side to said simiconductor laser device with respect to said window with a space between said window and said optical fiber being hermetically sealed. 12. The semincondutor laser module of claim 1, wherein the semiconductor laser device is configured to emit a laser light having a center wavelenghth in an inclusive range of 1300 nm through 1400 nm.13. An optical measuring method comprising steps of:limiting an amount of moisture in a package containing 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, the input of the optical fiber being connected to a laser device; and measuring a characteristic of the laser light when the laser light exits said output end and travels in the light path. 14. The method according to claim 13, wherein:said emitting step includes emitting said laser light through an optical element disposed in said light path within said package; and said limiting step includes limiting a total of the amount of moisture in said package and an amount of moisture contained in said optical element to 100000 ppm by volume or less. 15. The method according to claim 13, wherein:said limiting step includes absorbing said moisture with a getter disposed in said package. 16. The method according to claim 13, wherein:said limiting step includes hermetically sealing a gap between said optical fiber and an inner wall of an opening portion formed in a wall of said package and through which said optical fiber is inserted. 17. The method according to claim 16, wherein said hermetically sealing step includes closing the gap with at least one of an adhesive and a resin.18. The method according to claim 16, wherein said hermetically sealing step includes closing the gap with solder.19. The method according to claim 16, wherein said hermetically sealing step includes laser welding a seam so as to close said gap.20. The method according to claim 16, wherein said hermetically sealing step includes applying a covering so as to airtightly seal a region between said optical fiber and said package.21. The optical measuring method of claim 13, wherein said emitting comprises emitting laser light having a center wavelength in an inclusive range of 1300 nm through 1440 nm.22. An optical measuring apparatus comprising:a measuring device configured to receive laser light, emitted from an output end of an optical fiber the input which is connected to a laser device, to measure a characteristic of said laser light, said laser light traveling along a light path; and a main container configured to accommodate said measuring device therein and provide an 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. 23. The apparatus according to claim 22, further comprising:an optical element disposed in said light path within said main container, said optical element having an internal spatial propagation path. 24. The apparatus according to claim 23, wherein:said main container includes a first chamber that accommodates said measuring device, and a second chamber that accommodates said optical element, said second chamber comprises an inlet/outlet port configured to introduce said optical fiber and a semiconductor laser module that emits said laser light to said optical fiber into said second chamber, said inlet/output port is configured to remain airtightly closed when said optical fiber and said semiconductor laser module are in said second chamber. 25. The apparatus according to claim 22, wherein:said main container comprises an inlet/outlet port configured to introduce said optical fiber and a semiconductor laser module configured to emit said laser light to said optical fiber therein; said inlet/outlet port being configured to remain airtightly closed wherein said optical fiber and said semiconductor laser module are in said main container. 26. The apparatus according to claim 22, wherein said apparatus further comprises:a sub container including a transfer port configured to connect said sub container to said main container; and an inlet/outlet port configured to introduce into said sub container said optical fiber and a semiconductor laser module that emits said laser light to said optical fiber, wherein said inlet/output port and said transfer being configured to remain airtightly closed when said optical fiber and said semiconductor laser module are into said sub container, said optical fiber and said semiconductor laser module are accommodated in said sub container with an amount of moisture in said sub container being limited to 100000 ppm by volume or less. 27. The apparatus according to claim 22, wherein said main container comprises an optical connection configured to removably connect the output end of said optical fiber from outside of said main container.28. The optical measuring apparatus of claim 22, wherein said measuring device is configured to receive laser light with a center wavelength in an inclusive range of 1300 nm through 1440 nm.29. An optical measuring apparatus comprising:a measuring device configured to receive and measure a characteristic of a laser light that is emitted from an output end of an optical fiber the input of which is connected to a laser device; 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. sealing means for hermetically sealing an internal spatial propagation path of said measuring device with an amount of moisture limited to 100000 ppm by volume or less. 30. The optical measuring apparatus of claim 29, wherein said measuring device is configured to receive and measure a characteristic of a light with a center wavelength in an inclusive range of 1300 nm through 1440 nm.
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