Broadband light source suitable for pump module for Raman amplification and Raman amplifier using same
IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0699846
(2003-11-04)
|
등록번호 |
US-7321461
(2008-01-22)
|
우선권정보 |
JP-2002-332432(2002-11-15) |
발명자
/ 주소 |
|
출원인 / 주소 |
- Sumitomo Electric Industries, Ltd.
|
대리인 / 주소 |
McDermott Will & Emery LLP
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인용정보 |
피인용 횟수 :
1 인용 특허 :
7 |
초록
▼
Provided are a broadband light source suitable for a pump light module for Raman amplification and a Raman amplifier which uses such light source. The broadband light source comprises a light source system for emitting light having two or more different output peak wavelengths and a nonlinear medium
Provided are a broadband light source suitable for a pump light module for Raman amplification and a Raman amplifier which uses such light source. The broadband light source comprises a light source system for emitting light having two or more different output peak wavelengths and a nonlinear medium having an input port and an output port, and the nonlinear medium affords nonlinear effect on light emitted from the light source system and input from the input port, and outputs the resultant light as pump light from the output port. The Raman amplifier, which comprises an optical fiber for Raman amplification, a multiplexing module, and the broadband light source of the present invention, amplifies signal light propagating through the optical fiber for Raman amplification.
대표청구항
▼
What is claimed is: 1. A Raman amplification pump module for outputting pump light for Raman-amplification of signal light propagating through an optical waveguide path, said module comprising: a light source system for emitting light having two or more different output peak wavelengths; and a nonl
What is claimed is: 1. A Raman amplification pump module for outputting pump light for Raman-amplification of signal light propagating through an optical waveguide path, said module comprising: a light source system for emitting light having two or more different output peak wavelengths; and a nonlinear medium having an input port and an output port, wherein said light source system comprises two or more light sources for emitting light having different wavelengths and an optical multiplexer for multiplexing light from said light sources and outputting the multiplexed light, said nonlinear medium affording nonlinear effect on light emitted from said light source system and input from the input port, and outputting the resultant light as pump light from the output port, and at least one of said light sources being a high-output laser for outputting power capable of causing optical parametric effect. 2. A Raman amplification pump module according to claim 1, wherein said light source system comprises: two or more light sources for emitting light having different wavelengths; and an optical multiplexer for multiplexing light from the light sources and outputting the multiplexed light, at least one of the light sources being a semiconductor laser without temperature adjusting means. 3. A Raman amplification pump module according to claim 1, wherein said light source system has one multi-wavelength light source for oscillating at two or more different wavelengths. 4. A Raman amplification pump module for outputting pump light for Raman-amplification of signal light propagating through an optical waveguide path, said module comprising: a light source system for emitting light having two or more different output peak wavelengths; and a nonlinear medium having an input port and an output port, said light source system comprises two or more light sources for emitting light having different wavelengths and an optical multiplexer for multiplexing light from said light sources and outputting the multiplexed light, and said nonlinear medium affording nonlinear effect on light emitted from said light source system and input from the input port, and outputting the resultant light as pump light from the output port, wherein the channel spacing Δλ of two output peak wavelengths satisfies the following relationship with respect to at least one set of combination out of the combinations of two output peak wavelengths selected from said two or more output peak wavelengths: where λ0 is the wavelength center of two output peak wavelengths, γ and D represent a nonlinear coefficient and a chromatic dispersion at λ0, respectively, c represents light speed, and P1 and P2 represent power at two output peak wavelengths, respectively. 5. A Raman amplification pump module according to claim 1, wherein the channel spacing Δλ is equal to or more than 2 nm with respect to at least one set of combination out of the combinations of two output peak wavelengths selected from said two or more output peak wavelengths. 6. A Raman amplification pump module according to claim 1, wherein with respect to at least one set of combination out of the combinations of two output peak wavelengths selected from said two or more output peak wavelengths, when viewed from one wavelength having a larger power than the other wavelength, the other wavelength and the zero dispersion wavelength of the nonlinear medium exist on the same side. 7. A Raman amplification pump module according to claim 1, wherein said nonlinear medium is an optical fiber. 8. A Raman amplification pump module according to claim 7, wherein the relationship of the following formula is satisfied: γ/α is not less than 13 W-1dB-1 where the nonlinear coefficient of said optical fiber is γ W-1 km-1, and the transmission loss of said optical fiber is α dB/km.
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Takasaka, Shigehiro; Mimura, Yu, Optical amplifier, optical amplifying system, wavelength converter, optical amplification method, and optical communication system.
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