Title:
EXCITATION LIGHT GENERATION DEVICE, LIGHT AMPLIFICATION DEVICE, AND EXCITATION LIGHT GENERATION METHOD
Document Type and Number:
WIPO Patent Application WO/2023/162307
Kind Code:
A1
Abstract:
This excitation light generation device comprises: a first multi-mode laser that outputs first excitation light; a second multi-mode laser that outputs second excitation light; a first excitation current/temperature controller that controls the temperature and excitation current of the first multi-mode laser; a second excitation current/temperature controller that controls the temperature and excitation current of the second multi-mode laser; a first polarization-maintaining variable optical attenuator that adjusts the intensity of light with the polarized state thereof maintained in linear polarization, and outputs the resulting light; a second polarization-maintaining variable optical attenuator that adjusts the intensity of light with the polarized state thereof maintained in linear polarization, and outputs the resulting light; and a polarization-multiplexing circuit that performs polarization-multiplexing and outputs the result. The first and second excitation current/temperature controllers perform control such that the longitudinal modes of the first excitation light and the second excitation light do not overlap. The first and second polarization-maintaining variable optical attenuators perform control so as to provide equal intensities.
Inventors:
KAWAKAMI HIROTO (JP)
KOBAYASHI TAKAYUKI (JP)
KISAKA YOSHIAKI (JP)
KUWAHARA SHOICHIRO (JP)
KOBAYASHI TAKAYUKI (JP)
KISAKA YOSHIAKI (JP)
KUWAHARA SHOICHIRO (JP)
Application Number:
PCT/JP2022/034368
Publication Date:
August 31, 2023
Filing Date:
September 14, 2022
Export Citation:
Assignee:
NIPPON TELEGRAPH & TELEPHONE (JP)
International Classes:
H01S3/0941; H01S3/10; H01S3/30
Domestic Patent References:
| WO2020141105A1 | 2020-07-09 |
Foreign References:
| JP2003188449A | 2003-07-04 | |||
| JPH11121849A | 1999-04-30 | |||
| JPH057047A | 1993-01-14 | |||
| JPH05136495A | 1993-06-01 | |||
| JP2013101378A | 2013-05-23 | |||
| JP2012195787A | 2012-10-11 | |||
| JP2010224567A | 2010-10-07 | |||
| US8903249B2 | 2014-12-02 |
Attorney, Agent or Firm:
SHIGA INTERNATIONAL PATENT OFFICE (JP)
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