Title:
OPTICAL FIBER AMPLIFIER
Document Type and Number:
WIPO Patent Application WO/2022/157896
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide an optical fiber amplifier that can seamlessly amplify signal light in multiple bandwidths at once. In order to achieve the aforementioned purpose, this optical fiber amplifier, which amplifies multiple wavelength bands, is characterized by being provided with a rare-earth-doped optical fiber which, in cross-section, has one signal light primary propagation region and a doped region where rare earth ions have been added, wherein the doped region is outside of the aforementioned propagation region. In this optical fiber amplifier, while the signal light primary propagation region is the same within the fiber cross section of the rare-earth-doped optical fiber, the signal light propagation regions utilized differ partially by signal wavelength, and rare-earth ions are added to the partially differing propagation regions so that the gain in the amplification wavelength band regions is flattened as amplification rates differing for each signal wavelength.
Inventors:
AOZASA SHINICHI (JP)
SAKAMOTO TAIJI (JP)
NAKAJIMA KAZUHIDE (JP)
MATSUI TAKASHI (JP)
SAKAMOTO TAIJI (JP)
NAKAJIMA KAZUHIDE (JP)
MATSUI TAKASHI (JP)
Application Number:
PCT/JP2021/002094
Publication Date:
July 28, 2022
Filing Date:
January 21, 2021
Export Citation:
Assignee:
NIPPON TELEGRAPH & TELEPHONE (JP)
International Classes:
H01S3/10
Domestic Patent References:
| WO2018138982A1 | 2018-08-02 |
Foreign References:
| JP2003174220A | 2003-06-20 | |||
| JP2006114858A | 2006-04-27 | |||
| JP2002374024A | 2002-12-26 | |||
| JP2017157757A | 2017-09-07 |
Attorney, Agent or Firm:
OKADA, Kenji et al. (JP)
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