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US 5,327,282 AGranted
Optical amplifier for 1.3 .mu.m band
AssigneeFujitsu Limited
InventorsKeiko Takeda, Shinya Inagaki, Kenji Tagawa
Life of this patent
Estimating the term…
Abstract
Disclosed is an optical amplifier, wherein efficient optical amplification of signal light of 1.3 .mu.m band is made achievable by optically exiting a doped fiber doped with Pr (praseodymium) alone, or together with other rare earth element, or a similar optical waveguide arrangement, and then supplying the optical waveguide arrangement with the signal light.
Claims16
An optical amplifier amplifying signal light of 1.3 .mu.m band comprising:
- an optical waveguide having a waveguide region which is doped with Pr and of which a first end is supplied with said signal light;
- pumping means for causing optical excitation in said waveguide region;
- and
- booster means for increasing power density of fluorescence of 1.45 .mu.m band generated in said waveguide region incidentally to optical amplification of said signal light;
- wherein
- said signal light undergone amplification is output from a second end of said waveguide region.
3 more elements
An optical amplifier amplifying signal light of 1.3 .mu.m band comprising:
- an optical waveguide having a waveguide region which is doped with Pr and at least one of, Nd and Yb of which a first end is supplied with said signal light;
- a light source outputting light of 0.8 .mu.m band;
- optical coupling means for supplying said light of 0.8 .mu.m band from said light source to said waveguide region;
- and
- a first and a second optical filter disposed on the upstream and downstream sides of said waveguide region in the propagating direction of said signal light, respectively, for reflecting light of 1.0 .mu.m band;
- wherein
- an optical resonator arrangement for said light of 1.0 .mu.m band is formed between said first and second optical filters, said optical resonator arrangement having a resonating optical path including said waveguide region, and
- said signal light undergone amplification is output from a second end of said waveguide region.
5 more elements
An optical amplifier amplifying signal light of 1.3 .mu.m band comprising:
- an optical waveguide having a waveguide region which is doped with Pr and of which a first end is supplied with said signal light;
- pumping means for outputting light of 1.0 .mu.m band for causing optical excitation in said waveguide region;
- and
- optical coupling means for supplying said light of 1.0 .mu.m band from said pumping means to said waveguide region;
- wherein
- said pumping means includes a laser resonator of which resonating optical path is doped with at least either of Nd and Yb and means for supplying said laser resonator with light of 0.8 .mu.m band, and
- said signal light undergone amplification is output from a second end of said waveguide region.
4 more elements
Dependencies are inferred from the claim text.