US 11,990,726 B2
Optical repeater, manufacturing method of optical repeater, and relay method of optical signal
Satoshi Mikami, Tokyo (JP); and Eduardo Mateo Rodriguez, Tokyo (JP)
Assigned to NEC CORPORATION, Tokyo (JP)
Appl. No. 16/979,746
Filed by NEC Corporation, Tokyo (JP)
PCT Filed Dec. 17, 2018, PCT No. PCT/JP2018/046309
§ 371(c)(1), (2) Date Sep. 10, 2020,
PCT Pub. No. WO2019/176205, PCT Pub. Date Sep. 19, 2019.
Claims priority of application No. 2018-045417 (JP), filed on Mar. 13, 2018.
Prior Publication US 2021/0044075 A1, Feb. 11, 2021
Int. Cl. H01S 3/094 (2006.01); H01S 3/091 (2006.01); H01S 3/23 (2006.01); H04B 10/29 (2013.01); H04B 10/291 (2013.01)
CPC H01S 3/094061 (2013.01) [H01S 3/0912 (2013.01); H01S 3/094038 (2013.01); H01S 3/2308 (2013.01); H01S 3/2383 (2013.01); H04B 10/29 (2013.01); H04B 10/291 (2013.01)] 6 Claims
OG exemplary drawing
 
1. An optical repeater comprising:
three or more light sources configured to output lights;
three or more optical amplifiers configured to amplify optical signals using input excitation lights; and
an optical distributor configured to branch the light output from each of the three or more light sources into two branched lights and distribute the branched lights in such a manner that each of the three or more optical amplifiers receives the branched lights branched from the lights output from two different light sources as the excitation light, wherein
the optical distributor comprises:
three or more demultiplexers configured to respectively receive the lights output from the three or more light sources and configured to each branch the received light into the two branched lights; and
three or more multiplexers configured to each receive the branched lights output from two different demultiplexers included in the three or more demultiplexers and output the excitation light obtained by multiplexing the received branched lights to any one of the three or more optical amplifiers.
 
5. A manufacturing method of an optical repeater comprising:
disposing three or more light sources configured to output lights;
disposing three or more optical amplifiers configured to amplify optical signals using input excitation lights, and
disposing an optical distributor between the three or more light sources and the three or more optical amplifiers, the optical distributor configured to branch the light output from each of the three or more light sources into two branched lights and distribute the branched lights in such a manner that each of the three or more optical amplifiers receives the branched lights branched from the lights output from two different light sources as the excitation light, wherein
the optical distributor comprises:
three or more demultiplexers configured to respectively receive the lights output from the three or more light sources and configured to each branch the received light into the two branched lights; and
three or more multiplexers configured to each receive the branched lights output from two different demultiplexers included in the three or more demultiplexers and output the excitation light obtained by multiplexing the received branched lights to any one of the three or more optical amplifiers.
 
6. A relay method of an optical signal comprising:
by each of three or more demultiplexers, branching lights output from three or more light sources into two branched lights; and
by each of three or more multiplexers, multiplexing the branched lights output from two different demultiplexers included in the three or more demultiplexers and outputting multiplexed light to any one of three or more optical amplifiers, wherein
each of the three or more optical amplifiers amplifies an optical signal using the multiplexed light output thereto as input excitation light.