CN-121984590-A - Optical communication system and optical communication architecture

CN121984590ACN 121984590 ACN121984590 ACN 121984590ACN-121984590-A

Abstract

The present invention relates to the field of optical communications technologies, and in particular, to an optical communications system and an optical communications architecture. The optical communication system comprises an optical communication terminal, a pump light source assembly and at least one doped optical fiber amplifying assembly, wherein one end of the pump light source assembly is connected with the optical communication terminal, the other end of the pump light source assembly is connected with a transmission end of the optical communication system through the doped optical fiber amplifying assembly arranged in an air core optical fiber transmission link, the transmission end of the optical communication system is connected with a transmission end of another optical communication system through the air core optical fiber transmission link, the pump light source assembly generates pump light and signal light and transmits the pump light and the signal light to the doped optical fiber amplifying assembly after being combined, and the doped optical fiber amplifying assembly amplifies the signal light based on the pump light and transmits the signal light to the other optical communication system through the air core optical fiber transmission link. A communication link is constructed based on the hollow fiber, the amplification of optical signals is realized by adopting a remote pumping mode, the passive characteristic of the fiber link is maintained, and the method is suitable for an ultra-long-distance relay-free link.

Inventors

ZHANG XU
HE ZHIXUE
LI XINGFENG
JI HONGLIN
Mi Shuchao
CHEN HUI
WANG QIBING

Assignees

鹏城实验室

Dates

Publication Date: 20260505
Application Date: 20260127

Claims (10)

1. An optical communication system is characterized by comprising an optical communication terminal, a pumping light source assembly and at least one doped optical fiber amplifying assembly; one end of the pump light source component is connected with the optical communication terminal, the other end of the pump light source component is connected with the transmission end of the optical communication system through at least one doped optical fiber amplifying component arranged in an air core optical fiber transmission link, and the transmission end of the optical communication system is connected with the transmission end of another optical communication system through the air core optical fiber transmission link; The pump light source component is used for generating pump light and signal light transmitted by the optical communication terminal, and transmitting the pump light and the signal light to the doped optical fiber amplifying component after being combined; the doped optical fiber amplifying assembly is used for amplifying the signal light based on the pump light, and then the amplified signal light is transmitted to another optical communication system through the hollow optical fiber transmission link by the transmission end of the optical communication system.
2. The optical communication system of claim 1, wherein the pump light source assembly comprises a first combiner, a pump laser, and a control unit; the first end of the first wave combiner is connected with the optical communication terminal, the second end of the first wave combiner is connected with the doped optical fiber amplifying assembly through the hollow optical fiber transmission link, the beam combining end of the first wave combiner is connected with the output end of the pump laser, and the control end of the pump laser is connected with the control unit.
3. The optical communication system of claim 1, wherein each of the doped fiber amplification modules is further configured to receive feedback light transmitted by another optical communication system through the hollow fiber transmission link, amplify the feedback light based on the pump light, and transmit the amplified feedback light to the optical communication terminal through the pump light source module.
4. The optical communication system of claim 3, wherein the optical communication terminal comprises an optical circulator; the transmitting end of the optical communication terminal is connected with the first end of the optical circulator, the second end of the optical circulator is connected with the pumping light source assembly, and the receiving end of the optical communication terminal is connected with the third end of the optical circulator.
5. The optical communication system of claim 3, wherein in the case where the number of the doped fiber amplification components is one, the doped fiber amplification components include a first demultiplexer, a first coupler, a second multiplexer, a third multiplexer, and a first doped fiber; The first end of the first beam splitter is connected with the pumping light source component through the hollow fiber transmission link, the second end of the first beam splitter is connected with the first end of the second beam combiner, the beam splitting end of the first beam splitter is connected with the input end of the first coupler, the first output end of the first coupler is connected with the beam combining end of the second beam combiner, the second output end of the first coupler is connected with the beam combining end of the third beam combiner, the first end of the third beam combiner is connected with the transmission end of the optical communication system, and the second ends of the second beam combiner and the third beam combiner are connected with the first doped optical fiber.
6. The optical communication system of claim 3, wherein in the case where the number of the doped fiber amplifying assemblies is more than one, the doped fiber amplifying assemblies include at least one first amplifying unit and one second amplifying unit; The first amplifying units are sequentially connected in series in the hollow fiber transmission link, the first end of the first amplifying unit positioned at the head end is connected with the pumping light source assembly, the second end of the first amplifying unit at the tail end is connected with the first end of the second amplifying unit, and the second end of the second amplifying unit is connected with the transmission end of the optical communication system; each first amplifying unit is used for transmitting pump light and the signal light subjected to primary amplification to the second amplifying unit; The second amplifying unit is configured to, after performing secondary amplification on the signal light based on the pump light, transmit the signal light after secondary amplification to another optical communication system through the hollow fiber transmission link by using a transmission end of the optical communication system.
7. The optical communication system according to claim 6, wherein the first amplifying unit includes a second demultiplexer, a second coupler, a third coupler, a second doped optical fiber, and fourth to sixth combiners; The first end of the second wave separator is connected with the pumping light source component through the hollow fiber transmission link, the second end of the second wave separator is connected with the first end of the fourth wave combiner, the beam-splitting end of the second wave separator is connected with the input end of the second coupler, the first output end of the second coupler is connected with the input end of the third coupler, the first output end of the third coupler is connected with the beam-combining end of the fourth wave combiner, the second output end of the third coupler is connected with the beam-combining end of the fifth wave combiner, the second output end of the second coupler is connected with the beam-combining end of the sixth wave combiner, the first end of the sixth wave combiner is connected with the next unit through the hollow fiber transmission link, the second end of the sixth wave combiner is connected with the first end of the fifth wave combiner, and the second end of the fifth wave combiner is connected with the second optical fiber.
8. The optical communication system of claim 7, wherein the second amplifying unit comprises a third demultiplexer, a fourth coupler, a seventh multiplexer, an eighth multiplexer, and a third doped optical fiber; The first end of the third wave separator is connected with the first amplifying unit through the hollow fiber transmission link, the second end of the third wave separator is connected with the first end of the seventh wave combiner, the beam-splitting end of the third wave separator is connected with the input end of the fourth coupler, the first output end of the fourth coupler is connected with the beam-combining end of the seventh wave combiner, the second output end of the fourth coupler is connected with the beam-combining end of the eighth wave combiner, the first end of the eighth wave combiner is connected with the transmission end of the optical communication system, and the second ends of the seventh wave combiner and the eighth wave combiner are connected with the third doped optical fiber.
9. The optical communication system of claim 1, wherein the optical communication terminal is a wavelength division multiplexed multi-wavelength transmission terminal, the pump light source assembly comprises a multi-band corresponding pump laser, and the doped fiber amplification assembly comprises a multi-band corresponding doped fiber and a gain equalization module.
10. An optical communication architecture comprising two optical communication systems as claimed in any one of claims 1 to 9 connected by a hollow core optical fiber.

Description

Optical communication system and optical communication architecture Technical Field The present invention relates to the field of optical communications technologies, and in particular, to an optical communications system and an optical communications architecture. Background In the long-distance unrepeatered optical communication system, the optical fiber link can realize point-to-point communication of hundreds of kilometers without any active equipment, and has great advantages in remote areas, power communication, cross-sea and other scenes. The ultra-long distance optical communication system generally introduces a remote pump Raman amplifier, but is limited by the performance of the traditional single-mode fiber in attenuation, nonlinearity and the like, and is difficult to break through further in speed and transmission distance. The anti-resonance hollow fiber which is rapidly developed in recent years shows subversion breakthrough in various performances, and the construction of a communication link based on the hollow fiber can bring the advantages of low loss, low nonlinearity, low delay and the like. However, if the single mode fiber is simply replaced by the hollow core fiber, although improvement in performance can be obtained, the system-level advantage of the hollow core fiber cannot be fully exerted. In order to fully exploit the performance advantages of hollow optical fibers, a novel long-distance unrepeatered optical communication system conforming to the characteristics of the hollow optical fibers needs to be designed aiming at the characteristics of the hollow optical fibers. The foregoing is provided merely for the purpose of facilitating understanding of the technical solutions of the present invention and is not intended to represent an admission that the foregoing is prior art. Disclosure of Invention The invention mainly aims to provide an optical communication system and an optical communication architecture, and aims to solve the technical problem that the performance of a long-distance optical fiber link applied to a single-mode optical fiber is limited in the prior art. In a first aspect, the present invention provides an optical communication system comprising an optical communication terminal, a pump light source assembly, and at least one doped fiber amplification assembly; one end of the pump light source component is connected with the optical communication terminal, the other end of the pump light source component is connected with the transmission end of the optical communication system through at least one doped optical fiber amplifying component arranged in an air core optical fiber transmission link, and the transmission end of the optical communication system is connected with the transmission end of another optical communication system through the air core optical fiber transmission link; The pump light source component is used for generating pump light and signal light transmitted by the optical communication terminal, and transmitting the pump light and the signal light to the doped optical fiber amplifying component after being combined; the doped optical fiber amplifying assembly is used for amplifying the signal light based on the pump light, and then the amplified signal light is transmitted to another optical communication system through the hollow optical fiber transmission link by the transmission end of the optical communication system. Optionally, the pump light source assembly comprises a first combiner, a pump laser and a control unit; the first end of the first wave combiner is connected with the optical communication terminal, the second end of the first wave combiner is connected with the doped optical fiber amplifying assembly through the hollow optical fiber transmission link, the beam combining end of the first wave combiner is connected with the output end of the pump laser, and the control end of the pump laser is connected with the control unit. Optionally, each doped optical fiber amplifying assembly is further configured to receive feedback light transmitted by another optical communication system through the hollow fiber transmission link, amplify the feedback light based on the pump light, and transmit the amplified feedback light to the optical communication terminal through the pump light source assembly. Optionally, the optical communication terminal comprises an optical circulator; the transmitting end of the optical communication terminal is connected with the first end of the optical circulator, the second end of the optical circulator is connected with the pumping light source assembly, and the receiving end of the optical communication terminal is connected with the third end of the optical circulator. Optionally, in the case that the number of the doped fiber amplifying assemblies is one, the doped fiber amplifying assembly includes a first demultiplexer, a first coupler, a second multiplexer, a third multiplexer, and a first dop