CN-121984592-A - Optical transmission system, optical fiber loop system and electronic equipment

CN121984592ACN 121984592 ACN121984592 ACN 121984592ACN-121984592-A

Abstract

The application discloses an optical transmission system, an optical fiber loop system and electronic equipment, and relates to the technical field of optical transmission, wherein the optical transmission system comprises an isolation module, a first coupler and a second coupler, wherein the isolation module is connected with an output port of the first coupler and is used for receiving an optical fiber loop input signal; the device comprises an isolation module, an optical fiber ring, an acoustic-optic modulator, a hollow fiber, a feedback module and an acoustic-optic modulator, wherein the first end of the hollow fiber is connected with the isolation module and is used for transmitting an optical fiber ring input signal, the feedback module is connected with the second end of the hollow fiber and is used for returning the optical fiber ring input signal to the hollow fiber, and the isolation module is also connected with the acoustic-optic modulator and is also used for outputting the returned optical fiber ring input signal to the acoustic-optic modulator. The application enables the input signal of the optical fiber ring to realize round trip transmission in the single-section hollow optical fiber, thereby improving the equivalent transmission distance of the single-section hollow optical fiber by two times, obviously reducing the noise accumulation amount such as amplified spontaneous radiation noise, nonlinear distortion and the like, improving the signal transmission quality and the system stability, and reducing the control difficulty of the acousto-optic modulator and the operation and maintenance complexity of the system.

Inventors

LU YAO
ZHANG XU
JI HONGLIN
CHEN HUI
Jin Siyue
LI XINGFENG
Mi Shuchao
HE ZHIXUE

Assignees

鹏城实验室

Dates

Publication Date: 20260505
Application Date: 20260109

Claims (10)

1. An optical transmission system connected between an output port of a first coupler of a fiber optic loop system and an acousto-optic modulator, the optical transmission system comprising: The isolation module is connected with the output port of the first coupler and is used for receiving an optical fiber ring input signal input by the output port of the first coupler; the first end of the hollow optical fiber is connected with the isolation module and is used for transmitting the input signal of the optical fiber ring; The feedback module is connected with the second end of the hollow optical fiber and is used for receiving the optical fiber loop input signal and returning the optical fiber loop input signal to the hollow optical fiber; The isolation module is also connected with the acousto-optic modulator, and is also used for receiving the returned optical fiber loop input signal and outputting the returned optical fiber loop input signal to the acousto-optic modulator.
2. The optical transmission system of claim 1, wherein the isolation module comprises: The first port of the first circulator is connected with the output port of the first coupler, the second port of the first circulator is connected with the first end of the hollow fiber, and the third port of the first circulator is connected with the acousto-optic modulator; The first port of the first circulator is used for receiving an optical fiber ring input signal input by the output port of the first coupler, the second port of the first circulator is used for transmitting the optical fiber ring input signal to the hollow optical fiber and receiving the optical fiber ring input signal returned by the hollow optical fiber, and the third port of the first circulator is used for outputting the returned optical fiber ring input signal to the acousto-optic modulator.
3. The optical transmission system of claim 1, wherein the isolation module comprises: The isolator is connected with the output port of the first coupler and is used for receiving an optical fiber ring input signal input by the output port of the first coupler; the second coupler is respectively connected with the isolator, the first end of the hollow optical fiber and the acousto-optic modulator, and is used for transmitting the optical fiber ring input signal input by the isolator to the hollow optical fiber and outputting the optical fiber ring input signal returned by the hollow optical fiber to the acousto-optic modulator.
4. The optical transmission system of claim 1, wherein the feedback module comprises: the first port of the second circulator is connected with the third port of the second circulator, and the second port of the second circulator is connected with the second end of the hollow fiber; The second port of the second circulator is used for receiving the optical fiber ring input signal and transmitting the optical fiber ring input signal to the first port of the second circulator through the third port of the second circulator, and the first port of the second circulator is used for returning the optical fiber ring input signal to the hollow fiber.
5. The optical transmission system of claim 4, wherein the feedback module further comprises: and the optical amplifier is connected between the first port of the second circulator and the third port of the second circulator and is used for gaining the optical fiber ring input signal.
6. The optical transmission system of claim 1, wherein the feedback module comprises: The reflecting mirror is connected with the second end of the hollow optical fiber and is used for receiving the optical fiber ring input signal and reflecting the optical fiber ring input signal to the hollow optical fiber; wherein the reflector comprises a fiber optic reflector, a Bragg grating or a reflectometer.
7. The optical transmission system of claim 1, wherein the feedback module comprises: the on-chip feedback device is connected with the second end of the hollow optical fiber and is used for receiving the optical fiber loop input signal and returning the optical fiber loop input signal to the hollow optical fiber; Wherein the on-chip feedback device comprises a micro-ring.
8. An optical fiber loop system comprising a timing controller, a first coupler, an acousto-optic modulator, and the optical transmission system of any one of claims 1-7.
9. The fiber loop system of claim 8, further comprising a wavelength division multiplexer coupled to an input of the fiber loop system and a demultiplexer coupled to an output of the fiber loop system.
10. An electronic device, characterized in that the electronic device comprises an optical transmission system according to any one of claims 1-7.

Description

Optical transmission system, optical fiber loop system and electronic equipment Technical Field The present application relates to the field of optical transmission technologies, and in particular, to an optical transmission system, an optical fiber loop system, and an electronic device. Background In the verification of the long-distance transmission capability of hollow-core optical fibers, limited to the length of optical fibers drawn at a single time, an optical fiber loop system is currently commonly adopted, namely, long-distance transmission is simulated by circulating an optical signal in a shorter optical fiber segment for a plurality of times. In the cyclic experiment system, the precise time sequence control of the AOM (Acousto-OpticModulator, an acousto-optic modulator) is the core for realizing the correct injection and extraction of the optical signals, and is also the main technical difficulty at present. However, in the application scenario of broadband transmission, because the available length of a single section of the hollow fiber is limited, in order to realize equivalent long-distance transmission verification, the number of cycles of the single section of the fiber needs to be greatly increased, so that noise in the fiber loop system is continuously accumulated, and signals are distorted. Meanwhile, the comprehensive requirements of the AOM on time synchronization precision, power long-term stability and polarization control capability are continuously amplified, so that the AOM control difficulty is too high. Disclosure of Invention The application mainly aims to provide an optical transmission system, an optical fiber loop system and electronic equipment, and aims to solve the technical problems that the existing optical fiber loop system is high in noise and high in AOM control difficulty. To achieve the above object, the present application provides an optical transmission system connected between an output port of a first coupler of an optical fiber loop system and an acousto-optic modulator, comprising: The isolation module is connected with the output port of the first coupler and is used for receiving an optical fiber ring input signal input by the output port of the first coupler; the first end of the hollow optical fiber is connected with the isolation module and is used for transmitting the input signal of the optical fiber ring; The feedback module is connected with the second end of the hollow optical fiber and is used for receiving the optical fiber loop input signal and returning the optical fiber loop input signal to the hollow optical fiber; The isolation module is also connected with the acousto-optic modulator, and is also used for receiving the returned optical fiber loop input signal and outputting the returned optical fiber loop input signal to the acousto-optic modulator. In one embodiment, the isolation module comprises: The first port of the first circulator is connected with the output port of the first coupler, the second port of the first circulator is connected with the first end of the hollow fiber, and the third port of the first circulator is connected with the acousto-optic modulator; The first port of the first circulator is used for receiving an optical fiber ring input signal input by the output port of the first coupler, the second port of the first circulator is used for transmitting the optical fiber ring input signal to the hollow optical fiber and receiving the optical fiber ring input signal returned by the hollow optical fiber, and the third port of the first circulator is used for outputting the returned optical fiber ring input signal to the acousto-optic modulator. In one embodiment, the isolation module comprises: The isolator is connected with the output port of the first coupler and is used for receiving an optical fiber ring input signal input by the output port of the first coupler; the second coupler is respectively connected with the isolator, the first end of the hollow optical fiber and the acousto-optic modulator, and is used for transmitting the optical fiber ring input signal input by the isolator to the hollow optical fiber and outputting the optical fiber ring input signal returned by the hollow optical fiber to the acousto-optic modulator. In an embodiment, the feedback module includes: the first port of the second circulator is connected with the third port of the second circulator, and the second port of the second circulator is connected with the second end of the hollow fiber; The second port of the second circulator is used for receiving the optical fiber ring input signal and transmitting the optical fiber ring input signal to the first port of the second circulator through the third port of the second circulator, and the first port of the second circulator is used for returning the optical fiber ring input signal to the hollow fiber. In an embodiment, the feedback module further comprises: and the optical amplifier is