CN-122001461-A - High-precision differential instantaneous interruption signal generation system and method thereof

CN122001461ACN 122001461 ACN122001461 ACN 122001461ACN-122001461-A

Abstract

The application discloses a high-precision differential instantaneous interruption signal generation system and a method thereof, wherein the high-precision differential instantaneous interruption signal generation system comprises high-speed pulse light source equipment, an optical power distribution device, a dual-channel power meter, a high-speed pulse mixer and a lower computer, wherein the high-speed pulse light source equipment comprises a high-power laser and a low-power laser, the high-power laser and the low-power laser are respectively connected with the optical power distribution device, the dual-channel power meter is connected with a first output port of the two optical power distribution devices, the high-speed pulse mixer is connected with a second output port of the two power distribution devices so as to enable two paths of optical signals output by the two second output ports to be subjected to intensity gradient differential mixing and output analog optical signals, and the lower computer comprises a control module, a self-correction module and a calculation module, wherein the control module is connected with the high-speed pulse light source equipment and the dual-channel power meter in a signal connection mode, and the self-correction module is connected with the control module. The application solves the problem that the existing optical fiber instantaneous signal generator adopts a single laser source scheme, and the accuracy of the rapid transient signal simulation is insufficient.

Inventors

CHEN XINHUA
FEI WENJIE
DOU TINGYU

Assignees

上海江木智能科技有限公司

Dates

Publication Date: 20260508
Application Date: 20260113

Claims (7)

1. A high precision differential instantaneous signal generation system, comprising: A high-speed pulse light source device including a high-power laser for outputting a high-power optical signal and a low-power laser for outputting a low-reference-power optical signal; The high-power laser and the low-power laser are respectively connected with an optical power distribution device, and the optical power distribution device is provided with a first output port and a second output port; the two-channel power meter is connected to the first output ports of the two optical power distribution devices; the high-speed pulse mixer is connected to the second output ports of the two power distribution devices so as to enable the two paths of optical signals output by the two second output ports to carry out intensity gradient differential mixing and output analog optical signals; The lower computer comprises a control module, a self-correction module for establishing a nonlinear correction model between the power and the voltage of the light source, and a calculation module for calculating and obtaining an initial voltage pre-estimated value based on the nonlinear correction model and a target pulse amplitude, wherein the control module is in signal connection with the high-speed pulse light source equipment and the dual-channel power meter, the self-correction module is connected with the control module, the calculation module is connected with the control module and the self-correction module, and the control module iteratively adjusts the voltage value of the high-power laser based on the initial voltage pre-estimated value and by adopting a PID algorithm, so that the actual output power of the analog light signal is matched with a set power value corresponding to the target pulse amplitude.
2. The high precision differential instantaneous break signal generation system of claim 1 in which the optical power distribution device is a planar optical waveguide splitter.
3. The high precision differential instantaneous break signal generation system of claim 2 in which the planar optical waveguide splitter is a 50:50 planar optical waveguide splitter.
4. The high precision differential instantaneous signal generation system of claim 1 in which the self-correction module comprises: The partition unit is used for dividing the preset power range of the light source into a plurality of continuous working intervals and is connected with the control module; The calibration unit is used for calibrating the analog voltage values of the characteristic power endpoints at the two ends of each working interval and is connected with the partition unit; And the modeling unit is used for constructing a nonlinear correction model based on the power value and the analog voltage value of each characteristic power endpoint and is connected with the partition unit, the calibration unit and the control module.
5. The high-precision differential instantaneous-break signal generation system according to claim 1, wherein the lower computer is connected with an upper computer.
6. A high-precision differential instantaneous-break signal generating method using the high-precision differential instantaneous-break signal generating system according to any one of claims 1 to 5, characterized by comprising the steps of: The self-correction module of the lower computer establishes a nonlinear correction model between the power and the voltage of the light source; the control module of the lower computer obtains a target pulse amplitude; Based on the nonlinear correction model and the target pulse amplitude, a calculation module of the lower computer calculates and obtains an initial voltage estimated value; Based on the initial voltage estimated value, the control module adopts PID algorithm to iteratively adjust the voltage value of the high-power laser, so that the actual output power of the analog optical signal is matched with the set power value corresponding to the target pulse amplitude.
7. The method of generating a high-precision differential instantaneous-break signal according to claim 6, wherein the self-correction module comprises a partition unit, a calibration unit and a modeling unit, and the step of establishing a nonlinear correction model between the power and the voltage of the light source by the self-correction module comprises: the partition unit divides the preset power range of the light source into a plurality of continuous working areas; The calibration unit calibrates the analog voltage values of the characteristic power endpoints at the two ends of each working interval; based on the power values and the analog voltage values of the characteristic power endpoints, the modeling unit builds a nonlinear correction model.

Description

High-precision differential instantaneous interruption signal generation system and method thereof Technical Field The invention relates to the technical field of optical fiber communication, in particular to a high-precision differential instantaneous interruption signal generation system and a method thereof. Background Fiber optic communications serves as a core infrastructure for modern information society, the reliability of which is directly related to the quality of service of the communication network. In practical application environments, optical fiber links and interconnection devices thereof, such as connectors, jumpers, optical modules, etc., often face various dynamic stresses such as vibration, shock, temperature spikes, mechanical stretching, etc. These stresses may cause momentary optical signal interruption of the fiber link, manifested as momentary severe drops in optical power or momentary loss of connection status. Although the transient interruption phenomenon has extremely short duration (maybe only microsecond or even nanosecond), the transient interruption phenomenon is enough to cause a large number of data bit errors, sequence desynchronization or system retransmission in a high-speed optical communication system, and the system performance is remarkably deteriorated. In the fields of high reliability requirements of aerospace, military equipment, industrial control and the like, the testing and evaluation of the contact reliability of optical interconnection elements in a dynamic environment are very important. Accordingly, a test instrument, a fiber optic transient break signal generator, dedicated to simulating such transient phenomena has been developed. Early fiber instantaneous detection systems generally have time resolutions on the order of microseconds, such as JW3324 from Shanghai Jiahui optoelectronics, inc., and OP1100 from U.S. OptoTest, which represent products. Common implementations thereof rely mostly on simple threshold comparison circuits and fixed decision references. The scheme has obvious short plates, and the method generally adopts a fixed optical fiber instantaneous break judgment reference value to extract instantaneous break characteristics, so that the scheme is difficult to adapt to complex actual working conditions. For example, if the optical fiber fails to recover to the original optical power value after the interruption, the system may continuously misjudge as the interruption state, and cannot accurately process the subsequent real interruption event. In addition, the analog front end of the early system is easy to be disturbed by noise, slow in response speed, unstable in system and the like when pursuing nanosecond response. The optical fiber instantaneous signal generator in the current market adopts a single laser source scheme, and the rapid transient signal simulation precision is not enough. Disclosure of Invention In order to overcome the defects existing in the prior art, a high-precision differential instantaneous interruption signal generation system and a method thereof are provided, so as to solve the problem that the existing optical fiber instantaneous interruption signal generator adopts a single laser source scheme and has insufficient precision in quick transient signal simulation. To achieve the above object, there is provided a high-precision differential instantaneous interruption signal generation system including: A high-speed pulse light source device including a high-power laser for outputting a high-power optical signal and a low-power laser for outputting a low-reference-power optical signal; The high-power laser and the low-power laser are respectively connected with an optical power distribution device, and the optical power distribution device is provided with a first output port and a second output port; the two-channel power meter is connected to the first output ports of the two optical power distribution devices; the high-speed pulse mixer is connected to the second output ports of the two power distribution devices so as to enable the two paths of optical signals output by the two second output ports to carry out intensity gradient differential mixing and output analog optical signals; The lower computer comprises a control module, a self-correction module for establishing a nonlinear correction model between the power and the voltage of the light source, and a calculation module for calculating and obtaining an initial voltage pre-estimated value based on the nonlinear correction model and a target pulse amplitude, wherein the control module is in signal connection with the high-speed pulse light source equipment and the dual-channel power meter, the self-correction module is connected with the control module, the calculation module is connected with the control module and the self-correction module, and the control module iteratively adjusts the voltage value of the high-power laser based on the initial voltag