阅读说明：本技术 一种自行确定测量阈值的光纤编码识别系统及方法 (Optical fiber code identification system and method for automatically determining measurement threshold ) 是由 朱惠君 薛鹏 白金刚 毛志松 邬耀华 于 2020-06-23 设计创作，主要内容包括：本发明公开了一种自行确定测量阈值的光纤编码识别系统,包括：光源模块；环形器,环形器具有第一端口、第二端口、第三端口,第一端口与光源模块的输出端连接；分光器,分光器输入端与环形器的第二端口连接,分光器具有主分光端和副分光端,主分光端用于连接带有光纤编码的光纤；反射镜,与分光器的副分光端连接；波形探测器,波形探测器的输入端与环形器的第三端口连接；主控制器,分别与光源模块、波形探测器电性连接。利用分光器和反射镜,将分光后的光波全部反射,系统可根据此反射光波及分光比例确定初始光强阈值,进而计算光纤上测试点的光强阈值,本方案无需人工参与,可由系统自行确定测量阈值,检测高效且可避免环境因素影响检测精度。(The invention discloses an optical fiber code identification system for automatically determining a measurement threshold, which comprises: a light source module; the circulator is provided with a first port, a second port and a third port, and the first port is connected with the output end of the light source module; the input end of the optical splitter is connected with the second port of the circulator, the optical splitter is provided with a main optical splitting end and an auxiliary optical splitting end, and the main optical splitting end is used for connecting optical fibers with optical fiber codes; the reflector is connected with the secondary light splitting end of the light splitter; the input end of the waveform detector is connected with the third port of the circulator; and the main controller is electrically connected with the light source module and the waveform detector respectively. The light wave after light splitting is totally reflected by the light splitter and the reflector, the system can determine an initial light intensity threshold according to the reflected light wave and the light splitting ratio, and then the light intensity threshold of the test point on the optical fiber is calculated.)

1. An optical fiber code identification system for self-determining a measurement threshold, comprising: the method comprises the following steps:

a light source module (100) for outputting a light wave signal for testing;

a circulator (200), wherein the circulator (200) is provided with a first port, a second port and a third port, and the first port is connected with the output end of the light source module (100);

an optical splitter (300), an input end of the optical splitter (300) is connected with the second port of the circulator (200), the optical splitter (300) is provided with a main splitting end and a secondary splitting end, and the main splitting end is used for connecting an optical fiber (500) with an optical fiber code (400);

a reflector (600) connected to the secondary splitting end of the splitter (300);

the input end of the waveform detector (700) is connected with the third port of the circulator (200);

and the main controller (800) is electrically connected with the light source module (100) and the waveform detector (700) respectively.

2. The fiber-optic coded identification system for self-determining a measurement threshold of claim 1, wherein: the light source module (100) comprises a driver (110) capable of adjusting output current and a light source (120) driven by the driver (110), wherein the driver (110) is electrically connected with the main controller (800).

3. The fiber-optic coded identification system for self-determining a measurement threshold of claim 2, wherein: the light source (120) adopts a narrow-bandwidth light source or a pulse light source.

4. The fiber-optic coded identification system for self-determining a measurement threshold of claim 2, wherein: the light source module (100) further comprises a first SOA optical switch (130) electrically connected with the main controller (800), the first SOA optical switch (130) is connected between the light source (120) and the first port of the circulator (200), and the light source (120) adopts a high-bandwidth light source; and a second SOA optical switch (140) is arranged between the input end of the waveform detector (700) and the third port of the circulator (200), and the second SOA optical switch (140) is electrically connected with the main controller (800).

5. The fiber-optic coded identification system for self-determining a measurement threshold of claim 1, wherein: the light splitting ratio of the main light splitting end and the auxiliary light splitting end of the light splitter (300) is 99: 1.

6. The fiber-optic coded identification system for self-determining a measurement threshold of claim 1, wherein: the waveform detector (700) adopts a demodulator for realizing the separation of light waves and the measurement of wavelengths.

7. The fiber-optic coded identification system for self-determining a measurement threshold of claim 1, wherein: the main controller (800) adopts an FPGA controller.

8. A method for self-determining a measurement threshold value by an optical fiber code identification system is characterized by comprising the following steps: comprises the following steps

The light wave output is divided into two paths by using a light splitter, wherein one path of light wave output is output to an optical fiber with optical fiber coding, and the other path of light wave output is output to a reflector;

collecting the intensity of the light wave signal reflected by the reflector, and calculating the initial light wave signal intensity according to the light splitting output proportion of the light splitter;

and calculating the threshold value of the optical fiber measuring point by using the initial light wave signal intensity and the attenuation coefficient of the optical fiber, wherein the attenuation coefficient is determined by the material of the optical fiber and the length of the optical fiber.

9. The method for self-determining the measurement threshold of the fiber code identification system according to claim 8, wherein: collecting the intensity of the light wave signal reflected by the reflector comprises:

acquiring a reflected continuous spectrum;

determining the position of the light wave signal reflected by the reflector from the continuous spectrum;

and acquiring the intensity of the light wave signal at the position of the light wave signal reflected by the reflector.

10. The method for self-determining the measurement threshold of the fiber code identification system according to claim 8 or 9, wherein: and the threshold value F1 of the optical fiber measuring point is F0/(10^ (r/10)), wherein F0 is defined as the initial lightwave signal intensity, and r is the attenuation coefficient of the optical fiber.

Technical Field

The invention relates to the field of optical fiber communication, in particular to an optical fiber code identification system and method for automatically determining a measurement threshold value.

Background

In the field of optical fiber communication, an optical fiber code consists of a plurality of optical fiber gratings with different wavelengths, and an optical fiber code identification system is an optical detection system for accurately identifying the wavelengths of the optical fiber gratings. Because different optic fibre need the optical signal of corresponding size to detect, the output light intensity of present optical detection system relies on artifical the measuring, because optic fibre has a certain distance, artifical measuring output light intensity is not only inefficient and receive the environmental impact (like the light path structural change) and lead to the rate of accuracy not enough.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides an optical fiber code identification system for automatically determining a measurement threshold, which can efficiently and accurately detect the threshold of the output light intensity of the system; the invention also provides a method for the optical fiber code recognition system to determine the measurement threshold value by itself.

According to an embodiment of the first aspect of the invention, the optical fiber code identification system for self-determining the measurement threshold comprises: the light source module is used for outputting a light wave signal for testing; the circulator is provided with a first port, a second port and a third port, and the first port is connected with the output end of the light source module; the input end of the optical splitter is connected with the second port of the circulator, the optical splitter is provided with a main light splitting end and a secondary light splitting end, and the main light splitting end is used for connecting optical fibers with optical fiber codes; the reflecting mirror is connected with the secondary light splitting end of the light splitter; the input end of the waveform detector is connected with the third port of the circulator; and the main controller is electrically connected with the light source module and the waveform detector respectively.

The optical fiber code identification system for self-determining the measurement threshold according to the first embodiment of the invention has at least the following beneficial effects: the system can determine an initial light intensity threshold according to the reflected light wave and the light splitting ratio, and then calculate the light intensity threshold of the test point on the optical fiber.

According to some embodiments of the first aspect of the present invention, the light source module comprises a driver capable of adjusting an output current and a light source driven by the driver, and the driver is electrically connected to the main controller.

According to some embodiments of the first aspect of the present invention, the light source employs a narrow bandwidth light source or a pulsed light source.

According to some embodiments of the first aspect of the present invention, the light source module further includes a first SOA optical switch electrically connected to the main controller, the first SOA optical switch is connected between the light source and the first port of the circulator, and the light source is a high bandwidth light source; and a second SOA optical switch is arranged between the input end of the waveform detector and the third port of the circulator and is electrically connected with the main controller.

According to some embodiments of the first aspect of the present invention, the splitting ratio of the primary splitting end to the secondary splitting end of the splitter is 99: 1.

According to some embodiments of the first aspect of the present invention, the waveform detector employs a demodulator for achieving separation and wavelength measurement of light waves.

According to some embodiments of the first aspect of the present invention, the master controller is an FPGA controller.

According to the second aspect of the invention, the method for self-determining the measurement threshold value by the optical fiber code identification system comprises the following steps: the light wave output is divided into two paths by using a light splitter, wherein one path of light wave output is output to an optical fiber with optical fiber coding, and the other path of light wave output is output to a reflector; collecting the intensity of the light wave signal reflected by the reflector, and calculating the initial light wave signal intensity according to the light splitting output proportion of the light splitter; and calculating the threshold value of the optical fiber measuring point by using the initial light wave signal intensity and the attenuation coefficient of the optical fiber, wherein the attenuation coefficient is determined by the material of the optical fiber and the length of the optical fiber.

The method for self-determining the measurement threshold value by the optical fiber code identification system according to the second embodiment of the invention has at least the following advantages: the system can determine an initial light intensity threshold according to the reflected light wave and the light splitting ratio, and then calculate the light intensity threshold of the test point on the optical fiber.

According to some embodiments of the second aspect of the present invention, collecting the intensity of the lightwave signal reflected by the mirror comprises: acquiring a reflected continuous spectrum; determining the position of the light wave signal reflected by the reflector from the continuous spectrum; and acquiring the intensity of the light wave signal at the position of the light wave signal reflected by the reflector.

According to some embodiments of the second aspect of the present invention, the threshold F1 of the fiber measurement point is F0/(10^ (r/10)), where F0 is defined as the initial lightwave signal strength and r is the attenuation coefficient of the fiber.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic diagram of an optical fiber encoding identification system according to an embodiment of the first aspect of the present invention;

FIG. 2 is a flow chart of a method for self-determining a measurement threshold value by a fiber code identification system according to a second aspect of the present invention;

FIG. 3 is a spectrum diagram of the reflection position of the mirror according to the embodiment of the second aspect of the present invention;

FIG. 4 is a graph of a spectrum of encoded reflection positions of an optical fiber according to an embodiment of the second aspect of the present invention.

Reference numerals:

the light source module 100, the driver 110, the light source 120, the first SOA optical switch 130, and the second SOA optical switch 140;

circulator 200, beam splitter 300, optical fiber code 400, optical fiber 500, mirror 600, waveform detector 700, and main controller 800.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.