阅读说明：本技术 一种膜式光纤编码识别系统及方法 (Membrane type optical fiber code identification system and method ) 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：本发明公开了一种膜式光纤编码识别系统,包括：光源模块,用于输出测试用的光波信号；环形器,所述环形器具有第一端口、第二端口、第三端口,所述第一端口与所述光源模块的输出端连接；光纤,所述光纤输入端与所述环形器的第二端口连接；膜式光纤编码,所述膜式光纤编码与所述光纤的输出端连接；波形探测器,所述波形探测器的输入端与所述环形器的第三端口连接；主控制器,分别与所述光源模块、波形探测器电性连接。采用与光纤可拆卸的膜式光纤编码,安装使用灵活,不占用光纤长度,厚度小,成本低,相比传统线条状光栅的纤式光纤编码,平面状的膜式光纤编码反射面积更大且均匀,能够提高光线编码识别精度,且可直接贴附于外部通信器件。(The invention discloses a membrane type optical fiber coding and identifying system, which 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 optical fiber input end is connected with the second port of the circulator; the film type optical fiber code is connected with the output end of the optical fiber; 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. Adopt with optic fibre detachable diaphragm type optic fibre coding, the installation is used in a flexible way, does not occupy optic fibre length, and thickness is little, and is with low costs, compares traditional linear grating's fine optic fibre coding, and planar diaphragm type optic fibre coding reflection area is bigger and even, can improve light coding discernment precision, and can directly attach in outside communication device.)

1. A membrane type optical fiber coding identification system is characterized in that: 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 fiber (300), the input end of the optical fiber (300) being connected with the second port of the circulator (200);

a film type optical fiber code (400), wherein the film type optical fiber code (400) is connected with the output end of the optical fiber (300);

the input end of the waveform detector (500) is connected with the third port of the circulator (200);

and the main controller (600) is respectively electrically connected with the light source module (100) and the waveform detector (500).

2. The film-type optical fiber code identification system according to claim 1, characterized in that: the film type optical fiber code (400) is a unique optical identification unit formed by sequentially combining a plurality of reflecting films and/or transmitting films.

3. The film-type optical fiber code identification system according to claim 2, wherein: the film type optical fiber code (400) is formed by overlapping a plurality of reflecting films (401) with different wavelengths.

4. The film-type optical fiber code identification system according to claim 1, characterized in that: 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 (600).

5. The film-type optical fiber code identification system according to claim 4, wherein: the light source (120) adopts a narrow-bandwidth light source or a pulse light source.

6. The film-type optical fiber code identification system according to claim 1, characterized in that: the light source module (100) further comprises a first SOA optical switch (130) electrically connected with the main controller (600), 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 (500) and the third port of the circulator (200), and the second SOA optical switch (140) is electrically connected with the main controller (600).

7. The film-type optical fiber code identification system according to claim 1, characterized in that: the waveform detector (500) adopts a demodulator for realizing the separation of light waves and the measurement of wavelengths.

8. The film-type optical fiber code identification system according to claim 1, characterized in that: the main controller (600) adopts an FPGA controller.

9. A membrane type optical fiber code identification method is characterized in that: comprises the following steps

Outputting the light wave from the circulator to the optical fiber;

the light wave is transmitted to the film type optical fiber code through the optical fiber, and the film type optical fiber code reflects the light wave with specific wavelength;

the reflected light waves sequentially pass through the optical fiber and the circulator to the waveform detector;

the waveform detector acquires the reflected light waves and feeds the reflected light waves back to the main controller;

and the main controller acquires the film type optical fiber code according to the wavelength of the reflected light wave.

10. The film-type optical fiber coding identification method according to claim 9, wherein: the film type optical fiber code is formed by overlapping a plurality of reflecting films with different wavelengths.

Technical Field

The invention relates to the field of optical fiber communication, in particular to a membrane type optical fiber code identification system and a membrane type optical fiber code identification method.

Background

In the field of optical fiber communication, an optical fiber code consists of a plurality of optical fiber gratings with different wavelengths, and a light code identification system is an optical detection system for accurately identifying the wavelengths of the optical fiber gratings. The existing optical fiber codes are linear gratings directly formed in the fiber core of the optical cable, the optical fiber codes are not flexible to use depending on the length of the optical cable, different optical fibers need to be formed into different grating codes, the optical fiber codes with one end length are required to be formed by the optical fibers when the optical fiber codes are matched with an external communication device, and the overall length and the material cost of a product are increased.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a membrane type optical fiber coding and identifying system which can be flexibly used, has low cost and is easy to be matched with an external communication device; the invention also provides a membrane type optical fiber code identification method.

According to an embodiment of the first aspect of the invention, a film type optical fiber code identification system 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 optical fiber input end is connected with the second port of the circulator; the film type optical fiber code is connected with the output end of the optical fiber; 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 film type optical fiber coding identification system according to the first embodiment of the invention has at least the following advantages: adopt with optic fibre detachable diaphragm type optic fibre coding, the installation is used in a flexible way, does not occupy optic fibre length, and thickness is little, and is with low costs, compares traditional linear grating's fine optic fibre coding, and planar diaphragm type optic fibre coding reflection area is bigger and even, can improve light coding discernment precision, and can directly attach in outside communication device.

According to some embodiments of the first aspect of the present invention, the film-type optical fiber is encoded as a unique optical identification unit consisting of a plurality of reflective and/or transmissive films combined in sequence.

According to some embodiments of the first aspect of the present invention, the film-type optical fiber code is formed by overlapping a plurality of reflective films of different wavelengths.

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 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 embodiment of the second aspect of the invention, the method for self-determining the measurement threshold value by the light code recognition system comprises the following steps: outputting the light wave from the circulator to the optical fiber; the light wave is transmitted to the film type optical fiber code through the optical fiber, and the film type optical fiber code reflects the light wave with specific wavelength; the reflected light waves sequentially pass through the optical fiber and the circulator to the waveform detector; the waveform detector acquires the reflected light waves and feeds the reflected light waves back to the main controller; and the main controller acquires the film type optical fiber code according to the wavelength of the reflected light wave.

The method for self-determining the measurement threshold value by the light ray code recognition system according to the second embodiment of the invention has at least the following advantages: adopt with optic fibre detachable diaphragm type optic fibre coding, the installation is used in a flexible way, does not occupy optic fibre length, and thickness is little, and is with low costs, compares traditional linear grating's fine optic fibre coding, and planar diaphragm type optic fibre coding reflection area is bigger and even, can improve light coding discernment precision, and can directly attach in outside communication device.

According to some embodiments of the second aspect of the present invention, the film-type optical fiber code is formed by overlapping a plurality of reflective films of different wavelengths.

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 a light ray code recognition system according to an embodiment of the first aspect of the present invention;

FIG. 2 is a block diagram of a film fiber coding structure according to an embodiment of the first aspect of the present invention;

FIG. 3 is a flowchart of a light encoding and recognizing method according to a 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, optical fiber 300, film type optical fiber code 400, reflecting film 401, waveform detector 500 and main controller 600.

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.