A membrane type optical fiber coding recognition system and method

Abstract

The present invention discloses a film-type optical fiber coding recognition system, comprising: a light source module for outputting an optical wave signal for testing; a circulator having a first port, a second port, and a third port, wherein the first port is connected to the output end of the light source module; an optical fiber, the input end of the optical fiber is connected to the second port of the circulator; a film-type optical fiber code, the film-type optical fiber code is connected to the output end of the optical fiber; a waveform detector, the input end of the waveform detector is connected to the third port of the circulator; and a main controller electrically connected to the light source module and the waveform detector respectively. The film-type optical fiber code that is detachable from the optical fiber is flexible in installation and use, does not occupy the length of the optical fiber, has a small thickness and low cost. Compared with the fiber-type optical fiber code of the traditional linear grating, the planar film-type optical fiber code has a larger and more uniform reflection area, can improve the accuracy of optical fiber coding recognition, and can be directly attached to external communication devices.

Description

Technical Field

[0001] The present invention relates to the field of optical fiber communication, and particularly to a film-type optical fiber coding and identification system and method. Background Art

[0002] In the field of optical fiber communication, an optical fiber code is composed of multiple fiber gratings with different wavelengths, and an optical fiber coding and identification system is an optical detection system for accurately identifying the wavelengths of the fiber gratings. Existing optical fiber codes are all linear gratings directly formed in the core of an optical cable, which rely on the length of the optical cable itself and are not very flexible to use. Different optical fibers require different grating codes to be formed. When cooperating with external communication devices, a certain length of optical fiber needs to be used to form the optical fiber code, increasing the overall length and material cost of the product. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. For this purpose, the present invention provides a film-type optical fiber coding and identification system, which can be used flexibly, has low cost and is easy to cooperate with external communication devices; the present invention also provides a film-type optical fiber coding and identification method.

[0004] A film-type optical fiber coding and identification system according to an embodiment of the first aspect of the present invention includes: a light source module for outputting a light wave signal for testing; a circulator having a first port, a second port, and a third port, the first port being connected to the output end of the light source module; an optical fiber, the input end of the optical fiber being connected to the second port of the circulator; a film-type optical fiber code, the film-type optical fiber code being connected to the output end of the optical fiber; a waveform detector, the input end of the waveform detector being connected to the third port of the circulator; and a main controller electrically connected to the light source module and the waveform detector respectively.

[0005] The film-type optical fiber coding and identification system according to the first embodiment of the present invention has at least the following beneficial effects: The film-type optical fiber code that is detachable from the optical fiber is flexible to install and use, does not occupy the length of the optical fiber, has a small thickness and low cost. Compared with the traditional fiber-type optical fiber code with a linear grating, the planar film-type optical fiber code has a larger and more uniform reflection area, can improve the accuracy of optical fiber coding identification, and can be directly attached to external communication devices.

[0006] According to some embodiments of the first aspect of the present invention, the film-type optical fiber code is a unique optical identification unit composed of a plurality of reflection films and / or transmission films combined in sequence.

[0007] 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 reflection films with different wavelengths.

[0008] According to some embodiments of the first aspect of the present invention, the light source module includes a driver with adjustable output current and a light source driven by the driver, and the driver is electrically connected to the main controller.

[0009] According to some embodiments of the first aspect of the present invention, the light source uses a narrow bandwidth light source or a pulsed light source.

[0010] 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 uses a large bandwidth light source; a second SOA optical switch is provided between the input end of the waveform detector and the third port of the circulator, and the second SOA optical switch is electrically connected to the main controller.

[0011] According to some embodiments of the first aspect of the present invention, the waveform detector uses a demodulator for separating light waves and measuring wavelengths.

[0012] According to some embodiments of the first aspect of the present invention, the main controller uses an FPGA controller.

[0013] A method for a light ray coding recognition system according to an embodiment of the second aspect of the present invention to self-determine a measurement threshold includes the following steps: outputting light waves from the circulator to an optical fiber; the light waves are transmitted from the optical fiber to a film type optical fiber code, and the film type optical fiber code reflects light waves of a specific wavelength; the reflected light waves pass through the optical fiber and the circulator to the waveform detector in sequence; the waveform detector acquires the reflected light waves and feeds them back to the main controller; the main controller measures the wavelengths of the reflected light waves to obtain the film type optical fiber code.

[0014] The method for a light ray coding recognition system according to the second embodiment of the present invention to self-determine a measurement threshold has at least the following beneficial effects: adopting a film type optical fiber code that is detachable from the optical fiber, it is flexible to install and use, does not occupy the length of the optical fiber, has a small thickness and low cost. Compared with the fiber type optical fiber code of a traditional linear grating, the planar film type optical fiber code has a larger and more uniform reflection area, can improve the accuracy of light ray coding recognition, and can be directly attached to external communication devices.

[0015] According to some embodiments of the second aspect of the present invention, the film type optical fiber code is formed by overlapping multiple reflection films with different wavelengths.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present invention. Description of the Drawings

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and be readily understood from the following description of embodiments in conjunction with the accompanying drawings, where:

[0018] Figure 1 Schematic diagram of the light encoding and recognition system according to the embodiment of the first aspect of the present invention;

[0019] Figure 2 Structural diagram of the film optical fiber encoding according to the embodiment of the first aspect of the present invention;

[0020] Figure 3 Flowchart of the light encoding and recognition method according to the embodiment of the second aspect of the present invention.

[0021] Reference numerals:

[0022] Light source module 100, driver 110, light source 120, first SOA optical switch 130, second SOA optical switch 140;

[0023] Circulator 200, optical fiber 300, film optical fiber encoding 400, reflective film 401, waveform detector 500, main controller 600. Detailed implementation manners

[0024] The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0025] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as up, down, front, back, left, right, etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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.

[0026] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installation, connection, etc. should be understood in a broad sense. Those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific content of the technical solution.

[0027] Reference Figure 1As shown in the figure, a film - type fiber - optic coding recognition system according to an embodiment of the first aspect of the present technical solution includes: a light - source module 100 for outputting a light - wave signal for testing; a circulator 200 having a first port, a second port, and a third port, wherein the first port is connected to the output end of the light - source module 100; an optical fiber 300, the input end of the optical fiber 300 is connected to the second port of the circulator 200; a film - type fiber - optic code 400, the film - type fiber - optic code 400 is connected to the output end of the optical fiber 300; a waveform detector 500, the input end of the waveform detector 500 is connected to the third port of the circulator 200; a main controller 600, electrically connected to the light - source module 100 and the waveform detector 500 respectively.

[0028] Its working process is as follows: the main controller 600 controls the light - source module 100 to output a light - wave signal, which enters through the first port of the circulator 200, is output from the second port to the optical fiber 300 and the film - type fiber - optic code 400. The film - type fiber - optic code 400 reflects light waves of a specific wavelength, and successively passes through the optical fiber 300, the second port of the circulator 200, and the third port of the circulator 200. The waveform detector 500 acquires the reflected light waves and feeds them back to the main controller 600; the main controller 600 analyzes the wavelength of the reflected light waves to obtain the film - type fiber - optic code.

[0029] As described above, the film - type fiber - optic coding recognition system according to the first embodiment of the present invention uses a film - type fiber - optic code that is detachable from the optical fiber, is flexible in installation and use, does not occupy the length of the optical fiber, has a small thickness, and a low cost. Compared with the traditional line - shaped grating fiber - optic code, the planar film - type fiber - optic code has a larger and more uniform reflection area, can improve the accuracy of light - coding recognition, and can be directly attached to external communication devices.

[0030] In some embodiments of the first aspect of the present invention, the film - type fiber - optic code 400 is a unique optical recognition unit composed of a plurality of reflective films and / or transmissive films combined in sequence.

[0031] As Figure 2 As shown in the figure, in some embodiments of the first aspect of the present invention, the film - type fiber - optic code 400 is formed by overlapping a plurality of reflective films 401 with different wavelengths to form a unique wavelength combination.

[0032] In some embodiments of the first aspect of the present invention, the light - source module 100 includes a driver 110 with adjustable output current and a light source 120 driven by the driver 110. The driver 110 is electrically connected to the main controller 600, the driver 110 supplies power to the light source, the driver 110 is controlled by the main controller 600, and according to the calculated light - intensity threshold of the test point on the optical fiber, it controls its output current, and further controls the light - emitting intensity of the light source 120.

[0033] In some embodiments of the first aspect of the present invention, the light source 120 employs a narrow-bandwidth light source or a pulsed light source.

[0034] In view of the relatively large wavelength band required for optical fiber coding, in some embodiments of the first aspect of the present invention, the light source 120 employs a large-bandwidth light source. The light source module 100 further includes a first SOA optical switch 130 electrically connected to 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. A second SOA optical switch 140 is provided between the input end of the waveform detector 500 and the third port of the circulator 200. The second SOA optical switch 140 is electrically connected to the main controller 600.

[0035] The two SOA optical switches, namely the first SOA optical switch 130 and the second SOA optical switch 140, have the functions of high-speed opening and closing, and at the same time have the function of optical wave amplification. The two SOAs form the pulse control of the transmitted and received optical waves, realizing the input of optical waves into the optical fiber, and at the same time receiving the backward reflection and scattered optical waves of the optical fiber. The time difference between the opening and closing of the two is multiplied by the speed of light to obtain the optical intensity transmission distance.

[0036] In some embodiments of the first aspect of the present invention, the waveform detector 500 preferably employs a demodulator for separating optical waves and measuring wavelengths.

[0037] In some embodiments of the first aspect of the present invention, the main controller 600 preferably employs an FPGA controller.

[0038] As Figure 3 shown, it is the process of outputting optical waves from the circulator to the optical fiber in the embodiment of the second aspect of the present invention; the optical waves are transmitted from the optical fiber to the membrane optical fiber coding, and the membrane optical fiber coding reflects optical waves of a specific wavelength; the reflected optical waves pass through the optical fiber and the circulator to the waveform detector in sequence; the waveform detector acquires the reflected optical waves and feeds them back to the main controller; the main controller measures the wavelength of the reflected optical waves to obtain the membrane optical fiber coding.

[0039] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0040] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A membrane-type optical fiber coding recognition system, characterized in that: Including: A light source module (100) for outputting an optical wave signal for testing; An optical circulator (200) having a first port, a second port, and a third port, wherein the first port is connected to the output end of the light source module (100); An optical fiber (300), the input end of the optical fiber (300) is connected to the second port of the optical circulator (200); A film optical fiber encoder (400), the film optical fiber encoder (400) is connected to the output end of the optical fiber (300); A waveform detector (500), the input end of the waveform detector (500) is connected to the third port of the optical circulator (200); A main controller (600) electrically connected to the light source module (100) and the waveform detector (500) respectively; The film optical fiber encoder (400) is a unique optical recognition unit composed of a plurality of reflection films combined in sequence; the film optical fiber encoder (400) is formed by overlapping a plurality of reflection films (401) with different wavelengths, the film optical fiber encoder (400) is planar, and is detachably and directly attached to an external communication device with the optical fiber (300).

2. The membrane optical fiber coding recognition system according to claim 1, wherein: The light source module (100) includes a driver (110) for adjusting the output current and a light source (120) driven by the driver (110), and the driver (110) is electrically connected to the main controller (600).

3. The membrane optical fiber coding recognition system according to claim 2, characterized in that: The light source (120) uses a narrow-bandwidth light source or a pulsed light source.

4. The membrane optical fiber coding and identification system according to claim 1, characterized in that: The light source module (100) further includes a first SOA optical switch (130) electrically connected to the main controller (600), the first SOA optical switch (130) is connected between the light source (120) and the first port of the optical circulator (200), and the light source (120) uses a large-bandwidth light source; a second SOA optical switch (140) is arranged between the input end of the waveform detector (500) and the third port of the optical circulator (200), and the second SOA optical switch (140) is electrically connected to the main controller (600).

5. The membrane optical fiber coding recognition system according to claim 1, wherein: The waveform detector (500) uses a demodulator for separating and measuring the wavelength of the optical wave.

6. The membrane optical fiber coding recognition system according to claim 1, wherein: The main controller (600) uses an FPGA controller.

7. A film optical fiber coding recognition method, applied to the film optical fiber coding recognition system according to any one of claims 1 to 6, characterized in that: Including the following steps Output the optical wave from the optical circulator to the optical fiber; The optical wave is transmitted from the optical fiber to the film optical fiber encoder, and the film optical fiber encoder reflects the optical wave of a specific wavelength; The reflected optical wave passes through the optical fiber and the optical circulator to the waveform detector in sequence; The waveform detector acquires the reflected optical wave and feeds it back to the main controller; The main controller measures the wavelength of the reflected optical wave to obtain the film optical fiber encoder.

8. A membrane optical fiber coding and identification method according to claim 7, characterized in that: The film optical fiber encoder is formed by overlapping a plurality of reflection films with different wavelengths.

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