Decoding system and method for all-optical networking and optical gateway

Abstract

The invention provides an all-optical networking and optical gateway decoding system and method, and relates to the technical field of optical fiber communication, and the system comprises a first depolarization splitting prism, a second depolarization splitting prism, a pre-decoding device and a decoding device. The first depolarization splitting prism is used for splitting incident light into a first light beam and a second light beam to be emitted; the second depolarization splitting prism is used for splitting the second light beam into a third light beam and a fourth light beam to be emitted; the pre-decoding device is used for pre-decoding the third light beam and the fourth light beam to obtain a pre-decoded light beam, the pre-decoding device comprises a first half-wave plate, a second half-wave plate and an electric control component selector, the deflection angles of the first half-wave plate and the second half-wave plate are different, and the delay amount of the electric control component selector is multiple; and the decoding device is used for decoding the incident light according to the first light beam and the pre-decoded light beam. The method can reduce the calculation pressure of the system, reduce the complexity of the system and improve the reliability of the system.

Description

Technical Field

[0001] The present invention relates to the technical field of optical fiber communication, and in particular to a decoding system and method for all-optical networking and an optical gateway. Background Art

[0002] All-optical FTTR (Fiber to the Room) and home gateways are both the endpoint of fiber-to-the-home (FTTH) and the starting point of the home local area network (LAN). With the widespread adoption of gigabit fiber and the development of higher-speed fiber-optic communications, higher requirements are being placed on FTTRs and home gateways. The decoding components of FTTRs and gateways utilize discrete BOSA optoelectronic devices and their driver chips to perform optical-to-electrical conversion and decoding of optical fiber laser signals.

[0003] Specifically, the existing decoding systems for optical fiber communications have the following decoding schemes for lasers: (1) polarization light modulation method, that is, in the optical path, a mechanical rotating polarizer and a phase retarder are used to modulate the light to be measured and measure the modulated light intensity. However, this will introduce mechanical errors, and Fourier calculations are required in the calculation process, which is computationally intensive and places high demands on the performance of the decoding system; (2) amplitude division scheme, which requires multiple reflections and refractions of the light to be measured to divide the light to be measured into four beams, which places extremely high demands on the optical path. Finally, four optical detectors are used to simultaneously complete the measurement of the laser Stokes parameters to obtain decoding information. This scheme has high requirements on the working environment of the system and requires a large number of detectors. Summary of the Invention

[0004] The present invention provides a decoding system and method for all-optical networking and optical gateway, which are used to solve the defects of high computational pressure and complex system in the decoding system in the prior art.

[0005] The present invention provides a decoding system for all-optical networking and optical gateway, comprising:

[0006] A first depolarizing beam splitter prism, a second depolarizing beam splitter prism, a pre-decoding device, and a decoding device;

[0007] A first depolarizing beam splitter prism is used to split the incident light into a first light beam and a second light beam for emission;

[0008] a second depolarizing beam splitter prism, configured to split the second light beam into a third light beam and a fourth light beam for emission;

[0009] a predecoding device, configured to predecode the third and fourth light beams to obtain predecoded light beams, the predecoding device comprising a first half-wave plate, a second half-wave plate, and an electrically controlled component selector, wherein the first half-wave plate and the second half-wave plate have different deflection angles, and the electrically controlled component selector has multiple delay amounts;

[0010] A decoding device is used to decode the incident light according to the first light beam and the pre-decoding light beam.

[0011] Optionally, the first half-wave plate in the pre-decoding device is used to deflect the third light beam, the second half-wave plate is used to deflect the fourth light beam, and the electrically controlled component selector is used to determine the pre-decoding light beam based on the deflected third light beam and the deflected fourth light beam.

[0012] Optionally, a polarization beam splitter prism is further included, and the polarization beam splitter prism is used to evenly split the pre-decoding light beam into a fifth light beam and a sixth light beam for emission, and the emission directions of the fifth light beam and the sixth light beam are perpendicular to each other.

[0013] Optionally, the light splitting ratios of the first depolarization beam splitter prism and the second depolarization beam splitter prism are both 1:1.

[0014] Optionally, the decoding device includes a voltage value detection module and a calculation module, the voltage value detection module is used to determine a first voltage value based on the first light beam and determine a second voltage value based on the pre-decoding light beam; the calculation module is used to decode the incident light according to the first voltage value and the second voltage value.

[0015] Optionally, the voltage value detection module includes a homodyne detection module and a first photodiode; the first photodiode is used to determine a first voltage value according to the first light beam, and the homodyne detection module is used to determine a second voltage value according to the pre-decoding light beam.

[0016] Optionally, the homodyne detection module includes a second photodiode, a third photodiode and an operational amplifier, the second photodiode is used to convert the fifth light beam into a first electrical signal, the third photodiode is used to convert the sixth light beam into a second electrical signal, and the operational amplifier is used to determine a second voltage value based on the first electrical signal and the second electrical signal.

[0017] Optionally, the deflection angle of the first half-wave plate is π / 8, and the deflection angle of the second half-wave plate is 0.

[0018] Optionally, the delay amount of the electronically controlled component selector is 0 and π / 2.

[0019] The present invention also provides a decoding method for all-optical networking and optical gateway, comprising:

[0020] Obtaining a first voltage value and a second voltage value; wherein the second voltage value includes a voltage value of the third light beam when the delay of the electronically controlled component selector is 0, recorded as a third voltage value, a voltage value of the third light beam when the delay of the electronically controlled component selector is π / 2, recorded as a fourth voltage value, and a voltage value of the fourth light beam when the delay of the electronically controlled component selector is 0, recorded as a fifth voltage value;

[0021] Divide the first voltage value by 2 to obtain a base voltage value;

[0022] The first voltage value, the third voltage value, the fourth voltage value, and the fifth voltage value are respectively divided by the basic voltage value to obtain a decoded value of the incident light.

[0023] The present invention provides a decoding system and method for an all-optical network and an optical gateway, wherein the system includes: a first depolarizing beam splitter prism, a second depolarizing beam splitter prism, a pre-decoding device, and a decoding device; the first depolarizing beam splitter prism is used to split incident light into a first beam and a second beam for emission; the second depolarizing beam splitter prism is used to split the second beam into a third beam and a fourth beam for emission; the pre-decoding device is used to pre-decode the third beam and the fourth beam to obtain a pre-decoded beam, the pre-decoding device includes a first half-wave plate, a second half-wave plate, and an electrically controlled component selector, the first half-wave plate and the second half-wave plate have different deflection angles, and the electrically controlled component selector has multiple delay amounts; the decoding device is used to decode the incident light according to the first beam and the pre-decoded beam. That is, the present invention utilizes two half-wave plates with different deflection angles in combination with a subsequent electrically controlled component selector to perform pre-decoding at the physical level, reducing the system's computational pressure, and the electrically controlled component selector has multiple delay amounts, which can multiplex a single optical path to detect multiple components, thereby completing the decoding of the beam, reducing system complexity, and increasing system reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 This is a structural diagram of the decoding system of the all-optical networking and optical gateway provided by the present invention;

[0026] Figure 2 This is a flow chart of the decoding method for all-optical networking and optical gateway provided by the present invention;

[0027] Figure 3 It is a structural schematic diagram of the electronic device provided by the present invention.

[0028] Reference numerals:

[0029] 1-first depolarizing beam splitter prism, 2-second depolarizing beam splitter prism, 3-first half-wave plate, 4-second half-wave plate, 5-electrically controlled component selector, 6-polarizing beam splitter prism, 7-second photodiode, 8-third photodiode, 9-first photodiode, 10-operational amplifier. DETAILED DESCRIPTION

[0030] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0031] The following combination Figure 1-Figure 3 The present invention describes the decoding system and method of all-optical networking and optical gateway.

[0032] Figure 1 This is a structural diagram of the decoding system of the all-optical networking and optical gateway provided by the present invention, such as Figure 1 As shown, a decoding system for all-optical networking and optical gateway includes:

[0033] A first depolarizing beam splitter prism 1, a second depolarizing beam splitter prism 2, a pre-decoding device, and a decoding device;

[0034] A first depolarizing beam splitter prism 1 is used to split the incident light into a first light beam and a second light beam for emission;

[0035] A second depolarizing beam splitter prism 2, used for splitting the second light beam into a third light beam and a fourth light beam for emission;

[0036] a predecoding device for predecoding the third and fourth light beams to obtain predecoded light beams, the predecoding device comprising a first half-wave plate 3, a second half-wave plate 4, and an electrically controlled component selector 5, wherein the first half-wave plate 3 and the second half-wave plate 4 have different deflection angles, and the electrically controlled component selector 5 has multiple delay amounts;

[0037] A decoding device is used to decode the incident light according to the first light beam and the pre-decoding light beam.

[0038] The present invention adopts the method of splitting the light beam and fixing wave plates at different angles to avoid introducing mechanical movement. It adopts the electronic control method at the detection end and reuses one optical path to detect multiple parameters. It can not only simplify the detection circuit, but also reduce the complexity of the system and improve the system, thereby completing the signal decoding and extracting effective information.

[0039] In a specific embodiment, the splitting ratios of the first depolarization beam splitter (first NPBS) 1 and the second depolarization beam splitter (second NPBS) 2 are both 1:1.

[0040] It should be noted that the first depolarization beam splitter prism 1 and the second depolarization beam splitter prism 2 can evenly split an incident beam into two beams without changing the polarization state of the light, that is, without changing the information carried by the light.

[0041] In a specific embodiment, the first half-wave plate 3 in the pre-decoding device is used to deflect the third light beam, the second half-wave plate 4 is used to deflect the fourth light beam, and the electrically controlled component selector 5 is used to determine the pre-decoding light beam based on the deflected third light beam and the deflected fourth light beam.

[0042] The present invention uses two serial 1:1 NPBSs to split a beam of light to be measured into three beams. One beam can directly measure the total light intensity. The other two beams pass through half-wave plates at different preset angles to obtain two beams of light to be measured. Pre-decoding is performed to reduce the computational complexity of the entire system, without the need for mechanical moving parts to obtain two beams of light.

[0043] It should be mentioned that the first half-wave plate 3 and the second half-wave plate 4 are The wave plate delays the phase of light, and the delayed phase is recorded as M θ , where θ is the angle between the fast axis of the wave plate and the horizontal direction, that is, the polarization angle.

[0044] In a specific embodiment, the deflection angle of the first half-wave plate 3 is π / 8, and the deflection angle of the second half-wave plate 4 is 0.

[0045] It should be noted that the electrically controlled component selector 5 utilizes the Pockels electro-optic effect to change the refractive index delay of light. After voltage is applied, the delay δ can be controlled by the voltage, where δ = K*V, V is the applied voltage, and K is a constant coefficient. The specific value is calculated based on the size of the electro-optical crystal used to make the electrically controlled component selector.

[0046] In a specific embodiment, the delay amount δ of the electronically controlled component selector 5 is 0 and / or π / 2.

[0047] The present invention measures three light beam components by multiplexing one detection light path through an electrically controlled component selector, thereby reducing system complexity.

[0048] In addition, the present invention uses an electrically controlled component selector to avoid mechanical errors caused by mechanically rotating the wave plate. Moreover, compared with mechanical rotation, the electronic control method can greatly improve the test speed, test accuracy and system reliability.

[0049] In a specific embodiment, a polarization beam splitter prism 6 is further included, and the polarization beam splitter prism 6 is used to evenly split the pre-decoding light beam into a fifth light beam and a sixth light beam for emission, and the emission directions of the fifth light beam and the sixth light beam are perpendicular to each other.

[0050] It should be noted that the polarization beam splitter 6 (PBS) can evenly split an incident light beam into two mutually perpendicular light beams, one of which is in the same direction as the incident light. The mathematical change of the light is recorded as M. PBS-P , another beam is emitted perpendicular to the incident light, and its mathematical change to light is recorded as M PBS-S .

[0051] In a specific embodiment, the decoding device includes a voltage value detection module and a calculation module, the voltage value detection module is used to determine a first voltage value based on the first light beam and determine a second voltage value based on the pre-decoding light beam; the calculation module is used to decode the incident light according to the first voltage value and the second voltage value.

[0052] It should be noted that the computing module in the present invention may be an electronic device, a computer storage medium or a computer program product.

[0053] In a specific embodiment, the voltage value detection module includes a homodyne detection module and a first photodiode 9; the first photodiode 9 is used to determine a first voltage value based on the first light beam, and the homodyne detection module is used to determine a second voltage value based on the pre-decoding light beam.

[0054] In a specific embodiment, the homodyne detection module includes a second photodiode 7, a third photodiode 8 and an operational amplifier 10, the second photodiode 7 is used to convert the fifth light beam into a first electrical signal, the third photodiode 8 is used to convert the sixth light beam into a second electrical signal, and the operational amplifier 10 is used to determine a second voltage value based on the first electrical signal and the second electrical signal.

[0055] Based on the above all-optical networking and optical gateway decoding system structure, the decoding principle of the present invention is briefly described below. Figure 1 :

[0056] First, the present invention uses the first NPBS to convert the incident light S to be decoded in =[S0 S1 S2 S3] T The two beams are divided into two beams. Since the two beams are the same, they can both be recorded as S in1 =[S0 S1 S2 S3] T , this operation only splits the light beam, and the information it carries remains unchanged.

[0057] The optical path [1] can directly detect the voltage value through the first photodiode, which is recorded as V0, that is, the S0 component is detected.

[0058] Light path [2] passes through the second NPBS again, and one of the S in1 It is divided into two beams again, and the information it carries remains unchanged, denoted as S in2 =[S0 S1 S2 S3] T , the two beams of light pass through two different polarization angles θ The wave plate and the subsequent electronically controlled component selector realize physical pre-decoding. Finally, after passing through the PBS and homodyne detection module, the voltage detection value is obtained. The final formula is:

[0059] S out =(M PBS-P -M PBS-P )*M select *M θ *S in

[0060] =S1*cos4θ*cosδ+S2*sin4θ*cosδ+S3*sinδ. Among them, S out

[0061] is the total emitted light, M select is the output matrix of the electronically controlled component selector, S in is the initial incident light (ie, the incident light received by the first depolarization beam splitter), S1 is the first Stokes parameter component of the incident light to be decoded, S2 is the second Stokes parameter component of the incident light to be decoded, and S3 is the third Stokes parameter component of the incident light to be decoded.

[0062] When the component selector selects to measure the optical path [3], substitute θ=π8 into the above formula (final formula), and we can get S out,1 =S2*cosδ+S3*sinδ.

[0063] When δ=0, that is, V=0, S out,1 =S2, the voltage detected at this time corresponds to V2;

[0064] Among them, S out,1 is the outgoing light of a certain branch, here it refers to the outgoing light when optical path [3], δ = 0, V = 0, and the same applies below.

[0065] When δ=π / 2, that is, V=π / (2*K), S out,1 =S3, the voltage detected at this time corresponds to V3;

[0066] Similarly, when the component selector selects to measure the optical path [4], substituting θ = 0 into the above formula, we can get S out,1=S1*cosδ+S3*sinδ. When δ=0, that is, V=0, S out,1 =S1, the voltage detected at this time corresponds to V1;

[0067] The above combination conditions can be more clearly explained through the following table:

[0068]

[0069]

[0070] Since the light is split once when detecting V0 and twice when detecting V1, V2, and V3, it is necessary to divide V0 by 2 to obtain the basic voltage value V base , and then divide the detected 4 groups of voltage values by V base , we can get the normalized parameter, namely [1 V1 / V base V2 / V base V3 / V base ] T It can be seen that after the decoding system, the optical signal S to be decoded in =[S0 S1 S2 S3] T Decoding measurements are completed.

[0071] The decoding method of the all-optical networking and optical gateway provided by the present invention is described below. The decoding method of the all-optical networking and optical gateway described below and the decoding system of the all-optical networking and optical gateway described above can be referenced to each other.

[0072] The present invention also provides a decoding method for all-optical networking and optical gateway, which is applied to the above-mentioned calculation module, and the specific steps are as follows: Figure 2 Shown, including:

[0073] Step 201: Obtain a first voltage value and a second voltage value; the second voltage value includes the voltage value of the third light beam when the delay amount of the electronically controlled component selector is 0, recorded as the third voltage value, the voltage value of the third light beam when the delay amount of the electronically controlled component selector is π / 2, recorded as the fourth voltage value, and the voltage value of the fourth light beam when the delay amount of the electronically controlled component selector is 0, recorded as the fifth voltage value.

[0074] It should be noted that the first voltage value is determined by the first photodiode, and the second voltage value includes multiple values, which are determined by the first photodiode and the third photodiode through an operational amplifier.

[0075] Step 202: Divide the first voltage value by 2 to obtain a basic voltage value.

[0076] Step 203: Divide the first voltage value, the third voltage value, the fourth voltage value, and the fifth voltage value by the basic voltage value respectively to obtain a decoded value of the incident light.

[0077] It should be mentioned that the first voltage value, the third voltage value, the fourth voltage value and the fifth voltage value are divided by the basic voltage value to obtain normalized parameter values, and the normalized parameter values are further converted to obtain the decoding value of the incident light.

[0078] Figure 3 An example of a physical structure diagram of an electronic device is shown below. Figure 3 As shown, the electronic device may include: a processor 310, a communication interface 320, a memory 330, and a communication bus 340, wherein the processor 310, the communication interface 320, and the memory 330 communicate with each other via the communication bus 340. The processor 310 may call the logic instructions in the memory 330 to execute the decoding method for all-optical networking and optical gateway, which includes:

[0079] Obtain a first voltage value and a second voltage value; the second voltage value includes the voltage value of the third light beam when the delay amount of the electronically controlled component selector is 0, recorded as the third voltage value, the voltage value of the third light beam when the delay amount of the electronically controlled component selector is π / 2, recorded as the fourth voltage value, and the voltage value of the fourth light beam when the delay amount of the electronically controlled component selector is 0, recorded as the fifth voltage value.

[0080] The first voltage value is divided by 2 to obtain a basic voltage value.

[0081] The first voltage value, the third voltage value, the fourth voltage value, and the fifth voltage value are respectively divided by the basic voltage value to obtain a decoded value of the incident light.

[0082] In addition, the logic instructions in the above-mentioned memory 330 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when sold or used as an independent product. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0083] On the other hand, the present invention further provides a computer program product, comprising a computer program, which may be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can perform a decoding method for all-optical networking and optical gateways, the method comprising:

[0084] Obtain a first voltage value and a second voltage value; the second voltage value includes the voltage value of the third light beam when the delay amount of the electronically controlled component selector is 0, recorded as the third voltage value, the voltage value of the third light beam when the delay amount of the electronically controlled component selector is π / 2, recorded as the fourth voltage value, and the voltage value of the fourth light beam when the delay amount of the electronically controlled component selector is 0, recorded as the fifth voltage value.

[0085] The first voltage value is divided by 2 to obtain a basic voltage value.

[0086] The first voltage value, the third voltage value, the fourth voltage value, and the fifth voltage value are respectively divided by the basic voltage value to obtain a decoded value of the incident light.

[0087] In another aspect, the present invention further provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements a decoding method for all-optical networking and an optical gateway, the method comprising:

[0088] Obtain a first voltage value and a second voltage value; the second voltage value includes the voltage value of the third light beam when the delay amount of the electronically controlled component selector is 0, recorded as the third voltage value, the voltage value of the third light beam when the delay amount of the electronically controlled component selector is π / 2, recorded as the fourth voltage value, and the voltage value of the fourth light beam when the delay amount of the electronically controlled component selector is 0, recorded as the fifth voltage value.

[0089] The first voltage value is divided by 2 to obtain a basic voltage value.

[0090] The first voltage value, the third voltage value, the fourth voltage value, and the fifth voltage value are respectively divided by the basic voltage value to obtain a decoded value of the incident light.

[0091] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, i.e., they may be located in one location or distributed across multiple network units. Some or all of the modules may be selected based on actual needs to achieve the objectives of the present embodiment. Persons of ordinary skill in the art will be able to understand and implement the present invention without inventive effort.

[0092] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a necessary general hardware platform, or of course, by hardware. Based on this understanding, the essence of the above technical solution or the part that contributes to the existing technology can be embodied in the form of a software product. The computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a magnetic disk, an optical disk, etc., and includes a number of instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or certain parts of the embodiments.

[0093] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A decoding system for all-optical networking and optical gateway, characterized in that: include: A first depolarizing beam splitter prism, a second depolarizing beam splitter prism, a pre-decoding device, and a decoding device; A first depolarizing beam splitter prism is used to split the incident light into a first light beam and a second light beam for emission; a second depolarizing beam splitter prism, configured to split the second light beam into a third light beam and a fourth light beam for emission; a predecoding device, configured to predecode the third and fourth light beams to obtain predecoded light beams, the predecoding device comprising a first half-wave plate, a second half-wave plate, and an electrically controlled component selector, wherein the first half-wave plate and the second half-wave plate have different deflection angles, and the electrically controlled component selector has multiple delay amounts; A decoding device is used to decode the incident light according to the first light beam and the pre-decoding light beam.

2. The decoding system for all-optical networking and optical gateway according to claim 1, characterized in that: The first half-wave plate in the pre-decoding device is used to deflect the third light beam, the second half-wave plate is used to deflect the fourth light beam, and the electrically controlled component selector is used to determine the pre-decoding light beam based on the deflected third light beam and the deflected fourth light beam.

3. The decoding system for all-optical networking and optical gateway according to claim 1 or 2, characterized in that: It also includes a polarization beam splitter prism, which is used to evenly split the pre-decoding light beam into a fifth light beam and a sixth light beam for emission, and the emission directions of the fifth light beam and the sixth light beam are perpendicular to each other.

4. The decoding system for all-optical networking and optical gateway according to claim 1 or 2, characterized in that: The light splitting ratio of the first depolarization beam splitter prism and the second depolarization beam splitter prism is 1:

1.

5. The decoding system for all-optical networking and optical gateway according to claim 3, characterized in that: The decoding device includes a voltage value detection module and a calculation module, wherein the voltage value detection module is used to determine a first voltage value according to the first light beam and determine a second voltage value according to the pre-decoding light beam; The calculation module is configured to decode the incident light according to the first voltage value and the second voltage value.

6. The decoding system for all-optical networking and optical gateway according to claim 5, characterized in that: The voltage value detection module includes a homodyne detection module and a first photodiode; the first photodiode is used to determine a first voltage value according to the first light beam, and the homodyne detection module is used to determine a second voltage value according to the pre-decoding light beam.

7. The decoding system for all-optical networking and optical gateway according to claim 6, characterized in that: The homodyne detection module includes a second photodiode, a third photodiode and an operational amplifier, the second photodiode is used to convert the fifth light beam into a first electrical signal, the third photodiode is used to convert the sixth light beam into a second electrical signal, and the operational amplifier is used to determine a second voltage value based on the first electrical signal and the second electrical signal.

8. The decoding system for all-optical networking and optical gateway according to any one of claims 1 to 7, characterized in that: The deflection angle of the first half-wave plate is π / 8, and the deflection angle of the second half-wave plate is 0.

9. The decoding system for all-optical networking and optical gateway according to any one of claims 1 to 7, characterized in that: The delay amount of the electronically controlled component selector is 0 and π / 2.

10. A decoding method for all-optical networking and optical gateway, characterized in that: include: Acquire a first voltage value and a second voltage value; The second voltage value includes a voltage value of the third light beam when the delay amount of the electronically controlled component selector is 0, recorded as a third voltage value, a voltage value of the third light beam when the delay amount of the electronically controlled component selector is π / 2, recorded as a fourth voltage value, and a voltage value of the fourth light beam when the delay amount of the electronically controlled component selector is 0, recorded as a fifth voltage value; Divide the first voltage value by 2 to obtain a base voltage value; The first voltage value, the third voltage value, the fourth voltage value, and the fifth voltage value are respectively divided by the basic voltage value to obtain a decoded value of the incident light.

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