CN116318401A - A kind of optical signal splitting method - Google Patents

Abstract

The invention discloses an optical signal branching method, and relates to the technical field of optical communication. Comprising the following steps: receiving at least one path of high-speed optical signals, performing photoelectric conversion, and converting the high-speed optical signals into at least one path of high-speed electrical signals with the same data rate; judging the level standard of the high-speed electric signals, converting at least one path of high-speed electric signals into level standard matched with the receiving end of the electric signal splitter, and connecting the level standard to the receiving end of the electric signal splitter; the electric signal splitter splits the received high-speed electric signal into at least one path of high-speed electric signal with the same data rate as before splitting; judging the level standard of the electric signal after branching, converting the level standard into a level standard matched with the receiving end of the electro-optic converter, and connecting the level standard to the receiving end of the electro-optic converter; converted into an optical signal output by an electro-optic transducer. The invention has the advantages of simple manufacture, small transmission loss and good consistency under the condition of ensuring the unchanged data rate of signals before and after branching, and simultaneously saves labor cost, reduces power consumption and reduces transmission delay.

Description

A kind of optical signal splitting method

technical field

The invention relates to the technical field of optical communication, in particular to an optical signal branching method.

Background technique

In the field of optical communication technology, optical signal splitting transmission technology is mainly used for high-speed data transmission. In the process of optical signal transmission, it is often necessary to send an optical signal to different receiving ends, so it is necessary to split the optical signal. The current optical signal branch transmission technology is mainly divided into passive branch transmission and active branch transmission.

Passive splitting of optical signals is not suitable for application scenarios with a large number of splits due to the complex manufacturing process and poor consistency after optical splitting. There are three solutions for the existing optical signal passive branching, which are physical optical branching, high-speed switching branching and programmable logic device relay branching. Among them, the physical optical branching adopts passive optical branching device and active optical amplification method to realize optical power compensation, which has the disadvantages of high bit error rate and poor scalability. The high-speed switch branch uses high-speed micro-mechanical switches to realize data forwarding between different optical paths through time-division multiplexing. The disadvantages of this method are large size, high power consumption, and high bit error rate. The transfer branch of programmable logic device makes up for the shortcomings of physical optical branch and high-speed switch branch, but the shortcomings of this method are also obvious. Due to the introduction of programmable logic devices, it is necessary to be equipped with hardware logic language programmers, which increases labor costs; The price of the programmable logic device is relatively high, and its power consumption and heat generation are relatively large, so it needs to be equipped with an additional cooling device, which increases the design cost; at the same time, due to the low internal processing rate of the programmable logic device, the optical signal branch needs to go through the serial Parallel conversion, parallel branching, parallel-serial conversion and other links, the transmission delay is relatively large. Therefore, the method of relaying and splitting the programmable logic device is not suitable for applications that have requirements on cost, manpower, and transmission delay.

Contents of the invention

The object of the present invention is to overcome the defects in the above prior art and propose a method for splitting optical signals.

In order to achieve the above object, the technical scheme adopted in the present invention is:

A method for splitting an optical signal, comprising the steps of:

(1) The photoelectric converter receives at least one high-speed optical signal, performs photoelectric conversion on the received optical signal, and converts it into a high-speed electrical signal with the same data rate;

(2) Determine the level standard of at least one high-speed electrical signal, if the level standard matches the receiving end of the electrical signal splitter, connect at least one high-speed electrical signal to the receiving end of the electrical signal splitter; if not, Then at least one high-speed electrical signal is converted into a level standard matching the receiving end of the electrical signal splitter through level conversion, and then connected to the receiving end of the electrical signal splitter;

(3) The electrical signal splitter splits at least one high-speed electrical signal received into at least one high-speed electrical signal with the same data rate as before splitting;

(4) Determine the level standard of at least one high-speed electrical signal after the branch of the electrical signal splitter. If the level standard matches the receiving end of the electro-optic converter, connect at least one high-speed electrical signal after the branch to the electro-optic The receiving end of the converter; if it does not match, at least one high-speed electrical signal after the split is converted into a level standard that matches the receiving end of the electro-optical converter through level conversion, and then connected to the receiving end of the electro-optical converter;

(5) The electro-optic converter receives at least one high-speed electrical signal after the branching, and converts it into an optical signal for output.

Further, in the step (1), the photoelectric converter includes a single-mode photoelectric converter and a multi-mode photoelectric converter, and the number of conversion channels is at least one.

Further, in the steps (2) and (4), the level standard of the high-speed electrical signal includes differential AC coupling, ECL, LVPECL, LVDS, CML, differential HSTL and differential SSTL.

Further, in the steps (2) and (4), the way of level conversion includes performing level conversion through a dedicated level conversion chip and performing level conversion through a resistance-capacitance-sensing separation device.

Further, in the step (3), the electrical signal splitter includes a high-speed clock buffer, a high-speed clock splitter, a high-speed data buffer, a high-speed data splitter and a multiplexer.

Further, in the step (5), the electro-optical converter includes a single-mode photoelectric converter and a multi-mode photoelectric converter, and the number of conversion channels is at least one.

Compared with the prior art, the present invention has the following advantages:

1. The present invention makes up for the shortcomings of physical optical branching, high-speed switching branching manufacturing difficulties, large transmission loss, and poor consistency, and solves the need for additional programmers, high power consumption, and high transmission delay in the relay branching of programmable logic devices The disadvantage is that by using a dedicated electrical signal splitter to directly split the signal, the labor cost, power consumption, and transmission delay are reduced while ensuring that the signal data rate remains unchanged before and after the split.

2. The invention has advanced technology and is easy to implement in engineering, and can split at least one optical signal into at least one optical signal with the same data rate as before splitting.

Description of drawings

Fig. 1 is a flowchart of an optical signal branching method in an embodiment of the present invention.

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings.

An optical signal splitting method is used for splitting at least one optical signal. The data transmission rate and optical power of the optical signal after splitting are the same as those of the optical signal before splitting. The method is simple to manufacture, has small transmission loss and good consistency, and simultaneously saves manpower cost, reduces power consumption, and reduces transmission delay. The method includes the following steps:

(1) Connect at least one high-speed optical signal to the input port S1-1 of the photoelectric conversion S1, and output at least one electrical signal with the same data rate at the port S1-2 after the photoelectric conversion;

(2) Determine whether the level standard of the output port S1-2 of the photoelectric conversion S1 matches the level of the input port Fin of the electrical signal splitter F, if it matches, directly connect the port S1-2 to the port Fin; if not Matching, then connect S1-2 to the input terminal C1-1 of the primary level shifter C1, output to C1-2 after level conversion, and then connect C1-2 to the input port Fin of the electrical signal splitter F;

(3) The electrical signal splitter F splits the electrical signal received from Fin into a high-speed electrical signal with the same data rate as before splitting;

(4) Determine whether the output port F-1～F-n level standard of the electrical signal splitter F matches the level of the input port E1-1～En-1 of the electro-optic converter E1～En, if it matches, directly set the F -1～F-n are connected with the corresponding ports of E1-1～En-1; if they do not match, connect the ports F-1～F-n with the input ports L1-1～Ln-1 of the secondary level conversion L1～Ln, through Output to L1-2~Ln-2 after level conversion, and then connect L1-2~Ln-2 to input ports E1-1~En-1 of electro-optical conversion E1~En;

(5) The electro-optical converters E1~En convert the electrical signals received from E1-1~En-1 into optical signals of the same data rate and then send them through E1-2~En-2 to realize the branching of high-speed optical signals.

The present invention uses a special electrical signal splitter to directly split the signal, and under the condition of ensuring that the signal data rate remains unchanged before and after the split, it has the advantages of simple manufacture, small transmission loss, and good consistency, and at the same time saves Labor costs, reduced power consumption, and reduced transmission delays.

It should be understood that the above-mentioned descriptions of the specific implementation methods of this patent are only exemplary descriptions listed for the convenience of those of ordinary skill in the art to understand the patent solution, and do not imply that the protection scope of this patent is only limited to these examples. On the premise of fully understanding the technical solution of this patent, those skilled in the art can, in the form of not paying any creative work, combine technical features, replace some technical features, and add more technical features to each example listed in this patent. Technical features and other ways to get more specific implementations, all of these specific implementations are within the scope of the patent claims, therefore, these new specific implementations should also be within the protection scope of this patent .

Claims (6)

1. An optical signal branching method is characterized by comprising the following steps:

(1) The photoelectric converter receives at least one path of high-speed optical signals, performs photoelectric conversion on the received optical signals, and converts the received optical signals into high-speed electrical signals with the same data rate;

(2) Judging the level standard of at least one path of high-speed electric signals, and if the level standard is matched with the receiving end of the electric signal splitter, connecting the at least one path of high-speed electric signals to the receiving end of the electric signal splitter; if the signal is not matched with the signal splitter, converting at least one path of high-speed electric signal into a level standard matched with the receiving end of the electric signal splitter through level conversion, and then connecting the electric signal splitter to the receiving end of the electric signal splitter;

(3) The electric signal splitter splits at least one path of received high-speed electric signal into at least one path of high-speed electric signal with the same data rate as before splitting;

(4) Judging the level standard of at least one path of high-speed electric signals after branching by the electric signal branching device, and if the level standard is matched with the receiving end of the electric-optical converter, connecting the at least one path of high-speed electric signals after branching to the receiving end of the electric-optical converter; if the signals are not matched, converting at least one path of high-speed electric signals after branching into level standards matched with the receiving end of the electro-optic converter through level conversion, and then connecting the level standards to the receiving end of the electro-optic converter;

(5) The electro-optic converter receives at least one path of high-speed electric signals after branching and converts the electric signals into optical signals to be output.

2. The optical signal splitting method according to claim 1, wherein in the step (1), the optical-to-electrical converter includes a single-mode optical-to-electrical converter and a multi-mode optical-to-electrical converter, and the conversion path number is at least one.

3. The optical signal splitting method according to claim 1, wherein the level criteria of the high-speed electric signal in the steps (2) and (4) include differential ac coupling, ECL, LVPECL, LVDS, CML, differential HSTL and differential SSTL.

4. The optical signal branching method according to claim 1, wherein in the steps (2) and (4), the level shifting means includes level shifting by a dedicated level shifting chip and level shifting by a resistive-capacitive separation device.

5. The method of claim 1, wherein in the step (3), the electrical signal splitter comprises a high-speed clock buffer, a high-speed clock splitter, a high-speed data buffer, a high-speed data splitter, and a multiplexer.

6. The optical signal splitting method according to claim 1, wherein in the step (5), the electro-optical converter includes a single-mode optical-to-electrical converter and a multi-mode optical-to-electrical converter, and the conversion path number is at least one.

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