CN101053185A - Transceiver based on loop back initiation - Google Patents

Abstract

An operational optical transceiver configured to initiate operation in loop back mode. The optical transceiver includes transmit and receive signal paths, a memory capable of having microcode written to it, and a configurable switch array that is used to connect and disconnect the two signal paths as appropriate for a desired loop back mode. The microcode is structured to cause the optical transceiver to control the configurable switch array. This allows for analysis and diagnostics of the signal data.

Description

Transceiver based on loop back initiation

Background technology

Calculating and network technology have changed our world.Because pass through the increase of the amount of information of Network Transmission, it is more important that high-speed transfer becomes.Many high speed data transmission networks rely on optical transceiver and similar device, and these devices help to send and receiving digital data by the form of optical fiber with light signal.Therefore, in a lot of high-speed applications, using optical-fiber network, from general small-sized Local Area Network to large-scale the Internet backbone.

Usually, the transfer of data in this network realizes by optical transmitter (being also referred to as electrical to optical converter), for example laser diode or light-emitting diode (LED).Electrical to optical converter is luminous when electric current passes through, and the light intensity that is sent is the function of the magnitude of current.Data Receiving realizes by optical receiver (being also referred to as optical-electrical converter) usually, for example photodiode.Optical-electrical converter receives light and also produces electric current, and the amount of current that is produced is the function of the luminous intensity that received.

Optical transceiver also utilizes multiple other elements to help control light to send and receiving element, and several data and other Signal Processing.For example, this optical transceiver generally includes driver (for example, being called " laser driver " when being used for the driving laser signal), is used to respond the operation of various control input control optical transceiver.Optical transceiver also comprises amplifier (for example, often being called " post amplifier ") usually, is used to carry out the multiple operation of certain parameter of the data-signal that receives about optical receiver.The operation of controller circuitry (hereinafter being called " controller ") control laser driver and post amplifier.

Here main body required for protection is not limited to the embodiment that solves any defective or only move in above-mentioned environment.But this background only supplies in exemplary technical field of explanation, and embodiment more described here can be applied to wherein.

Summary of the invention

The problems referred to above of prior art can be overcome by principle of the present invention, the present invention relates to be configured to start the optical transceiver of loop back mode operation.Optical transceiver comprises RX path, and described RX path comprises optical-electrical converter and post amplifier, and the light signal that described optical-electrical converter is configured to receive is converted to the signal of telecommunication of reception, and described post amplifier is configured to handle the signal of telecommunication of reception.Optical transceiver also comprises transmit path, described transmit path comprises electro-optic transducer driver and electrical to optical converter, described electro-optic transducer driver is configured to produce electricity and sends signal, and it is that light sends signal that described electrical to optical converter is configured to electricity is sent conversion of signals.

Transceiver also comprises configurable switch array, can be optionally node in the described RX path between described optical-electrical converter and described post amplifier and node in the described transmit path between described electro-optic transducer driver and described electrical to optical converter be connected with cutting off to be connected.And optical transceiver also comprises memory, can be written into microcode.Described microcode is by structuring, so that described optical transceiver is controlled described configurable switch array.Advantageously, this makes optical transceiver to start loop back mode operation and does not need extra hardware.

This part is used for proposing in simplified form summary, and will be described in detail hereinafter.This part is not used in key feature or the essential feature of determining the main body that requires, also is not used in the scope that helps to determine the main body that requires.

To propose additional feature and advantage in the following description, a part wherein perhaps comes indoctrination session apparent by the practice in this instruction according to specification.Can realize in the mode of the indication that in described claim, particularly points out and combination and obtain in the feature and advantage of this instruction, perhaps can put into practice and learn by the invention that hereinafter proposes.

Description of drawings

In order further to illustrate above-mentioned and other advantages and feature of the present invention, of the present invention more specifically the description will illustrate by specific embodiment illustrated in the accompanying drawings.Be understandable that these accompanying drawings only describe exemplary embodiments of the present invention, rather than be used to limit its scope.Below describe and explain the present invention by accompanying drawing with additional feature and details.Wherein:

The schematically illustrated example that can realize the optical transceiver of feature of the present invention of Fig. 1;

The example of the control module of the schematically illustrated Fig. 1 of Fig. 2;

The example of the part of the schematically illustrated optical transceiver according to the embodiment of the invention of Fig. 3, this part comprises configurable switch array;

Fig. 4 illustrates the embodiment that operates under first loop back mode;

Fig. 5 illustrates the embodiment that operates under second loop back mode;

Fig. 6 illustrates the embodiment that operates under the 3rd loop back mode;

Fig. 7 illustrates the embodiment that operates under the 4th loop back mode;

Fig. 8 illustrates the embodiment that operates under the 5th loop back mode.

Embodiment

Principle of the present invention relates to a kind of optical transceiver, can be configured to the startup loop back mode operation in operation.Optical transceiver comprises: send and the received signal path; Memory can be written into microcode; And configurable switch array, be used to be suitable for desired loop back mode and connect and cut off two kinds of signal paths.Microcode is by structuring, so that optical transceiver can be controlled configurable switch array.This makes it possible to signal data is performed an analysis and diagnoses.But the example of operational optical transceiver environment will be described at first.Then, but will operations according to the instant invention be described for operating environment.

Fig. 1 illustrates the optical transceiver 100 that uses the principle of the invention.When describing optical transceiver 100 in some details, optical transceiver 100 is only described in the mode of example, and does not describe in the mode of the restriction scope of the invention.Principle of the present invention is applicable to that 1G, 2G, 4G, 8G, 10G are connected with the optical fiber of high bandwidth more.And, principle of the present invention can be without restriction in any form optical transmitter/the receiver of key element (for example XFP, SFP and SFF) realize.As mentioned above, principle of the present invention is not subjected to the restriction of optical transceiver environment fully.

Optical transceiver 100 utilizes receiver 101 from optical fiber 110A receiving optical signals.Receiver 101 serves as optical-electrical converter by light signal is converted to the signal of telecommunication.Receiver 101 offers post amplifier 102 with the signal of telecommunication that obtains.Post amplifier 102 is with the signal amplification and offer the external host of being represented by arrow 102A 111.External host 111 can be any computing system that can communicate with optical transceiver 100.External host 111 can comprise mainframe memory 112 (can be volatibility or non-volatile memory source).In one embodiment, optical transceiver 100 can be printed circuit board (PCB) or other components/chips in the main frame 111, although this not necessarily.

Optical transceiver 100 can also receive the signal of telecommunication from main frame 111 and be used for sending at optical fiber 110B.Particularly, electro-optic transducer driver 103 (being also referred to as laser driver 103) receives the signal of telecommunication of being represented by arrow 103A, and (this signal makes transmitter 104 (for example to utilize signal, laser diode or light-emitting diode (LED)) send light signal to optical fiber 110B, the information in the signal of telecommunication that this light signal representative is provided by main frame 111) drive electrical to optical converter 104 (being also referred to as transmitter 104).Therefore, transmitter 104 is as electrical to optical converter.

Marked change may appear because of several factors in the performance performance of receiver 101, post amplifier 102, laser driver 103 and transmitter 104.For example, variations in temperature, power fluctuation, feedback condition can influence the performance of these elements.Therefore, optical transceiver 100 comprises control module 105, control module 105 can evaluate temperature and voltage conditions and other operating environments, and from post amplifier 102 (105A represents by arrow) and laser driver 103 (105B represents by arrow) reception information.This makes control module 105 can optimize the performance of dynamic change, and can detect when there is the loss of signal.

Particularly, control module 105 can be offset these variations by adjusting post amplifier 102 or being provided with of laser driver 103 (also being represented by arrow 105A and 105B).Adjustment just is set because have only when obtaining to guarantee, so the adjustment that is provided with is very discontinuous when temperature or voltage or other low frequencies change.

Control module 105 can be visited permanent memory 106, and in one embodiment, permanent memory 106 is Electrically Erasable Read Only Memory (EEPROM).Permanent memory 106 and control module 105 can be packaged together, also can separate packages, and this is without limits.Permanent memory 106 can also be any other non-volatile memory source.

Control module 105 comprises simulation part 108 and numerical portion 109.Simulation part 108 and numerical portion 109 make control module in the part of often handling optical transceiver 100 use analog signals, can also realize the logical process of numeral.Fig. 2 illustrates in greater detail the example 200 of control module 105.Control module 200 comprises: simulation part 200A, the example of the simulation part 108 of presentation graphs 1; And numerical portion 200B, the example of the numerical portion 109 of presentation graphs 1.

For example, simulation part 200A can comprise digital to analog converter, analog to digital converter, high-speed comparator (for example, being used for event detection), the reseting generator based on voltage, voltage regulator, reference voltage, clock generator and other analog elements.For example, simulation part 200A comprises transducer 211A, 211B, 211C and other possible element of being represented by horizontal ellipses 211D.In these transducers each can be used for measuring can be from the operational factor of control module 200 measurements, for example supply voltage and transceiver temperature.Control module can also receive external analog or digital signal from other elements in the optical transceiver, other measured parameters of these signal indications, for example laser bias current (laser bias current), transmitted power, received power, optical maser wavelength, laser temperature and thermoelectric cooling module (TEC) electric current.Described two outside line 212A and 212B and be used to receive this external analog signal, although a lot of such circuits are arranged.

Internal sensor can produce the analog signal of the measured value of expression.In addition, the signal that provides of outside also can be an analog signal.In this case, analog signal is converted into the feasible numerical portion 200B that can be used for control module 200 of digital signal and does further processing.Certainly, each analog parameter value can have the analog to digital converter (ADC) of oneself.But,, can use single ADC (ADC 214 that for example, illustrates) with round-robin method (round robin fashion) each signal of periodic sample in order to keep chip space.In this case, each analogue value can be offered multiplexer 213, multiplexer 213 is once selected in the analog signal one by ADC 214 with round-robin method, is used for sampling.Perhaps, multiplexer 213 can be programmed, and makes ADC 214 to come sampled analog signals with any order.

As mentioned above, the simulation part 200A of control module 200 can also comprise other analog elements 215, for example digital to analog converter, other analog to digital converters, high-speed comparator (for example, being used for event detection), reseting generator, voltage regulator, reference voltage, clock generator and other analog elements based on voltage.

The numerical portion 200B of control module 200 can comprise timer module 202, and timer module 202 provides multiple time signal to use for numerical portion 200B.These clock signals can comprise for example programmable processor clock signal.Timer module 202 can also be served as Watch Dog Timer.

Also comprise two multipurpose processor 203A and 203B.The indication that processor identification is provided with according to specific indication, and can carry out normal multipurpose operational example such as displacement, branch, add, subtract, multiplication and division, Boolean calculation, comparison operation etc.In one embodiment, multipurpose processor 203A and 203B are 16 bit processors, and can be same structures.The precision architecture of instruction set is inessential for principle of the present invention, because can optimize instruction set in specific hardware environment, and accurate hardware environment is inessential for principle of the present invention.

Host communication interface 204 is used for communicating by letter with main frame 111, can utilize two-wire interface, I for example shown in Figure 1 ²C realizes as (SDA) line of the serial data on the optical transceiver 100 and serial clock (SCL) line.Also can realize other host communication interface.Use this host communication interface, data can be offered main frame 111 from control module 105, to allow numerical diagnostic and to read temperature level, transmission/received power size etc.External apparatus interface 205 for example is used for other modules with optical transceiver 100, and for example post amplifier 102, Laser Driven 103 or permanent memory 106 are communicated by letter.

Internal controller system storage 206 (not obscuring with external persistent memory 106) can be random access storage device (RAM) or nonvolatile memory.Memory Controller 207 in each processor 203A and 203B with host communication interface 204 and external apparatus interface 205 share and access controller system memories 206.In one embodiment, HCI 204 comprises serial interface controller 201A, and external apparatus interface 205 comprises serial interface controller 201B.Dual serial interface controller 201A and 201B can utilize two-wire interface, for example I ²C or other interfaces communicate, as long as interface can be by two communication module identifications.A serial interface controller (for example, serial interface controller 201B) is a major component, and other serial interface controllers (for example, serial interface controller 201A) are from element.

I/O multiplexer 208 is multiplexed to a plurality of elements in the control module 200 with a plurality of I/O pins of control module 200.This makes different elements dynamically to distribute pin according to control module 200 operating environment at that time.Therefore, the I/O node in the control module 200 is more than the available pin on the control module 200, thereby reduces the shared area of control module 200.

Registers group 209 comprises a plurality of independent registers.These registers can be used by processor 203, and the microcode that is used for that control is compared at a high speed generates data and writes optical transceiver 100.Perhaps, register can be preserved the data that selection is used for the operational factor of comparison.In addition, register can memory-mapped to a plurality of elements of optical transceiver 100, with the parameter of control element for example laser bias current or transmitted power.

Described specific environment, it should be understood that this specific environment is in the adaptable many structures of principle of the present invention about Fig. 1 and Fig. 2.As mentioned above, principle of the present invention is not limited to any specific environment.Therefore, principle of the present invention relates to the optical transceiver that can be used to start loop back mode operation.

In many examples, preferably under loop back mode, move optical transceiver.In specification and claims, when from the signal of transmit path or RX path by loopback and when flowing into another path, loop back mode appears.This makes it possible to signal is done diagnosis and analysis, thus the function of element in test transmission and the RX path.But optical transceiver is not to start loop back mode operation voluntarily.Instead, start by the optical transceiver host computing system and control any loop back mode operation.Main frame needs additional hardware usually, and for example field effect programmable gate array (FPGA) is used for loop back mode operation.Cost is bigger like this.In addition, the use of other hardware (for example FPGA) has been slowed down the response time of optical transceiver usually.Principle of the present invention allows the configuration optical transceiver to start loop back mode.

Fig. 3 illustrates the more detailed view of optical transceiver 300 parts that are used to implement the principle of the invention.300 parts comprise: receiver 301 in the RX path (also being called optical-electrical converter) and post amplifier 302, and laser driver in the transmit path 303 (also being called electro-optic transducer driver) and transmitter 304 (also being called electrical to optical converter).For example, if 300 parts are used for the specific light transceiver 100 of Fig. 1, element 301-304 can be identical with the element 101-104 among Fig. 1 among Fig. 3 so, although this not necessarily.To operation of the present invention be described with reference to figure 1,2 and 3.

Fig. 3 illustrate be distributed among transmit path and the RX path and between configurable switch array.It should be appreciated by those skilled in the art that specifically described configurable switch just can be used to realize one of the example of the many possible configurable switch array of the principle of the invention.In specification and claims, configurable switch array can be any switch arrays by microcode configuration, no matter be known or leaved for development.In specification and claims, " microcode " is defined as the command code or the control code of any kind, the firmware and the software of the operation of control transceiver during for example in operation on the microprocessor and in execution, but be not limited thereto.For example, the independent switch of each in configurable switch array can be the same with single transistor simple.But a plurality of switches can be complicated more, may comprise many circuit elements.The descriptive configurable switch array of Fig. 3 conceptually is described as comprising switch 305-308.

In many examples, will describe in detail more as following, in loop back operation, connect and send and during RX path when opening and closing switch 305-308, unwanted electric capacity reciprocation can be introduced into the signal that sends and receive.Capacity effect can twist or weaken and send and received signal.In order to reduce capacity effect, switch 305-308 can be embodied as low capacitive switch array.Low capacitive switch array is a known technology, does not therefore need more detailed description.

With reference to figure 2, as mentioned above, transceiver control module 200 comprises processor 203 and row's (bank) registers group 209 again.In certain embodiments, one or more registers 209 can memory-mapped to the combinational logic of control switch 305-308.Processor 203 can write microcode the operation of these registers with control switch.For example, the register in the registers group 209 can be the byte register, comprises a position of the numerical data that the respective switch in the control configurable switch array is opened or closed.For example, if the switch in configurable switch array receives binary digit 1, switch can cut out so.On the contrary, if switch receives binary digit 0, switch can be opened so.

In other embodiments, control module 200 can have dedicated memory location, can be specifically designed to the reception high-level command.This dedicated memory location can be used for receiving only the high-level command of control configurable switch array, starts thus or ends certain loop back mode.Perhaps, this memory location can receive a plurality of high-level commands in time, comprises the high-level command that is used to control loop back mode.The memory location can be the register in the registers group 209 or can be the part of controller system memory 206.The user can write order dedicated memory location and indicate transceiver 100 to enter loop back mode.Perhaps, main frame 111 can write the memory location with order.Then, processor 203 is chosen the processor position for order, perhaps reads in the interruption that is activated when new data is written into the memory location.If find the winding control command, the suitable switch (or a plurality of switch) of processor 203 indications cuts out or opens to start loop back mode operation so.

Processor 203 can be controlled to be configurable switch array the customized configuration of response user input.For example, user or main frame 111 can be specified the electrical loop back that needs, and therefore processor 203 can control configurable switch array.But whether the execution that processor 203 can respond microcode is estimated voluntarily is the loop back mode that needs, and enter which kind of loop back mode.For example, if detected received power is low, do not need external command so, processor 203 can enter loop back mode.

For example, suppose that 300 parts of optical transceiver are with normal operations rather than with loop back mode transmission and received signal.Switch 305 and 306 will be opened and switch 307 and 308 will cut out, therefore keep sending and RX path complete, and transmission and RX path are isolated from each other.

When detecting fault, in the time of perhaps will the test light transceiver, there be the multiple different loop back mode that are applicable to diagnosis problem or testing element.In Fig. 4-8, describe and show these loop back mode.

In a possible loop back mode, when transceiver 100 stops to send, send the signal of telecommunication and flow into RX path at electrical interface.Fig. 4 has illustrated this loop back mode.In this case,, binary digit 1 is offered switch 305, switch 305 cuts out with reference to figure 3.This makes to produce between transmit path and the received signal path and is connected. Switch 307 and 308 can receive binary digit 0, and they are opened.By this way, the transmission signal of telecommunication from laser driver 303 can flow back to post amplifier 302.Then, control module 105 can be analyzed the transmission signal of telecommunication.Under this pattern,, just can infer that post amplifier 302 and laser driver 303 are working properly very soon if the signal that is received is identical with the transmission signal.This information can be sent to main frame 111 and be used for analyzing.

In other possible loop back mode, when transceiver 100 continues the light transmission, send the signal of telecommunication and flow into RX path at electrical interface.Fig. 5 has illustrated this loop back mode.In this case,, binary digit 1 is offered switch 305, make it close and produce two connections between the signal path with reference to figure 3.Also binary digit 1 is offered switch 307 and make it close (perhaps keeping closing), keep transmit path complete thus.Switch 308 receives binary digit 0, and it is opened.By this way, light receiving signal can not help the electrical receive signal measured behind post amplifier.Similarly, under this pattern,, can infer that so very soon post amplifier 302 and laser driver 303 operations are normal if the signal that is received is identical with the transmission signal.But if there is not the problem of complete connection to the transmit path of other optical transceivers, transmit path can be kept perfectly so, therefore, even between the loopback diagnostic period, remain productive.Similarly, the result can be sent to main frame 111 and is used for analyzing.

In some instances, also be necessary to start loop back mode for optical transceiver 100 and be used to send optical signal interface with RX path.In this case, it is incorrect that the remote optical transceiver device that communicates to connect by optical fiber 110 and optical transceiver 100 can sense the light signal that remote transceiver sends.Remote transceiver can communicate and require it to start the light loop back mode operation with transceiver 100.Because in above-mentioned electric loop back mode, control module 105 can start the light loop back mode.Processor 203 can write data the register in the registers group 209, and this registers group is a memory-mapped, to control above-mentioned switch.Perhaps, order can be write dedicated memory location.

In the 3rd loop back mode of in Fig. 6, describing, will send to receiver 301 from the light signal of remote transceiver.Then, light signal flows into transmit path and sends back to remote receiver by transmitter 304 from RX path at optical interface.In this case,, binary digit 1 is sent to switch 306, make it close and connect and receive and send light path, allow light signal to flow into transmitters 304 from receiver 301 with reference to figure 3.Binary digit 0 is sent to switch 307 and 308, they are opened.This stops light signal to flow into post amplifier 302 and laser driver 303.This pattern allows remote transceiver more to send to the signal of transceiver 300 parts and the signal that transceiver 300 parts send it back.According to this information, whether remote transceiver can diagnose optical fiber to allow by light signal to be sent and that receive, and/or transmitter and receiver are worked.

In the 4th possible loop back mode, receiver 100 can receiving optical signals, makes that simultaneously light signal flows into transmit path at optical interface, and makes this signal be sent out back remote transceiver.This is shown in Figure 7.In this case,, binary digit 1 is sent to switch 306, it is closed and connect RX path and transmit path, allow light signal to flow into transmitter 304 to send it back remote transceiver with reference to figure 3.Switch 308 also receives binary digit 1 and cuts out, and allows light signal to flow to post amplifier 302 from receiver 301.Switch 305 and 307 all receives binary digit 0 and opens, and prevents that laser driver 303 from influencing main frame 111 signal that receives and the light signal that turns back to remote transceiver respectively.This pattern allows remote transceiver more to send to the signal of transceiver 100 and the signal that transceiver 100 sends it back, but also allows transceiver 100 analytic signals.

In the 5th possible loop back mode, preferably carry out electricity and light winding simultaneously.The signal of telecommunication from transceiver 100 is flowed back to RX path.Light signal from remote transceiver is flowed back to transmit path.This is shown in Figure 8.In this case,, binary digit 1 is sent to switch 305 and 306, it is closed with reference to figure 3.Binary digit 0 is sent to switch 307 and 308, it is opened.Off switch 305 allows to get back to post amplifier 302 from the transmission electric signal streams of laser driver 303.Then, control module 105 can be analyzed the transmission signal of telecommunication.Off switch 306 allows to flow to transmitter 304 from the light signal of remote transceiver from receiver 301, and is sent back to remote transceiver.Remote transceiver then can analytic signal.

Control module 105 can also start the termination of loop back mode operation.Control module 105 can be determined no longer need move with loop back mode.Processor 203 can write suitable logic in the register in the registers group 209 or can read the order that is written to dedicated memory location.According to the difference of implementing above-mentioned loop back mode, register can correspondingly provide binary digit 1 to switch 307 and 308 and make it cut out or keep cutting out.Binary digit 0 can offer switch 305 and 306, and it is opened.Perhaps, the order in dedicated memory location can make processor 203 off switch 307 and 308 and open switch 305 and 306.This can disconnect transmission and RX path and can allow transceiver 100 to receive and send signal normally.

In another embodiment, can configure host 111 make transceiver 100 start loop back mode.Main frame 111 can be from the information of transceiver 100 receptions about the operating parameter as transmitted power and received power.When these parameters reached certain value, main frame 111 can send a command to control module 105 by SCL and sda line road and indicate control module 105 to start loop back mode automatically.For example, if main frame has received the low excessively information of transmitted power, main frame can indicate control module to start loop back mode 2 in the above described manner so.This can help to determine whether to cause the problem of low transmitted power to be that electricity sends the transmission optical fiber 110B of signal, damage, perhaps other reasons.In a similar manner, main frame 111 can be indicated control module 105 to start with aforementioned manner and be carried out other loop back mode.

Main frame 111 can also serve as the reinforcement of transceiver initiation of loop back pattern.As mentioned above, transceiver 100 can be configured to start loop back mode with above-mentioned mode self.But no matter reason how, if transceiver 100 can't correctly start loop back mode voluntarily, main frame 111 can be got involved and force transceiver 100 beginning loop back mode operation so.This is very favorable safety measure.

In other embodiments, can be that the user makes transceiver 100 move with loop back mode.For example, suppose that the user wants to analyze the signal of telecommunication that sends and examines its level size correctly.The user can indicate main frame 111 to make control module 105 start loop back mode 1 by opening and closing switch 305-308 in the mode of having discussed by using subsidiary keyboard or mouse.This makes the user to carry out the difference diagnosis on transceiver 100 by using different loop back mode.

In another embodiment, I/O pin that can be by triggering (toggling) or switching controls module 105 or lead or one group of I/O pin or lead start loop back mode operation.For example, when the pin of an appointment was in low-voltage and is configured to produce certain loop back operation, first pin can be configured to when the high voltage position, produced different loop back operation (aforementioned loop back mode one of them).When this pin is in neutral position, may just not implement loop back mode operation.By configurable one or more pin of microcode, so that under given loop back mode, operate.For example, user only may be required in the operation in the loop back mode 1, and another user may be required in the operation in the loop back mode 4, and one or more pin can be configured to produce this result.

In other embodiments, configurable switch array can be included in laser driver 303 chips or the post amplifier chip.When the given I/O pin of the chip that is connected to particular switch during from the low voltage transition to the high voltage or from low voltage transition to high voltage, switch 305-308 can be configured to open and close.By this way, the operation under the multiple loop back mode of having discussed can be realized by optical transceiver.

Principle of the present invention is to provide a kind of optical transceiver that existing optical transceiver has multiple advantage of comparing.Particularly, the present invention allows transceiver based on loop back initiation.Transceiver configuration is for by connecting and cutting off required transmission and RX path starts loop back mode operation.This allows the analysis of transmission and received signal routing problem and determines.In addition, main frame can be configured to indication transceiver initiation of loop back pattern.If transceiver fails to start voluntarily loop back mode, then provide important reinforcement.At last, the user can indicate the transceiver initiation of loop back pattern.This analyzes needed signal path in the transceiver for the user provides a kind of effective means rice.Therefore, principle of the present invention has been represented the important advance in the art of optical transceivers.

The present invention can realize with other ad hoc fashions that do not break away from its spirit or substantive characteristics.Described embodiment should think schematic rather than restrictive in every respect.Therefore, scope of invention limits by claims rather than by above stated specification.The various variations of being made in the implication of the equivalent representation of claim and scope are included in the scope of the invention.

Claims (21)

1, a kind of optical transceiver comprises:

RX path comprises: optical-electrical converter, and the light signal that is configured to receive is converted to the signal of telecommunication of reception; And post amplifier, be configured to handle the signal of telecommunication of reception;

Transmit path comprises: electro-optic transducer driver is configured to produce electricity and sends signal; And electrical to optical converter, being configured to described electricity is sent conversion of signals is that light sends signal;

Configurable switch array can be optionally be connected node in the described RX path between described optical-electrical converter and described post amplifier and node in the described transmit path between described electro-optic transducer driver and described electrical to optical converter with disconnecting and be connected;

Memory can be written into microcode, and wherein, described microcode is by structuring, so that described optical transceiver starts loop back mode operation by the action of carrying out the described configurable switch array of control.

2, optical transceiver according to claim 1, wherein, described configurable switch array comprises:

First switch is used for described electro-optic transducer driver is connected to described post amplifier;

Second switch is used for described optical-electrical converter is connected to described electrical to optical converter;

The 3rd switch is used for described electro-optic transducer driver is connected to described electrical to optical converter; And

The 4th switch is used for described post amplifier is connected to described optical-electrical converter.

3, optical transceiver according to claim 1, the action of the described configurable switch array of wherein said control comprises following action:

Described configurable switch array connects node in the described RX path and the node in the described transmit path, makes described electro-optic transducer driver that signal is offered described post amplifier, and stops to provide signal to described electrical to optical converter.

4, optical transceiver according to claim 1, wherein, the action of the described configurable switch array of described control comprises following action:

Described configurable switch array connects node in the described RX path and the node in the described transmit path, makes described electro-optic transducer driver that signal is offered described post amplifier, and continues signal is offered described electrical to optical converter.

5, optical transceiver according to claim 1, wherein, the action of the described configurable switch array of described control comprises following action:

Described configurable switch array connects node in the described RX path and the node in the described transmit path, makes described optical-electrical converter that signal is offered described electrical to optical converter, and stops to provide signal to described post amplifier.

6, optical transceiver according to claim 1, wherein, the action of the described configurable switch array of described control comprises following action:

Described configurable switch array connects node in the described RX path and the node in the described transmit path, makes described optical-electrical converter that signal is offered described electrical to optical converter, and continues signal is offered described post amplifier.

7, optical transceiver according to claim 1, node between wherein said RX path and the transmit path is a first node, and described configurable switch array can also be optionally be connected Section Point in the described RX path between described optical-electrical converter and described post amplifier and Section Point in the described transmit path between described electro-optic transducer driver and described electrical to optical converter with disconnecting and be connected, and the action of the described configurable switch array of described control comprises following action:

Described configurable switch array connects first node in the described RX path and the first node in the described transmit path, makes described electro-optic transducer driver that signal is offered described post amplifier, and stops to provide signal to described electrical to optical converter; And

Described configurable switch array connects Section Point in the described RX path and the Section Point in the described transmit path, makes described optical-electrical converter that signal is offered described electrical to optical converter, and stops to provide signal to described post amplifier.

8, optical transceiver according to claim 1, wherein, described memory is one or more registers that memory-mapped arrives described configurable switch array.

9, optical transceiver according to claim 1, wherein, described memory is the dedicated memory location that is used to receive the high-level command of controlling described configurable switch array.

10, optical transceiver according to claim 1, wherein, described optical transceiver responds the detecting operation error and starts loop back mode operation.

11, optical transceiver according to claim 1, wherein, described optical transceiver responds user's diagnosis request and starts loop back mode operation.

12, optical transceiver according to claim 1, wherein, described optical transceiver responds the request of host computing system and starts loop back mode operation.

13, optical transceiver according to claim 1 also comprises:

When described optical transceiver moved with loop back mode, described optical transceiver responded the action that no longer needs the decision of loop back mode operation and start the termination of loop back mode operation.

14, optical transceiver according to claim 1, wherein, described configurable switch array is low capacitive switch array.

15, optical transceiver according to claim 1, wherein, described optical transceiver responds the I/O pin that is triggered and starts loop back mode operation.

16, a kind of method that is used for optical transceiver startup loop back mode operation, in described optical transceiver, comprise: RX path, described RX path comprises optical-electrical converter and post amplifier, the light signal that described optical-electrical converter is configured to receive is converted to the signal of telecommunication of reception, and described post amplifier is configured to handle the signal of telecommunication of reception; Transmit path comprises electro-optic transducer driver and electrical to optical converter, and described electro-optic transducer driver is configured to produce electricity and sends signal, and it is that light sends signal that described electrical to optical converter is configured to described electricity is sent conversion of signals; Configurable switch array can be optionally be connected node in the RX path between described optical-electrical converter and described post amplifier and node in the transmit path between described electro-optic transducer driver and described electrical to optical converter with disconnecting and be connected; And memory, can be written into microcode, described microcode is by structuring, so that described optical transceiver is controlled described configurable switch array, described method comprises the steps:

Control described configurable switch array.

17, method according to claim 16, wherein, the step of the described configurable switch array of described control comprises the steps:

Described configurable switch array connects node in the described RX path and the node in the described transmit path, makes described electro-optic transducer driver that signal is offered described post amplifier, and stops to provide signal to described electrical to optical converter.

18, method according to claim 16, wherein, the step of the described configurable switch array of described control comprises the steps:

Described configurable switch array connects node in the described RX path and the node in the described transmit path, makes described electro-optic transducer driver that signal is offered described post amplifier, and continues signal is offered described electrical to optical converter.

19, method according to claim 16, wherein, the step of the described configurable switch array of described control comprises the steps:

Described configurable described switch arrays connect node in the described RX path and the node in the described transmit path, make described optical-electrical converter that signal is offered described electrical to optical converter, and stop to provide signal to described post amplifier.

20, method according to claim 16, wherein, the step of the described configurable switch array of described control comprises the steps:

Described configurable switch array connects node in the described RX path and the node in the described transmit path, makes described optical-electrical converter that signal is offered described electrical to optical converter, and continues signal is offered described post amplifier.

21, method according to claim 16, wherein, node between described RX path and the transmit path is a first node, and described configurable switch array can also be optionally be connected Section Point in the described RX path between described optical-electrical converter and described post amplifier and Section Point in the described transmit path between described electro-optic transducer driver and described electrical to optical converter with disconnecting and be connected, and the step of the described configurable switch array of described control comprises the steps:

Described configurable switch array connects first node in the described RX path and the first node in the described transmit path, makes described electro-optic transducer driver that signal is offered described post amplifier, and stops to provide signal to described electrical to optical converter; And

Described configurable switch array connects Section Point in the described RX path and the Section Point in the described transmit path, makes described optical-electrical converter that signal is offered described electrical to optical converter, and stops to provide signal to described post amplifier.

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