CN202679375U - Optical module - Google Patents
Optical module Download PDFInfo
- Publication number
- CN202679375U CN202679375U CN 201220349837 CN201220349837U CN202679375U CN 202679375 U CN202679375 U CN 202679375U CN 201220349837 CN201220349837 CN 201220349837 CN 201220349837 U CN201220349837 U CN 201220349837U CN 202679375 U CN202679375 U CN 202679375U
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- data recovery
- optical module
- integrated chip
- terminal clock
- recovery unit
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Abstract
The utility model discloses an optical module which adopts an SFP+ (small from-factor pluggable plus) packaging structure. The optical module comprises a laser driving unit, a limiting amplifier, a control unit and an electrical interface. The optical module further comprises a transmitting end clock data recovery unit and a receiving end clock data recovery unit, wherein the transmitting end clock data recovery unit is arranged on the front end of the laser driving unit and connected with the laser driving unit, and the receiving end clock data recovery unit is arranged on the rear end of the limiting amplifier and connected with the limiting amplifier. The optical module disclosed by the utility model can carry out reshaping and recovery processing on distorted signals once again through adding the clock data recovery units inside the optical module, and can recover the distorted signals to stable signals once again, thereby enabling the distorted signals to be compensated and recovered, and ensuring optic-electro conversion and electro-optic conversion of signals and long-distance optical fiber transmission of optical signals.
Description
Technical field
The utility model belongs to the optical communication technique field, specifically, relates to a kind of optical module.
Background technology
Optical module is a kind of integration module that converts light signal to the signal of telecommunication and/or convert the electrical signal to light signal, plays an important role in the optical-fibre communications process.Along with the development of optical fiber communication, optical transmission system is had higher requirement to optical module, and optical module is gradually to small size, low-power consumption, large capacity, future development cheaply.Employing SFP+(Small From-Factor Pluggable Plus enhancement mode SFP optical module) the SFP+ optical module of encapsulating structure is compared optical module more early, that adopt the XFP encapsulation, its overall dimension is much smaller, becomes the preferred module of optical module miniaturization development.
For the needs that optical module reduced cost, the optical module inside of existing SFP+ packing forms does not all have the clock and data recovery function.Will there be following problem like this:
1. the signal of telecommunication of system end is through the transmission of integrated circuit board, after being transferred to the emission driving chip of optical module, signal produces loss and distortion, and impact drives chip to the modulation of laser, final so that distortion appears in the conversion of electric light, and then affect light signal in the transmission of optical-fibre channel.
2. when the optical module receiving terminal receives the light signal of long fine transmission, because long fine dispersion and loss, the broadening of signal and distortion are more serious, after optical fiber receive module and limiting amplifier change the signal of telecommunication into, cause the shake of signal to become large, signal of telecommunication distortion even error code occurs.
Summary of the invention
The utility model provides a kind of optical module in order to address the above problem, by increasing the clock and data recovery unit in optical module inside, can re-start the signal of distortion the shaping Recovery processing and can again recover stable signal, so that the signal of distortion is compensated and recovers, guarantee the opto-electronic conversion of signal and the long-distance optical fiber transmission of electric light conversion and light signal.
For solving the foregoing invention problem, the present invention adopts following technical proposals to be achieved:
A kind of optical module, this optical module adopts the SFP+ encapsulating structure, comprise laser drive unit, limiting amplifier, control unit and electrical interface, also include the transmitting terminal clock and data recovery unit that is arranged on described laser drive unit front end, is connected with laser drive unit and the receiving terminal clock and data recovery unit that is arranged on described limiting amplifier rear end, is connected with limiting amplifier; Input to described transmitting terminal clock data unit from the signal of telecommunication to be launched of described electrical interface and carry out signal shaping, electric signal transmission after the shaping is to described laser drive unit, reception electric signal transmission to the described receiving terminal clock and data recovery unit of described limiting amplifier output carries out signal shaping, and the signal of telecommunication after the shaping is exported from described electrical interface as receiving the signal of telecommunication.
For transmitting terminal clock and data recovery unit, specifically can adopt following implementation structure: described transmitting terminal clock and data recovery unit comprises an integrated chip, the differential signal input of described integrated chip is connected with the corresponding pin of described electrical interface by the input coupling capacitance, its output is connected with the corresponding circuits of described laser drive unit by output coupling capacitor, and the control end of described integrated chip is connected with the corresponding controling end of described control unit.
Perhaps, described transmitting terminal clock and data recovery unit and described laser drive unit adopt an integrated chip to realize, the differential signal input of described integrated chip is connected with the corresponding pin of described electrical interface by the input coupling capacitance on the one hand, be connected with described transmitting terminal clock and data recovery unit on the other hand, described integrated chip is connected by bus with described control unit, to carry out bus communication.
For receiving terminal clock and data recovery unit, specifically can adopt following implementation structure: described receiving terminal clock and data recovery unit comprises an integrated chip, the differential signal input of described integrated chip is connected with the corresponding circuits of described limiting amplifier by the input coupling capacitance, its output is connected with the corresponding pin of described electrical interface by output coupling capacitor, and the control end of described integrated chip is connected with the corresponding controling end of described control unit.
Perhaps, described receiving terminal clock and data recovery unit and described limiting amplifier adopt an integrated chip to realize, the differential signal output of described integrated chip is connected with the corresponding pin of described electrical interface by output coupling capacitor on the one hand, be connected with described receiving terminal clock and data recovery unit on the other hand, described integrated chip is connected by bus with described control unit, to carry out bus communication.
Further, for farthest reducing the volume of optical module, simplify the optical module circuit structure, described laser drive unit, transmitting terminal clock and data recovery unit, limiting amplifier and receiving terminal clock data unit adopt an integrated chip to realize, the differential signal input of described integrated chip is connected with the corresponding pin of described electrical interface by the input coupling capacitance on the one hand, be connected with described transmitting terminal clock and data recovery unit on the other hand, its output is connected with the corresponding pin of described electrical interface by output coupling capacitor on the one hand, be connected with described receiving terminal clock and data recovery unit on the other hand, described integrated chip is connected by bus with described control unit, to carry out bus communication.
Preferably, aforesaid bus is iic bus.
Compared with prior art, advantage of the present utility model and good effect are:
1. by being set, transmitting terminal clock and data recovery unit carries out Shape correction to sent the signal of telecommunication in the SFP+ optical module, loss of signal and distortion that the high-speed-differential signal of telecommunication that can avoid system end causes through the transmission of integrated circuit board, removed the distortion modulation of laser drive unit to laser, thereby improved the transmission quality of light signal in optical-fibre channel, increased the transmission range of light signal in optical-fibre channel.
2. by being set, the reception signal of receiving terminal clock and data recovery unit being exported by limiting amplifier carries out Shape correction in the SFP+ optical module, broadening and distortion that dispersion and loss owing to optical fiber cause have been compensated, optimized and improved light signal converts the signal of telecommunication to through optical fiber receive module and limiting amplifier quality, improved the sensitivity of receiving terminal, the signal transmission that makes it support better long distance.
After reading the specific embodiment of the present invention by reference to the accompanying drawings, other characteristics of the present utility model and advantage will become clearer.
Description of drawings
Fig. 1 is the structured flowchart of the utility model optical module embodiment one;
Fig. 2 is the structured flowchart of the utility model optical module embodiment two;
Fig. 3 is the structured flowchart of the utility model optical module embodiment three.
Embodiment
Below in conjunction with the drawings and specific embodiments the technical solution of the utility model is described in further detail.
At first, brief description mentality of designing of the present utility model: for the optical module that adopts the SFP+ encapsulating structure, its small volume is convenient to increase system board density, improves terminal access quantity.But the shortcoming that this class optical module exists is that its internal circuit does not have the function of clock and data recovery, so that the easy distorted of the signal of armed signal and reception affects normal transmission and reception.Given this, the utility model proposes a kind of SFP+ optical module that the clock and data recovery unit is set, specifically: for loss and the distortion that solves the emission signal of telecommunication affects driver element to the problem of the modulation of laser, front end in laser drive unit is provided with the transmitting terminal clock and data recovery unit that is connected with this laser drive unit, in order to the signal of telecommunication to be launched from the optical module electrical interface is carried out Shape correction, to remove laser drive unit to the distortion modulation of laser, thereby improve light signal at the transmission quality of optical-fibre channel, increase light signal in the transmission range of optical-fibre channel; Simultaneously, be the distortion that solves the reception signal of telecommunication of changing out through optical fiber receive module and limiting amplifier even the problem that error code occurs, be provided with coupled receiving terminal clock and data recovery unit in the rear end of limiting amplifier, carry out Shape correction with the reception signal of telecommunication to limiting amplifier output, broadening and distortion that compensation causes owing to dispersion and the loss of optical fiber, optimize and improve light signal converts the signal of telecommunication to through optical fiber receive module and limiting amplifier quality, and then the sensitivity that improves receiving terminal, the signal transmission that makes it support better long distance.
Difference according to the circuit unit integrated level, the optical module that is provided with transmitting terminal clock and data recovery unit and receiving terminal clock and data recovery unit can adopt different structures to realize, the specific implementation structure can be referring to figs. 1 to three embodiment and following description to these three embodiment shown in Figure 3.
Please refer to Fig. 1, this Figure 1 shows that the structured flowchart of the utility model optical module embodiment one.
As shown in Figure 1, this embodiment adopts the optical module of SFP+ encapsulating structure to include laser drive unit, limited range enlargement unit, control unit, electrical interface and light emission component and optical fiber receive module, in addition, also include transmitting terminal clock and data recovery unit and receiving terminal clock and data recovery unit.
Wherein, transmitting terminal clock and data recovery unit is arranged on the front end of laser drive unit, also namely is arranged between electrical interface and the laser drive unit.Transmitting terminal clock and data recovery unit includes an integrated chip U1, the differential signal input TDP of U1 is connected with TX-with the corresponding pin TX+ of electrical interface with C2 by input coupling capacitance C1 respectively with TDN, and the differential signal output of U1 is connected with the corresponding circuits of laser drive unit with C4 by output coupling capacitor C3.In addition, the control end of U1 also is connected with the corresponding controling end of control unit.
Receiving terminal clock and data recovery unit is arranged on the rear end of limiting amplifier, also namely is arranged between limiting amplifier and the electrical interface.Receiving terminal clock and data recovery unit includes an integrated chip U2, the differential signal input of U2 is connected with the corresponding circuits of limiting amplifier with C6 by input coupling capacitance C5, and its output RDP is connected with RX-with the RX+ of electrical interface with C8 by output coupling capacitor C7 respectively with RDN.And the control end of U2 also is connected with the corresponding control end of control unit.
The signals transmission of the optical module of this embodiment is as follows: the high-speed-differential signal of telecommunication of system end is transferred to the electrical interface of optical module through integrated circuit board, by TX+ pin and the output of TX-pin of module electric interface, input to respectively the transmitting terminal clock and data recovery unit of optical module through inputting coupling capacitance C1 and C2 again.The signal of telecommunication can exist decay and distortion through the integrated circuit board transmission, utilizing transmitting terminal clock and data recovery unit that the differential electric signal of input is carried out shaping recovers with synchronously, can recover good signal, the signal of telecommunication after the shaping inputs to respectively the related circuit of laser drive unit by output coupling capacitor C3 and C4 through output pin, and then be modulated on the light emission component, drive its utilizing emitted light signal, the light signal of emission is exported after being coupled to optical fiber.
The light signal that comes through Optical Fiber Transmission is received by the optical fiber receive module of optical module, and then converts differential electric signal to, and the signal of telecommunication after the conversion inputs to limiting amplifier and amplifies output.Because dispersion and the loss of long optical fibers, the light signal that optical fiber receive module receives can produce pulse stretching and distortion, the phenomenons such as large shake and distortion then can appear in the signal of telecommunication through limiting amplifier amplification, this signal transfers to receiving terminal clock and data recovery unit by input coupling capacitance C5 and C6 respectively through the output pin of limiting amplifier and carries out shaping and clock and data recovery, obtain the preferably signal of telecommunication, the signal of telecommunication after the shaping is input on the system equipment end finally by RX+ pin and the RX-pin of module electric interface.
And the corresponding controling end of control unit is electrically connected with the corresponding control end of the transmitting terminal clock and data recovery unit that independently separates, laser drive unit, limiting amplifier and receiving terminal clock and data recovery unit, and it is controlled and parameter adjustment.Working under the unified control of control unit in each unit, finish transmitting and receiving and the Working Status Monitoring of whole optical module of light signal, and so that the recovery capability of signal reaches optimum.
Please refer to Fig. 2, this Fig. 2 shows the structured flowchart of the utility model optical module embodiment two.
As shown in Figure 2, the basic structure of the optical module of this embodiment two is identical with Fig. 1 embodiment one, also includes laser drive unit, limited range enlargement unit, control unit, electrical interface, light emission component, optical fiber receive module and transmitting terminal clock and data recovery unit and receiving terminal clock and data recovery unit.Different from embodiment one is that the transmitting terminal clock and data recovery unit of this embodiment two and laser drive unit adopt an integrated chip U3 to realize.U3 differential signal input TDP is connected with TX-with the corresponding pin TX+ of electrical interface with C2 by input coupling capacitance C1 on the one hand with TDN, be connected with transmitting terminal clock and data recovery unit among the U3 on the other hand, and U3 and control unit by bus, be connected such as iic bus, to carry out bus communication.In addition, receiving terminal clock and data recovery unit and limiting amplifier adopt an integrated chip U4 to realize.The differential signal output RDP of U4 is connected with corresponding pin RX+ and the RX-of electrical interface with C8 by output coupling capacitor C7 on the one hand with RDN, be connected with receiving terminal clock and data recovery unit among the U4 on the other hand, and U4 also by bus, be connected with control unit such as iic bus, to carry out bus communication.The signals transmission of whole optical module is identical with embodiment one, does not repeat them here.
By selecting the higher integrated chip of integrated level to realize the different units function, can further reduce the volume of optical module, be convenient to fabric swatch and the circuit design of optical module circuit board.
Except the implementation structure scheme of above-described embodiment one and embodiment two, these two embodiment can also be combined, for example, transmitting terminal clock and data recovery unit adopts embodiment one described independent integrated chip and receiving terminal clock and data recovery unit and limiting amplifier employing embodiment two described integrated chips; Perhaps, receiving terminal clock and data recovery unit adopts embodiment one described independent integrated chip and transmitting terminal clock and data recovery unit and laser drive unit employing embodiment two described integrated chips.All these implementations all belong to protection category of the present utility model.
For further simplifying the circuit structure of optical module, farthest reducing the volume of optical module, optical module can also adopt the structured flowchart of the embodiment three shown in Fig. 3 to realize.
As shown in Figure 3, in this embodiment three, laser drive unit, transmitting terminal clock and data recovery unit, limiting amplifier and receiving terminal clock data unit adopt an integrated chip U5 to realize, the differential signal input TDP of U5 is connected with TX-with the corresponding pin TX+ of electrical interface with C2 by input coupling capacitance C1 on the one hand with TDN, be connected with transmitting terminal clock and data recovery unit among the U5 on the other hand, the output RDP of U5 is connected with RX-with the corresponding pin RX+ of electrical interface with C8 by output coupling capacitor C7 on the one hand with RDN, be connected with receiving terminal clock and data recovery unit among the U5 on the other hand, and U5 also passes through bus with control unit, be connected such as iic bus, to carry out bus communication, the emission of settling signal under the control of control unit, receive and monitoring.
Above embodiment is only in order to illustrating the technical solution of the utility model, but not limits it; Although with reference to previous embodiment the utility model is had been described in detail, for the person of ordinary skill of the art, still can make amendment to the technical scheme that previous embodiment is put down in writing, perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of the utility model technical scheme required for protection.
Claims (9)
1. optical module, this optical module adopts the SFP+ encapsulating structure, comprise laser drive unit, limiting amplifier, control unit and electrical interface, it is characterized in that, also include the transmitting terminal clock and data recovery unit that is arranged on described laser drive unit front end, is connected with laser drive unit and the receiving terminal clock and data recovery unit that is arranged on described limiting amplifier rear end, is connected with limiting amplifier; Input to described transmitting terminal clock data unit from the signal of telecommunication to be launched of described electrical interface and carry out signal shaping, electric signal transmission after the shaping is to described laser drive unit, reception electric signal transmission to the described receiving terminal clock and data recovery unit of described limiting amplifier output carries out signal shaping, and the signal of telecommunication after the shaping is exported from described electrical interface as receiving the signal of telecommunication.
2. optical module according to claim 1, it is characterized in that, described transmitting terminal clock and data recovery unit comprises an integrated chip, the differential signal input of described integrated chip is connected with the corresponding pin of described electrical interface by the input coupling capacitance, its output is connected with the corresponding circuits of described laser drive unit by output coupling capacitor, and the control end of described integrated chip is connected with the corresponding controling end of described control unit.
3. optical module according to claim 1, it is characterized in that, described transmitting terminal clock and data recovery unit and described laser drive unit adopt an integrated chip to realize, the differential signal input of described integrated chip is connected with the corresponding pin of described electrical interface by the input coupling capacitance on the one hand, be connected with described transmitting terminal clock and data recovery unit on the other hand, described integrated chip is connected by bus with described control unit, to carry out bus communication.
4. optical module according to claim 3 is characterized in that, described bus is iic bus.
5. according to claim 2 or 3 described optical modules, it is characterized in that, described receiving terminal clock and data recovery unit comprises an integrated chip, the differential signal input of described integrated chip is connected with the corresponding circuits of described limiting amplifier by the input coupling capacitance, its output is connected with the corresponding pin of described electrical interface by output coupling capacitor, and the control end of described integrated chip is connected with the corresponding controling end of described control unit.
6. according to claim 2 or 3 described optical modules, it is characterized in that, described receiving terminal clock and data recovery unit and described limiting amplifier adopt an integrated chip to realize, the differential signal output of described integrated chip is connected with the corresponding pin of described electrical interface by output coupling capacitor on the one hand, be connected with described receiving terminal clock and data recovery unit on the other hand, described integrated chip is connected by bus with described control unit, to carry out bus communication.
7. optical module according to claim 6 is characterized in that, described bus is iic bus.
8. optical module according to claim 1, it is characterized in that, described laser drive unit, transmitting terminal clock and data recovery unit, limiting amplifier and receiving terminal clock data unit adopt an integrated chip to realize, the differential signal input of described integrated chip is connected with the corresponding pin of described electrical interface by the input coupling capacitance on the one hand, be connected with described transmitting terminal clock and data recovery unit on the other hand, its output is connected with the corresponding pin of described electrical interface by output coupling capacitor on the one hand, be connected with described receiving terminal clock and data recovery unit on the other hand, described integrated chip is connected by bus with described control unit, to carry out bus communication.
9. optical module according to claim 8 is characterized in that, described bus is iic bus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220349837 CN202679375U (en) | 2012-07-19 | 2012-07-19 | Optical module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220349837 CN202679375U (en) | 2012-07-19 | 2012-07-19 | Optical module |
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| CN202679375U true CN202679375U (en) | 2013-01-16 |
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| CN 201220349837 Expired - Fee Related CN202679375U (en) | 2012-07-19 | 2012-07-19 | Optical module |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104301698A (en) * | 2014-10-23 | 2015-01-21 | 深圳市易飞扬通信技术有限公司 | Optical cable interface system for transmitting HDMI signals |
| CN104426052A (en) * | 2013-09-02 | 2015-03-18 | 华为技术有限公司 | Optical device packaging device and optical module |
| WO2015188451A1 (en) * | 2014-06-10 | 2015-12-17 | 中兴通讯股份有限公司 | Optical module interface |
| CN105577270A (en) * | 2016-01-05 | 2016-05-11 | 深圳市极致兴通科技有限公司 | Clock extraction device, clock extraction method and eye pattern testing equipment |
| CN107592511A (en) * | 2017-09-21 | 2018-01-16 | 武汉恒泰通技术有限公司 | A kind of video optical module that can reduce shake |
| CN111835423A (en) * | 2020-08-07 | 2020-10-27 | 武汉锐奥特科技有限公司 | Communication system of QSFP28 type packaged 100G optical module |
| CN111953419A (en) * | 2019-05-16 | 2020-11-17 | 青岛海信宽带多媒体技术有限公司 | Optical module |
-
2012
- 2012-07-19 CN CN 201220349837 patent/CN202679375U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104426052A (en) * | 2013-09-02 | 2015-03-18 | 华为技术有限公司 | Optical device packaging device and optical module |
| CN104426052B (en) * | 2013-09-02 | 2019-01-08 | 华为技术有限公司 | A kind of package of optical device device and optical module |
| WO2015188451A1 (en) * | 2014-06-10 | 2015-12-17 | 中兴通讯股份有限公司 | Optical module interface |
| CN104301698A (en) * | 2014-10-23 | 2015-01-21 | 深圳市易飞扬通信技术有限公司 | Optical cable interface system for transmitting HDMI signals |
| CN105577270A (en) * | 2016-01-05 | 2016-05-11 | 深圳市极致兴通科技有限公司 | Clock extraction device, clock extraction method and eye pattern testing equipment |
| CN107592511A (en) * | 2017-09-21 | 2018-01-16 | 武汉恒泰通技术有限公司 | A kind of video optical module that can reduce shake |
| CN111953419A (en) * | 2019-05-16 | 2020-11-17 | 青岛海信宽带多媒体技术有限公司 | Optical module |
| CN111953419B (en) * | 2019-05-16 | 2022-08-02 | 青岛海信宽带多媒体技术有限公司 | Optical module |
| CN111835423A (en) * | 2020-08-07 | 2020-10-27 | 武汉锐奥特科技有限公司 | Communication system of QSFP28 type packaged 100G optical module |
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| CF01 | Termination of patent right due to non-payment of annual fee |
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| CF01 | Termination of patent right due to non-payment of annual fee |