CN204993356U - In -band passes optical module of supervisory signal thoroughly based on amplitude modulation - Google Patents
In -band passes optical module of supervisory signal thoroughly based on amplitude modulation Download PDFInfo
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- CN204993356U CN204993356U CN201520542153.9U CN201520542153U CN204993356U CN 204993356 U CN204993356 U CN 204993356U CN 201520542153 U CN201520542153 U CN 201520542153U CN 204993356 U CN204993356 U CN 204993356U
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Abstract
The utility model discloses an in -band passes optical module of supervisory signal thoroughly based on amplitude modulation belongs to the communication technology field. Modulated circuit, laser drive circuit, laser instrument, electric absorption signal modulated circuit, electroabsorption modulator, avalanche photodiode, transconductance amplifier, limiting amplifier, image current circuit, low frequency demodulation circuit are crossed including low -speed baseband range to the optical module. Compare in traditional optical module, this scheme the optical module pass through the amplitude modulation loading with the supervisory signal and to the envelope of bearer service signal, with bearer service signal sharing optical cable and passageway resource, has practiced thrift the passageway resource, pass through moreover the supervisory signal that passes with the institute bearer service signaling protocol irrelevant, high use flexibility has, because optical module internal integration low -speed baseband signal modem unit need not the outside extra light functional unit that increases, just can realize that passing through of supervisory signal passes, is the solution that possesses economic benefits most to the applied scene that needs the transmission monitoring signal.
Description
Technical field
The utility model relates to communication technical field, and particularly the communications field such as Optical Transmission Network OTN, mobile forward pass, mobile retransmission, fixed broadband access, big customer's access via telephone line, particularly relates to a kind of optical module based on transparent transmission pilot signal in the band of amplitude modulation(PAM).
Background technology
The continuous expansion of communication network primary transmission capacity and speed improve constantly the prevailing transmission means making optical fiber communication become present information network.In present optical communication network, the kind as the optical transceiver module of one of core light electronic device gets more and more, and require also more and more higher, complexity also develops with surprising rapidity.
Meanwhile, increasing optical fiber communication application scenarios requires that optical transceiver module can not only transmit its service signal carried, and also wants to transmit various management and pilot signal simultaneously.Because the business of carrying varies, in order to make management and monitor message not rely on service signal, traditional method opens up a special wavelength channel to carry out transmitting, monitoring signal.
Tradition optical transceiver module does not possess transmitting business signal and pilot signal function simultaneously, operator is made to have to increase extra optical cable and channel resource at the various application scenarios of transmitting, monitoring signal that needs, have to increase extra optical transceiver module and deciliter wave device, these all bring such as input cost to rise to operator, the availability of frequency spectrum is not high, the disunity of many standards and multi-protocols, the problems such as cost of equipment is expensive.
Utility model content
The utility model proposes a kind of optical module based on transparent transmission pilot signal in the band of amplitude modulation(PAM), can be good at solving the problems referred to above in background technology.This programme is loaded on the envelope of institute's bearer service signal by pilot signal being adopted amplitude modulation(PAM), with bearer service Signal share optical cable and channel resource, channel resource can be saved to greatest extent, and transparent transmission pilot signal and bearer service signaling protocol have nothing to do, there is the use flexibility of height, to the application scenarios needing transmitting, monitoring signal, it is the solution of most economic benefit.
The technical solution adopted in the utility model is:
Based on an optical module for transparent transmission pilot signal in the band of amplitude modulation(PAM), described optical module, comprises transmitting element and receiving element; Described transmitting element, the electroabsorption modulator of the light wave sent by laser that comprising the low speed baseband amplitude overmodulated circuit for base band supervisory signal being modulated into low-speed voltage modulation signal, being used for low-speed voltage modulation signal to be transformed into the drive circuit for laser of low speed current modulated, is used for loading the laser of low speed current modulated, is used for service signal to generate the electric absorption signal modulation circuit of High-speed Electric pulse signal, is used for being controlled whether to absorb by High-speed Electric pulse signal; Described receiving element, comprise the light signal for receiving from exterior light network and light signal is converted to current signal avalanche photodide, be used for main road current pulse signal to convert to voltage pulse signal trsanscondutance amplifier, be used for voltage pulse signal shaping recover receive service signal limiting amplifier, be used for branch current signal to be transformed into the current pulse signal proportional with main road current signal circuit mirror current, be used for current pulse signal being demodulated the low frequency demodulator circuit receiving base band low speed monitoring signal;
Wherein, described low speed baseband amplitude overmodulated circuit is connected with laser by drive circuit for laser, and described electric absorption signal modulation circuit is connected with electroabsorption modulator, and described laser is connected with electroabsorption modulator; A wherein output port of described avalanche photodide is connected with limiting amplifier by trsanscondutance amplifier, and another output port of described avalanche photodide is connected with low frequency demodulator circuit by circuit mirror current.
Wherein, described low speed baseband amplitude overmodulated circuit, comprises the first digital to analog converter of the modulation depth for determining baseband amplitude ovennodulation signal and the second digital to analog converter and the amplitude modulator for modulating baseband amplitude ovennodulation signal amplitude;
Wherein, the output of described first digital to analog converter and the output of the second digital to analog converter are connected the input of described amplitude modulator respectively.
Wherein, described low frequency demodulator circuit, comprise for the high frequency service signal in filtering current pulse signal with retain low frequency pilot signal low-pass filter circuit, for low-frequency current signal is converted to low-frequency voltage signal mutual conductance amplifying circuit, be used for low-frequency voltage signal to recover the comparison decision circuit receiving base band low frequency pilot signal;
Wherein, described low-pass filter circuit by mutual conductance amplifying circuit with compare decision circuit and be connected.
Wherein, described circuit mirror current adopts mirror current source to produce the road branch current equal with main road size of current, or adopts current sampling circuit to convert main road electric current to voltage signal with main road current in proportion by current/voltage translation circuit.
A kind of optical communication system, comprise, the first optical transceiver module and the second optical transceiver module, described first optical transceiver module is connected with the second optical transceiver module by optical communication network;
Wherein, described first optical transceiver module and the second optical transceiver module are optical module described above.
Beneficial effect:
A kind of optical module based on transparent transmission pilot signal in the band of amplitude modulation(PAM) described in the utility model, comprises transmitting element and receiving element; Described transmitting element, the electroabsorption modulator of the light wave sent by laser that comprising the low speed baseband amplitude overmodulated circuit for base band supervisory signal being modulated into low-speed voltage modulation signal, being used for low-speed voltage modulation signal to be transformed into the drive circuit for laser of low speed current modulated, is used for loading the laser of low speed current modulated, is used for service signal to generate the electric absorption signal modulation circuit of High-speed Electric pulse signal, is used for being controlled whether to absorb by High-speed Electric pulse signal; Described receiving element, comprise the light signal for receiving from exterior light network and light signal is converted to current signal avalanche photodide, be used for main road current pulse signal to convert to voltage pulse signal trsanscondutance amplifier, be used for voltage pulse signal shaping recover receive service signal limiting amplifier, be used for branch current signal to be transformed into the current pulse signal proportional with main road current signal circuit mirror current, be used for current pulse signal being demodulated the low frequency demodulator circuit receiving base band low speed monitoring signal.Visible, optical module described in the utility model is be carried on optical service signal envelope due to pilot signal, therefore, without the need to additionally increasing light path, can share existing optical cable and conduit resource to greatest extent; Because pilot signal is carried on optical service signal envelope, therefore, the program and communication protocol have nothing to do, and have flexibility; Owing to additionally increasing light functional unit without the need to outside, program Optimum cost, most economic worth.
Accompanying drawing explanation
Fig. 1 is the internal structure functional block diagram of a kind of optical module based on transparent transmission pilot signal in the band of amplitude modulation(PAM) that the utility model embodiment provides.
Fig. 2 is the functional block diagram of the low frequency base band amplitude overmodulated circuit that the utility model embodiment provides.
Fig. 3 is the functional block diagram of the low frequency demodulator circuit that the utility model embodiment provides.
Fig. 4 is a kind of point-to-point communication application scenarios that the utility model embodiment provides.
Fig. 5 is the oscillogram of the transmission base band supervisory signal that the utility model embodiment provides.
Fig. 6 is the oscillogram of the low-speed voltage modulation signal that the utility model embodiment provides.
Fig. 7 is the oscillogram of the bearer service signal of the pilot signal information of carrying that the utility model embodiment provides.
In figure:
10: the first optical transceiver modules; 20: the second optical transceiver modules;
11: laser; 21: avalanche photodide;
12: electroabsorption modulator; 22: circuit mirror current;
13: drive circuit for laser; 23: trsanscondutance amplifier;
14: low frequency base band amplitude overmodulated circuit; 24: limiting amplifier;
15: electric absorption signal modulation circuit; 25: low frequency demodulator circuit;
30: optical communication network;
141: the first digital to analog converters;
142: the second digital to analog converters;
143: amplitude modulator;
251: low-pass filter circuit;
252: mutual conductance amplifying circuit;
253: compare decision circuit.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the utility model is described in detail.
Fig. 1 is the internal structure functional block diagram of a kind of optical module based on transparent transmission pilot signal in the band of amplitude modulation(PAM) that the utility model embodiment provides.As shown in Figure 1, the utility model proposes a kind of optical module based on transparent transmission pilot signal in the band of amplitude modulation(PAM), comprise transmitting element and receiving element; Described transmitting element, the electroabsorption modulator 12 of the light wave sent by laser 11 that comprising the low frequency base band amplitude overmodulated circuit 14 for base band supervisory signal being modulated into low-speed voltage modulation signal, being used for low-speed voltage modulation signal to be transformed into the drive circuit for laser 13 of low speed current modulated, is used for loading the laser 11 of low speed current modulated, is used for service signal to generate the electric absorption signal modulation circuit 15 of High-speed Electric pulse signal, is used for being controlled whether to absorb by High-speed Electric pulse signal; Described receiving element, comprise the light signal for receiving from exterior light network and light signal is converted to current signal avalanche photodide 21, be used for main road current pulse signal to convert to voltage pulse signal trsanscondutance amplifier 23, be used for voltage pulse signal shaping recover receive service signal limiting amplifier 24, be used for branch current signal to be transformed into the current pulse signal proportional with main road current signal circuit mirror current 22, be used for current pulse signal being demodulated the low frequency demodulator circuit 25 receiving base band low speed monitoring signal.
Below in conjunction with accompanying drawing 1, the internal structure of optical module described in the utility model and the interconnection of each functional unit are described further.
Described low speed baseband amplitude overmodulated circuit 14 is connected with laser 11 by drive circuit for laser 13, and described electric absorption signal modulation circuit 15 is connected with electroabsorption modulator 12, and described laser 11 is connected with electroabsorption modulator 12; A wherein output port of described avalanche photodide 21 is connected with limiting amplifier 24 by trsanscondutance amplifier 23, and another output port of described avalanche photodide 21 is connected with low frequency demodulator circuit 25 by circuit mirror current 22.
As shown in Figure 1, the signal of described optical module bearer service signal flows to and is:
Tx1 sends service signal, Tx1 generates High-speed Electric pulse signal Vx1 by electric absorption signal modulation circuit 15, Vx1 controls electroabsorption modulator 12 and goes absorb or do not absorb the light wave sent by laser 11, reaches the object making the powered pulse code current control of output optical pulse code stream.Light pulse code stream is transmitted by exterior light network 30, avalanche photodide 21 receives the light pulse code stream from exterior light network 30, main road current impulse Ix2 converts potential pulse Vx2 to by trsanscondutance amplifier 23, Vx2 carries out shaping by limiting amplifier 24, recovers and receives service signal Rx2.
It should be noted that, electroabsorption modulator 12 is the optical signal modulation devices utilizing exciton absorption effect in semiconductor to be made, and fast response time, operating power consumption is low.Avalanche photodide 21 is that a kind of light of P-N junction type detects diode, utilizes the avalanche multiplication effect of charge carrier to amplify photosignal, can convert light pulse to current impulse.
As shown in Figure 1, the signal of the low speed monitoring signal of described optical module transmission flows to and is:
S (t) 1 sends base band supervisory signal (as shown in Figure 5), s (t) 1 is modulated into low-speed voltage modulation signal V (t) 1(as shown in Figure 6 by low frequency base band amplitude overmodulated circuit 14), can further illustrate after the internal structure of low speed baseband amplitude overmodulated circuit 14.V (t) 1 is transformed into low speed current modulated I (t) 1, I (t) 1 by drive circuit for laser 13 and is used for drive laser 11.Due to the proportionate relationship that the light output amount of laser 11 is certain with drive current I (t) 1 one-tenth loaded thereon, the luminous power amplitude that thus laser 11 exports controls indirectly by base band low frequency pilot signal s (t) 1.Laser 11 is as the light source of electroabsorption modulator 12, base band low speed monitoring signal s (t) 1 can be loaded into the envelope sending service signal Tx1 to get on, the bearer service signal (as shown in Figure 7) of the pilot signal information of carrying be modulated into is sent to exterior light network 30.Avalanche photodide 21 receives the light signal from exterior light network 30, converts thereof into current signal, and main road current signal Ix2 is recovered by trsanscondutance amplifier 23, limiting amplifier 24 and receives service signal Rx2.Branch current signal is transformed into current pulse signal I (t) 2, I (t) 2 equal or proportional with main road current signal by circuit mirror current 22 and is demodulated by low frequency demodulator circuit 25 and receive base band low speed monitoring signal d (t) 2.Can further illustrate after the internal structure of low frequency demodulator circuit 25.
It should be noted that, the characteristic of temperature on laser 11 has larger impact, in order to make laser 11 stable output power, generally needs to carry out temperature control to it, and described laser 11 is usually with TEC thermostatic control module.
Below in conjunction with accompanying drawing 2, the internal structure of low frequency base band amplitude overmodulated circuit 14 and the interconnection of each functional unit are described further.
Fig. 2 describes a kind of embodiment of low frequency base band amplitude overmodulated circuit 14, includes the first digital to analog converter 141 of the modulation depth for determining baseband amplitude ovennodulation signal and the second digital to analog converter 142 and the amplitude modulator 143 for modulating baseband amplitude ovennodulation signal amplitude.Wherein, output Va and the output Vb of the second digital to analog converter 142 of the first digital to analog converter 141 are connected the input of amplitude modulator 143 respectively.Va, Vb size is adjustable, and the size of Va, Vb determines the modulation depth of baseband amplitude ovennodulation signal, and modulation depth needs to weigh between bearer service signal and low speed monitoring signal performance.Modulation depth is larger, and low speed monitoring signal receiving sensitivity is higher, the error rate is lower, and bearer service signal receiving sensitivity is lower, and the error rate is higher; Otherwise modulation depth is less, low speed monitoring signal receiving sensitivity is lower, the error rate is higher, and bearer service signal receiving sensitivity is higher, and the error rate is lower.
Below in conjunction with accompanying drawing 3, the internal structure of low frequency demodulator circuit 25 and the interconnection of each functional unit are described further.
Fig. 3 describes a kind of embodiment of low frequency demodulator circuit 25, include for the high frequency service signal in filtering current pulse signal with retain low frequency pilot signal low-pass filter circuit 251, for low-frequency current signal is converted to low-frequency voltage signal mutual conductance amplifying circuit 252, be used for low-frequency voltage signal to recover the comparison decision circuit 253 receiving base band low frequency pilot signal, wherein, described low-pass filter circuit 251 by mutual conductance amplifying circuit 252 with compare decision circuit 253 and be connected.
Current pulse signal I (t) 2 includes high frequency service signal and low frequency pilot signal simultaneously, I (t) 2 is by low pass filter 251 filtering high frequency service signal composition, only retain low frequency pilot signal I (t) 2 ', low frequency pilot signal I (t) 2 ' is by mutual conductance amplifying circuit 252, low-frequency current signal is converted to low-frequency voltage signal V(t) 2, low-frequency voltage signal V(t) 2 recover receive base band low frequency pilot signal d (t) 2 by comparing decision circuit 253.
In this programme, described circuit mirror current 22 can adopt mirror current source to produce the road branch current equal with main road size of current, and current sampling circuit also can be adopted to convert main road electric current to voltage signal with main road current in proportion by current/voltage translation circuit.
Below in conjunction with embodiment and Fig. 4, application scenarios of the present utility model is described further.
Fig. 4 describes a kind of application scenarios using optical module described in the utility model to carry out point-to-point communication.As shown in Figure 4, a kind of optical communication system, include the first transmitting-receiving of optical transceiver module 10, second light mould 20, optical communication network 30, described first optical transceiver module 10 is connected with the second optical transceiver module 20 by optical communication network 30.What the first optical transceiver module 10 in described optical communication system and the second optical transceiver module 20 all adopted is the optical module based on transparent transmission pilot signal in the band of amplitude modulation(PAM) described above.
As shown in Figure 4, Tx1 is the transmission service signal of the first optical transceiver module 10, s (t) 1 is the transmission low speed monitoring signal of the first optical transceiver module 10, Rx1 is the reception service signal of the first optical transceiver module 10, and d (t) 1 is the reception low speed monitoring signal of the first optical transceiver module 10; Tx2 is the transmission service signal of the second optical transceiver module 20, s (t) 2 is transmission low speed monitoring signal of the second optical transceiver module 20, Rx2 is the reception service signal of the second optical transceiver module 20, and d (t) 2 is reception low speed monitoring signal of the second optical transceiver module 20.
The s (t) 1 carrying low speed monitor message is loaded on the envelope of service signal Tx1 by baseband amplitude ovennodulation by the first optical transceiver module 10, the bearer service signal (as shown in Figure 7) of the pilot signal information of carrying be modulated into, s (t) 1 and Tx1 share optical cable and channel resource, the common light-receiving port being sent to the second optical transceiver module 20 by exterior light communication network 30, second optical transceiver module 20 carries out demodulation to the modulation signal received, and recovers respectively and receives service signal Rx2 and receive low speed monitoring signal d (t) 2.In like manner, the s (t) 2 carrying low speed monitor message is loaded on the envelope of service signal Tx2 by baseband amplitude ovennodulation by the second optical transceiver module 20, s (t) 2 and Tx2 share optical cable and channel resource, the common light-receiving port being sent to the first optical transceiver module 10 by exterior light communication network 30, first optical transceiver module 10 carries out demodulation to the modulation signal received, and recovers respectively and receives service signal Rx1 and receive low speed monitoring signal d (t) 1.
In sum, according to content disclosed in the utility model, can accomplish the end in view, the optical module based on transparent transmission pilot signal in the band of amplitude modulation(PAM) provided, can the transparent transmission difficult problem of cost-effective solution in band supervisory signal, there is high industrial utilization.
The described optical module based on transparent transmission pilot signal in the band of amplitude modulation(PAM), both can be applicable to design optical transceiver module, also can be applicable to the other products based on the program.
Above-mentioned explanation and accompanying drawing are only for illustration of embodiment of the present utility model, all those skilled in the art, do not departing within the scope of the utility model that appended claims limits, still can make a variety of changes the utility model in the form and details, it does not depart from technology of the present utility model and spirit.
Claims (4)
1. based on an optical module for transparent transmission pilot signal in the band of amplitude modulation(PAM), it is characterized in that: described optical module, comprise transmitting element and receiving element, described transmitting element, comprise the low speed baseband amplitude overmodulated circuit (14) for base band supervisory signal being modulated into low-speed voltage modulation signal, for low-speed voltage modulation signal is transformed into low speed current modulated drive circuit for laser (13), for load low speed current modulated laser (11), for service signal is generated High-speed Electric pulse signal electric absorption signal modulation circuit (15), for controlling whether to absorb the electroabsorption modulator (12) of the light wave sent by laser (11) by High-speed Electric pulse signal, described receiving element, comprise the light signal for receiving from exterior light network and light signal converted to the avalanche photodide (21) of current signal, for main road current pulse signal being converted to the trsanscondutance amplifier (23) of voltage pulse signal, for recovering the limiting amplifier (24) receiving service signal to voltage pulse signal shaping, for branch current signal being transformed into the circuit mirror current (22) of the current pulse signal proportional with main road current signal, for current pulse signal being demodulated the low frequency demodulator circuit (25) receiving base band low speed monitoring signal,
Wherein, described low speed baseband amplitude overmodulated circuit (14) is connected with laser (11) by drive circuit for laser (13), described electric absorption signal modulation circuit (15) is connected with electroabsorption modulator (12), and described laser (11) is connected with electroabsorption modulator (12); A wherein output port of described avalanche photodide (21) is connected with limiting amplifier (24) by trsanscondutance amplifier (23), and another output port of described avalanche photodide (21) is connected with low frequency demodulator circuit (25) by circuit mirror current (22).
2. a kind of optical module based on transparent transmission pilot signal in the band of amplitude modulation(PAM) according to claim 1, it is characterized in that: described low speed baseband amplitude overmodulated circuit (14), comprising first digital to analog converter (141) of the modulation depth for determining baseband amplitude ovennodulation signal and the second digital to analog converter (142) and the amplitude modulator (143) for modulating baseband amplitude ovennodulation signal amplitude;
Wherein, output and the output of the second digital to analog converter (142) of described first digital to analog converter (141) are connected the input of described amplitude modulator (143) respectively.
3. a kind of optical module based on transparent transmission pilot signal in the band of amplitude modulation(PAM) according to claim 1, it is characterized in that: described low frequency demodulator circuit (25), comprise for the high frequency service signal in filtering current pulse signal with retain low frequency pilot signal low-pass filter circuit (251), for low-frequency current signal is converted to low-frequency voltage signal mutual conductance amplifying circuit (252), for low-frequency voltage signal being recovered the comparison decision circuit (253) receiving base band low frequency pilot signal;
Wherein, described low-pass filter circuit (251) by mutual conductance amplifying circuit (252) with compare decision circuit (253) and be connected.
4. a kind of optical module based on transparent transmission pilot signal in the band of amplitude modulation(PAM) according to claim 1, it is characterized in that: described circuit mirror current (22) adopts mirror current source to produce the road branch current equal with main road size of current, or adopt current sampling circuit to convert main road electric current to voltage signal with main road current in proportion by current/voltage translation circuit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520542153.9U CN204993356U (en) | 2015-07-24 | 2015-07-24 | In -band passes optical module of supervisory signal thoroughly based on amplitude modulation |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520542153.9U CN204993356U (en) | 2015-07-24 | 2015-07-24 | In -band passes optical module of supervisory signal thoroughly based on amplitude modulation |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104980225A (en) * | 2015-07-24 | 2015-10-14 | 武汉光迅科技股份有限公司 | Optical module of in-band pass through monitoring signal based on amplitude modulation |
| CN109495185A (en) * | 2018-11-14 | 2019-03-19 | 青岛海信宽带多媒体技术有限公司 | Optical module |
| CN109495181A (en) * | 2018-12-07 | 2019-03-19 | 青岛海信宽带多媒体技术有限公司 | Optical module signal processing method, device and optical module |
| CN111262631A (en) * | 2020-01-17 | 2020-06-09 | 烽火通信科技股份有限公司 | Management information processing method, optical module, ONU and application system thereof |
| WO2020259382A1 (en) * | 2019-06-26 | 2020-12-30 | 青岛海信宽带多媒体技术有限公司 | Optical module |
-
2015
- 2015-07-24 CN CN201520542153.9U patent/CN204993356U/en not_active Withdrawn - After Issue
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104980225A (en) * | 2015-07-24 | 2015-10-14 | 武汉光迅科技股份有限公司 | Optical module of in-band pass through monitoring signal based on amplitude modulation |
| CN109495185A (en) * | 2018-11-14 | 2019-03-19 | 青岛海信宽带多媒体技术有限公司 | Optical module |
| CN109495181A (en) * | 2018-12-07 | 2019-03-19 | 青岛海信宽带多媒体技术有限公司 | Optical module signal processing method, device and optical module |
| WO2020259382A1 (en) * | 2019-06-26 | 2020-12-30 | 青岛海信宽带多媒体技术有限公司 | Optical module |
| CN111262631A (en) * | 2020-01-17 | 2020-06-09 | 烽火通信科技股份有限公司 | Management information processing method, optical module, ONU and application system thereof |
| CN111262631B (en) * | 2020-01-17 | 2021-04-06 | 烽火通信科技股份有限公司 | Management information processing method, optical module, ONU and application system thereof |
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| C14 | Grant of patent or utility model | ||
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Granted publication date: 20160120 Effective date of abandoning: 20171003 |