CN104270203A - SFF double-light-emitting module with DDM function and optical communication system - Google Patents
SFF double-light-emitting module with DDM function and optical communication system Download PDFInfo
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- CN104270203A CN104270203A CN201410582004.5A CN201410582004A CN104270203A CN 104270203 A CN104270203 A CN 104270203A CN 201410582004 A CN201410582004 A CN 201410582004A CN 104270203 A CN104270203 A CN 104270203A
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Abstract
The invention discloses an SFF double-light-emitting module with a DDM function. The SFF double-light-emitting module comprises a first emitting unit, a second emitting unit and a micro control unit, wherein the first emitting unit and the second emitting unit are independent from each other; each of the first emitting unit and the second emitting unit comprises a driver and a transmitter optical subassembly (TOSA) which are connected in sequence; the drivers and the TOSAs of the first emitting unit and the second emitting unit are all connected with the micro control unit; a register which is defined according to a preset mode is arranged in the micro control unit, so that the micro control unit is enabled to monitor relevant parameters of the first emitting unit and the second emitting unit. The invention further discloses an optical communication system adopting the SFF double-light-emitting module for communicating. By adopting the SFF double-light-emitting module, DDM parameter monitoring on a double-light-emitting module product can be performed, and two internal emitting lines can be monitored simultaneously.
Description
Technical field
The present invention relates to optical module field, particularly the two light emitting module of a kind of SFF with DDM function and optical communication system.
Background technology
In the application of optical communication, optical module is widely used.Wherein, there is the optical module of DDM function, in real time the running parameter of each module and state can be detected, calibrate and be controlled by software; And do not possess the optical module of DDM, then can not monitor in real time the parameter of each module.
SFF optical module structure is simple, cost is low, reliability is high, is used widely at optical communication field.But according to the agreement of traditional SFF optical module, SFF 2 × 5 optical module does not possess parameter monitoring function, the simulation monitoring that SFF2 × 10 optical module only possesses parameter exports, and need peripheral circuit to carry out AD conversion and calibration, this makes SFF optical module be limited by very large in actual applications.Therefore, exploitation has the SFF optical module of DDM function is necessary.At present, the existing pin of receiver-transmitter integrated module to band DDM function SFF 2 × 10 and the definition of functional realiey.This SFF 2 × 10 receiver-transmitter integrated module, has a transmitter unit, a receiving element and micro controller unit, the basis of traditional SFF receiver-transmitter integrated module adds DDM function, and passes through I
2c bus and equipment realize communicating, and achieve the real-time monitoring to optical module parameter.Such receiver-transmitter integrated module possesses transmitting and the receiving ability of signal simultaneously, may be used on data transmitting/receiving equipment.
If but receiver-transmitter integrated module be applied in only need data to send data transmitting equipment on, then receiving terminal is by idle, causes space waste.Therefore need can utilize existing equipment space for data transmitting equipment exploitation, improve the SFF optical module of efficiency of transmission.At present, there has been SFF 2 × 5 pairs of light emitting modules for data transmitting equipment, if application number is the Chinese utility model patent of 201120021406.X, its concrete disclosed scheme is as follows: it comprises the transmitting circuit that two-way transmits, described transmitting circuit primarily of connect successively for the drive circuit, the laser diode described differential data signals being converted into light signal output that drive differential data input and thermoregulator automated power control APC circuit is carried out to transmitting power.The deficiency of this pair of light emitting module product existence is as follows: it does not have DDM function, and can not monitor inner two-way transmitting line parameter circuit value simultaneously.
Summary of the invention
The object of the invention is to overcome above-mentioned deficiency existing in prior art, the two light emitting module of a kind of SFF with DDM function and optical communication system are provided.Adopt the program can carry out DDM parameter monitoring to two DDM optical module products, and can monitor inner two-way transmitting circuit simultaneously.
In order to realize foregoing invention object, the technical solution used in the present invention is: the two light emitting module of a kind of SFF with DDM function, comprise the first separate transmitter unit of two-way and the second transmitter unit, described first transmitter unit and the second transmitter unit include the driver and light emission component TOSA that are connected successively, also comprise micro-control unit, described first transmitter unit is connected described micro-control unit with the described driver in the second transmitter unit respectively with described TOSA, the register according to predetermined way definition is provided with in described micro-control unit, thus described micro-control unit can be monitored the relevant parameter of described first transmitter unit and the second transmitter unit.
Preferably, described micro-control unit is also for Real-time Collection optical module internal temperature information, according to the temperature characterisitic of the laser in real time temperature information and described TOSA, adjust bias current and/or the modulated current of described laser, and then debug light power and/or the extinction ratio index of optical module.
Preferably, described micro-control unit also to be sampled the electric current of the backlight diode in the described TOSA of the first transmitter unit and the second transmitter unit and then monitoring utilizing emitted light power by ADC.
Preferably, described micro-control unit also gathers optical module information of voltage by ADC.
Preferably, described micro controller unit is integrated with temperature collect module, or connects temperature collect module by ADC.
Preferably, also comprise the first power switch for being connected with external power source and the second power switch, described first power switch connects driver and the light emission component TOSA of described first transmitter unit, and described second power switch connects driver and the light emission component TOSA of described second transmitter unit.
Further, described first power switch and the second power switch can be opened or turn off under outside enable signal effect.
Preferably, describedly to be specially according to predetermined way definition register: on the basis of SFF-8472 protocol definition, setting is redefined to register, redefine receiving element power detection and the related register that SFF-8472 protocol definition removed by the register after arranging, ME for maintenance detect and temperature detection register constant, retaining former transmitter unit related register is the first transmitter unit related register, newly-increased to the second transmitter unit DDM monitoring related register.
Preferably, this optical module adopts 2 × 10 pinouts, wherein the 6 to the 15 pin comprise two transmitter units power supply, differential signal input and enable control, distribute arbitrarily two as I in pin 1 ~ 5 or pin 16 ~ 20
2c bus communication pin.
The present invention also provides a kind of optical communication system, and comprise the two light emitting module of SFF of optical communication equipment and above-described embodiment, described optical communication equipment is connected with the two light emitting module of SFF described at least one.
Compared with prior art, beneficial effect of the present invention:
The two light emitting module of SFF of band DDM function of the present invention and optical communication system, by redefining the register in the micro-control unit in optical module, according to predetermined way definition register, described micro-control unit can be monitored the relevant parameter of described first transmitter unit and the second transmitter unit, simple and convenient.Adopt the program can carry out DDM parameter monitoring to two DDM optical module products, and can monitor inner two-way transmitting circuit simultaneously.
Accompanying drawing illustrates:
Fig. 1 is the two light emitting module block diagram of SFF in the embodiment of the present invention;
Fig. 2 is the two light emitting module pin definitions figure of band DDM function SFF;
Fig. 3 is the two light emitting module I2C interface connection layout of equipment and multiple SFF;
Fig. 4 is that equipment and multiple strap select the two light emitting module I2C interface connection layout of the SFF of function.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail.But this should be interpreted as that the scope of the above-mentioned theme of the present invention is only limitted to following embodiment, all technology realized based on content of the present invention all belong to scope of the present invention.
The present invention is by redefining the register in the micro-control unit in two light emitting module, namely according to predetermined way definition register, described micro-control unit can be monitored the relevant parameter of the first transmitter unit in two light emitting module and the second transmitter unit, solve two problem sending out SFF optical module nil test and monitoring DDM function, illustrate below in conjunction with accompanying drawing.
Figure 1 shows that the embodiment of the present invention one is with the two light emitting module functional block diagram of DDM function SFF, comprise the first separate transmitter unit of two-way (i.e. transmitter unit 1) and the second transmitter unit (i.e. transmitter unit 2), described first transmitter unit and the second transmitter unit include the driver (driver 1 be connected successively, driver 2) and light emission component TOSA (TOSA1, TOSA2), also comprise micro-control unit MCU, described first transmitter unit is connected described micro-control unit MCU with the described driver in the second transmitter unit respectively with described TOSA, the register according to predetermined way definition is provided with in described micro-control unit MCU, the described register according to predetermined way definition makes described micro-control unit MCU can monitor the relevant parameter of described first transmitter unit and the second transmitter unit.The present invention is by redefining the register in the micro-control unit in two light emitting module, namely according to predetermined way definition register, described micro-control unit can be monitored to the relevant parameter (as temperature, voltage, utilizing emitted light power etc.) of the first transmitter unit in two light emitting module and the second transmitter unit.
Concrete, described micro-control unit MCU is also for Real-time Collection optical module internal temperature information, according to the temperature characterisitic of the laser in real time temperature information and described TOSA, adjust bias current and/or the modulated current of described laser, and then debug light power and/or the extinction ratio index of optical module.Described micro-control unit also to be sampled the electric current of the backlight diode in the described TOSA of the first transmitter unit and the second transmitter unit and then monitoring utilizing emitted light power by ADC.Described micro-control unit also gathers optical module information of voltage by ADC.Described micro controller unit MCU is integrated with temperature collect module, or connects temperature collect module by ADC.
Transmitter unit 1 and transmitter unit 2 are separate, to avoid the crosstalk of the two; Micro-control unit MCU controls driving and the modulated current of the laser of transmitter unit 1 and transmitter unit 2 by DAC, and then the power of debugging module bright dipping and extinction ratio index; Micro-control unit MCU is sampled by ADC the electric current of backlight diode of transmitter unit 1 and transmitter unit 2, by backlight diode electrically flow valuve monitoring light power; Described micro-control unit MCU is also by ADC acquisition module temperature and information of voltage; In Fig. 1, Imod_1 is transmitter unit 1 modulated current, Ibias_1 is transmitter unit 1 bias current, Imod_2 is transmitter unit 2 modulated current, Ibias_2 is transmitter unit 2 bias current, described micro-control unit MCU Real-time Collection inside modules temperature information, according to the temperature variant relation of laser parameter, regulate the biased of laser and modulated current in real time, realize digital power and control.
In the present invention, transmitting power controls to be divided other bias current by micro-control unit MCU by controlling controlled current source (controlled current source 1, controlled current source 2, controlled current source 3 and the controlled current source 4) laser completed respectively in two transmitter units and drive modulated current to regulate.Micro-control unit MCU, by the temperature information of acquisition module inside, then varies with temperature relation according to laser parameter, carries out temperature-compensating to laser, to maintain the stable of light power and extinction ratio.This scheme is different from traditional APC and ERC circuit, and circuit structure is more simple, and power consumption can significantly be reduced, and can reduce more power consumptions for two modules.
Traditional APC circuit carries out power control by the mode of closed loop, and circuit, in order to maintain the stable of closed loop, can increase electric current to greatest extent, if can't maintain closed loop, then may occur mistake; Meanwhile, compensate excessive electric current when high temperature can make a big impact to laser life-span.And adopt Digital Power Control scheme of the present invention, when high temperature, MCU according to actual needs, can control laser power levels under the prerequisite meeting communicating requirement, when temperature is higher, allows power suitably to decline under the prerequisite meeting communication requirement; Meanwhile, can maximum current be set, i.e. the safe maximum current of laser works, safety and the reliability of laser can be ensured.
In order to significantly reduce power consumption, this pair of light emitting module also comprises the first power switch for being connected with external power source and the second power switch in one embodiment, described first power switch connects driver and the light emission component TOSA of described first transmitter unit, and described second power switch connects driver and the light emission component TOSA of described second transmitter unit.Described first power switch and the second power switch can be opened or turn off under outside enable signal effect.Concrete, two power switchs are powered for driver and light emission component TOSA respectively simultaneously, Tx-Dis1 and Tx-Dis2 is the enable pin of transmitter unit 1 and transmitter unit 2, Tx-Dis1 with Tx-Dis2 is connected power switch 1 and power switch 2 respectively, for transmit outer enable signal.The enable turn-off function of transmitting terminal of conventional integrated drive chip is that the break-make by controlling laser bias and modulated current realizes, and such scheme is after closedown laser power, and also the needing of driver chip itself consumes a large amount of electric current; The two light emitting module of SFF of the present invention, the enable pin of transmitter unit (Tx-Dis1 and Tx-Dis2) directly controls the shutoff of transmitting terminal voltage (VCC1 and VCC2) by controlling power switch, laser can be turned off together with driver, significantly reduce power consumption.Micro-control unit is powered and directly to be powered by external power source VCC, by the impact whether two transmitter units power.
Preferably, describedly to be specially according to predetermined way definition register: on the basis of SFF-8472 protocol definition, setting is redefined to register, redefine receiving element power detection and the related register that SFF-8472 protocol definition removed by the register after arranging, ME for maintenance detect and temperature detection register constant, retaining former transmitter unit related register is the first transmitter unit related register, newly-increased to the second transmitter unit DDM monitoring related register.
As an example, the register table of comparisons redefining the register after arranging and SFF-8472 protocol definition is as shown in table 1 below.
Table 1
General band DDM optical module is all monitored 5 of module parameters according to SFF-8472 agreement, these parameters are: temperature (address A2H, 96 ~ 97 bytes), voltage (address A2H, 98 ~ 99 bytes), laser bias current (address A2H, 100 ~ 101 bytes), light emitting power (address A2H, 102 ~ 103 bytes), light receiving power (address A2H, 104 ~ 105 bytes).Address A2h 00 ~ 39 byte corresponding with it defines alarm and the alarming threshold of these 5 parameters; Address A2H 112 ~ 117 byte defines alarm and the alarm flag bit of these 5 parameters.
Existing register arranges the monitoring demand that can meet general band DDM receiver-transmitter integrated module, but then can not meet the monitoring to two-way light emitting power for two DDM optical module products.Therefore, need again to arrange register, as shown in table 1, list the part that new register arranges change compared with SFF-8472.By redefining register, eliminate light receiving power monitoring function, and add transmitter unit 2 light emitting power, transmitter unit 2 bias current monitoring function, thus realize the monitoring to two-way light emitting power.
Preferably, this optical module adopts 2 × 10 pinouts, wherein the 6 to the 15 pin comprise two transmitter units power supply, differential signal input and enable control, distribute arbitrarily two as I in pin 1 ~ 5 or pin 16 ~ 20
2c bus communication pin.As an example, in the present embodiment, the 6 to the 15 pin is followed successively by GND2, VCC2, Tx-Dis2, TD2-, TD2+, VCC1, GND1, Tx-Dis1, TD1+, TD1-, distributes arbitrarily two as I in pin 1 ~ 5 or pin 16 ~ 20
2c bus communication pin.
As can be seen from the block diagram of Fig. 1, the two light emitting module of band DDM function SFF of the present invention realizes basic function needs at least 12 interfaces, respectively: two power supply pin, two lower margins, two pairs of differential lines, two enable pin, a pair I
2c bus.Band DDM function SFF is two sends out pin definitions as shown in Figure 2, and wherein the 6 to the 15 pin is followed successively by GND2, VCC2, Tx-Dis2, TD2-, TD2+, VCC1, GND1, Tx-Dis1, TD1+, TD1-.The definition of these 10 pins is as shown in table 2, and these 10 pins are for realizing the signal input of two transmitting terminal unit and controlling, and the position of these ten pin, definition and general SFF 2 × 5 module class are seemingly.
Table 2 SFF 2 × 10 pairs of light emitting module pins describe
| Title | Pin definitions describes |
| GND2 | Second transmitter unit ground |
| VCC2 | Second transmitter unit power supply |
| Tx-Dis2 | The enable pin of second transmitter unit |
| TD2- | Second launches end member non-inverting signal input thereof |
| TD2+ | Second launches end member signal input part in the same way |
| VCC1 | First transmitter unit power supply |
| GND1 | First transmitter unit ground |
| Tx-Dis1 | The enable pin of first transmitter unit |
| TD1+ | First launches end member signal input part in the same way |
| TD1- | First launches end member non-inverting signal input thereof |
| Reserved | SDA, SCL or MOD_SEL interface can be used as |
In micro-control unit MCU, SDA is I2C data wire, and SCL is I2C clock line, and MOD_SEL is I
2the enable pin of C.The two light emitting module of band DDM function SFF of the present invention needs from pin 1 ~ 5 or pin 16 ~ 20, to distribute two as I
2c bus communication pin.Therefore, when pin 6 ~ 15 is constant, all the other pin all can be selected as I
2c bus interface, such module adds the ability with external device communication, and can not increase module and taken up space.Adopt such pinout, can flexibly according to equipment need adjust I
2c bus interface.
The embodiment of the present invention two provides a kind of optical communication system, and comprise the two light emitting module of SFF of optical communication equipment and above-described embodiment, described optical communication equipment is connected with the two light emitting module of SFF described at least one.
Exterior light communication equipment is (as switch, can certainly be the equipment that other can communicate with optical module) communicated by I2C bus with this optical module, under normal circumstances, an equipment will have multiple optical module, equipment needs each optical module of differentiation that can be correct.The connection of equipment and band DDM function SFF pair of light emitting module as shown in Figure 3.Equipment is by an I
2c bus expansion interface, by a road I
2c signal extension is multichannel, and the optical module communicated as required selects a certain road.
I2C connected mode between equipment and optical module, is suitable for the communication that address of devices is multiple optical modules of same address.For the two light emitting module of band DDM function SFF, utilize a reserved pin in pin 1 ~ 5,16 ~ 20 as I
2c communication enabled pin, namely MOD_SEL (this enable pin also can, I
2c is set to long enable), equipment can pass through this enable foot control optical module I
2c communication enabled, to select different optical modules, as shown in Figure 4.
The embodiment of the present invention is by adding a pair I
2c bus interface, this interface can be arranged on Pin locations any in pin 1 ~ 5,16 ~ 20 as required; According to actual needs, I can increased simultaneously
2on the basis of C bus data interface, increase a sheet and select functional interface, this interface can be arranged on any position of all the other pins as required.
The invention provides a kind of two light emitting module of SFF of band DDM function completely newly, by redefining the register in the micro-control unit in two light emitting module, namely according to predetermined way definition register, described micro-control unit can be monitored to the relevant parameter of the first transmitter unit in two light emitting module and the second transmitter unit.By micro-control unit, ADC sampling and calibration are carried out to module parameter, solve two problem sending out SFF optical module nil test and monitoring; The scheme adopting digital power to control, effectively reduces the power consumption of two transmitter units, improves high-temperature behavior; Adopt brand-new transmitting terminal enable circuits design, significantly can reduce power consumption after closedown transmitting power.
By reference to the accompanying drawings the specific embodiment of the present invention is described in detail above, but the present invention is not restricted to above-mentioned execution mode, in the spirit and scope situation of claim not departing from the application, those skilled in the art can make various amendment or remodeling.
Claims (10)
1. the two light emitting module of the SFF with DDM function, comprise the first separate transmitter unit of two-way and the second transmitter unit, described first transmitter unit and the second transmitter unit include the driver and light emission component TOSA that are connected successively, it is characterized in that, also comprise micro-control unit, described first transmitter unit is connected described micro-control unit with the described driver in the second transmitter unit respectively with described TOSA, the register according to predetermined way definition is provided with in described micro-control unit, thus described micro-control unit can be monitored the relevant parameter of described first transmitter unit and the second transmitter unit.
2. the two light emitting module of SFF of band DDM function according to claim 1, it is characterized in that, described micro-control unit is also for Real-time Collection optical module internal temperature information, according to the temperature characterisitic of the laser in real time temperature information and described TOSA, adjust bias current and/or the modulated current of described laser, and then debug light power and/or the extinction ratio index of optical module.
3. the two light emitting module of SFF of band DDM function according to claim 1, it is characterized in that, described micro-control unit also to be sampled the electric current of the backlight diode in the described TOSA of the first transmitter unit and the second transmitter unit and then monitoring utilizing emitted light power by ADC.
4. the two light emitting module of SFF of band DDM function according to claim 1, is characterized in that,
Described micro-control unit also gathers optical module information of voltage by ADC.
5. the two light emitting module of SFF of band DDM function according to claim 1, it is characterized in that, described micro controller unit is integrated with temperature collect module, or connects temperature collect module by ADC.
6. the two light emitting module of SFF of band DDM function according to claim 1, it is characterized in that, also comprise the first power switch for being connected with external power source and the second power switch, described first power switch connects driver and the light emission component TOSA of described first transmitter unit, and described second power switch connects driver and the light emission component TOSA of described second transmitter unit.
7. the two light emitting module of SFF of band DDM function according to claim 6, it is characterized in that, described first power switch and the second power switch can be opened or turn off under outside enable signal effect.
8. the two light emitting module of the SFF of the band DDM function according to any one of claim 1-7, is characterized in that, is describedly specially according to predetermined way definition register:
The basis of SFF-8472 protocol definition redefines setting to register, redefine receiving element power detection and the related register that SFF-8472 protocol definition removed by the register after arranging, ME for maintenance detect and temperature detection register constant, retaining former transmitter unit related register is described first transmitter unit related register, newly-increased to described second transmitter unit DDM monitoring related register.
9. the two light emitting module of SFF of band DDM function according to claim 8, it is characterized in that, this optical module adopts 2 × 10 pinouts, wherein the 6 to the 15 pin comprise two transmitter units power supply, differential signal input and enable control, distribute arbitrarily two as I in pin 1 ~ 5 or pin 16 ~ 20
2c bus communication pin.
10. an optical communication system, is characterized in that, comprise optical communication equipment and the two light emitting module of the SFF described in any one of claim 1-9, described optical communication equipment is connected with the two light emitting module of SFF described at least one.
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| CN112448764A (en) * | 2019-09-02 | 2021-03-05 | 武汉永鼎光通科技有限公司 | Optical module with DDM (distributed data management) reporting function for 5G (third generation) fronthaul network |
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Address after: High tech Zone Gaopeng road in Chengdu city of Sichuan Province in 610213 21 1 4 floor Applicant after: Eoptolink Technology Inc., Ltd. Address before: 610213 Sichuan city of Chengdu province Shuangliu County Xing Zhen Wu Lian Street No. 127 Applicant before: Eoptolink Technology Inc., Ltd. |
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Application publication date: 20150107 |
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