CN202178766U - Low-power dissipation optical module - Google Patents

Abstract

The utility model relates to the field of optical fiber communication and discloses a low-power dissipation optical module; the module realizes a low-power dissipation self-adaptive power control scheme by a control circuit; and the scheme can realize self-adaptive power control of a laser. Simultaneously, functions of enabling control and alarm output can be obtained by the scheme, and select range of a laser driving chip is also expanded, thereby selecting the chip with lower power dissipation. The optical module of the utility model can reduce more than 50 milliamperes of total current compared with the conventional schemes of modules of this kind. As the total power dissipation is reduced obviously, the low-power dissipation optical module is especially applicable to environment with relatively strict demand on power dissipation, such as a power system, etc.

Description

A kind of optical module of low-power consumption

Technical field

The utility model relates to fiber optic communication field, especially a kind of optical module of low-power consumption.

Background technology

In the prior art; A lot of optical modules all adopt integrated chip to realize functions such as the driving of laser, enable signal, alarm signal, adaptive power control; Though integrated chip has brought a lot of conveniences; But some special applied environments are arranged, and functional requirement is simple, but module dissipation is required very strict.The very high laser-driven chip of functional integration in this time can increase some unnecessary power consumptions, can not be strict satisfy the power consumption requirement.Such as in systems such as electric power, the optical module closeness is than higher, if module dissipation is excessive, caloric value is just many, in case cooling system is bad or when losing efficacy, system just breaks down easily.Optical module scheme sketch map of the prior art as shown in Figure 1; Its control circuit comprises that light emission interface assembly, integrated laser drive chip, interface circuit, amplitude limit amplifying unit, receiving interface of optical assembly; Above-mentioned smooth emission interface assembly drives chip through integrated laser and is connected with interface circuit; Above-mentioned receiving interface of optical assembly is through amplitude limit amplifying unit connecting interface circuit; Above-mentioned integrated laser drive chip integrated functions such as the driving of laser, enable signal, alarm signal, adaptive power control, adopt laser-driven chip to realize the driving of laser, enable signal, alarm signal, adaptive power control etc.

The utility model content

In specific application environment, can not satisfy the problem that power consumption requires to scheme of the prior art, the utility model provides a kind of optical module of low-power consumption.

The utility model discloses a kind of optical module of low-power consumption; Comprise interface circuit, laser-driven chip, light emission interface assembly, control circuit; Said interface circuit connects chip for driving, light emission interface assembly, control circuit in regular turn, and said smooth emission interface assembly comprises laser.

Preferably, above-mentioned control circuit comprises first discharge circuit.

Preferably, the above-mentioned optical module of stating comprises first negative circuit, and said interface circuit connects control circuit through first negative circuit.

Preferably, above-mentioned optical module comprises second discharge circuit and second negative circuit, and said second discharge circuit connects second negative circuit.

To sum up above-mentioned; Owing to adopted technique scheme, the utlity model has following beneficial effect: at optical module outer setting control circuit, the chip for driving in the utility model only needs the chip that can realize fundamental laser light device driving function just passable; Need not realize other function; Like adaptive power control etc., its function singleness of such basic chips, its power consumption obviously reduces.Realize adaptive power control at the peripheral control circuit that increases of its optical module, the power consumption of control circuit own is very little.Through repeatedly test; Index is compared with the essentially identical optical module of function in the low-power consumption optical module that uses the utility model and the prior art; Can reduce the total current more than 20 milliamperes; Its overall power consumption obviously reduces, and is particularly suitable for applying to like electric power system etc. power consumption being required relatively to increase the stability of system in the rigorous environment.

Description of drawings

The utility model will explain through example and with reference to the mode of accompanying drawing, wherein:

Fig. 1 is an optical module control circuit sketch map of the prior art.

Fig. 2 is the optical module control circuit sketch map of the utility model.

Fig. 3 is wherein a kind of concrete implementation structure of the control circuit of the utility model.

Fig. 4 is wherein a kind of concrete implementation structure of the circuit structure of realization enable signal.

Fig. 5 is wherein a kind of concrete implementation structure of the circuit structure of realization alarm signal.

Embodiment

Disclosed all characteristics in this specification, or the step in disclosed all methods or the process except mutually exclusive characteristic and/or the step, all can make up by any way.

Disclosed arbitrary characteristic in this specification (comprising any accessory claim, summary and accompanying drawing) is only if special narration all can or have similar purpose alternative features by other equivalence and replace.That is, only if special narration, each characteristic is an example in a series of equivalences or the similar characteristics.

The control circuit sketch map of the optical module of the utility model as shown in Figure 2; Comprise interface circuit, laser-driven chip, light emission interface assembly, control circuit; Said interface circuit connects chip for driving, light emission interface assembly, control circuit in regular turn; Said smooth emission interface assembly comprises laser, and said control circuit is used for going out according to laser the bias current of the variation control laser of luminous power.Fig. 3 is wherein a kind of concrete implementation structure of the control circuit of the utility model: it comprises interface circuit, laser-driven chip, light emission interface assembly, first discharge circuit, first triode, first magnetic bead, second magnetic bead, first resistance, second resistance; Above-mentioned smooth emission interface assembly is connected with interface circuit through laser-driven chip; Above-mentioned smooth emission interface assembly comprises laser; Above-mentioned laser connects first discharge circuit; The output of above-mentioned first discharge circuit connects the base stage of first triode through second resistance, and the emitter grounding of above-mentioned first triode, the collector electrode of above-mentioned first triode connect the negative pole of laser through first magnetic bead; The positive pole of above-mentioned laser is through the second magnetic bead connected system power supply, and above-mentioned laser detects the pin of luminous intensity through first grounding through resistance.Make first triode always work in magnifying state through the resistance of regulating second resistance.The chip for driving of the utility model only needs one, and to realize that the fundamental laser light device drives the chip of function just passable, need not realize other control, like adaptive power control etc., and its function singleness of such basic chips, its power consumption obviously reduces.Realize adaptive power control at the peripheral control circuit that increases of its optical module, the power consumption of control circuit own is very little.Through repeatedly test; Use the optical module control circuit of the utility model to compare with similar optical module of the prior art; Can reduce the total current more than 20 milliamperes; Its overall power consumption obviously reduces, and is particularly suitable for applying to like electric power system etc. power consumption being required relatively to increase the stability of system in the rigorous environment.Optical module in the utility model also comprises the receiving interface of optical assembly, and the structure of receiving interface of optical assembly is the same with structure of the prior art with connected mode, repeats no more at this.

The photodiode pin of the negative pole of the above-mentioned first discharge circuit input and laser is connected, and the positive pole of the above-mentioned first discharge circuit input connects reference voltage.Because the photodiode pin of laser (PD pin) is through first grounding through resistance; The electric current of laser PD pin can change with the Output optical power with laser; On the PD pin, form one with the relevant voltage of laser Output optical power (increase of laser Output optical power, the voltage increase on the PD pin through first grounding through resistance; The laser Output optical power reduces, and the voltage on the PD pin reduces; ).When laser power increases; Voltage on the corresponding PD increases, and the difference of PD and reference voltage is with regard to corresponding minimizing, so the amplifier output voltage will reduce; And the base voltage of corresponding first triode will diminish; This will cause the bias current that first triode flows through to reduce, and the bias current minimizing just means that laser power reduces, thereby has realized suppressing the effect that power increases.When laser power reduces; Voltage on the corresponding PD reduces, and the difference of PD and reference voltage is with regard to corresponding increase, so the voltage of amplifier output will increase; And the base voltage of corresponding first triode can increase; This bias current that will cause first triode to flow through increases, and the bias current increase just means that laser power can increase, thereby has realized suppressing the effect of power reduction.

Preferably, the control circuit of above-mentioned optical module comprises first negative circuit, and above-mentioned interface circuit connects the base stage of first triode through first negative circuit.Turn-off the lighting function of optical module when being implemented in the host computer input high level, realize the enable signal transmission of optical module through first negative circuit.

Preferably, Fig. 4 is wherein a kind of concrete implementation structure of the circuit structure of realization enable signal.Above-mentioned first negative circuit comprises the 3rd resistance, the 4th resistance, the 5th resistance, second triode; Above-mentioned the 3rd resistance connected system power supply; Above-mentioned the 4th resistance connects the base stage of the 3rd resistance, second triode; Above-mentioned the 4th resistance passes through the 5th grounding through resistance, the emitter grounding of above-mentioned second triode, and the collector electrode of above-mentioned second triode connects the base stage of first triode.The enable signal of host computer is transferred to the 4th resistance, is implemented in through the resistance of regulating above-mentioned resistance to enable in the low level scope, and second triode ends, and second triode still ends when promptly guaranteeing the highest low-level enable signal.When second triode ended, the collector electrode that is equivalent to it was unsettled, and first transistor base is not impacted, and optical module is normally luminous.Regulate resistance and also can be implemented in the assurance second triode conducting in the enable signal high level scope; Be that minimum high level enable signal also can conducting second triode; In the time of the second triode conducting, first transistor base is set to zero level, and promptly bias current breaks off; Therefore laser is turned off, and is not luminous.

Preferably, Fig. 5 is wherein a kind of concrete implementation structure of the circuit structure of realization alarm signal.The control circuit of above-mentioned optical module comprises second discharge circuit and second negative circuit, and above-mentioned second discharge circuit connects second negative circuit.Said second negater circuit is realized through the 3rd triode.When being implemented in the optical module operate as normal through second discharge circuit; Second discharge circuit output high level, promptly the level of output can make the second negative circuit conducting, at this moment; The alarm signal that the host computer interface receives is exactly a low level, is in normal luminance with regard to representation module.Receive the negative pole of amplifier after through the divider resistance regulation voltage with the reference voltage VREF of system; The PD pin is received the positive pole of amplifier, through regulating the voltage of amplifier negative pole, makes in the normal light emitting region of module; Amplifier output high level, promptly the level of output can make the conducting of anti-phase triode.At this moment, the Fault signal that the host computer interface can receive is exactly a low level, is in normal luminance with regard to representation module.

Preferably, above-mentioned first discharge circuit and second discharge circuit are integrated in the chip of a double operational, reduce power consumption to greatest extent, improve the integration of circuit.

Preferably, above-mentioned first negative circuit and second negative circuit are integrated in the double-triode valve chip, also reduce power consumption to greatest extent, improve the integration of circuit.

The invention also discloses a kind of scheme of optical module; It specifically comprises following steps: when the laser Output optical power changed, the voltage on its photodiode pin is respective change also, and its photodiode pin connects the negative pole of the first discharge circuit input; The positive pole of the first discharge circuit input connects reference voltage; The difference of discharge circuit both positive and negative polarity voltage changes along with the variation of laser Output optical power, and correspondingly, the voltage of first transistor base is also corresponding to change; Thereby the bias current that flows through first magnetic bead changes, and influences the Output optical power of laser.

Preferably, when above-mentioned laser Output optical power increased, bias current reduced, thereby realized suppressing the effect that the laser Output optical power increases.

Preferably, when above-mentioned laser Output optical power reduced, bias current increased, thereby realized printing the effect that the laser Output optical power reduces.

The utility model is not limited to aforesaid embodiment.The utility model expands to any new feature or any new combination that discloses in this manual, and the arbitrary new method that discloses or step or any new combination of process.

Claims (4)

1. the optical module of a low-power consumption; It is characterized in that comprising interface circuit, laser-driven chip, light emission interface assembly, control circuit; Said interface circuit connects chip for driving, light emission interface assembly, control circuit in regular turn, and said smooth emission interface assembly comprises laser.

2. optical module as claimed in claim 1 is characterized in that said control circuit comprises first discharge circuit.

3. optical module as claimed in claim 1 is characterized in that said optical module comprises first negative circuit, and said interface circuit connects control circuit through first negative circuit.

4. optical module as claimed in claim 1 is characterized in that said optical module comprises second discharge circuit and second negative circuit, and said second discharge circuit connects second negative circuit.

Images