CN106341189B - Optical module - Google Patents
Optical module Download PDFInfo
- Publication number
- CN106341189B CN106341189B CN201610822494.0A CN201610822494A CN106341189B CN 106341189 B CN106341189 B CN 106341189B CN 201610822494 A CN201610822494 A CN 201610822494A CN 106341189 B CN106341189 B CN 106341189B
- Authority
- CN
- China
- Prior art keywords
- signal
- voltage
- circuit
- output end
- analogue amplifier
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/40—Transceivers
Abstract
The present invention relates to technical field of photo communication, specifically, being related to a kind of optical module comprising have: photodetector, analogue amplifier, sample circuit and voltage-controlled attenuator；The analogue amplifier, signal input part are electrically connected the signal output end of the photodetector, the electric signal exported for amplifying the photodetector；The sample circuit, is electrically connected the second signal output end of the analogue amplifier, the level magnitude exported for sampling the analogue amplifier；The voltage-controlled attenuator is connected electrically between the signal input part of the analogue amplifier and the first signal output end as feed circuit, and its voltage controling end is electrically connected the output end of the sample circuit；Sampled voltage for being exported according to the sample circuit adjusts the level magnitude that the analogue amplifier is exported.Realize the accurate automatic control of the level magnitude exported to analogue amplifier, and without chips such as single-chip microcontrollers, it is at low cost.
Description
[technical field]
The present invention relates to technical field of photo communication, specifically, being related to a kind of optical module.
[background technique]
Optical module is a kind of optical active devices for realizing optical-electronic conversion and electrical-optical conversion, is the weight of optical communication equipment
Want functional module.In optical module communication system, it has been generally integrated radiofrequency signal amplification module, and radiofrequency signal is compared to number
Signal is more sensitive, understands the optical power size that receive with optical module and changes.When optical power change 1dB, the width of radiofrequency signal
It is even more that degree can change 2dB；And the environment reasons such as distance, quality of optical fiber wiring of transmission range all can influence optical module most
The optical power that terminating receives also reduces entire so that the output level amplitude fluctuations that will lead to radiofrequency signal amplification module are big
The stability of optical module communication system.
And existing optical module realizes the level magnitude exported to radiofrequency signal amplification module using power samples chip
Automatic control, after being sampled by the level magnitude that power samples chip exports radiofrequency signal amplification module, then will
The level magnitude is input to single-chip microcontroller, realizes the electricity exported to radiofrequency signal amplification module by single-chip microcontroller control digital pad
The automatic stabilisation of open width value.But the prior art samples level magnitude using power samples chip, vulnerable to telecommunication circuit
Interference so that the level magnitude that is sampled mutates；And there are steppings for used digital pad, cannot achieve to letter
Number continuous control, influence control precision；And power samples chip, single-chip microcontroller and digital pad used in the prior art
It will increase the cost of entire optical module.
[summary of the invention]
The purpose of the present invention aim to solve the problem that radiofrequency signal amplification module is exported in existing optical module level magnitude into
When row automatically controls, there is a problem of being unable to continuous control and lead to control accuracy difference and at high cost, a kind of optical module is provided.
To realize the purpose, the present invention adopts the following technical scheme:
The present invention provides a kind of optical modules comprising has: photodetector, analogue amplifier, sample circuit and voltage-controlled declining
Subtract device；
The sample circuit is electrically connected the second signal output end of the analogue amplifier, for sampling the Simulation scale-up
The level magnitude that device is exported；
The voltage-controlled attenuator is connected electrically in the signal input part and the first letter of the analogue amplifier as feed circuit
Between number output end, and its voltage controling end is electrically connected the output end of the sample circuit；For defeated according to sample circuit institute
Sampled voltage out adjusts the level magnitude that the analogue amplifier is exported.
Compared with prior art, the present invention has following advantage:
One of this programme optical module, includes optical detector, analogue amplifier, sample circuit and voltage-controlled attenuator,
Wherein the signal input part of analogue amplifier is electrically connected the signal output end of the optical detector, for amplifying the optical detector institute
The electric signal of output；Sample circuit is electrically connected the second signal output end of the analogue amplifier, for sampling the Simulation scale-up
The level magnitude that device is exported；And voltage-controlled attenuator is connected electrically in the signal input part of the analogue amplifier as feed circuit
Between the first signal output end, and its voltage controling end is electrically connected the output end of the sample circuit；For according to the sampling
The sampled voltage that circuit is exported controls the impedance of diode in the voltage-controlled attenuator, and then changes analogue amplifier both ends
Feedback parameter, i.e., the gain amplifier multiple of changeable analogue amplifier, the level exported so as to adjust the analogue amplifier
Amplitude.Realize the accurate automatic control of level magnitude exported to analogue amplifier, and without chips such as single-chip microcontrollers, at
This is low.
The additional aspect of the present invention and advantage will be set forth in part in the description, these will become from the following description
It obtains obviously, or recognized by the embodiment of this programme.
[Detailed description of the invention]
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to embodiment or description of the prior art
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only some realities of the invention
Apply example, however, the present invention is not limited thereto.
Fig. 1 is the structural schematic diagram in a kind of one embodiment of optical module of the present invention.
[specific embodiment]
The present invention is further described with exemplary embodiment with reference to the accompanying drawing, the examples of the embodiments are attached
It is shown in figure, in which the same or similar labels are throughly indicated same or similar element or there is same or like function
Element.The embodiments described below with reference to the accompanying drawings are exemplary, for explaining only the invention, and cannot be construed to pair
Limitation of the invention.In addition, if the detailed description of known technology is for showing the invention is characterized in that unnecessary, then by it
It omits.
Those skilled in the art of the present technique are appreciated that unless expressly stated, singular " one " used herein, " one
It is a ", " described " and "the" may also comprise plural form.It is to be further understood that being arranged used in specification of the invention
Diction " comprising " refer to that there are the feature, integer, step, operation, element and/or component, but it is not excluded that in the presence of or addition
Other one or more features, integer, step, operation, element, component and/or their group.It should be understood that when we claim member
Part is " connected " or when " coupled " to another element, it can be directly connected or coupled to other elements, or there may also be
Intermediary element.In addition, " connection " used herein or " coupling " may include being wirelessly connected or wirelessly coupling.It is used herein to arrange
Diction "and/or" includes one or more associated wholes for listing item or any cell and all combinations.
Those skilled in the art of the present technique are appreciated that unless otherwise defined, all terms used herein (including technology art
Language and scientific term), there is meaning identical with the general understanding of those of ordinary skill in fields of the present invention.Should also
Understand, those terms such as defined in the general dictionary, it should be understood that have in the context of the prior art
The consistent meaning of meaning, and unless idealization or meaning too formal otherwise will not be used by specific definitions as here
To explain.
The specific embodiment of this programme is detailed below.
It is a kind of optical module described in this programme, which includes to be electrically connected to each other specifically, referring to attached drawing 1
Photodetector 10 and analogue amplifier 20, wherein photodetector 10 is used to the optical signal received being converted into electric signal, then
The signal input part that the electric signal is input to analogue amplifier 20 is amplified into processing.In one embodiment of this programme,
The photodetector 10 can be PIN photodiode or avalanche photodide APD.
It should be noted that the optical signal received is converted into telecommunications by optical detector 10 in optical module communication system
Number, electric signal is then input to signal amplification module.And after optical detector 10 receives optical signal, which can be converted
At digital electric signal or analog electrical signal, wherein digital electric signal only has 0 and 1 two kind of signal level, then signal amplification module and
Subsequent receiving end only needs to judge the low and high level of digital electric signal, so that it may the errorless decoding digital electric signal；And
Analog electrical signal is more sensitive compared to digital electric signal, and is consecutive variations, and different signal amplitudes carries different letters
Breath, therefore the amplitude variation of the accurate recovering signal in receiving end is just very crucial for correctly decoding.And in same mould
Under quasi- electric signal modulation amplitude, carrier wave light intensity changes the level magnitudes that will affect final output, so as to cause erroneous judgement.Therefore, right
For the optical module of transmission analog electrical signal, keeps the level magnitudes under different carrier wave light intensity to stablize, be required requirement, phase
That answers is high to the analogue amplifier of electrical connection optical detector 10 and subsequent sample circuit requirement.
Specifically, the analogue amplifier 20 includes first order amplifying circuit B1 in one embodiment of this programme
With second level amplifying circuit B2, wherein the optical detector 10 be electrically connected first order amplifying circuit B1 signal input part IN1,
The signal output end OUT1 of first order amplifying circuit B1 accesses the signal input part IN2 of second level amplifying circuit B2, wherein
The signal output end OUT1 of the first order amplifying circuit B1 is the first signal output end, the letter of the second level amplifying circuit B2
Number output end OUT2 is second signal output end.And the simulation electricity that the analogue amplifier 20 is used to export optical detector 10
Signal realizes amplification.
Further, the output signal of the analogue amplifier 20 of the optical module only has tens dB microvolts under normal conditions, needs
The sample circuit that precision is higher and sampling is stable is used to sample 20 output level amplitudes of the analogue amplifier.At this
Further include the sample circuit 30 for having the second signal output end OUT2 for being electrically connected the analogue amplifier 20 in scheme, for pair
The level magnitude that the analogue amplifier 20 is exported is sampled.Specifically, in one embodiment of this programme, the sampling
Circuit 30 be mean value detecting circuit, due to mean value detecting circuit sampling output be a period of time mean value, export it is more stable,
Can to avoid due to caused by sampling momentary fluctuation or external disturbance to the unnecessary adjustment of 20 gain of analogue amplifier, thus
Guarantee the stabilization of 20 output amplitudes of analogue amplifier.
Specifically, the sample circuit 30 includes the first order being sequentially connected electrically in one embodiment of this programme
Operational amplifier circuit A1 and second level operational amplifier circuit A2, wherein diode of the output end of the first order operational amplifier circuit A1 by concatenation
The positive input terminal of D2 and resistance R6 electrical connection second level operational amplifier circuit A2, and the anode of diode D2 is electrically connected by resistance R2
The positive input terminal of the first order operational amplifier circuit A1.The negative input end of the first order operational amplifier circuit A1 is grounded by resistance R5,
The negative input end of the second level operational amplifier circuit A2 is grounded by resistance R7.The second signal output end of the analogue amplifier 20
OUT2 is electrically connected the positive input terminal of first order operational amplifier circuit A1 by the resistance R4 concatenated, and second signal output end OUT2 passes through
The resistance R1 of concatenation is electrically connected the positive input terminal of second level operational amplifier circuit A2；And the positive input terminal of first order operational amplifier circuit A1
Bridging has diode D1 between output end, there is in parallel bridging between the positive input terminal and output end of second level operational amplifier circuit A2
Resistance R3 and capacitor C1.
Further, optical module described in this programme further includes having operational amplifier 40 and voltage-controlled attenuator 50.It is wherein described
Operational amplifier 40 is electrically connected the output end of the sample circuit 30 and the voltage controling end of the voltage-controlled attenuator 50 (2 in figure
Foot, 4 feet and 5 feet) between, the sampled voltage that is exported for amplifying the sample circuit 30；The voltage-controlled attenuator 50, as anti-
Current feed circuit is connected electrically between the signal input part of the analogue amplifier 20 and the first signal output end OUT1, and its voltage control
End (2 feet, 4 feet and 5 feet in figure) processed is electrically connected the output end of the sample circuit 30；For being exported according to the sample circuit 30
Sampled voltage, adjust the level magnitude that the analogue amplifier 20 is exported.
Since the sampled voltage that sample circuit 30 exports is smaller, the voltage for controlling voltage-controlled attenuator 50 is bigger, therefore
In one embodiment of this programme, need to do ratio enlargement using operational amplifier 40.Specifically, the sampling of sample circuit 30
Voltage input is to the input terminal IN of operational amplifier 40, and sampled voltage is compared with reference voltage VREF in operational amplifier 40
Compared with generation control signal DRIVER is input to the voltage controling end (2 foot in figure) of voltage-controlled attenuator 50, and generates control signal
SHUNT is input to the voltage controling end (4 feet and 5 feet in figure) of voltage-controlled attenuator 50；Wherein the control signal SHUNT passes through electricity
Resistance R11 connects 4 feet of the voltage-controlled attenuator 50, and the control signal SHUNT passes through the resistance R12 connection voltage-controlled attenuator
50 5 feet.
Further, in one embodiment of this programme, the voltage-controlled voltage output end of the voltage-controlled attenuator 50 is (in figure
1 foot and 3 feet) it is connected electrically between the signal input part IN1 and signal output end OUT1 of first order amplifying circuit B1.
Specifically, when the level magnitude that sample circuit 30 detects that analogue amplifier 20 is exported increases, output
Sampled voltage also increases immediately, after doing ratio enlargement by operational amplifier 40, is added to the voltage controling end 2 of voltage-controlled attenuator 50
The voltage of foot also increases, which is added on the diode in voltage-controlled attenuator 50, thus change diode by electric current, benefit
With diode backward impedance with the characteristic of curent change, so that voltage-controlled voltage output end (1 foot in figure of voltage-controlled attenuator 50
And 3 feet) between impedance reduce, i.e., feed back to signal input part from the first signal output end OUT1 of first order amplifying circuit B1
The signal amplitude of IN1 just increases, according to the working principle of reversed feedback amplifier, the level width that analogue amplifier 20 exports at this time
Value can become smaller, to realize the automatic control to 20 output level amplitudes of analogue amplifier.Conversely, when sample circuit 30 is examined
When measuring the level magnitude reduction that analogue amplifier 20 is exported, the sampled voltage of output also reduces immediately, is put by operation
After big device 40 does ratio enlargement, the voltage for being added to 2 foot of voltage controling end of voltage-controlled attenuator 50 also reduces, voltage-controlled attenuator 50
Impedance between voltage-controlled voltage output end (1 foot and 3 feet in figure) increases, i.e., exports from the first signal of first order amplifying circuit B1
End OUT1 feeds back to the signal amplitude of signal input part IN1 and is reduced by, according to the working principle of reversed feedback amplifier, mould at this time
The level magnitude that quasi- amplifier 20 exports will increase, to realize the automatic control to 20 output level amplitudes of the analogue amplifier
System achievees the purpose that the level magnitude for stablizing the analogue amplifier 20 output.
In conclusion one of this programme optical module, includes optical detector 10, analogue amplifier 20, sample circuit
30 and voltage-controlled attenuator 50, wherein the signal input part of analogue amplifier 20 is electrically connected the signal output of the optical detector 10
End, the electric signal exported for amplifying the optical detector 10；Sample circuit 30 is electrically connected the signal of the analogue amplifier 20
Output end, the level magnitude exported for sampling the analogue amplifier 20；And voltage-controlled attenuator 50 is electrically connected as feed circuit
It connects between the signal input part and signal output end of the analogue amplifier 20, and its voltage controling end is electrically connected the sampling
The output end of circuit 30；Sampled voltage for being exported according to the sample circuit 30 controls two poles in the voltage-controlled attenuator 50
The impedance of pipe, and then change the feedback parameter at 20 both ends of analogue amplifier, i.e., the gain amplifier times of changeable analogue amplifier 20
Number, the level magnitude exported so as to adjust the analogue amplifier 20.Realize the level width exported to analogue amplifier 20
The accurate automatic control of value, and without chips such as single-chip microcontrollers, it is at low cost.
In the instructions provided here, although the description of a large amount of detail.It is to be appreciated, however, that of the invention
Embodiment can practice without these specific details.In some embodiments, it is not been shown in detail well known
Methods, structures and technologies, so as not to obscure the understanding of this specification.
Although having been illustrated with some exemplary embodiments of the invention above, those skilled in the art will be managed
Solution, in the case where not departing from the principle of the present invention or spirit, can make a change these exemplary embodiments, of the invention
Range is defined by the claims and their equivalents.
Claims (7)
1. a kind of optical module, which is characterized in that include: photodetector, analogue amplifier, sample circuit, operational amplifier and
Voltage-controlled attenuator；
The analogue amplifier, signal input part are electrically connected the signal output end of the photodetector, for amplifying light inspection
Survey the electric signal that device is exported；The analogue amplifier includes first order amplifying circuit, the signal of the first order amplifying circuit
Output end is the first signal output end；
The sample circuit is electrically connected the second signal output end of the analogue amplifier, for sampling the analogue amplifier institute
The level magnitude of output；
The voltage-controlled attenuator is connected electrically in the letter of the first order amplifying circuit of the analogue amplifier as feed circuit
Number between input terminal and first signal output end, and its voltage controling end described in operational amplifier electrical connection by adopting
The output end of sample circuit；
The operational amplifier is for amplifying the sampled voltage that the sample circuit is exported；
The voltage-controlled attenuator is used for the sampled voltage exported according to the sample circuit, adjusts the analogue amplifier and is exported
Level magnitude.
2. optical module according to claim 1, it is characterised in that: the operational amplifier is used for the sampled voltage
It is compared with preset reference level to export difference control signal, wherein difference control signal voltage-controlled declines for adjusting this
Subtract the impedance of device.
3. optical module according to claim 1, it is characterised in that: the analogue amplifier, for amplifying the photodetector
The analog electrical signal exported.
4. optical module according to claim 1, it is characterised in that: the photodetector includes PIN photodiode or snow
Avalanche photo diode, for the optical signal received to be converted to analog electrical signal.
5. optical module according to claim 1, it is characterised in that: the sample circuit includes mean value detecting circuit.
6. optical module according to claim 5, it is characterised in that: the mean value detecting circuit includes to be sequentially connected electrically
First order operational amplifier circuit and second level operational amplifier circuit.
7. optical module according to claim 1, it is characterised in that: the analogue amplifier further includes second level amplification electricity
Road；The first order amplifying circuit and the second level amplifying circuit are sequentially connected electrically, the signal of the second level amplifying circuit
Output end is second signal output end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610822494.0A CN106341189B (en) | 2016-09-14 | 2016-09-14 | Optical module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610822494.0A CN106341189B (en) | 2016-09-14 | 2016-09-14 | Optical module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106341189A CN106341189A (en) | 2017-01-18 |
| CN106341189B true CN106341189B (en) | 2019-08-09 |
Family
ID=57839036
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610822494.0A Active CN106341189B (en) | 2016-09-14 | 2016-09-14 | Optical module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106341189B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108521305A (en) * | 2018-06-11 | 2018-09-11 | 广西电网有限责任公司柳州供电局 | Fiber-optic signal receiving circuit |
| CN109217929B (en) * | 2018-10-29 | 2020-06-05 | 中原工学院 | Superspeed all-optical communication system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201298848Y (en) * | 2008-11-11 | 2009-08-26 | 无锡雷华网络技术有限公司 | Broadband photoelectric conversion automatic gain control circuit structure |
| CN202364227U (en) * | 2011-12-16 | 2012-08-01 | 深圳市万和电子有限公司 | Optical receiving module |
| CN204349993U (en) * | 2014-12-05 | 2015-05-20 | 上海凌云天博光电科技有限公司 | A kind of light-operated gain control circuit and optical receiver |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6210212B2 (en) * | 2012-12-06 | 2017-10-11 | パナソニックＩｐマネジメント株式会社 | Light quantity measuring device and projection display device having the same |
-
2016
- 2016-09-14 CN CN201610822494.0A patent/CN106341189B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201298848Y (en) * | 2008-11-11 | 2009-08-26 | 无锡雷华网络技术有限公司 | Broadband photoelectric conversion automatic gain control circuit structure |
| CN202364227U (en) * | 2011-12-16 | 2012-08-01 | 深圳市万和电子有限公司 | Optical receiving module |
| CN204349993U (en) * | 2014-12-05 | 2015-05-20 | 上海凌云天博光电科技有限公司 | A kind of light-operated gain control circuit and optical receiver |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106341189A (en) | 2017-01-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9628195B2 (en) | Transimpedance amplifier (TIA) having an enlarged dynamic range and optical devices using the same | |
| CN102204125B (en) | Optical receiver with threshold voltage compensation | |
| US7912380B2 (en) | Optical receiver | |
| US9954622B2 (en) | Trans-impedance amplifier and optical receiver including the same | |
| CN101447830B (en) | Ethernet passive optical network (EPON) optical line terminal photoelectric module with digital supervision and reporting functions | |
| CN105684304A (en) | Trans-impedance amplifier circuit | |
| CN103067090A (en) | Receiving signal power reinforcing indicator used for optical device and application method | |
| CN107517080A (en) | A kind of luminous power detection method, device, equipment and optical module | |
| US8901475B1 (en) | Avalanche photodiode biasing system including a current mirror, voltage-to-current converter circuit, and a feedback path sensing an avalanche photodiode voltage | |
| US9638725B2 (en) | Optical receiver and light reception current monitoring method | |
| CN102778613A (en) | Performance index test method of PIN-FET (p-intrinsic-n field effect transistor) light receiving assembly | |
| CN106341189B (en) | Optical module | |
| CN105656548A (en) | Gigabit-capable passive optical network-optical line terminal (GPON-OLT) burst receive optical power based detection system and application method thereof | |
| US20170033867A1 (en) | Optical receiver signal strength indicator (rssi) circuit having a variable supply voltage filter impedance | |
| JPWO2013111286A1 (en) | Optical receiver, station side optical termination device, and received light level monitoring method | |
| CN102185647A (en) | Photo current monitoring device | |
| US20080080871A1 (en) | Slice level control | |
| CN204479965U (en) | A kind of power invariability system of laser instrument | |
| CN103297121A (en) | RSSI (received signal strength indicator) value curve fitting method and RSSI value curve fitting system | |
| KR101334369B1 (en) | Apd receiver of controlling the apd bias voltage by optical signal | |
| JP5273409B2 (en) | Optical receiver and light receiving current monitoring method | |
| CN102594448B (en) | Extinction ratio measurement device | |
| CN104980113A (en) | High-precision photocurrent monitoring circuit and preamplifier | |
| CN203554450U (en) | SFP+LRM optical module | |
| CN202026306U (en) | Photoelectric current monitoring circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |