CN109217935A - Preposition light amplification receiving unit - Google Patents
Preposition light amplification receiving unit Download PDFInfo
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- CN109217935A CN109217935A CN201811347714.4A CN201811347714A CN109217935A CN 109217935 A CN109217935 A CN 109217935A CN 201811347714 A CN201811347714 A CN 201811347714A CN 109217935 A CN109217935 A CN 109217935A
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- 230000003321 amplification Effects 0.000 title claims abstract description 32
- 238000003199 nucleic acid amplification method Methods 0.000 title claims abstract description 32
- 239000000835 fiber Substances 0.000 claims abstract description 105
- 230000003287 optical effect Effects 0.000 claims abstract description 103
- 238000001914 filtration Methods 0.000 claims abstract description 23
- 238000003466 welding Methods 0.000 claims abstract description 10
- 230000008878 coupling Effects 0.000 claims description 8
- 238000010168 coupling process Methods 0.000 claims description 8
- 238000005859 coupling reaction Methods 0.000 claims description 8
- 230000004044 response Effects 0.000 claims description 8
- 239000013307 optical fiber Substances 0.000 claims description 5
- 230000005611 electricity Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 2
- 230000010354 integration Effects 0.000 abstract description 4
- 238000001514 detection method Methods 0.000 description 7
- 238000004891 communication Methods 0.000 description 3
- 230000005622 photoelectricity Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
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
- H04B10/60—Receivers
- H04B10/66—Non-coherent receivers, e.g. using direct detection
-
- 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
- H04B10/29—Repeaters
- H04B10/291—Repeaters in which processing or amplification is carried out without conversion of the main signal from optical form
- H04B10/2912—Repeaters in which processing or amplification is carried out without conversion of the main signal from optical form characterised by the medium used for amplification or processing
-
- 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
- H04B10/60—Receivers
- H04B10/66—Non-coherent receivers, e.g. using direct detection
- H04B10/67—Optical arrangements in the receiver
- H04B10/671—Optical arrangements in the receiver for controlling the input optical signal
-
- 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
- H04B10/60—Receivers
- H04B10/66—Non-coherent receivers, e.g. using direct detection
- H04B10/69—Electrical arrangements in the receiver
- H04B10/691—Arrangements for optimizing the photodetector in the receiver
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Optical Communication System (AREA)
- Lasers (AREA)
- Optical Couplings Of Light Guides (AREA)
Abstract
The invention discloses a kind of preposition light amplification receiving units, including sequentially connected multimode fibre, tunable bandpass optical filtering device, variable optical attenuator, fiber amplifier and photoswitch；The welding of described multimode fibre one end couples spherical lens, and the other end is connect after drawing cone with tunable bandpass optical filtering device；The preposition light amplification receiving unit further includes photodetector and integrated control circuit, and the input terminal of the photodetector is connect with the output end of the fiber amplifier, and the output end of the photodetector is connect with the input terminal of the integrated control circuit；One output control terminal of the integrated control circuit is connect with the variable optical attenuator, another output control terminal is connect with an input terminal of the fiber amplifier；Third output control terminal connects the tunable bandpass optical filtering device.Responding range of the present invention greatly promotes, have the characteristics that good stability, high reliablity, it is compact-sized, convenient for the system integration.
Description
Technical field
The present invention relates to laser acquisition fields, in particular to a kind of preposition light amplification receiving unit.
Background technique
Currently, receiving channel is generally saturating using coupling in the systems such as laser ranging, laser radar, laser space communication
Mirror+spatial filter+photodetector configuration is easy since coupled lens and spatial filter are spatial optical elements
Occurs the problems such as loosening, offset under the adverse circumstances such as vibratory impulse, reliability is poor；In addition, for castering action distance, light
Electric explorer generallys use highly sensitive avalanche photodide, single-photon detector or with the preposition reception across resistance amplification
Component be easy to cause photodetector saturation even to damage very much under the conditions of short-range detecting since laser echo signal is too strong
It is bad, also result in the increase of short-range detecting blind area；And under the conditions of remote probe, it is sensitive due to being limited to photodetector itself
Degree, maximum operating range are also restricted.Which greatly limits the actual use efficiency of laser detection system, urgent need is ensuring
In the case where laser detection system high reliability, its response dynamics range is promoted.
Summary of the invention
The purpose of the present invention is to provide a kind of responding ranges to greatly promote, good, high reliablity, knot with stability
Structure is compact, preposition light amplification receiving unit convenient for the system integration.
Used technical solution is for the above-mentioned purpose:
A kind of preposition light amplification receiving unit is provided, including sequentially connected multimode fibre, tunable bandpass optical filtering device,
Variable optical attenuator, fiber amplifier and photoswitch；The welding of described multimode fibre one end couples spherical lens, and the other end draws cone
It is connect afterwards with tunable bandpass optical filtering device；
The preposition light amplification receiving unit further includes photodetector and integrated control circuit, the photodetector it is defeated
Enter end to connect with the output end of the fiber amplifier, the output end of the photodetector is defeated with the integrated control circuit
Enter end connection；One output control terminal of the integrated control circuit is connect with the variable optical attenuator, another output
Control terminal is connect with an input terminal of the fiber amplifier；The third output control terminal connection tunable band light passing filter
Wave device；
Input optical signal enters multimode fibre after drawing is bored by the spherical lens, enters back into the tunable band light passing filter
Wave device is filtered, and filters out the extra ambient noise in input optical signal；Enter the tunable optical through filtered optical signal
Attenuator is decayed, and carries out gain amplification by the fiber amplifier, and amplified optical signal is coupled into institute again
It states in photodetector, the photodetector converts optical signals to electric signal；
The integrated control circuit receives the electric signal exported from the photodetector, and according to input optical signal
Intensity size is adjusted, and the size of input optical signal is adjusted within the scope of the normal power of the photodetector response.
Above-mentioned technical proposal is connect, the spherical lens is hemispherical or elliposoidal structure.
Above-mentioned technical proposal is connect, the photodetector is PIN the or APD photodiode of fiber coupling formula, Huo Zhedan
Photon detector, photodetector monitors the size of fiber amplifier output light, and feeds back and arrive the integrated control circuit.
Above-mentioned technical proposal is connect, the photoswitch is MEMS type or magneto-optical or electro-optical type dimming switch.
Above-mentioned technical proposal is connect, the multimode fibre is large-numerical aperture multimode fibre, and core diameter is more than or equal to 50 μm, numerical value
Aperture be more than or equal to 0.12, one end couple with the centre of sphere of spherical lens, the other end carry out draw cone handle, and and single mode optical fiber into
Row welding.
Above-mentioned technical proposal is connect, the tunable bandpass optical filtering device is the tail-fiber type narrowband in 300~2000nm wave band
Optical filter is coupled on the variable optical attenuator by fused fiber splice mode.
Above-mentioned technical proposal is connect, the variable optical attenuator is MEMS type or magneto-optical in 300~2000nm wave band
Or one of electro-optical type adjustable optical attenuator is coupled on the fiber amplifier by fused fiber splice mode；
Above-mentioned technical proposal is connect, which includes receiving control circuit, driving temperature control circuit, adjustable attenuation electricity
Road, filter control circuit and main control circuit, the main control circuit pass through the reception control circuit and the photodetection
Device connection, connect by the driving temperature control circuit with the fiber amplifier, by the attenuation control circuit with it is described can
Optical attenuator connection is tuned, is also connect by the filter control circuit with the tunable bandpass optical filtering device；
Input optical signal enters multimode fibre after drawing is bored by the spherical lens, enters back into the tunable band light passing filter
Wave device, filter control circuit described in the master control circuit controls adjust the tunable bandpass optical filtering device central wavelength and
Bandwidth filters out the extra ambient noise in input optical signal；Through filtered optical signal enter the variable optical attenuator into
Row decaying, and gain amplification is carried out by the fiber amplifier, amplified optical signal is coupled into the photoelectricity again and visits
It surveys in device, the photodetector converts optical signals to electric signal；The reception control circuit is received to be visited from the photoelectricity
Survey device output electric signal, carry out low noise amplification, and to the photodetector carry out gain control, while with the master control
Circuit processed is communicated.
Connect above-mentioned technical proposal, the process of the integrated control circuit automatic adjustment are as follows:
If input optical signal is more than some strength, the main control circuit passes through the attenuation control circuit, institute respectively
It states driving temperature control circuit and the reception control circuit is combined adjusting, increase the decaying times of the variable optical attenuator
Number, reduces the gain amplifier of the fiber amplifier, while reducing the gain size of the photodetector, finally by input light
The size of signal is reduced within the scope of the normal power of the photodetector response；
If input optical signal is not up to some strength, the main control circuit pass through respectively the driving temperature control circuit with
The reception control circuit is combined adjusting, increases the increasing of the gain amplifier and the photodetector of the fiber amplifier
The size of input optical signal is finally promoted within the scope of the normal power of the photodetector response by beneficial size.
The beneficial effect comprise that: preposition light amplification receiving unit of the invention, the component use all -fiber light
Road design, uses one end welding to couple spherical lens, and the other end draws the large-numerical aperture multimode fibre of cone as scatter echo
Laser signal receivers, and to the tunable bandpass optical filtering device of tail-fiber type, tail-fiber type variable optical attenuator, fiber amplifier,
Tail-fiber type photodetector and tail-fiber type photoswitch carry out introduced details, and reliability and the environment for being obviously improved the component are suitable
Ying Xing, while tail-fiber type variable optical attenuator and fiber amplifier are adjusted by integrated control circuit dynamic combined, in conjunction with tail
Fine formula photoswitch, it is ensured that the performance number for being coupled into detection system detector is in its linear zone always, and responding range is big
It is big to be promoted, have the characteristics that good stability, high reliablity, it is compact-sized, be convenient for the system integration, can be widely applied to Laser Measuring
Away from laser detection systems such as, laser radar, laser space communications.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples, in attached drawing:
Fig. 1 is the structural schematic diagram of the preposition light amplification receiving unit of the embodiment of the present invention；
Fig. 2 is the specific structure and its connection relationship diagram of main control circuit of the embodiment of the present invention.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that described herein, specific examples are only used to explain the present invention, not
For limiting the present invention.
As shown in Figure 1, the preposition light amplification receiving unit 100 of the embodiment of the present invention, by taking the laser radar of 1550nm as an example,
Spherical lens 01 is coupled including one end welding, the other end draws the large-numerical aperture multimode fibre 02 of cone, tail-fiber type is tunable band logical
Optical filter 03, tail-fiber type variable optical attenuator 04, fiber amplifier 05, tail-fiber type photodetector 06, comprehensively control electricity
Road 07 and tail-fiber type photoswitch 08, tunable bandpass optical filtering device 03, variable optical attenuator 04, photodetector 06, light are opened
Closing 08 may be selected tail-fiber type, in which:
In one embodiment of the present of invention, spherical lens 01 can be hemispherical dome structure or elliposoidal structure, and K9 may be selected
Glass material, the spherical structure have the field angle of 180 degree, receive the scattering laser signal from space to the maximum extent, should
It is mainly used for the 1550nm scattering laser signal of reception space in embodiment, by welding mode by its centre of sphere focal point and 105 μ
M/125 μm of multimode fibre end face is coupled；
Large-numerical aperture multimode fibre 02 can be 105 μm/125 μm multimode fibres, and numerical aperture is more than or equal to 0.12, this hair
0.22 is selected in the bright embodiment, one end is coupled with the centre of sphere of spherical lens 01, the other end carry out draw cone processing, and with list
Mode fiber (such as SMF28e) carries out welding, compatible convenient for carrying out with mature fiber optic component and device on the market in this way, reduction use at
This；
Tunable bandpass optical filtering device 03 can be the tail-fiber type narrow-band optical filter in 300~2000nm wave band, bandwidth model
Enclosing can be several nm to tens nm.In this embodiment of the invention, wavelength regulation 1530~1565nm of range, bandwidth 10nm pass through
Fused fiber splice mode is coupled on tail-fiber type variable optical attenuator 04；
Variable optical attenuator 04 can be the MEMS type or magneto-optical or the adjustable light decay of electro-optical type in 300~2000nm wave band
Subtract one of device, by fused fiber splice mode, is coupled on fiber amplifier 05.Operation wavelength is in the embodiment
1550nm, attenuation range are 0~80dB, and Transistor-Transistor Logic level directly drives control；
Fiber amplifier 05 can be fiber amplifier or tail-fiber type semiconductor optical amplifier.In the embodiment of the invention
Low noise erbium-doped fiber amplifier is selected, low level signal amplification gain is connected to tail-fiber type light by fused fiber splice mode up to 50dB
On electric explorer 06；
Photodetector 06 can be PIN the or APD photodiode or single-photon detector of fiber coupling formula, mainly
For monitoring the size of 05 output light of fiber amplifier, and feeds back and arrive integrated control circuit 07.Optical fiber coupling is selected in the embodiment
Box-like PIN photodiode；
Integrated control circuit 07, by the monitoring signal of reception optical fiber manifold type PIN photodiode, dynamic combined is adjusted
Tail-fiber type variable optical attenuator 04 and fiber amplifier 05, it is ensured that be coupled into the performance number of tail-fiber type photoswitch 08, meet
System requirements；
Tail-fiber type photoswitch 08 can be the MEMS type or magneto-optical or electro-optical type dimming switch in 300~2000nm wave band
One of, by fused fiber splice mode, it is coupled on the detector of detection system.Selected in the present embodiment operation wavelength for
The magneto-optical photoswitch of 1550nm, switching speed are 50 μ s, and extinction ratio is coupled to detection by fused fiber splice mode up to 60dB
On the detector of system.
The course of work of the invention is as follows:
Scattering laser signal (end Input) from space, is coupled into large-numerical aperture multimode light through spherical lens 01
Fibre 02, is coupled into the tunable bandpass optical filtering device 03 of tail-fiber type by an area Duan Lazhui, which can effectively filter out more
Then remaining ambient noise is coupled into tail-fiber type variable optical attenuator 04, the attenuator in order to effectively ensure rear end detect
Device causes to be saturated or be damaged because power is excessively high, and pad value is set as 40dB in advance, is adjusted according to the watt level dynamic monitored below
Section: if to detect performance number excessively high for tail-fiber type photodetector, continue to increase attenuation, until meeting the input work of detector
Rate requirement, at this point, opening photoswitch, the detector end face of sizeable Coupling power to laser radar；If tail-fiber type
It is too low that photodetector detects performance number, reduces attenuation, if attenuation is adjusted to 0dB, optical signal still very little, at this time
Fiber amplifier is opened until exporting the performance number for meeting detector input requirements, at this point, photoswitch is opened again, it is sizeable
Coupling power is to the detector end face of laser radar.In this manner it is ensured that in laser radar system detector response dynamics
Range is 80dB+50dB, i.e. 130dB.And tail-fiber type photoswitch, it can farthest protect the detector of laser radar system
From power damage.
In another embodiment of the present invention, as shown in Fig. 2, the integrated control circuit 07 includes receiving control circuit 71, driving
Dynamic temperature control circuit 72, attenuation control circuit 73, filter control circuit 74 and main control circuit 75, the main control circuit 75 pass through
The reception control circuit 71 is connect with photodetector 06, is connected by the driving temperature control circuit 72 with fiber amplifier 05
It connects, is connect by the attenuation control circuit 74 with the variable optical attenuator 04, also pass through the filter control circuit 74
It is connect with tunable bandpass optical filtering device 03；
Input optical signal enters multimode fibre 02 after drawing is bored by the spherical lens 01, enters back into the tunable band logical
Optical filter 03, the main control circuit 75 control the filter control circuit 74 and adjust the tunable bandpass optical filtering device 03
Central wavelength and bandwidth, filter out the extra ambient noise in input optical signal；Enter through filtered optical signal described adjustable
Humorous optical attenuator 04 is decayed, and carries out gain amplification, amplified optical signal coupling again by the fiber amplifier 05
It closes and enters in the photodetector 06, the photodetector 06 converts optical signals to electric signal；The reception control electricity
Road 71 receives the electric signal exported from the photodetector 06, carries out low noise amplification, and to the photodetector 06
Gain control is carried out, while being communicated with the main control circuit 75.
In the embodiment, the process of the automatic adjustment of integrated control circuit 07 are as follows:
If input optical signal is more than some strength, the main control circuit 75 passes through the attenuation control circuit respectively
73, the driving temperature control circuit 74 is combined adjusting with the reception control circuit 71, increases the variable optical attenuator
04 attenuation multiple, reduces the gain amplifier of the fiber amplifier 05, while the gain for reducing the photodetector 06 is big
It is small, within the scope of the normal power for being finally reduced to the photodetector 06 to respond the size of input optical signal；
If input optical signal is not up to some strength, the main control circuit 75 passes through the driving temperature control circuit respectively
75 are combined adjusting with the reception control circuit 71, and the gain amplifier and the photoelectricity for increasing the fiber amplifier 06 are visited
The gain size for surveying device 06, is finally promoted to the normal power model that the photodetector 06 responds for the size of input optical signal
In enclosing.
To sum up, preposition light amplification receiving unit of the invention uses all -fiber light path design, and one end welding is used to couple
Spherical lens, the other end draw the large-numerical aperture multimode fibre of cone as scatter echo laser signal receivers, and to tail-fiber type
Tunable bandpass optical filtering device, tail-fiber type variable optical attenuator, fiber amplifier, tail-fiber type photodetector and tail-fiber type
Photoswitch carries out introduced details, has been obviously improved the reliability and environmental suitability of the component, while passing through integrated control circuit
Dynamic combined adjusts tail-fiber type variable optical attenuator and fiber amplifier, in conjunction with tail-fiber type photoswitch, it is ensured that be coupled into spy
The performance number of examining system detector is in its linear zone always, and responding range greatly promotes, the good, reliability with stability
The features such as high, compact-sized, convenient for the system integration, can be widely applied to laser ranging, laser radar, laser space communication etc. and swash
Optical detection system.
It should be understood that for those of ordinary skills, it can be modified or changed according to the above description,
And all these modifications and variations should all belong to the protection domain of appended claims of the present invention.
Claims (9)
1. a kind of preposition light amplification receiving unit, which is characterized in that filtered including sequentially connected multimode fibre, tunable band light passing
Wave device, variable optical attenuator, fiber amplifier and photoswitch；The welding of described multimode fibre one end couples spherical lens, another
End is connect after drawing cone with tunable bandpass optical filtering device；
The preposition light amplification receiving unit further includes photodetector and integrated control circuit, the input terminal of the photodetector
It is connect with the output end of the fiber amplifier, the input terminal of the output end of the photodetector and the integrated control circuit
Connection；One output control terminal of the integrated control circuit is connect with the variable optical attenuator, another output control
End is connect with an input terminal of the fiber amplifier；Third output control terminal connects the tunable bandpass optical filtering
Device；
Input optical signal enters multimode fibre after drawing is bored by the spherical lens, enters back into the tunable bandpass optical filtering device
It is filtered, filters out the extra ambient noise in input optical signal；Decay through filtered optical signal into the tunable optical
Device is decayed, and carries out gain amplification by the fiber amplifier, and amplified optical signal is coupled into the light again
In electric explorer, the photodetector converts optical signals to electric signal；
The integrated control circuit receives the electric signal exported from the photodetector, and the intensity according to input optical signal
Size is adjusted, and the size of input optical signal is adjusted within the scope of the normal power of the photodetector response.
2. preposition light amplification receiving unit according to claim 1, which is characterized in that the spherical lens be hemispherical or
Elliposoidal structure.
3. preposition light amplification receiving unit according to claim 1, which is characterized in that the photodetector is optical fiber coupling
Box-like PIN or APD photodiode or single-photon detector, photodetector monitor the big of fiber amplifier output light
It is small, and feed back and arrive the integrated control circuit.
4. preposition light amplification receiving unit according to claim 1, which is characterized in that the photoswitch is MEMS type, or
Magneto-optical or electro-optical type dimming switch.
5. preposition light amplification receiving unit according to claim 1, which is characterized in that the multimode fibre is big numerical aperture
Diameter multimode fibre, core diameter are more than or equal to 50 μm, and numerical aperture is more than or equal to 0.12, and one end is coupled with the centre of sphere of spherical lens,
The other end carries out drawing cone processing, and carries out welding with single mode optical fiber.
6. preposition light amplification receiving unit according to claim 1, which is characterized in that the tunable bandpass optical filtering device
The tunable light decay is coupled to by fused fiber splice mode for the tail-fiber type narrow-band optical filter in 300 ~ 2000nm wave band
Subtract on device.
7. preposition light amplification receiving unit according to claim 1, which is characterized in that the variable optical attenuator is
One of MEMS type or magneto-optical or electro-optical type adjustable optical attenuator in 300 ~ 2000nm wave band, by fused fiber splice side
Formula is coupled on the fiber amplifier.
8. preposition light amplification receiving unit described in any one of -7 according to claim 1, which is characterized in that comprehensively control electricity
Road includes receiving control circuit, driving temperature control circuit, attenuation control circuit, filter control circuit and main control circuit, the master
Control circuit is connect by the reception control circuit with the photodetector, and the driving temperature control circuit and the light are passed through
Fiber amplifier connection, is connect by the attenuation control circuit with the variable optical attenuator, is also controlled by the filtering
Circuit is connect with the tunable bandpass optical filtering device；
Input optical signal enters multimode fibre after drawing is bored by the spherical lens, enters back into the tunable bandpass optical filtering
Device, filter control circuit described in the master control circuit controls adjust the central wavelength and band of the tunable bandpass optical filtering device
Width filters out the extra ambient noise in input optical signal；It is carried out through filtered optical signal into the variable optical attenuator
Decaying, and gain amplification is carried out by the fiber amplifier, amplified optical signal is coupled into the photodetection again
In device, the photodetector converts optical signals to electric signal；The reception control circuit, which receives, comes from the photodetection
Device output electric signal, carry out low noise amplification, and to the photodetector carry out gain control, while with the main control
Circuit is communicated.
9. preposition light amplification receiving unit according to claim 8, which is characterized in that the integrated control circuit is adjusted automatically
The process of section are as follows:
If input optical signal is more than some strength, the main control circuit passes through the attenuation control circuit, the drive respectively
Dynamic temperature control circuit and the reception control circuit are combined adjusting, increase the attenuation multiple of the variable optical attenuator, drop
The gain amplifier of the low fiber amplifier, while the gain size of the photodetector is reduced, finally by input optical signal
Size be reduced within the scope of the normal power of photodetector response；
If input optical signal is not up to some strength, the main control circuit pass through respectively the driving temperature control circuit with it is described
It receives control circuit and is combined adjusting, the gain for increasing the gain amplifier and the photodetector of the fiber amplifier is big
It is small, finally the size of input optical signal is promoted within the scope of the normal power of the photodetector response.
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| CN201811347714.4A CN109217935A (en) | 2018-11-13 | 2018-11-13 | Preposition light amplification receiving unit |
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| CN201811347714.4A CN109217935A (en) | 2018-11-13 | 2018-11-13 | Preposition light amplification receiving unit |
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Cited By (4)
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| CN110048769A (en) * | 2019-04-29 | 2019-07-23 | 中国电子科技集团公司第四十一研究所 | A kind of adaptive frequency response function test device and method |
| CN110324088A (en) * | 2019-07-23 | 2019-10-11 | 成都市德科立菁锐光电子技术有限公司 | The amplification control method of optical module and optical signal with image intensifer |
| CN110806573A (en) * | 2019-12-13 | 2020-02-18 | 中国科学院长春光学精密机械与物理研究所 | Indoor distance measurement precision real-time measurement device for laser distance measuring machine |
| CN110880954A (en) * | 2019-11-29 | 2020-03-13 | 深圳市光为光通信科技有限公司 | Optical detector receiving assembly |
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| CN110048769A (en) * | 2019-04-29 | 2019-07-23 | 中国电子科技集团公司第四十一研究所 | A kind of adaptive frequency response function test device and method |
| CN110324088A (en) * | 2019-07-23 | 2019-10-11 | 成都市德科立菁锐光电子技术有限公司 | The amplification control method of optical module and optical signal with image intensifer |
| CN110880954A (en) * | 2019-11-29 | 2020-03-13 | 深圳市光为光通信科技有限公司 | Optical detector receiving assembly |
| CN110806573A (en) * | 2019-12-13 | 2020-02-18 | 中国科学院长春光学精密机械与物理研究所 | Indoor distance measurement precision real-time measurement device for laser distance measuring machine |
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