CN209030224U - A kind of preposition light amplification receiving unit - Google Patents
A kind of preposition light amplification receiving unit Download PDFInfo
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- CN209030224U CN209030224U CN201821871357.7U CN201821871357U CN209030224U CN 209030224 U CN209030224 U CN 209030224U CN 201821871357 U CN201821871357 U CN 201821871357U CN 209030224 U CN209030224 U CN 209030224U
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Abstract
The utility model 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.The utility model responding range greatly promotes, have the characteristics that good stability, high reliablity, it is compact-sized, convenient for the system integration.
Description
Technical field
The utility model 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.
Utility model content
The purpose of this utility model is to provide a kind of responding ranges to greatly promote, the good, reliability with stability
Preposition light amplification receiving unit high, compact-sized, 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.
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.
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.
The beneficial effect that the utility model generates is: the preposition light amplification receiving unit of the utility model, which uses
All -fiber light path design, uses one end welding to couple spherical lens, and the other end draws the large-numerical aperture multimode fibre conduct of cone
Scatter echo laser signal receivers, and to the tunable bandpass optical filtering device of tail-fiber type, tail-fiber type variable optical attenuator, optical fiber
Amplifier, tail-fiber type photodetector and tail-fiber type photoswitch carry out introduced details, have been obviously improved the reliability of the component
With environmental suitability；In addition, the spherical structure has biggish field angle, the scattering laser from space is received to large extent
Signal can be widely applied to the laser detection systems such as laser ranging, laser radar, laser space communication.
Detailed description of the invention
Below in conjunction with accompanying drawings and embodiments, the utility model is described in further detail, in attached drawing:
Fig. 1 is the structural schematic diagram of the preposition light amplification receiving unit of the utility model embodiment；
Fig. 2 is the specific structure and its connection relationship diagram of the utility model embodiment main control circuit.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only to explain this
Utility model is not used to limit the utility model.
As shown in Figure 1, the preposition light amplification receiving unit 100 of the utility model embodiment, with the laser radar of 1550nm
For, including one end welding coupling spherical lens 01, the large-numerical aperture multimode fibre 02 of other end drawing cone, tail-fiber type is tunable
Bandpass optical filtering device 03, tail-fiber type variable optical attenuator 04, fiber amplifier 05, tail-fiber type photodetector 06, comprehensive control
Circuit 07 and tail-fiber type photoswitch 08 processed, tunable bandpass optical filtering device 03, variable optical attenuator 04, photodetector 06,
Tail-fiber type may be selected in photoswitch 08, in which:
In one embodiment of the utility model, spherical lens 01 can be hemispherical dome structure or elliposoidal structure, it is optional
K9 glass material is selected, which has the field angle of 180 degree, receives the scattering laser letter from space to the maximum extent
Number, it is mainly used for the 1550nm scattering laser signal of reception space in the embodiment, by welding mode by its centre of sphere focal point
It is coupled with 105 μm/125 μm multimode fibre end faces；
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 reality
With selecting 0.22 in the novel embodiment, one end is coupled with the centre of sphere of spherical lens 01, and the other end carries out drawing cone processing, and
Welding is carried out with single mode optical fiber (such as SMF28e), compatible convenient for carrying out with the fiber optic component and device of maturation on the market in this way, reduction makes
Use cost；
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 the utility model embodiment, wavelength regulation 1530~1565nm of range, bandwidth 10nm,
By fused fiber splice mode, it 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.The implementation of the utility model
Low noise erbium-doped fiber amplifier is selected in example, low level signal amplification gain is connected to tail optical fiber by fused fiber splice mode up to 50dB
On formula photodetector 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 utility model 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 utility model, as shown in Fig. 2, the integrated control circuit 07 includes receiving control circuit
71, temperature control circuit 72, attenuation control circuit 73, filter control circuit 74 and main control circuit 75, the main control circuit are driven
75 are connect by the reception control circuit 71 with photodetector 06, and the driving temperature control circuit 72 and fiber amplifier are passed through
05 connection, is connect by the attenuation control circuit 74 with the variable optical attenuator 04, and filtering control electricity is also passed through
Road 74 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, the preposition light amplification receiving unit of the utility model uses all -fiber light path design, uses one end welding
Spherical lens is coupled, the other end draws the large-numerical aperture multimode fibre of cone as scatter echo laser signal receivers, and to tail
Fine formula is tunable bandpass optical filtering device, tail-fiber type variable optical attenuator, fiber amplifier, tail-fiber type photodetector and tail
Fine formula photoswitch carries out introduced details, has been obviously improved the reliability and environmental suitability of the component, while passing through comprehensively 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
The performance number for entering detection system detector is in its linear zone always, and responding range greatly promotes, have stability it is good, can
The features such as high, compact-sized by property, convenient for the system integration, it can be widely applied to laser ranging, laser radar, laser space communication
Etc. laser detection systems.
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 all should belong to the protection scope of the appended claims for the utility model.
Claims (8)
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.
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.
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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821871357.7U CN209030224U (en) | 2018-11-13 | 2018-11-13 | A kind of preposition light amplification receiving unit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821871357.7U CN209030224U (en) | 2018-11-13 | 2018-11-13 | A kind of preposition light amplification receiving unit |
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| CN209030224U true CN209030224U (en) | 2019-06-25 |
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| CN201821871357.7U Active CN209030224U (en) | 2018-11-13 | 2018-11-13 | A kind of preposition light amplification receiving unit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109217935A (en) * | 2018-11-13 | 2019-01-15 | 华中光电技术研究所（中国船舶重工集团有限公司第七七研究所） | Preposition light amplification receiving unit |
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2018
- 2018-11-13 CN CN201821871357.7U patent/CN209030224U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109217935A (en) * | 2018-11-13 | 2019-01-15 | 华中光电技术研究所（中国船舶重工集团有限公司第七七研究所） | Preposition light amplification receiving unit |
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Legal Events
| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 430223 No. 981 Xiongchu Street, Hongshan District, Wuhan City, Hubei Province Patentee after: Huazhong Optoelectronic Technology Research Institute (717 Research Institute of China Shipbuilding Corp.) Address before: 430223 No. 981 Xiongchu Street, Hongshan District, Wuhan City, Hubei Province Patentee before: HUAZHONG PHOTOELECTRIC TECHNOLOGY INSTITUTE (NO 717 Research Institute CSIC) |
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| CP01 | Change in the name or title of a patent holder | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230802 Address after: 2 # Scientific Research Building, No. 717, Yangguang Avenue, Jiangxia District, Wuhan City, Hubei Province 430000 Patentee after: Wuhan Huazhong Kuangteng Optical Technology Co.,Ltd. Address before: 430223 No. 981 Xiongchu Street, Hongshan District, Wuhan City, Hubei Province Patentee before: Huazhong Optoelectronic Technology Research Institute (717 Research Institute of China Shipbuilding Corp.) |
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| TR01 | Transfer of patent right |