CN107589427A - The device of laser radar reception signal amplification - Google Patents
The device of laser radar reception signal amplification Download PDFInfo
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- CN107589427A CN107589427A CN201710781175.4A CN201710781175A CN107589427A CN 107589427 A CN107589427 A CN 107589427A CN 201710781175 A CN201710781175 A CN 201710781175A CN 107589427 A CN107589427 A CN 107589427A
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- laser
- reception signal
- atomic bubble
- polarization
- laser radar
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Abstract
The invention discloses a kind of device of laser radar reception signal amplification,Including pump laser,Atom filter module,Photodetector,The atom filter module includes two polarization elements,Two permanent magnets and an atomic bubble,Described two permanent magnets are arranged on the both ends of atomic bubble,The centre of each permanent magnet is provided with the through hole for laser light,Metallic vapour is filled with the atomic bubble,Described two polarization elements are arranged on the outer end of two permanent magnets,The polarization direction of described two polarization elements is vertical,The appearance of the polarization element is provided with anti-reflection film,Optical signal input of one of them described polarization element for transmitting laser after target reflects,Another described polarization element is light signal output end,The photodetector is connected with light signal output end,The input direction of the input optical fibre coupler of the pump laser is directed at the side of the atomic bubble.The present invention can improve reception signal.
Description
Technical field
The present invention relates to the device of laser radar reception signal amplification.
Background technology
Laser radar is a kind of device that target object measurement is carried out using laser.Transmitting laser returns to through target object
The signal receiving part of laser radar system point, by detecting echo signal intensity or frequency information, realize empty to target object
Between distance or movement velocity measurement.Therefore, sensitivity of the detection efficient of receiving portion to laser radar system has important shadow
Ring.Detection efficient is improved, faint echo-signal can be measured, is advantageous to improve the detection range of laser radar.
At present, it is using the receiving portion technical scheme of laser radar system：It is spuious using interference filter element filter background
Light, retain target and return to optical information.Signal of the bandwidth of interference filter element typically in several nanometers, bandwidth range can be by
System detects.Although the background stray light of most of wave band can be filtered, this method still can be by veiling glare
Influence.On the other hand, optical filter is always to the lossy effect of reception signal.
The content of the invention
To overcome disadvantages mentioned above, it is an object of the invention to provide a kind of laser radar reception signal for improving reception signal
The device of amplification.
In order to reach object above, the technical solution adopted by the present invention is：A kind of dress of laser radar reception signal amplification
Put, including pump laser, atom filter module, photodetector, the atom filter module include two polarization elements,
Two permanent magnets and an atomic bubble, described two permanent magnets are arranged on the both ends of atomic bubble, in each permanent magnet
Between be provided with through hole for laser light, is filled with metallic vapour in the atomic bubble, described two polarization elements are arranged on
The outer end of two permanent magnets, the polarization direction of described two polarization elements is vertical, and the appearance of the polarization element is provided with
Anti-reflection film, one of them described polarization element are optical signal input of the transmitting laser after target reflects, described in another
Polarization element is light signal output end, and the photodetector is connected with light signal output end, the pump laser it is defeated
The input direction for entering fiber coupler is directed at the side of the atomic bubble.
The beneficial effect of the device of laser radar reception signal of the present invention amplification is, pump laser to by atom by base
State pumping is to excitation state, to realize the stimulated radiation amplification of light；Atom filter module is realizing the spectrum of laser signal
Filtering；Photodetector to Measurement atom filtration module output optical signal；Increase due to being coated with laser on polarization element
Permeable membrane, intensity of the laser by atom filter module, light transmittance are improved by laser anti-reflection film, the loss of laser is reduced, enters
And improve the intensity for the atom filter module output optical signal that photodetector detects.Launch laser after target reflects, return
It is back to echo reception part；During through atom filter module, due to the effect of pumping laser, atomic transition to excitation state, not only
Background stray light can be filtered out, echo-signal can also be amplified, echo laser can produce signal amplification, be advantageous to improve
The detection efficient of reception signal.
Preferably, the mixed inert gas of Krypton, xenon are filled with the atomic bubble, prevent atomic bubble from exploding.
Preferably, the atomic bubble is steeped using alkali metal atom.
Preferably, the permanent magnet uses field intensity as 8~13 Gauss downfield permanent magnets.
Preferably, temperature control component is provided with the atomic bubble, the temperature control component steeps alkali metal atom
Temperature control at 60~90 DEG C.
Preferably, the pump light of the pump laser enters the side of atomic bubble by quarter wave plate, high reflective mirror.
Brief description of the drawings
Fig. 1 is the structural representation of the present embodiment.
In figure：
1- pump lasers；2- atom filter modules；3- photodetectors；4- polarization elements；5- permanent magnets；6- atoms
Bubble；7- anti-reflection films；The high reflective mirrors of 8-；9-1/4 wave plates.
Embodiment
Presently preferred embodiments of the present invention is described in detail below in conjunction with the accompanying drawings, so that advantages and features of the invention energy
It is easier to be readily appreciated by one skilled in the art, apparent is clearly defined so as to be made to protection scope of the present invention.
Referring to shown in accompanying drawing 1, a kind of device of laser radar reception signal amplification of the present embodiment, including pump laser
1st, atom filter module 2, photodetector 3, atom filter module 2 is realizing the spectral filtering of laser signal, atom filter
Module 2 includes two polarization elements, 4, two permanent magnets 5 and an atomic bubble 6, two permanent magnets 5 are arranged on atomic bubble 6
Both ends, the centre of each permanent magnet 5 is provided with the through hole for laser light, metallic vapour, interior filling is filled with atomic bubble 6
There is the atomic bubble 6 of metallic vapour for alkali metal atom bubble 6, two polarization elements 4 are arranged on the outer end of two permanent magnets 5, and two
The polarization direction of individual polarization element 4 is vertical, and the appearance of polarization element 4 is provided with anti-reflection film 7, one of polarization element
4 be optical signal input of the transmitting laser after target reflects, and another polarization element is light signal output end, photodetection
Device 3 is connected with light signal output end, and photodetector 3 is to the output optical signal of Measurement atom filtration module, pump laser 1
Input optical fibre coupler input direction alignment atomic bubble 6 side, pump laser to by atom by ground state pumping extremely
Excitation state, to realize the stimulated radiation amplification of light.
In the present embodiment, in order to prevent atomic bubble from exploding, the mixed inert gas of promising Krypton, xenon is filled with atomic bubble 6
Body.
Wherein, temperature control component is provided with atomic bubble 6, temperature control component steeps alkali metal atom 6 temperature control
System is at 60~90 DEG C.
Permanent magnet 5 uses field intensity as 8~13 Gauss downfield permanent magnets 5.
The pump light of pump laser 1 enters the side of atomic bubble 6 by quarter wave plate 9, high reflective mirror 8.
The technical concepts and features of embodiment of above only to illustrate the invention, its object is to allow be familiar with technique
People understands present disclosure and is carried out, and it is not intended to limit the scope of the present invention, all according to spirit of the invention
The equivalent change or modification that essence is done, it should all cover within the scope of the present invention.
Claims (6)
- A kind of 1. device of laser radar reception signal amplification, it is characterised in that：Including pump laser (1), atom filter mould Block (2), photodetector (3), the atom filter module (2) include two polarization elements (4), two permanent magnets (5) with And an atomic bubble (6), described two permanent magnets (5) are arranged on the both ends of atomic bubble (6), in each permanent magnet (5) Between be provided with through hole for laser light, is filled with metallic vapour, described two polarization elements (4) in the atomic bubble (6) The outer end of two permanent magnets (5) is arranged on, the polarization direction of described two polarization elements (4) is vertical, the polarization element (4) appearance is provided with anti-reflection film (7), light of one of them described polarization element (4) for transmitting laser after target reflects Signal input part, another described polarization element are light signal output end, the photodetector (3) and light signal output end Connection, the input direction of the input optical fibre coupler of the pump laser (1) are directed at the side of the atomic bubble (6).
- 2. the device of laser radar reception signal amplification according to claim 1, it is characterised in that：The atomic bubble (6) Inside it is filled with the mixed inert gas of promising Krypton, xenon.
- 3. the device of laser radar reception signal amplification according to claim 1, it is characterised in that：It is interior to be filled with metal steam The atomic bubble (6) of vapour is that alkali metal atom steeps (6).
- 4. the device of laser radar reception signal amplification according to claim 3, it is characterised in that：The atomic bubble (6) Temperature control component is inside provided with, alkali metal atom is steeped the temperature control of (6) at 60~90 DEG C by the temperature control component.
- 5. the device of laser radar reception signal amplification according to claim 1, it is characterised in that：The permanent magnet (5) Field intensity is used as 8~13 Gauss downfield permanent magnets (5).
- 6. the device of laser radar reception signal amplification according to claim 1, it is characterised in that：The pump laser (1) pump light enters the side of atomic bubble (6) by quarter wave plate (9), high reflective mirror (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710781175.4A CN107589427A (en) | 2017-09-01 | 2017-09-01 | The device of laser radar reception signal amplification |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710781175.4A CN107589427A (en) | 2017-09-01 | 2017-09-01 | The device of laser radar reception signal amplification |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107589427A true CN107589427A (en) | 2018-01-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710781175.4A Pending CN107589427A (en) | 2017-09-01 | 2017-09-01 | The device of laser radar reception signal amplification |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102522687A (en) * | 2011-12-15 | 2012-06-27 | 北京大学 | Single-transmission peak atom light filter and light filtering method |
| CN102709802A (en) * | 2012-06-05 | 2012-10-03 | 中国科学院武汉物理与数学研究所 | Excited state atom filter receiving device for pumping laser atom frequency stabilization |
| CN103293579A (en) * | 2013-05-21 | 2013-09-11 | 北京大学 | Low-temperature atomic light filter with low magnetic fields and ultra-narrow line width and method for applying low-temperature atomic light filter |
| CN104297950A (en) * | 2014-10-23 | 2015-01-21 | 浙江大学城市学院 | Mixed gas multi-waveband atomic optical filter and method thereof |
-
2017
- 2017-09-01 CN CN201710781175.4A patent/CN107589427A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102522687A (en) * | 2011-12-15 | 2012-06-27 | 北京大学 | Single-transmission peak atom light filter and light filtering method |
| CN102709802A (en) * | 2012-06-05 | 2012-10-03 | 中国科学院武汉物理与数学研究所 | Excited state atom filter receiving device for pumping laser atom frequency stabilization |
| CN103293579A (en) * | 2013-05-21 | 2013-09-11 | 北京大学 | Low-temperature atomic light filter with low magnetic fields and ultra-narrow line width and method for applying low-temperature atomic light filter |
| CN104297950A (en) * | 2014-10-23 | 2015-01-21 | 浙江大学城市学院 | Mixed gas multi-waveband atomic optical filter and method thereof |
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Application publication date: 20180116 |