CN207937064U - A kind of device expanding APD linear probing ranges - Google Patents
A kind of device expanding APD linear probing ranges Download PDFInfo
- Publication number
- CN207937064U CN207937064U CN201820472342.7U CN201820472342U CN207937064U CN 207937064 U CN207937064 U CN 207937064U CN 201820472342 U CN201820472342 U CN 201820472342U CN 207937064 U CN207937064 U CN 207937064U
- Authority
- CN
- China
- Prior art keywords
- apd
- amplifier
- light
- comparator
- linear probing
- 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.)
- Withdrawn - After Issue
Links
- 230000003287 optical effect Effects 0.000 claims abstract description 38
- 230000003321 amplification Effects 0.000 claims description 12
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 12
- 230000015572 biosynthetic process Effects 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000001514 detection method Methods 0.000 abstract description 4
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 229920006395 saturated elastomer Polymers 0.000 description 4
- 238000005259 measurement Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
Landscapes
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The utility model discloses a kind of device expanding APD linear probing ranges, by spectroscope by incident strong optical signal according in different pro rate to two identical APD, unsaturated APD is selected to be inputted as rear class using comparator control switch, ensure under the premise of light signal strength is penetrated in unattenuated trunk offering, APD can detect the incident optical signal of the bigger range of linearity, improve the linear probing range of APD response luminous powers, the device includes optical receiver, spectroscope, speculum, first APD, 2nd APD, first amplifier, second amplifier, comparator, hilted broadsword two-way switch, with strong antijamming capability, the advantages that good environmental adaptability, improve the detection performance of APD, effectively expand the linear probing range of APD.
Description
Technical field
The utility model is related to Electro-Optical Sensor Set field, especially a kind of device expanding APD linear probing ranges.
Background technology
APD belongs to a kind of photoproduction volt device of interior gain, and principle is the orientation by photo-generated carrier under highfield
It moves to form avalanche effect, and obtains larger photocurrent gain, there is small-sized, high sensitivity, fast response time, the linearity
Well, the advantages that quantum efficiency is high, is widely used in the fields such as laser ranging, space communication, biologic medical.Although APD is operated in
The sensitivity of singl e photon detection can be reached under Geiger pattern, but photon can only also be counted, it is strong when existing in environment
When light interferes, the photoelectric current of APD conversions will be saturated rapidly, can not be handled optical signal；If declining to strong optical signal
Subtract processing, and a large amount of useful information can be lost, makes distorted signals.It is deep it is therefore desirable to be carried out for the detection of strong optical signal
Enter research, realizes the linear measurement of strong optical signal, improve the applicability of environment.
Invention content
For problem of the prior art, the purpose of this utility model is to provide one kind capable of improving APD in strong optical signal
Under linear probing range and realize strong optical signal linear measurement expansion APD linear probing ranges device.
In order to realize that above-mentioned technical purpose, the technical solution adopted in the utility model be：
A kind of device expanding APD linear probing ranges, including optical receiver, spectroscope, speculum, the first APD, second
APD, the first amplifier, the second amplifier, comparator and hilted broadsword two-way switch, the incident light that the optical receiver will receive
Signal is emitted to spectroscope, and incident light is divided into transmitted light and reflected light by spectroscope and is correspondingly formed light path, and described first
APD, the first amplifier are sequentially disposed in the light path of transmitted light formation, and the speculum, the 2nd APD, the second amplifier are sequentially
In the light path that reflected light is formed, wherein transmitted light is converted to electric signal into the first APD, and reflected light turns into the 2nd APD
It is changed to electric signal；The electric signal that first APD and the 2nd APD is generated passes through the first amplifier respectively and the second amplifier amplifies
After export, first amplifier and the second amplifier are connected with two input terminals of hilted broadsword two-way switch respectively；The comparison
There are two input terminal and an output end, the output ends of first amplifier to be also connected with an input terminal of comparator for utensil,
Another input terminal of the comparator is applied with comparison voltage Vset, output end and the hilted broadsword two-way switch phase of the comparator
Even, and for controlling the hilted broadsword two-way switch it is connected with the first amplifier or the second amplifier.
Further, the optical receiver is used to incident optical signal being shaped as the hot spot ruler of collimated light beam and collimated light beam
It is very little identical as the first APD and the photosurface size of the 2nd APD, and the light intensity of incident light handled through optical receiver is unattenuated.
Further, spectroscopical splitting ratio is that adjustable and spectroscopical light transmission power is more than reflected optical power.
Further, the first APD and the 2nd APD is two identical APD units, APD array or APD chips.
Further, the ratio between amplification factor of the amplification factor of first amplifier and the second amplifier with spectroscopical point
Light ratio is in inverse relation.
Further, the original state of the hilted broadsword two-way switch is to be connected with the first amplifier；It is defeated when the first amplifier
Go out another input terminal input of voltage and comparator comparison voltage it is close when, the hilted broadsword two-way switch and the first amplifier
It disconnects and is connected with the second amplifier.
Compared to the prior art, the utility model has the beneficial effects that：It will be after optical receiver be handled by spectroscope
The strong pro rate of optical signal as required is to two identical APD（That is the first APD and the 2nd APD）On so that one of them
APD is operated in unsaturated state, then selects unsaturated APD to be inputted as rear class by control comparator, makes the detection of output
Signal within the scope of the linear probing of APD, realizes the linear measurement to signal always, expands the line of APD response luminous powers
Property investigative range, in addition the utility model device also have many advantages, such as strong antijamming capability, good environmental adaptability.
Description of the drawings
The utility model is further elaborated with reference to the accompanying drawings and detailed description：
Fig. 1 is the catenation principle figure for the device that the utility model expands APD linear probing ranges.
Specific implementation mode
As shown in Figure 1, the utility model include optical receiver 101, spectroscope 102, speculum 103, the first APD 104,
2nd APD 105, the first amplifier 106, the second amplifier 107, comparator 108 and hilted broadsword two-way switch 109；
Incident optical signal light is accurate by the incident optical signal received by optical receiver 101 after the reception of optical receiver 101
Direct join is emitted to spectroscope 102, and incident light is divided into transmitted light and reflected light by spectroscope 102 and is correspondingly formed light path, described
The first APD 104, the first amplifier 106 be sequentially disposed at transmitted light formation light path on, the speculum 103, the 2nd APD
105, the second amplifier 107 is sequentially disposed in the light path of reflected light formation, wherein transmitted light is turned after entering the first APD 104
It is changed to electric signal, reflected light is converted into electric signal after entering the 2nd APD 105；First APD 104 and the 2nd APD 105
The electric signal of generation exports after the first amplifier 106 and the amplification of the second amplifier 107 respectively, first amplifier 106
It is connected respectively with two input terminals of hilted broadsword two-way switch 109 with the second amplifier 107；There are two defeated for the tool of comparator 108
Enter end and an output end, the output end of first amplifier 106 is also connected with an input terminal of comparator 108, the ratio
Another input terminal compared with device 108 is applied with comparison voltage Vset, output end and the hilted broadsword two-way switch phase of the comparator 108
Even, and for controlling the hilted broadsword two-way switch it is connected with the first amplifier 106 or the second amplifier 107.
Wherein, after incident optical signal is shaped as collimated light beam by the optical receiver 101, the spot size of collimated light beam
Light intensity of incident light identical as the first APD 104 and the photosurface size of the 2nd APD 105, and being handled through optical receiver 101
It is unattenuated, further, the first APD 104 and the 2nd APD 105 can be two identical APD units, APD array or
APD chips.
In addition, the splitting ratio of the spectroscope 102, which is adjustable and spectroscope 102 light transmission power, is more than reflected optical power,
The ratio between amplification factor of the amplification factor of first amplifier 106 and the second amplifier 107 and the splitting ratio of spectroscope 102 are in
Inverse relation.
Further, the original state of the hilted broadsword two-way switch is to be connected with the first amplifier；It is defeated when the first amplifier
Go out another input terminal input of voltage and comparator comparison voltage it is close when, the hilted broadsword two-way switch and the first amplifier
It disconnects and is connected with the second amplifier.
Embodiment 1
Referring to Fig. 1, wherein the power of incident optical signal is 1mW, the luminous power after the collimation of the optical receiver 101
Splitting ratio for 1mW, the spectroscope 102 is 99:1, i.e., by the spectroscope 102 light splitting after transmitted optical power be
0.99mW, reflected optical power 0.01mW, the first APD 104 and the 2nd APD 105 saturation luminous power all be 0.5mW,
The voltage exported under saturation state is 0.5V, and 106 amplification factor of the first amplifier is 1, and the amplification factor of the second amplifier 107 is
99, the comparison voltage VsetFor 0.5V.
When transmitted light is incident on an APD 104, transmitted optical power 0.99mW is more than the first APD104's
It is saturated luminous power 0.5mW, the first APD04 is made to reach saturated, it is 0.5V to export a saturation voltage, by institute
It is 0.5V to state the voltage exported after the amplification of the first amplifier 106, and the comparator 108 receives first amplifier 106
Voltage signal, the signal and the comparison voltage VsetIt is identical, therefore the comparator 108 controls the hilted broadsword two-way switch 109
It is connected with second amplifier 107.
When reflected light is incident on two APD105 after the reflection of the speculum 103, reflected optical power
0.01mW is less than the saturation luminous power 0.5mW of the 2nd APD105, and the 2nd APD105 will not be made to reach saturation work shape
State, the 2nd APD105 are operated within the scope of linear probing, and the voltage of output is 0.01V, by second amplifier 107
The voltage exported after amplification is 0.99V, and second amplifier 107 is connected with the hilted broadsword two-way switch 109 at this time, therefore
Output signal VoutAs 0.99V, and this signal is linear signal.APD detects 0.5mW of the luminous power by saturated
It has been increased to the 0.99mW of linear working state, has expanded the linear probing range of APD, more useful incidences can be detected
Optical signal.
The foregoing describe specific embodiment of the present utility model, it will be appreciated by those of skill in the art that this is only
Be for example, those skilled in the art is under the premise of without departing substantially from the principles of the present invention and essence, can be to this reality
The mode of applying makes various changes or modifications, but these change and modification each fall within the scope of protection of the utility model.
Claims (6)
1. a kind of device expanding APD linear probing ranges, it is characterised in that：Including optical receiver, spectroscope, speculum,
One APD, the 2nd APD, the first amplifier, the second amplifier, comparator and hilted broadsword two-way switch, the optical receiver will receive
To incident optical signal be emitted to spectroscope, incident light is divided into transmitted light and reflected light by spectroscope and is correspondingly formed light path,
First APD, the first amplifier are sequentially disposed in the light path of transmitted light formation, the speculum, the 2nd APD, second
Amplifier is sequentially disposed in the light path of reflected light formation, wherein transmitted light is converted to electric signal into the first APD, reflected light into
Enter the 2nd APD and is converted to electric signal；The electric signal that first APD and the 2nd APD are generated passes through the first amplifier and the respectively
Exported after the amplification of two amplifiers, first amplifier and the second amplifier respectively with two input terminal phases of hilted broadsword two-way switch
Even；The described comparator tool there are two input terminal and an output end, the output end of first amplifier also with comparator one
A input terminal is connected, another input terminal of the comparator is applied with comparison voltage Vset, the output end and list of the comparator
Knife two-way switch is connected, and is connected with the first amplifier or the second amplifier for controlling the hilted broadsword two-way switch.
2. a kind of device expanding APD linear probing ranges according to claim 1, it is characterised in that：The light connects
Receive the sense that device is used to incident optical signal being shaped as the spot size and the first APD and the 2nd APD of collimated light beam and collimated light beam
Smooth surface size is identical.
3. a kind of device expanding APD linear probing ranges according to claim 1, it is characterised in that：The spectroscope
Splitting ratio be that adjustable and spectroscopical light transmission power is more than reflected optical power.
4. a kind of device expanding APD linear probing ranges according to claim 1, it is characterised in that：Described first
APD and the 2nd APD is two identical APD units, APD array or APD chips.
5. a kind of device expanding APD linear probing ranges according to claim 1, it is characterised in that：Described first puts
The ratio between the amplification factor of big device and the amplification factor of the second amplifier are in inverse relation with spectroscopical splitting ratio.
6. a kind of device expanding APD linear probing ranges according to claim 1, it is characterised in that：The hilted broadsword is double
It is to be connected with the first amplifier to the original state of switch；When another input of the output voltage and comparator of the first amplifier
When holding the comparison voltage of input close, the hilted broadsword two-way switch disconnects with the first amplifier and is connected with the second amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820472342.7U CN207937064U (en) | 2018-04-03 | 2018-04-03 | A kind of device expanding APD linear probing ranges |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820472342.7U CN207937064U (en) | 2018-04-03 | 2018-04-03 | A kind of device expanding APD linear probing ranges |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207937064U true CN207937064U (en) | 2018-10-02 |
Family
ID=63656333
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820472342.7U Withdrawn - After Issue CN207937064U (en) | 2018-04-03 | 2018-04-03 | A kind of device expanding APD linear probing ranges |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207937064U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108318132A (en) * | 2018-04-03 | 2018-07-24 | 福建海创光电有限公司 | A kind of device expanding APD linear probing ranges |
-
2018
- 2018-04-03 CN CN201820472342.7U patent/CN207937064U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108318132A (en) * | 2018-04-03 | 2018-07-24 | 福建海创光电有限公司 | A kind of device expanding APD linear probing ranges |
| CN108318132B (en) * | 2018-04-03 | 2024-02-20 | 福建海创光电技术股份有限公司 | Device for expanding linear detection range of APD |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110308456B (en) | Bias voltage adjusting device for improving detection distance and laser radar system | |
| Hong et al. | A linear-mode LiDAR sensor using a multi-channel CMOS transimpedance amplifier array | |
| CN109375194A (en) | AFE(analog front end) reading circuit for laser radar | |
| CN106680829B (en) | Linear array real time imagery pulse lidar device | |
| CN101776749B (en) | Vehicle-mounted staring imaging laser radar synchronous triggering system | |
| CN101975594A (en) | Distributed realtime fiber bragg grating wavelength demodulating system and method | |
| CN114114212B (en) | Pulse signal amplifying circuit, echo signal receiving system and laser radar | |
| US10782408B2 (en) | Calibration method and device based on single-wavelength double-laser-tube phase measurement | |
| CN103576162A (en) | Laser radar device and method for measuring target object distance through device | |
| CN108318132A (en) | A kind of device expanding APD linear probing ranges | |
| CN110780281A (en) | Optical phased array laser radar system | |
| CN110456373A (en) | The distance measuring method for receiving circuit, laser radar and laser radar of laser radar | |
| CN108896979A (en) | A kind of the pulse lidar reception circuit and system of ultra-wide injection measurement range | |
| CN207937064U (en) | A kind of device expanding APD linear probing ranges | |
| CN206114113U (en) | Automatically controlled light sampling system and terahertz be time domain spectrum appearance now | |
| CN106461764A (en) | Calibration Method and Device Based on Single Wavelength Dual Laser Tube Phase Measurement | |
| CN209656893U (en) | A kind of pulse type laser radar system | |
| CN204422755U (en) | A kind of novel high speed high-precision laser range-finding system | |
| CN104020460A (en) | Echo signal amplification circuit of laser ranging system | |
| CN109932705B (en) | Ultra-wide dynamic range laser echo receiving device and control method thereof | |
| Ahmad et al. | High-Power and high-responsivity avalanche photodiodes for self-heterodyne FMCW LiDAR system applications | |
| CN103326795B (en) | Method for broadband radio-frequency signal correlation detection based on time-spectrum convolution principle | |
| CN209842054U (en) | Ultra-wide dynamic range laser echo receiving device | |
| Lamela et al. | A low power laser rangefinder for autonomous robot applications | |
| CN116449338A (en) | Distance measuring method, laser detection device and laser scanner |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 350100 floor 5, building 19, phase II, innovation park, No. 7, middle wulongjiang Avenue, Shangjie Town, Minhou County, Fuzhou City, Fujian Province Patentee after: Fujian Haichuang Photoelectric Technology Co.,Ltd. Address before: 350005 room 505, 5 / F, zone B, Chuangye building, Haixi high tech Industrial Park, high tech Zone, Minhou County, Fuzhou City, Fujian Province Patentee before: FUJIAN HAICHUANG PHOTOELECTRIC CO.,LTD. |
|
| CP03 | Change of name, title or address | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20181002 Effective date of abandoning: 20240220 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20181002 Effective date of abandoning: 20240220 |
|
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |