CN109916512A - A kind of novel photoelectric-detection system - Google Patents
A kind of novel photoelectric-detection system Download PDFInfo
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- CN109916512A CN109916512A CN201910259480.6A CN201910259480A CN109916512A CN 109916512 A CN109916512 A CN 109916512A CN 201910259480 A CN201910259480 A CN 201910259480A CN 109916512 A CN109916512 A CN 109916512A
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Abstract
A kind of novel photoelectric-detection system, belongs to photodetection field.Including light source to be measured, optical modulator, fiber coupler, beam collimator, quartz tuning-fork, preamplifier, locking phase amplification module, display screen etc..Light source to be measured is connected to optical modulator, optical modulator is connected to fiber coupler input terminal, fiber coupler output end is connected respectively to beam collimator a, b, quartz tuning-fork is placed between two beam collimators, quartz tuning-fork is connected to preamplifier, preamplifier is connected to locking phase amplification module, and locking phase amplification module is connected to display screen.Present system realizes the detection of optical power, uses quartz tuning-fork as detecting element, increases detection range, while having many advantages, such as that structure is simple, no dark current.
Description
Technical field
The present invention relates to a kind of optical power detection techniques, specifically be a kind of photodetection system based on quartz tuning-fork
System.Belong to technical field of photoelectric detection.
Background technique
Photodetector for light radiation being converted to electricity has all obtained extensively on experimental study and commercial product
General application.Current optical detector is mainly based upon photoelectric effect and photo-thermal effect designs, and has structure mostly
Simply, the advantages that cheap, but there is also easy saturation, easily puncture, the disadvantages of there are dark current.
Application No. is the inventions " a kind of photodetector " of 201410405015.6, the artificial Peking University of application to propose one
Kind leads the photodetector of material using novel photoelectric.The invention photomultiplier transit effect is strong, toxicity is low and easy of integration, but easily full
With the disadvantages of easy breakdown not be improved significantly.
Thus, designing a kind of novel photoelectric-detection system has important application value.
Summary of the invention
To overcome the shortcomings of existing technologies and insufficient, the invention proposes a kind of novel photoelectric-detection systems.System benefit
It uses quartz tuning-fork as detecting element, converts optical signals to vibration signal, then will be vibrated by the piezoelectric effect of quartz crystal
Signal is converted into electric signal and is detected.The quartz tuning-fork Q value of Vacuum Package is about higher in 10000 or so, Q value, sensitivity
It is higher with resolution ratio.
The technical scheme is that realize in the following manner:
A kind of novel photoelectric-detection system, including light source to be measured, optical modulator, fiber coupler, beam collimator a, b,
Quartz tuning-fork, preamplifier, locking phase amplification module, display screen, it is characterised in that light source to be measured is connected to optical modulator, light tune
Device processed is connected to fiber coupler input terminal, and fiber coupler output end divides two-way to be connected to beam collimator a, b, quartz tuning-fork
It is placed between two beam collimators, quartz tuning-fork is connected to preamplifier, and preamplifier is connected to locking phase amplification module, lock
Phase amplification module is connected to display screen；
The quartz tuning-fork is made of cylindrical metal shell and tuning fork, and the two sides of metal shell have transparent material system
At window；Tuning fork is Y-shaped, and there are two mutual corresponding prongs for front end band, is made of quartz material；Rear end is that tuning fork is fixed
Seat, entire tuning fork are fixed within shell by its fixing seat, and two prongs are respectively placed at two transparent windows, sound
The signal output end of fork is fixed on the bottom of cylindrical shell and is connected with the input terminal of preamplifier, and entire shell is
Vacuum Package.
The resonant frequency of the quartz tuning-fork is 32.768KHz.
The optical modulator is chopper electrooptic modulator or acousto-optic modulator.
The detection system course of work of the present invention is as follows: said detecting system connected and debugged, continuous light connects to be measured
To optical modulator, become light identical with quartz tuning-fork resonant frequency after optically modulated device modulation, optical modulator is connected to optical fiber
Coupler input, the light of the frequency are connected respectively to beam collimator a, b after the output of fiber coupler output end, and two
The light of beam same frequency is incident in it after beam collimator collimates by the transparent window of quartz tuning-fork cylindrical metal shell
On two prongs of portion's tuning fork, periodically variable optical pressure can be such that two prongs of quartz tuning-fork move toward one another, quartzy sound
Vibration signal is converted electric signal by the piezoelectric effect of fork, and faint electric signal transmission to preamplifier is tentatively amplified,
And current signal is converted into voltage signal, preamplifier is connected to locking phase amplification module, is obtained by locking phase amplification module
DC component signal with useful signal amplitude information, locking phase amplification module are connected to display screen, and signal is shown in display screen
On, optical power to be measured is pushed away come counter by direct current signal amplitude, achievees the purpose that detection optical power to be measured.
Present system realizes the detection of optical power, uses quartz tuning-fork as detecting element, increases detection range,
Have many advantages, such as that structure is simple simultaneously, no dark current.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of detection system of the present invention.
Wherein: 1. light sources to be measured, 2. optical modulators, 3. fiber couplers, 4. beam collimator a, 5. beam collimator b,
6. preamplifier, 7. locking phase amplification modules, 8. display screens, 9. quartz tuning-forks.
Fig. 2 is quartz tuning-fork specific structure signal of the metal-back two sides of Vacuum Package used in the present invention with transparent window
Figure.
Wherein: transparent window on the left of i. metal shell, ii. metal shell right side transparent window, iii quartz tuning-fork left side sound
Yoke, iv. quartz tuning-fork right side prong, v. quartz tuning-fork fixing seat, vi. quartz tuning-fork signal output end.
Specific embodiment
Present invention will be further explained below with reference to the attached drawings and examples, but not limited to this.
Embodiment 1:
As shown in Figs. 1-2, a kind of novel photoelectric-detection system, including light source to be measured 1, optical modulator 2, fiber coupler 3,
Beam collimator a4, beam collimator b5, preamplifier 6, locking phase amplification module 7, display screen 8, quartz tuning-fork 9.Its feature
It is that light source 1 to be measured is connected to optical modulator 2, optical modulator 2 is connected to 3 input terminal of fiber coupler, and fiber coupler 3 exports
End is connected respectively on beam collimator a4 and beam collimator b5, and quartz tuning-fork 9 is placed between two beam collimators 4,5, stone
English tuning fork 9 is connected to preamplifier 6, and preamplifier 6 is connected to locking phase amplification module 7, and locking phase amplification module 7 is connected to aobvious
Display screen 8；
The quartz tuning-fork 9 is made of cylindrical metal shell and tuning fork, and the two sides of metal shell have transparent material
Manufactured window；Tuning fork is Y-shaped, and there are two mutual corresponding prongs for front end band, is made of quartz material；Rear end is that tuning fork is solid
Reservation, entire tuning fork are fixed within shell by its fixing seat v, and two prongs iii and iv are respectively placed on two thoroughly
At bright window i and ii, the signal output end vi of quartz tuning-fork 9 is fixed on bottom and the preamplifier 6 of cylindrical shell
Input terminal is connected, and entire shell is Vacuum Package.
The optical modulator is electrooptic modulator, and light frequency modulation is 32.768KHz by model M350-80.
The quartz tuning-fork resonant frequency is 32.768KHz.
The detection system course of work of the present invention is as follows: said detecting system being connected and debugged, continuous light source 1 to be measured connects
It is connected to optical modulator 2, optically modulated device 2 becomes light identical with 5 resonant frequency of quartz tuning-fork after modulating, optical modulator 2 connects
To 3 input terminal of fiber coupler, frequency is that the light of 32.768KHz is divided into two-way after fiber coupler 3, is separately connected light
The light of beam collimator a4 and beam collimator b5, two beam same frequencys pass through 9 cylinder of quartz tuning-fork after the collimation of beam collimator 4,5
Transparent window i, ii of shape metal shell are incident on two prongs iii, iv of its internal tuning fork, periodically variable optical pressure
Two prongs iii, iv of quartz tuning-fork 9 can be made to move toward one another, vibration signal is converted electricity by the piezoelectric effect of quartz tuning-fork 9
Signal, faint electric signal transmission are tentatively amplified to preamplifier 6, and current signal is converted to voltage signal, preceding
It sets amplifier 6 and is connected to locking phase amplification module 7, the direct current with useful signal amplitude information is obtained by locking phase amplification module 7
Component signal, locking phase amplification module 7 are connected to display screen 8, and signal is shown on display screen 8, by direct current signal amplitude come anti-
Optical power to be measured is pushed away, achievees the purpose that detection optical power to be measured.
Embodiment 2:
Identical with embodiment 1, only the optical modulator is chopper, and model M-300CD extends function using it
It can be 32.768KHz by light frequency modulation.
Embodiment 3:
Identical with embodiment 1, only the optical modulator is acousto-optic modulator, model G-1550-M40-L-
Light frequency modulation is 32.768KHz by D400-T-C-A.
Claims (3)
1. a kind of novel photoelectric-detection system, including light source to be measured, optical modulator, fiber coupler, beam collimator a, b, stone
English tuning fork, preamplifier, locking phase amplification module, display screen, it is characterised in that light source to be measured is connected to optical modulator, light modulation
Device is connected to fiber coupler input terminal, and fiber coupler output end divides two-way to be connected to beam collimator a, b, and quartz tuning-fork is set
Between two beam collimators, quartz tuning-fork is connected to preamplifier, and preamplifier is connected to locking phase amplification module, locking phase
Amplification module is connected to display screen；
The quartz tuning-fork is made of cylindrical metal shell and tuning fork, and the two sides of metal shell are with made of transparent material
Window；Tuning fork is Y-shaped, and there are two mutual corresponding prongs for front end band, is made of quartz material；Rear end is tuning fork fixing seat,
Entire tuning fork is fixed within shell by its fixing seat, and two prongs are respectively placed at two transparent windows, tuning fork
Signal output end be fixed on the bottom of cylindrical shell and be connected with the input terminal of preamplifier, entire shell is true
Sky encapsulation.
2. a kind of novel photoelectric-detection system as described in claim 1, it is characterised in that the quartz tuning-fork resonant frequency
For 32.768KHz.
3. a kind of novel photoelectric-detection system as described in claim 1, it is characterised in that the optical modulator is chopper
Electrooptic modulator or acousto-optic modulator.
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| CN201910259480.6A CN109916512A (en) | 2019-04-02 | 2019-04-02 | A kind of novel photoelectric-detection system |
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| CN201910259480.6A CN109916512A (en) | 2019-04-02 | 2019-04-02 | A kind of novel photoelectric-detection system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113218901A (en) * | 2021-05-07 | 2021-08-06 | 安徽大学 | Cavity enhanced spectrum gas detection device and method based on micro quartz crystal oscillator array detector |
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Application publication date: 20190621 |