CN209148139U - Swept light source for grating vibration sensor-based system - Google Patents
Swept light source for grating vibration sensor-based system Download PDFInfo
- Publication number
- CN209148139U CN209148139U CN201822131980.5U CN201822131980U CN209148139U CN 209148139 U CN209148139 U CN 209148139U CN 201822131980 U CN201822131980 U CN 201822131980U CN 209148139 U CN209148139 U CN 209148139U
- Authority
- CN
- China
- Prior art keywords
- port
- light source
- connect
- tunable
- filter
- 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.)
- Active
Links
Landscapes
- Lasers (AREA)
Abstract
The utility model discloses a kind of swept light sources for grating vibration sensor-based system, including semiconductor optical amplifier, circulator, variable optical attenuator, tunable FP filter, driving circuit and isolator；3rd port of circulator and the input port of variable optical attenuator connect, the output port of variable optical attenuator is connect with the input terminal of tunable FP filter, the output end of tunable FP filter and the 1st port of circulator connect, and driving circuit is connect with tunable FP filter；2nd port of circulator is connect with semiconductor optical amplifier, and the output end of semiconductor optical amplifier and the input terminal of isolator connect, the output end output frequency pulsed light of isolator.The Output optical power of the utility model and frequency swept laser light source in an order of magnitude, can reductions light source signal-to-noise ratio appropriate can satisfy the requirement of grating vibration system, while not damaging TFP while by the spectral concentration of TFP two orders of magnitude of reduction.
Description
Technical field
The utility model relates to light source more particularly to a kind of swept light sources for grating vibration sensor-based system.
Background technique
Optical fiber grating vibration sensor technology has not by electromagnetic interference, scene because of it without power supply, long-term reliability and steady
It is qualitative good, the advantages that long transmission distance, universal application has been obtained in safety-security area.
The key of optical fiber grating vibration sensor system is swept light source.And swept light source generally uses frequency swept laser, passes through
The continuous or step-scan output of laser frequency is realized to the control of Output of laser wavelength, frequency swept laser can be used for high-precision
A kind of fields such as range measurement, laser sensing, laser imaging, it is considered to be very potential high-acruracy survey swept light source.
The modulation device for realizing that the swept light source of wide bandwidth (being greater than 50nm) uses is TFP.
There are some problems for the swept light source of existing SOA+TFP wide range.SOA(semiconductor optical
Amplifier semiconductor optical amplifier) due to using laser principle, by TFP, (Tunable FP Cavity Filter can
Tune FP filter) light be laser, its spectrum density is very high, is easily damaged TFP.But it is used for optical fiber grating vibration sensor
It is so high need not to reach frequency swept laser light source to the signal-to-noise ratio requirement of light source for system.Then can with a kind of new method of demand,
Make Output optical power and frequency swept laser light source in an order of magnitude, can reduction light source signal-to-noise ratio appropriate, pass through simultaneously
The spectral concentration of TFP reduces by two orders of magnitude, can satisfy the requirement of grating vibration system in this way, while not damaging TFP.
Utility model content
For wide range swept light source deficiency or improved demand in optical fiber grating vibration sensor system is currently used for, this is practical
Novel to provide a kind of main amplification swept light source based on SOA+TFP, its purpose is to provide a kind of new to meet optical fiber light
The swept light source of grid vibration sensing system index request.
The technical scheme adopted by the utility model to solve the technical problem is as follows:
A kind of swept light source for grating vibration sensor-based system is provided, including semiconductor optical amplifier SOA, circulator,
Variable optical attenuator, tunable FP filter, driving circuit and isolator；
3rd port of circulator and the input port of variable optical attenuator connect, the output end of variable optical attenuator
Mouth is connect with the input terminal of tunable FP filter, and the output end of tunable FP filter and the 1st port of circulator connect, and is driven
Dynamic circuit is connect with tunable FP filter；
2nd port of circulator is connect with semiconductor optical amplifier, the output end of semiconductor optical amplifier and isolator
Input terminal connection, the output end output frequency pulsed light of isolator.
Above-mentioned technical proposal is connect, driving circuit is triangular voltage driving circuit.
Above-mentioned technical proposal is connect, the tunable range of tunable FP filter is greater than 50nm.
Above-mentioned technical proposal is connect, the output end of isolator is FC-APC connector.
From above-mentioned principle Analysis, 1) the frequency swept laser light source of SOA is used, the maximum power of output is by SOA
What saturation output power determined, it can the approximate saturation output power for being approximately equal to SOA.Using main amplifier framework is used, utilize
SOA spontaneous emission light is modulated at by TFP returns through SOA amplification output, and maximum Output optical power is also the saturation by SOA
Output power determines, approximate can be approximately equal to the saturation output power of SOA.Thus source device output optical power and frequency sweep of the present invention
Laser light source is in an order of magnitude.2) it is previously noted for optical fiber grating vibration sensor system, the signal-to-noise ratio of light source is wanted
Ask that need not to reach frequency swept laser light source so high.Using light source of the invention, signal-to-noise ratio is lower than frequency swept laser light source
About two orders of magnitude, so the spectral concentration by TFP reduces by two orders of magnitude.
The beneficial effect that the utility model generates is: the utility model uses main amplifier framework, is put using semiconductor light
Big device SOA spontaneous emission light is returned again to amplify by semiconductor optical amplifier SOA and be exported by TFP modulation, makes Output optical power
With frequency swept laser light source in an order of magnitude, while two numbers are reduced by the spectral concentration of tunable FP filter TFP
Magnitude, can satisfy the requirement of grating vibration system in this way, while not damage TFP.
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 structural schematic diagram of the utility model embodiment for the swept light source of grating vibration sensor-based system；
Fig. 2 is the triangle wave voltage waveform diagram of TFP driving voltage source of embodiment of the present invention output.
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, swept light source of the utility model for grating vibration sensor-based system includes semiconductor optical amplifier 1
(SOA), circulator 2, variable optical attenuator 3 (VOA), tunable FP filter 4 (TFP), driving circuit 6 and isolator 5.
The 3rd port (end c) of circulator 2 is connect with the input port of variable optical attenuator 3 (VOA), tunable light decay
The input terminal of the output port and TFP4 that subtract device 3 (VOA) connects, and the output end of TFP4 and the 1st port (end a) of circulator 2 connect
It connects, driving circuit is connect with TFP；
The 2nd port (end b) of circulator is connect with semiconductor optical amplifier 1 (SOA), semiconductor optical amplifier 1 (SOA)
The connection of the input terminal of output end and isolator, the output end output frequency pulsed light of isolator 5.
Triangular voltage driving circuit can be selected in driving circuit 6, and triangular voltage is as shown in Figure 2.
Working principle: the spontaneous emission light that semiconductor optical amplifier SOA is issued enters the 3rd end by the 2nd port of circulator
In mouthful, through overdamping, filtered using tunable FP filter TFP, then the 2nd port is entered by the 1st port.Pass through semiconductor
Image intensifer SOA amplification output.Furthermore the utility model drives tunable FP filter TFP to realize optical frequency using triangle wave voltage
The high-velocity scanning of rate exports.
Above-mentioned semiconductor optical amplifier SOA work is in saturation region, in order to keep optical power in entire broad spectral range uniform.
TFP tunable range is greater than 50nm.
Above-mentioned output end connector (i.e. the output port of isolator) is FC-APC connector.
From the available following information of above-mentioned design
1) the spontaneous emission light spectrum density of SOA is very weak, so the light into TFP is very weak, will not burn out TFP.
2) light of TFP reflection is very strong, but the isolation of circulator the 3rd port to the 2nd port is greater than 50dB, so will not
Into SOA, it is had an impact.
3) it can be entered back into SOA, be amplified by circulator by the FP light modulated.It can guarantee that optical power amplifies 20dB
More than, even up to 30dB.
4) bandpass filter is not needed, the program is not laser, therefore mode competition is not present
5) isolator can prevent the influence of rear orientation light
6) connection type of circulator ensure that the one-way of light, while reduce loss.
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 (4)
1. a kind of swept light source for grating vibration sensor-based system, which is characterized in that including semiconductor optical amplifier, annular
Device, variable optical attenuator, tunable FP filter, driving circuit and isolator；
The input port of 3rd port of circulator and variable optical attenuator connects, the output port of variable optical attenuator with
The input terminal of tunable FP filter connects, and the output end of tunable FP filter and the 1st port of circulator connect, driving electricity
Road is connect with tunable FP filter；
2nd port of circulator is connect with semiconductor optical amplifier, the input of the output end and isolator of semiconductor optical amplifier
End connection, the output end output frequency pulsed light of isolator.
2. the swept light source according to claim 1 for grating vibration sensor-based system, which is characterized in that driving circuit is
Triangular voltage driving circuit.
3. the swept light source according to claim 1 for grating vibration sensor-based system, which is characterized in that TFP's is adjustable
Humorous range is greater than 50nm.
4. the swept light source according to claim 1 for grating vibration sensor-based system, which is characterized in that isolator it is defeated
Outlet is FC-APC connector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822131980.5U CN209148139U (en) | 2018-12-18 | 2018-12-18 | Swept light source for grating vibration sensor-based system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822131980.5U CN209148139U (en) | 2018-12-18 | 2018-12-18 | Swept light source for grating vibration sensor-based system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209148139U true CN209148139U (en) | 2019-07-23 |
Family
ID=67290447
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822131980.5U Active CN209148139U (en) | 2018-12-18 | 2018-12-18 | Swept light source for grating vibration sensor-based system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209148139U (en) |
-
2018
- 2018-12-18 CN CN201822131980.5U patent/CN209148139U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103840365B (en) | Based on the apparatus and method that the adjustable microwave signal of multi-wavelength Brillouin laser produces | |
| CN103278941B (en) | Based on microwave photon filter and the filtering method thereof of stimulated Brillouin scattering dynamic raster | |
| CN109818235B (en) | Weak signal detection amplification system and method based on multimode optoelectronic oscillator | |
| EP3764566A1 (en) | Detection method and device for high-dynamic-range optical time domain reflection | |
| CN104113378A (en) | Apparatus and method capable of tuning microwave signal source of semiconductor optical amplifier | |
| CN102347797A (en) | Multifunctional optical signal processing system | |
| CN1959514A (en) | Adjustable light pulse time-delay device with wide bandwidth and multiple gains based on stimulated brillouin scatter | |
| CN103296567B (en) | Ultra-narrow-linewidth nonlinear gain amplification multi-wavelength fiber laser | |
| WO2023015589A1 (en) | Adaptive multi-channel wind measurement lidar system | |
| CN107086428A (en) | The narrow linewidth fiber pulse laser and its application method of a kind of high-peak power | |
| CN113224622A (en) | Communication band high-flatness large-comb-tooth-spacing linear polarization electro-optic modulation optical frequency comb light source | |
| CN104596632A (en) | Distributed optical fiber vibration sensor for enhancing long-distance detection, and method of distributed optical fiber vibration sensor | |
| JPH01298824A (en) | Optical waveform shaping device | |
| CN104934840A (en) | Microwave oscillator based on sapphire filter | |
| CN209148139U (en) | Swept light source for grating vibration sensor-based system | |
| CN106226970B (en) | A kind of full photo threshold device and its preparation method and application based on two-dimensional material wavelength convert function | |
| CN104597686A (en) | Microwave photon concatenation system | |
| CN107579776A (en) | Optical fiber telecommunications system based on free space | |
| CN114646941B (en) | Electrically-controlled pulse laser for coherent laser radar | |
| CN115939923A (en) | Double-pump cascade type ultra-narrow linewidth Brillouin random laser | |
| CN205680924U (en) | A kind of pure-tone pulse full-optical-fiber laser based on Self-phase modulation precompensation | |
| CN202720428U (en) | Device for improving gain of fiber parameter amplifier by adopting phase-shifting grating | |
| CN104597687A (en) | Optical single-side band modulation device and method | |
| CN203691408U (en) | Low-noise optical amplifier | |
| CN102162969A (en) | Multi-stage slow-light delay structure based on high-gain Brillouin effect of short single-mode fiber |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |