CN108333689A - A kind of multi-channel optical receiving unit of integrated adjustable narrow band filter - Google Patents
A kind of multi-channel optical receiving unit of integrated adjustable narrow band filter Download PDFInfo
- Publication number
- CN108333689A CN108333689A CN201810252289.4A CN201810252289A CN108333689A CN 108333689 A CN108333689 A CN 108333689A CN 201810252289 A CN201810252289 A CN 201810252289A CN 108333689 A CN108333689 A CN 108333689A
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- China
- Prior art keywords
- narrow band
- band filter
- photoelectric detection
- detection module
- optical
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
- G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
- G02B6/29379—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means characterised by the function or use of the complete device
- G02B6/2938—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means characterised by the function or use of the complete device for multiplexing or demultiplexing, i.e. combining or separating wavelengths, e.g. 1xN, NxM
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
- G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
- G02B6/29379—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means characterised by the function or use of the complete device
- G02B6/29389—Bandpass filtering, e.g. 1x1 device rejecting or passing certain wavelengths
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/60—Receivers
Abstract
The present invention relates to fiber optic telecommunications equipment fields, more particularly to a kind of multi-channel optical receiving unit of integrated adjustable narrow band filter, including several light paths, preposition coupled lens, optical demultiplexer, postposition coupled lens module group and photoelectric detection module group, it is characterized in that, it further includes narrow band filter module group and narrow band filter feedback module group；Optical signal is entered by preposition coupled lens, then separates n item light branches into optical demultiplexer, and every light branch end is separately connected narrow band filter, postposition coupled lens and photoelectric detection module.Beneficial effects of the present invention are：The ambient noise filtration result for enhancing the optical signal of optical demultiplexer outgoing, improves the signal-to-noise ratio of multi-wavelength's optical signal of incident photoelectric detection module group；By adding narrow band filter feedback module, the filter center wavelength for adjusting narrow band filter is operated in optimal value.
Description
Technical field
The present invention relates to fiber optic telecommunications equipment fields, and in particular to a kind of multi-channel optical of integrated adjustable narrow band filter connects
Receive component.
Background technology
In multi channel speed fiber optic communication systems, each channel has different wavelength, and light-receiving component is to channel
Control and actual channel selection need optical wavelength to select, even if using lightwave filter.In existing multi-channel optical receiving unit
Its light wave demultiplexer（ODEMUX）Device itself has certain filter action, such as more letters of patent CN201410068800.7
The parallel light-receiving component and optical module and patent of multichannel wavelength of road light-receiving component, CN201520843014.X
In three patents such as a kind of light emission component with aimer, light-receiving component and optical module of CN201610093936.2
Described, the optical signal of mixed wavelengths enters light wave demultiplexer, the catadioptric process of the partial wave module through light wave demultiplexer
And the selection index system of four wavelength diaphragms, the difference of mixed wavelengths signal wavelength basis detach herein.
Preamplifier of the semiconductor optical amplifier as optical receiving end can carry out the signal light for entering optical receiving end
Light amplification, with transmission loss of the thermal compensation signal light in long-distance light path, this light amplification process improves the signal work(of optical receiving end
Rate and signal-to-noise ratio finally improve the detectivity of optical receiving end.But make letter during the light amplification of semiconductor optical amplifier
Number light generates wider spontaneous radiation ambient noise（ASE ambient noise light）.In order to filter out this ambient noise, usually in semiconductor
The filter that certain bandwidth is placed after image intensifer, such as the application of semiconductor optical amplifier single channel optical receiving end：Patent
Amplification controller, semiconductor optical amplifier control method and the optical transmission equipment and patent of CN200880131443.7
US006714345B2 SEMICONDUCTOR OPTICAL AMPLIFIER PROVIDING HIGH GAIN, HIGH POWER
Described in AND LOW NOISE FIGURE.Semiconductor optical amplifier is same during the light amplification of multi-channel optical receiving unit
Sample has that noise is big, with the application that it constantly rises in multi-channel optical receiving unit, when the light of light wave demultiplexer
When wave diaphragm cannot meet the spontaneous radiation wide range noise for filtering out light amplification, need to consider to detach multi-channel optical receiving unit
The problem of optical channel is further filtered.
Invention content
The technical problem to be solved by the present invention is to：Semiconductor optical amplifier is asked in multichannel amplification there are noise is big
Topic.Propose it is a kind of before photoelectric detection module arrangement with feedback device adjustable narrow band filter one kind integrate it is adjustable narrow
The multi-channel optical receiving unit of band filter.
In order to solve the above technical problems, the technical solution used in the present invention is：A kind of integrated adjustable narrow band filter
Multi-channel optical receiving unit, including several light paths, preposition coupled lens, optical demultiplexer, postposition coupled lens module group and light
Electric detecting module group further includes narrow band filter module group and narrow band filter feedback module group；Optical signal passes through described preposition
The input terminals of coupled lens enters, and after through light path enter the optical demultiplexer, the optical demultiplexer output end separates n items
Light branch, every light branch end are visited by corresponding narrow band filter, corresponding postposition coupled lens and corresponding photoelectricity respectively
Module connection is surveyed, n photoelectric detection module constitutes photoelectric detection module group, and n postposition coupled lens constitute postposition coupled lens
The end of module group, the photoelectric detection module is electrically connected with the narrow band filter feedback module, the narrow band filter
Feedback module is electrically connected with corresponding narrow band filter, and n narrow band filter feedback module constitutes narrow band filter feedback module
Group.The mixed light beam of light path incidence is collimated and is directed to optical demultiplexer by preposition coupled lens, and n is isolated through optical demultiplexer
Item light branch, every light branch pass through narrow band filter, and the filter action through narrow band filter filters out the background in optical signal
Noise improves signal-to-noise ratio, to reduce the bit error rate.Make the centre wavelength work of narrow band filter by narrow band filter feedback module
Make in optimal value, and filters out the spontaneous radiation wide range noise of signal light carrying by its narrow bandwidth value.
Preferably, the optical demultiplexer is prism optical demultiplexer, diffraction grating optical demultiplexer, waveguide optical grating light
One kind in demultiplexer and dielectric film optical demultiplexer.Prism optical demultiplexer, diffraction grating optical demultiplexer, Waveguide
Grid optical demultiplexer and dielectric film optical demultiplexer can realize miniaturization, be conveniently integrated into light-receiving component.
Preferably, the narrow band filter module group corresponds respectively to n item light branch optical signal centre wavelengths by n
Variable band-pass filter constitute.
Preferably, the photoelectric detection module is made of photodetector and preposition electric signal amplifier, it is respectively used to
Opto-electronic conversion and electric signal amplification etc..
Preferably, the narrow band filter feedback module is used to be controlled according to the electric signal that photoelectric detection module group exports
The power supply signal of narrow band filter, including electric signal detector, microprocessor and memory, the electric signal detector and storage
Device is electrically connected with microprocessor, and the microprocessor is electrically connected with the power supply signal control module of narrow band filter, the electricity
Signal sensor is used to obtain the voltage value of n photoelectric detection module output, and the microprocessor is used for according to above-mentioned voltage value
Control the power supply signal of narrow band filter.The electrical signal intensity that photoelectric detection module output is detected by electric signal detector becomes
Change, it can be determined that whether the wavelength of optical signal drifts about, after the wavelength of optical signal drifts about, by adjusting narrow band filter
Power supply signal adjustment narrow band filter filter center wavelength, so that it is matched again with wavelength of optical signal.
Preferably, the narrow band filter module, postposition coupled lens mould and photodetection mould are by free space light path
Connection.It is limited to the minimum profile curvature radius limitation of optical fiber, causes the volume-diminished of the equipment using optic fibre light path to be restricted, makes
The problem that volume can be avoided limited with free space light path.
Preferably, the narrow band filter feedback module group works according to the following steps：A) narrow band filter feedback module
N narrow band filter feedback module of group detects the intensity value of the photoelectric detection module output electric signal of corresponding light branch respectively,
And the maximum electrical signal intensity value of each photoelectric detection module is recorded respectively, narrow band filter feedback module records each narrow simultaneously
The modulation value of band filter, at this time n narrow band filter be operated in respectively on corresponding filter center wavelength；B) when some light branch
The centre wavelength of road signal is drifted about, and when deviateing the filter center wavelength of corresponding narrow band filter, the narrow band filter
The light signal strength of outgoing will be lower, and the intensity value for eventually leading to corresponding photoelectric detection module output electric signal becomes smaller, accordingly
Narrow band filter feedback module monitor this variation, just the centre wavelength of corresponding narrow band filter is adjusted, narrowband
All values in the modulation value of corresponding narrow band filter of filter feedback module walks step A records or so setting range,
And the intensity value of corresponding photoelectric detection module output electric signal in this modulation range is recorded, finally compare and obtains new maximum electricity
Signal strength values and corresponding modulation value, this modulation value is loaded on corresponding narrow band filter, makes corresponding narrow-band filtering
The filter center wavelength shift of device to the matched wavelength of light branch optical signal.
Substantial effect of the invention is：1, the ambient noise for enhancing the optical signal of optical demultiplexer outgoing filters out effect
Fruit improves the signal-to-noise ratio of multi-wavelength's optical signal of incident photoelectric detection module group；2, by adding narrow band filter feedback
Module, the filter center wavelength for adjusting narrow band filter are operated in optimal value.
Description of the drawings
Fig. 1 is the multi-channel optical receiving unit structural schematic diagram of the integrated adjustable narrow band filter.
Fig. 2 is the process schematic that narrow band filter filters out signal light spontaneous radiation wide range ambient noise, wherein Fig. 2（a）
For input light spectrum, Fig. 2（b）For optical demultiplexer third channel filtering band logical curve, Fig. 2（c）Believe for optical demultiplexer third
Road is emitted spectrum, Fig. 2（d）For third channel adjustable narrow band filter band logical, Fig. 2（e）It is emitted for third channel narrow band filter
Spectrum.
Fig. 3 is the filtering schematic diagram of the front and back narrow band filter of narrow band filter feedback module modulation on third channel.
Wherein：101, preposition coupled lens, 102, optical demultiplexer, 103, postposition coupled lens module group, 104, photoelectricity
Detecting module group, 105, narrow band filter module group, 106, narrow band filter feedback module group.
Specific implementation mode
Below by specific embodiment, and in conjunction with attached drawing, the specific implementation mode of the present invention is further described in detail.
As shown in Figure 1, for the multi-channel optical receiving unit structural schematic diagram of the integrated adjustable narrow band filter, including it is several
Light path, preposition coupled lens 101, optical demultiplexer 102, postposition coupled lens module group 103 and photoelectric detection module group 104,
Further include narrow band filter module group 105 and narrow band filter feedback module group 106；Optical signal passes through preposition coupled lens 101
Input terminal enter, and after through light path enter optical demultiplexer 102,102 output end of optical demultiplexer separates n item light branches, often
Item light branch end is connected by corresponding narrow band filter, corresponding postposition coupled lens and corresponding photoelectric detection module respectively
It connects, n photoelectric detection module constitutes photoelectric detection module group 104, and n postposition coupled lens constitute postposition coupled lens module group
103, the end of photoelectric detection module is electrically connected with narrow band filter feedback module, narrow band filter feedback module with it is corresponding
Narrow band filter is electrically connected, and n narrow band filter feedback module constitutes narrow band filter feedback module group 106.Preposition coupling is saturating
The mixed light beam of light path incidence is collimated and is directed to optical demultiplexer 102 by mirror 101, and n item light is isolated through optical demultiplexer 102
Branch, every light branch pass through narrow band filter, and the filter action through narrow band filter effectively filters out the background in optical signal
Noise improves signal-to-noise ratio, to reduce the bit error rate.Make narrow band filter module group by narrow band filter feedback module group 106
105 centre wavelength is operated in optimal value, and is filtered out signal light by the narrow bandwidth value of narrow band filter module group 105 and carried
Spontaneous radiation wide range noise.
The multi-channel optical receiving unit of the present invention, multichannel represent any number of channel of 2 channels or more, and such as 2
Channel, 4 channels, 32 channels etc., corresponding optical demultiplexer 102 have the output port of corresponding number, postposition coupled lens module
Coupled lens of the group 103 with corresponding number, photoelectric detection module group 104 have the photodetector module of corresponding number.With 4
For channel light receiving unit, the present embodiment is described and is illustrated.The light beam of incident 4 channel light receiving units is four kinds of waves
It is long（λ 1, λ 2, λ 3 and λ 4）The mixed light beam of optical signal；Postposition coupled lens module group 103 includes four identical postposition couplings
Lens mould 103a, 103b, 103c and 103d；Photoelectric detection module group 104 include four identical photoelectric detection module 104a,
104b, 104c and 104d.Above-mentioned composite optical signal inputs 4 channel light receiving units, first extremely by the guiding of preposition coupled lens 101
Optical demultiplexer 102, optical demultiplexer 102 detaches four kinds of wavelength channels according to the difference of wavelength, and is held respectively from four
Mouth output.Optical demultiplexer 102 can be selected the Miniaturizables such as prism, diffraction grating, waveguide optical grating, dielectric film and integrate type
Optical demultiplexer.Four kinds of wavelength channels being emitted respectively from 102 4 output ports of optical demultiplexer are filtered by narrowband respectively
Then wave device 105a, 105b, 105c and 105d are guided by postposition coupled lens mould 103a, 103b, 103c and 103d to light respectively
Electric detecting module 104a, 104b, 104c and 104d.Photoelectric detection module 104a, 104b, 104c and 104d are carried out to incidence
Optical signal detection, opto-electronic conversion, electric signal amplification and electric signal output.Photoelectric detection module 104a, 104b, 104c and 104d are
The main circuit comprising modules of common photoreceiver, before the receiver being specially made of photodiode and preamplifier
End.
The specific works of narrow band filter module group 105 and narrow band filter feedback module 106a, 106b, 106c and 106d
Process is as follows：It is wide that narrow band filter 105a, 105b, 105c and 105d by its narrow filtering bandwidth filter out signal light spontaneous radiation
The process schematic for composing ambient noise is as shown in Figure 2.Fig. 2 and Fig. 3 is anti-with narrow band filter on a certain channel and narrow band filter
The elaboration carried out for feedback module routine, the channel as where narrow band filter 105c（Third channel）, two on other channels
The course of work of person is identical with this substantially.
Fig. 2（a）To enter the input spectrum of four road optical signal mixed light beam of multi-channel optical receiving unit, it is seen then that by outer
After the whole light amplification effect of portion's semiconductor optical amplifier, the ASE back ofs the body of wide range have been produced on the input spectrum of this mixed light beam
Scape noise light.Four road optical signals are guided through preposition coupled lens 101 to optical demultiplexer 102, and through the folding of optical demultiplexer 102
The partial waves effect such as reflection, filtering enters individually separated light path.Filter action through optical demultiplexer 102, each road optical signal is still
Carry the ASE ambient noise light of one fixed width, such as Fig. 2（b）And Fig. 2（c）It is shown.Wherein Fig. 2（b）For optical demultiplexer 102
Filtering band logical curve on three channels, Fig. 2（c）It is optical signal through 102 filtered outgoing spectrum of optical demultiplexer, in channel light
The ASE ambient noise light of the visible one fixed width of surrounding.
To ensure that optical demultiplexer 102 is emitted the signal-to-noise ratio of optical signal, narrow band filter 105a, 105b, 105c and 105d
The outgoing optical signal of optical demultiplexer 102 is further filtered using narrower bandwidth, to filter out the ASE that each road optical signal carries
Ambient noise light, such as Fig. 2（d）And Fig. 2（e）It is shown.Wherein Fig. 2（d）For the filtering band logical curve of narrow band filter 105c, Fig. 2
（e）For the outgoing spectrum of narrow band filter 105c, it is seen that substantially without ASE ambient noise light around channel light.This filtering is clean
Channel light be emitted from narrow band filter module group 105, being separately directed to four photoelectricity through postposition coupled lens module group 103 visits
Module 104a, 104b, 104c and 104d are surveyed, is detected, the process of opto-electronic conversion, electric signal amplification and electric signal output.
As shown in figure 3, for the filtering of the front and back narrow band filter of narrow band filter feedback module modulation on third channel
Schematic diagram, the real-time monitoring photoelectric detection module 104a of narrow band filter feedback module 106a, 106b, 106c and 106d difference,
104b, 104c and 104d export the intensity value of electric signal, and record the maximum electrical signal intensity of four photoelectric detection modules respectively
Value Dmax10、Dmax20、Dmax30And Dmax40, feedback module 106a, 106b, 106c and 106d are recorded simultaneously at this time respectively filters narrowband
The modulation value T of wave device 105a, 105b, 105c and 105dmax10、Tmax20、Tmax30And Tmax40, this four modulation values make four respectively
The centre wavelength of narrow band filter some numerically, the centre wavelength of such as four narrow band filters at this time is respectively λT10、λT20、
λT30And λT40 。
When the device of multi-channel optical component is constituted or the factors such as environmental condition change, so as to cause four road light letters
Number centre wavelength drift about, and when deviateing the filter center wavelength of narrow band filter 105a, 105b, 105c and 105d (such as
Fig. 3（a1）Compared to Fig. 3（d1）It is shown), the light signal strength of narrow band filter 105a, 105b, 105c and 105d outgoing will become
Low (such as Fig. 3（e1）It is shown), eventually lead to the intensity value of photoelectric detection module 104a, 104b, 104c and 104d output electric signal
It will become smaller.Feedback module 106a, 106b, 106c and 106d monitor this variation, just to narrow band filter 105a, 105b, 105c
It is adjusted with the centre wavelength of 105d（Such as Fig. 3（d2）It is shown）.Feedback module 106a, 106b, 106c and 106d traversal modulation
Value Tmax10、Tmax20、Tmax30And Tmax40All values in the setting range of left and right, and record photoelectric detection module in this modulation range
104a, 104b, 104c and 104d export the intensity value of electric signal, finally compare and obtain the maximum electrical signal intensity value of new four
Dmax11、Dmax21、Dmax31And Dmax41And corresponding modulation value Tmax11、Tmax21、Tmax31And Tmax41, this modulation value is loaded respectively
Onto narrow band filter 105a, 105b, 105c and 105d, the filter center wavelength of four narrow band filters is made to become λT11、λT21、
λT31And λT41, this four filter center wavelength after overregulating are i.e. identical as the drift centre wavelength of tetra- road optical signals of Hou
(such as Fig. 3（d2）Relative to Fig. 3（a2）It is shown), it ensure that the optical signal of narrow band filter 105a, 105b, 105c and 105d outgoing
Intensity value maximum (such as Fig. 3（e2）It is shown).
It should be noted that feedback module 106a, 106b, 106c and 106d to narrow band filter 105a, 105b, 105c and
105d's is adjusted to mutually independent adjustment process.
Above-mentioned embodiment is only a preferred solution of the present invention, not the present invention is made in any form
Limitation, on the premise of not exceeding the technical scheme recorded in the claims also other variations and modifications.
Claims (8)
1. a kind of multi-channel optical receiving unit of integrated adjustable narrow band filter, including several light paths, preposition coupled lens, photodissociation
Multiplexer, postposition coupled lens module group and photoelectric detection module group, which is characterized in that
It further includes narrow band filter module group and narrow band filter feedback module group；
Optical signal is entered by the input terminals of the preposition coupled lens, and after through light path enter the optical demultiplexer, it is described
Optical demultiplexer output end separates n item light branches, and every light branch end is respectively by corresponding narrow band filter, corresponding postposition
Coupled lens are connected with corresponding photoelectric detection module, and n photoelectric detection module constitutes photoelectric detection module group, n postposition coupling
Close lens and constitute postposition coupled lens module group, the end of the photoelectric detection module with the narrow band filter feedback module
Electrical connection, the narrow band filter feedback module are electrically connected with corresponding narrow band filter, n narrow band filter feedback module structure
At narrow band filter feedback module group.
2. a kind of multi-channel optical receiving unit of integrated adjustable narrow band filter according to claim 1, which is characterized in that
The narrow band filter feedback module is used to control narrow band filter according to the voltage value that photoelectric detection module group exports
Power supply signal, including electric signal detector, microprocessor and memory, the electric signal detector and memory are and microprocessor
Device is electrically connected, and the microprocessor is electrically connected with the power supply signal control module of narrow band filter, and the electric signal detector is used
In the voltage value for obtaining the output of n photoelectric detection module, the microprocessor is used to control narrow-band filtering according to above-mentioned voltage value
The power supply signal of device.
3. a kind of multi-channel optical receiving unit of integrated adjustable narrow band filter according to claim 1 or 2, feature exist
In,
The tunable band-pass that the narrow band filter module group corresponds respectively to n item light branch optical signal centre wavelengths by n is filtered
Wave device is constituted.
4. a kind of multi-channel optical receiving unit of integrated adjustable narrow band filter according to claim 1 or 2, feature exist
In,
The photoelectric detection module is made of photodetector and preposition electric signal amplifier, is respectively used to opto-electronic conversion and telecommunications
Number amplification etc..
5. a kind of multi-channel optical receiving unit of integrated adjustable narrow band filter according to claim 1 or 2, feature exist
In,
The optical demultiplexer is prism optical demultiplexer, diffraction grating optical demultiplexer, waveguide optical grating optical demultiplexer and Jie
One kind in matter film optical demultiplexer.
6. a kind of multi-channel optical receiving unit of integrated adjustable narrow band filter according to claim 1 or 2, feature exist
In,
The narrow band filter module, postposition coupled lens module and photoelectric detection module are connected by free space light path.
7. a kind of multi-channel optical receiving unit of integrated adjustable narrow band filter according to claim 3, which is characterized in that
The narrow band filter module, postposition coupled lens module and photoelectric detection module are connected by free space light path.
8. a kind of multi-channel optical receiving unit of integrated adjustable narrow band filter according to claim 1 or 2, feature exist
In,
The narrow band filter feedback module group works according to the following steps：
A) n narrow band filter feedback module of narrow band filter feedback module group detects the photodetection of corresponding light branch respectively
Module exports the intensity value of electric signal, and records the maximum electrical signal intensity value of each photoelectric detection module, narrow-band filtering respectively
Device feedback module records the modulation value of each narrow band filter simultaneously, and n narrow band filter is operated in corresponding filter respectively at this time
In wave centre wavelength；
B) when the centre wavelength of some light tributary signal is drifted about, and deviate the filter center wavelength of corresponding narrow band filter
When, the light signal strength of narrow band filter outgoing will be lower, and eventually lead to corresponding photoelectric detection module output electric signal
Intensity value becomes smaller, and corresponding narrow band filter feedback module monitors this variation, just to the middle cardiac wave of corresponding narrow band filter
Length is adjusted, modulation value of corresponding narrow band filter of narrow band filter feedback module traversal step A records or so setting
All values in range, and the intensity value of corresponding photoelectric detection module output electric signal in this modulation range is recorded, finally compare
It relatively obtains new maximum electrical signal intensity value and corresponding modulation value, this modulation value is loaded into corresponding narrow band filter respectively
On, make the filter center wavelength shift of corresponding narrow band filter to the matched wavelength of light branch optical signal.
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| CN201810252289.4A CN108333689A (en) | 2018-03-26 | 2018-03-26 | A kind of multi-channel optical receiving unit of integrated adjustable narrow band filter |
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| CN201810252289.4A CN108333689A (en) | 2018-03-26 | 2018-03-26 | A kind of multi-channel optical receiving unit of integrated adjustable narrow band filter |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109981180A (en) * | 2019-03-15 | 2019-07-05 | 武汉电信器件有限公司 | A kind of wavelength locking optical module, device and wavelength locking method |
| US20200200875A1 (en) * | 2018-12-21 | 2020-06-25 | Continental Automotive Systems, Inc. | Wavelength adaptive narrow band optical filter for a lidar system |
| CN114244436A (en) * | 2021-12-17 | 2022-03-25 | 西安电子科技大学 | Adaptive matched filtering system of bandwidth variable light signal and matching method thereof |
-
2018
- 2018-03-26 CN CN201810252289.4A patent/CN108333689A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20200200875A1 (en) * | 2018-12-21 | 2020-06-25 | Continental Automotive Systems, Inc. | Wavelength adaptive narrow band optical filter for a lidar system |
| US11947038B2 (en) * | 2018-12-21 | 2024-04-02 | Continental Automotive Systems, Inc. | Wavelength adaptive narrow band optical filter for a LIDAR system |
| CN109981180A (en) * | 2019-03-15 | 2019-07-05 | 武汉电信器件有限公司 | A kind of wavelength locking optical module, device and wavelength locking method |
| US11770192B2 (en) | 2019-03-15 | 2023-09-26 | Wuhan Telecommunication Devices Co., Ltd | Wavelength locking optical module, device, and wavelength locking method |
| CN114244436A (en) * | 2021-12-17 | 2022-03-25 | 西安电子科技大学 | Adaptive matched filtering system of bandwidth variable light signal and matching method thereof |
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