CN108802901A - A kind of multifunctional light electric system of flexible bandwidth - Google Patents
A kind of multifunctional light electric system of flexible bandwidth Download PDFInfo
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- CN108802901A CN108802901A CN201810622682.8A CN201810622682A CN108802901A CN 108802901 A CN108802901 A CN 108802901A CN 201810622682 A CN201810622682 A CN 201810622682A CN 108802901 A CN108802901 A CN 108802901A
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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
- G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
- G02B6/12—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
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Abstract
The invention discloses a kind of multifunctional light electric systems of flexible bandwidth, including wide spectrum light source, the first photoswitch, optical circulator, the second photoswitch, tunable optical filter, third photoswitch and optical power detector；The first choice end of first photoswitch connects wide spectrum light source, and optical circulator tool is there are three port, and first end is connected to the common end of the first photoswitch, and second end is connected to the common end of the second photoswitch, and third end is connected to the common end of third photoswitch；Second photoswitch selects end to connect tunable optical filter；The first choice end of third photoswitch connects optical power detector.The present invention utilizes three photoswitches, and wide spectrum light source, TOF and optical power detector are integrated to form a multifunctional light electric system；By integrated so that system has the function of tunable optical source, spectroanalysis instrument function and adjustable light wave-filter function three zones；Functional configuration is carried out to system using photoswitch, has the advantages that switch speed is fast.
Description
Technical field
The invention belongs to technical field of optical fiber communication, more particularly, to a kind of multifunctional light electric system of flexible bandwidth.
Background technology
In Free Space Optics, photoswitch and optical circulator are common basic devices in fiber optic communication field.Light is opened
Being switched fast between capable of realizing light path is closed, there are commonly 12,2 X of X, 2 type photoswitches.Optical circulator can realize the non-of light path
Reciprocity is transmitted, and the light entered from port 1 will be exported from port 2, and the light entered from port 2 will be exported from port 3, according to this class
It pushes away.Usually used has three ports, two kinds of four ports light rings.Tunable optical filter (Tunable Optical
Filter, TOF) because it can leniently filter out the light of particular range of wavelengths in spectrum signal light, and by extensive use.In all optical network
In network, channel monitoring module can be built by TOF, the optical wavelength for needing to monitor can be filtered out from main line, to realize to spy
Determine the monitoring of channel.In tunable optical source, wide spectrum light source is tuned using TOF, is capable of the light source of selection target wavelength
Output.In practical applications, different in order to achieve the purpose that, tunable optical source is such as obtained, or to signal magic eye etc., need to purchase
Different equipment is set, purchase cost is substantially increased.
Invention content
In view of the drawbacks of the prior art, the purpose of the present invention is to provide a kind of multifunctional light electric system of flexible bandwidth,
Aim to solve the problem that in the prior art, since electro-optical system integrated level is not high, caused system function is single and due to system function
The slow-footed problem of function switch caused by removing connection different function block by hand is needed when switching.
The present invention provides a kind of multifunctional light electric systems of flexible bandwidth, including wide spectrum light source, the first photoswitch, the ring of light
Shape device, the second photoswitch, tunable optical filter, third photoswitch and optical power detector；The of first photoswitch
One selection end connects wide spectrum light source, and the second selection end of first photoswitch does not connect vacantly；There are three the optical circulator tools
Port, first end are connected to the common end of the first photoswitch, and second end is connected to the common end of the second photoswitch；Second light
The selection end of switch connects the tunable optical filter；The common end of the third photoswitch is connected to the optical circulator
Third end, the first choice end of the third optical circulator connects the optical power detector, the of the third photoswitch
Two selection ends do not connect vacantly；The wide spectrum light source is for providing wide spectrum light source；The tunable optical filter is used for signal
The bandwidth and centre wavelength of light are tuned；The optical power detector is used to detect the luminous power of output light.
Wherein, when system configuration different function according to demand, first photoswitch is selected wide by first choice end
Spectrum light source or the second selection end selection external light source are inputted, and input light passes through after the input of the first end of the optical circulator
The second end for crossing the optical circulator enters in second photoswitch, and second photoswitch is selected according to the wavelength of input light
Selection end corresponding with wavelength is selected to export to tunable optical filter；After tunable optical filter is tuned signal light
Reversely be input in the optical circulator, after by the three-polar output of optical circulator to third photoswitch；Third photoswitch root
The different function configured according to system is by signal light output to the optical power detector or from the second of the third photoswitch
Select end output.
Further, tunable optical filter includes：The fiber optic collimator unit that is successively set on optical axis expands and is
System, grating, collimation lens and three corner reflectors；The output of second photoswitch is after fiber optic collimator unit using beam-expanding system
It carries out expanding processing, grating carries out diffraction to the incident light after expanding, and diffraction light is after the processing of collimation lens collimation by institute
State backtracking after the tuning of three corner reflectors.
Further, three corner reflectors are realized by the movement parallel or perpendicular to diffraction light diffraction direction to input
The tuning of light, the centre wavelength of tuning signal light when it is moved along parallel direction, the tune when it is along movement in vertical direction
The bandwidth of humorous signal light.
Further, fiber optic collimator unit includes：First optical fiber collimator, the second optical fiber collimator and third optical fiber are accurate
Straight device；Second optical fiber collimator is arranged on optical axis, and the first optical fiber collimator and third optical fiber collimator are located at the second light
Fine collimator both sides, and respectively with optical axis at the first angle α1With the second angle α2。
The present invention is by the way that by wide spectrum light source, TOF, optical power detector is integrated together, and makes a multifunctional photoelectric system
System, switches over functional block using photoswitch, to carry out the configuration of function, with that switch speed is fast, stability is good is excellent
Point.Pass through integrating above-mentioned functional block so that system has the function of tunable optical source, spectroanalysis instrument function and tunable optical
Filter function three zones；Simultaneity factor is proposed using a kind of TOF of flexible bandwidth as system bandwidth adjustment module, should
TOF extends the tuning range of bandwidth, has the characteristics that bandwidth adjustment is flexible using three optical fiber collimators as input；It is comprehensive
The upper present invention has integrated level height, the feature that function is more, tuning bandwidth is flexible.
Description of the drawings
Fig. 1 is a kind of structural schematic diagram of the multifunctional light electric system of flexible bandwidth provided in an embodiment of the present invention；
Fig. 2 be a kind of flexible bandwidth provided in an embodiment of the present invention multifunctional light electric system in be made of three sub-bands
TOF tuning range schematic diagrames；
Fig. 3 be a kind of flexible bandwidth provided in an embodiment of the present invention multifunctional light electric system in tri- corner reflectors of TOF
Operating diagram, (a) are to be moved perpendicular to diffraction direction, are (b) to be parallel to diffraction direction movement；
Fig. 4 is the photoswitch connection figure provided in an embodiment of the present invention when being configured to tunable optical source function；
Fig. 5 is the photoswitch connection figure provided in an embodiment of the present invention when being configured to spectroanalysis instrument function；
Fig. 6 is adjustable light wave-filter function light switch connection figure provided in an embodiment of the present invention.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
The present invention provides a kind of multifunctional light electric systems of flexible bandwidth, are mainly used in fiber optic communication, Fibre Optical Sensor
With the fields such as test instrumentation；The present invention can solve that existing equipment integrated level is low, single equipment function is few, bandwidth is inflexible asks
Topic.
Fig. 1 shows a kind of structure of the multifunctional light electric system of flexible bandwidth provided in an embodiment of the present invention, in order to just
In explanation, illustrate only with the relevant part of the embodiment of the present invention, details are as follows：
The multifunctional light electric system of flexible bandwidth proposed by the present invention, including：Wide spectrum light source 1, the first photoswitch 2, the ring of light
Shape device 3, the second photoswitch 4, tunable optical filter (TOF) 5, third photoswitch 6 and optical power detector 7；First light is opened
The first choice end for closing 2 connects wide spectrum light source 1, and the second selection end of the first photoswitch 2 does not connect vacantly；Optical circulator 3 has three
A port, first end are connected to the common end of the first photoswitch 2, and third end is connected to the common end of third photoswitch 6；Third light
The first choice end of switch 6 connects optical power detector 7, and the second selection end of third photoswitch 6 does not connect vacantly；Second photoswitch
4 common end is connected to the second end of optical circulator 3, the selection end connection tunable optical filter (TOF) of the second photoswitch 4
5；Wide spectrum light source 1 is for providing wide spectrum light source；TOF5 is for being tuned signal light；Optical power detector 7 is for detecting light
Power；According to demand when system configuration different function, the first photoswitch 2 from first choice end selects wide spectrum light source 1 or from the
One photoswitch 2 second selection end selection external light source input, by optical circulator 3 first end input, after by ring of light shape
The second end of device 3 enters in the second photoswitch 4, and the second photoswitch 4 selects end to input according to the wavelength selection difference of input light
TOF5；TOF5 is after being tuned signal light in reversed input optical circulator 3；Afterwards by the third end of optical circulator 3 input the
Three photoswitches 6；The different function that third photoswitch 6 is configured according to system, by signal light output to optical power detector 7 or
It is exported from the second selection end of third photoswitch 6.
Wherein, tunable optical filter (TOF) 5 includes：Fiber optic collimator unit 51, beam-expanding system 52, grating 53, collimation
Lens 54 and three corner reflectors 55；Fiber optic collimator unit 51, beam-expanding system 52, grating 53, collimation lens 54 and three corner reflectors
55 are sequentially located on the optical axis of TOF；Fiber optic collimator unit 51 is used for the input/output of TOF5 signal lights；Beam-expanding system 52 is used for
Input/output light is carried out to expand/shrink beam；Grating 53 carries out diffraction to incident light；Collimation lens 54 is used to carry out diffraction light
Collimation processing；Three corner reflectors 55 are tuned input light, put down by being parallel and perpendicular to the movement of diffraction light diffraction direction
The centre wavelength of tuning signal light when line direction moves, the bandwidth of tuning signal light when vertical movement.
In embodiments of the present invention, fiber optic collimator unit 51 includes：First optical fiber collimator 511, the second optical fiber collimator
512 and third optical fiber collimator 513；Second optical fiber collimator 512 is located on TOF optical axises, the first optical fiber collimator 511 and third
Optical fiber collimator 513 is located at 512 both sides of the second optical fiber collimator, and with optical axis at angle α1、α2, for changing incident light
With the angle of TOF optical axises；The angle makes diffraction of the centre wavelength of the tuning sub-band of three different wave lengths after grating
Angle is identical, which can be expanded multiple by three different modulator band center wavelength and beam-expanding system 52 and calculate and obtain.Three
A sub- band signal light is respectively with inclination angle i1、i2、i3It is incident on grating, in respective diffraction light wave, centre wavelength is respectively
λ1c、λ2c、λ3cLight beam, the angle of diffraction is respectively θ1c、θ2c、θ3c, according to grating diffration characteristic, there are following relational expression (1)
(2)(3)：
d(sinθ1c+sini1)=λ1c (1)
d(sinθ2c+sini2)=λ2c (2)
d(sinθ3c+sini3)=λ3c (3)
By designing screen periods d and selection incidence angle i1、i2、i3, can allow diffraction angle1c=θ2c=θ3c=θc, also
It is to say, with angle i1、i2、i3Incident, wavelength is respectively λ1c、λ2c、λ3cLight beam, diffraction direction is identical.Beam-expanding system 52
It is β to expand multiple, then the angle of the first optical fiber collimator 511 and third optical fiber collimator 513 and optical axis is respectively by formula (4)
(5) it obtains.
α1=arctan (β tan (i1-i2)) (4)
α2=arctan (β tan (i3-i2)) (5)
Wherein, the first optical fiber collimator 511, the second optical fiber collimator 512, third optical fiber collimator 513 make three differences
The tuning sub-band of wavelength is incident on different angle timesharing on grating, obtains the tuning sub-band of three different wave lengths, and three
A sub-band constitutes whole tuning ranges of the TOF.
The multifunctional light electric system of flexible bandwidth can be configured to tunable optical source function, spectroanalysis instrument function and tunable
Optical filter function.
Multifunctional light electric system can be adjusted the second photoswitch 4 and select end according to the difference of tuning sub-band in the present invention
Select one in the first optical fiber collimator 511 of connection, the second optical fiber collimator 512 or third optical fiber collimator 513 to TOF5
It is inputted.
TOF5 in the present invention in multifunctional light electric system is according to the centre wavelength of target output light and the difference of range, control
Movement of three corner reflectors 55 in parallel and vertical raster diffraction direction in TOF5 processed, to realize tunning effect.
When the multifunctional photoelectric system configuration of flexible bandwidth is at tunable optical source function in the present invention, the choosing of the first photoswitch 2
End selection wide spectrum light source 1 is selected, according to the sub-band where target light, selects a pair at three selection ends in the second photoswitch 4
TOF5 is inputted, according to required target light, tuning signal light when being moved by three corner reflectors, 55 parallel direction of TOF5
Centre wavelength, the bandwidth of tuning signal light is tuned output to signal light when vertical movement, and third photoswitch 6 selects the free time
Select end output；When work, the signal light of wide spectrum light source 1 enters the first end of optical circulator 3 by the first photoswitch 2, from light
The second end of circulator 3 exports, and enters in TOF5 via the second photoswitch 4 and tunes, and the second of rear reversed input optical circulator 3
Tunable optical source work(is realized in end from the three-polar output of optical circulator 3 via the second selection end output of third photoswitch 6
Energy.
When the multifunctional photoelectric system configuration of flexible bandwidth provided in an embodiment of the present invention is at spectroanalysis instrument function, first
Photoswitch 2 selects the idle selection end of end selection, according to the sub-band where target light, selects three choosings in the second photoswitch 4
A pair of the TOF5 for selecting end is inputted, according to required target light, when being moved by three corner reflectors, 55 parallel direction of TOF5
The centre wavelength of tuning signal light, the bandwidth of tuning signal light is tuned output third photoswitch to signal light when vertical movement
6 selection ends select optical power detector 7；When work, external input light source is inputted via the idle selection end of the first photoswitch 2,
It into the first end of optical circulator 3, is exported from the second end of optical circulator 3, enters in TOF5 via the second photoswitch 4 and tune,
The reversed second end of input optical circulator 3 afterwards, from the three-polar output of optical circulator 3, via third photoswitch 6 into optical power
It is detected in detector 7, realizes spectroanalysis instrument function.
The multifunctional photoelectric of flexible bandwidth provided in an embodiment of the present invention sets system configuration into adjustable light wave-filter function
When, the first photoswitch 2 selects selection idle selection end in end to be selected in the second photoswitch 4 according to the sub-band where target light
A pair of TOF5 at three selection ends is inputted, and according to required target light, passes through three corner reflectors, 55 parallel direction of TOF5
The centre wavelength of tuning signal light when movement, the bandwidth of tuning signal light is tuned output to signal light when vertical movement, and
Three photoswitches 6 select the idle end of end selection；When work, external input light source is inputted through the first photoswitch 2, into optical circulator 3
First end, exported from the second end of optical circulator 3, enter in TOF5 via second port photoswitch 4 and tune, rear reversed input
The second end of optical circulator 3, it is real via the idle selection end output of third photoswitch 6 from the three-polar output of optical circulator 3
Existing adjustable light wave-filter function.
The present invention proposes a kind of multifunctional light electric system of flexible bandwidth, is made using the TOF of a ultra-wide tuning range
For tuning device, the devices such as wide spectrum light source, optical power detector are switched over using photoswitch, multiple functions are integrated into
Together, to improve the integrated level of system, the multifunctionality of equipment is increased.
As shown in Figure 1, the multifunctional light electric system of flexible bandwidth provided in an embodiment of the present invention includes：Wide spectrum light source 1,
One photoswitch 2, optical circulator 3, the second photoswitch 4, TOF5, third photoswitch 6 and optical power detector 7.Wherein：Wide spectrum light source
1 is connected to a selection end of the first photoswitch 2；Port one, port two and the port three of optical circulator 3 are separately connected the first light
Switch 2, the second photoswitch 4 and third open the light 6 common end；The selection end of second photoswitch 4 is connected to TOF5；Third photoswitch
A 6 selection end is connected to optical power detector 7.TOF5 includes：Fiber optic collimator unit 51, beam-expanding system 52, grating 53, standard
54 and three corner reflector 55 of straight lens；Fiber optic collimator unit 51, beam-expanding system 52, grating 53, collimation lens 54 and three corner reflections
Mirror 55 is sequentially located on the optical axis of TOF；Fiber optic collimator unit 51 is used for the input/output of TOF signal lights；Beam-expanding system 52 is used for
Input/output light is carried out to expand/shrink beam；Grating 53 carries out diffraction to incident light；Collimation lens 54 is used for the collimation of diffraction light；
Three corner reflectors 55 are tuned input light by being parallel and perpendicular to the movement of diffraction light diffraction direction.
As shown in Fig. 2, making via the first optical fiber collimator 511, the second optical fiber collimator 512, third optical fiber collimator 513
Three different wave length λ1、λ2And λ3Tuning sub-band be incident on grating with different angle timesharing, the angle make three not
The central wavelength lambda of the tuning sub-band of co-wavelength1c、λ2cAnd λ3cAngle of diffraction after grating is identical.To obtain three not
Whole tuning ranges of the tuning sub-band of co-wavelength, the TOF constitute λ by three sub-bands1+λ2+λ3。
As shown in figure 3, three corner reflectors 55 can the movement of parallel or vertical raster diffraction direction, to be carried out to signal light
Tuning.As shown in Fig. 3 (b), when three corner reflectors 55 are parallel to diffraction direction movement, can to the centre wavelength of target light into
Row is adjusted；As shown in Fig. 3 (a), when three corner reflectors 55 are moved perpendicular to diffraction direction, the bandwidth of target light is adjusted
Section.
As shown in figure 4, when the multifunctional photoelectric system configuration of flexible bandwidth of the present invention is at tunable optical source function, the first light
Switch 2 selects end that wide spectrum light source 1, third photoswitch 6 is selected to select the idle end of end selection, the wide range signal that wide spectrum light source 1 provides
Light is after the first photoswitch 2, into the port 1 of optical circulator, is incident on the second light via the second end of optical circulator 3 and opens
In closing 4, after be input in TOF5 and tune, then the reversed port 2 of input optical circulator 3, exports from the port of optical circulator 33,
It is output to the output of hanging selection end via third photoswitch 6, realizes tunable optical source function.
As shown in figure 5, the multifunctional photoelectric system configuration of flexible bandwidth provided in an embodiment of the present invention is at spectroanalysis instrument
When function, the first photoswitch 2 selects the idle end of end selection, third photoswitch 6 that end is selected to select optical power detector 7, outside letter
Number light is after the input of the hanging selection end of the first photoswitch 2, into the port 1 of optical circulator, via the of optical circulator 3
Two ends are incident in the second photoswitch 4, after be input in TOF5 and tune, the then reversed port 2 of input optical circulator 3, from light
The port 3 of circulator 3 exports, and via in 6 Output optical power detector 7 of third photoswitch, realizes spectroanalysis instrument function.
As shown in fig. 6, the multifunctional photoelectric system configuration of flexible bandwidth provided by the invention is at adjustable light wave-filter work(
Can when, the first photoswitch 2 selects the end idle end of selection, and third photoswitch 6 selects the idle end of end selection, and external signal light is by the
After the hanging selection end input of one photoswitch 2, into the port 1 of optical circulator, it is incident on via the second end of optical circulator 3
In second photoswitch 4, after be input in TOF5 and tune, the then reversed port two of input optical circulator 3, from optical circulator 3
Port three exports, and is output to the output of hanging selection end via third photoswitch 6, realizes adjustable light wave-filter function.
As it will be easily appreciated by one skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention, not to
The limitation present invention, all within the spirits and principles of the present invention made by all any modification, equivalent and improvement etc., should all include
Within protection scope of the present invention.
Claims (5)
1. a kind of multifunctional light electric system of flexible bandwidth, which is characterized in that including wide spectrum light source (1), the first photoswitch (2),
Optical circulator (3), the second photoswitch (4), tunable optical filter (5), third photoswitch (6) and optical power detector (7)；
The first choice end connection wide spectrum light source (1) of first photoswitch (2), the second selection of first photoswitch (2)
End does not connect vacantly；
For optical circulator (3) tool there are three port, first end is connected to the common end of the first photoswitch (2), the connection of third end
To the common end of third photoswitch (6)；
The first choice end of the third photoswitch (6) connects the optical power detector (7), the third photoswitch (6)
Second selection end does not connect vacantly；
The common end of second photoswitch (4) is connected to the second end of the optical circulator (3), second photoswitch (4)
Selection end connect the tunable optical filter (5)；
The wide spectrum light source (1) is for providing wide spectrum light source；The tunable optical filter (5) is used for the bandwidth to signal light
It is tuned with centre wavelength；The optical power detector (7) is used to detect the luminous power of output light.
2. multifunctional light electric system as described in claim 1, which is characterized in that when system configuration different function according to demand
When, first photoswitch (2) selects wide spectrum light source (1) or the second selection end that external light source is selected to carry out by first choice end
Input, input light enter after the input of the first end of the optical circulator (3) by the second end of the optical circulator (3)
In second photoswitch (4), second photoswitch (4) is defeated according to the wavelength selection selection end corresponding with wavelength of input light
Go out to tunable optical filter (5)；Tunable optical filter (5) is reversely input to the light after being tuned to signal light
In circulator (3), after by the three-polar output of optical circulator (3) to third photoswitch (6)；Third photoswitch (6) is according to being
The configured different function of system is by signal light output to the optical power detector (7) or from the of the third photoswitch (6)
Two selection end outputs.
3. multifunctional light electric system as described in claim 1, which is characterized in that tunable optical filter (5) includes：Successively
Fiber optic collimator unit (51), beam-expanding system (52), grating (53), collimation lens (54) and three corner reflectors being arranged on optical axis
(55)；
The output of second photoswitch (4) after the fiber optic collimator unit (51) using the beam-expanding system (52) into
Row expands processing, and grating (53) carries out diffraction to the incident light after expanding, and diffraction light is after the processing of collimation lens (54) collimation
The backtracking after the tuning of three corner reflector (55).
4. multifunctional light electric system as claimed in claim 3, which is characterized in that three corner reflector (55) by parallel or
The tuning to input light is realized perpendicular to the movement of diffraction light diffraction direction, the tuning signal when it is moved along parallel direction
The centre wavelength of light, the bandwidth of tuning signal light when it is along movement in vertical direction.
5. multifunctional light electric system according to any one of claims 1-4, which is characterized in that fiber optic collimator unit (51) wraps
It includes：First optical fiber collimator (511), the second optical fiber collimator (512) and third optical fiber collimator (513)；
Second optical fiber collimator (512) is arranged on the optical axis, first optical fiber collimator (511) and the third
Optical fiber collimator (513) is located at the second optical fiber collimator (512) both sides, and respectively with the optical axis at the first angle
α1With the second angle α2。
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