CN102970073A - Device and system for optical performance monitoring - Google Patents
Device and system for optical performance monitoring Download PDFInfo
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- CN102970073A CN102970073A CN2011102590086A CN201110259008A CN102970073A CN 102970073 A CN102970073 A CN 102970073A CN 2011102590086 A CN2011102590086 A CN 2011102590086A CN 201110259008 A CN201110259008 A CN 201110259008A CN 102970073 A CN102970073 A CN 102970073A
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Abstract
The invention provides a device and a system for optical performance monitoring. The device comprises a light beam input end used for inputting multi-band light beams, at least one collimation unit used for collimating and focusing light beams on a light receiving unit and a dispersion unit arranged between the collimation unit and the light receiving unit. The collimation unit collimates the input light beams to the dispersion unit to enable the dispersion unit to effectively diffract the light beams and converge the diffracted light beams on the light receiving unit. The device further comprises a micro-electro mechanical system (MEMS) reflector which is used for reflecting the light beams of the dispersion unit back to the dispersion unit. A rotatable reflector is rotated to change incidence angle of the dispersion unit to enable receiving elements on the receiving unit to continuously scan spectrum power in the corresponding sub bands. Due to the fact that the device achieves the effect that each detection unit on the light detection unit can scan spectrum of the sub bands by changing grating incidence angle or moving a light detection unit, spectrum detection resolution is improved, the number of detection units is reduced, and the device and the system are high in scanning speed and low in cost.
Description
Technical field
The present invention relates to a kind of optical property supervising device, and further relate to a kind of system and device for a plurality of photon wave band performances of scanning monitor optical transmission.
Background technology
In order to satisfy the demand that increases message capacity in the optical communication, often adopt the communication means of practical wavelength-division multiplex technique, it can increase message capacity by utilizing exactly existing optical cable.Wavelength division multiplexing with less multiplexing optical frequency interval of approximate 100GHz is called compact wavelength division multiplexing (DWDM).
The light supervising device is used for grasping the state of each channel and will increasing a large amount of spectrum branch optical filtering in this equipment at multiplexing optical signal, for example, utilizes them to control fiber amplifier.Existing a plurality of technical staff pointed out, diffraction grating is the spectroscopy components that is applicable to this function, and once disclosed and a kind ofly divided formwork with the diffraction grating 53 shown in Fig. 1 a and integrally combining of photo-detector 54 as spectrum, as shown in Figure 1a: will also change into directional light through the light beam of wavelength division multiplexing from optical fiber 52 emissions by collimater 51, and be incident on the diffraction grating 53, carry out frequency division by 53 pairs of these light beams of diffraction grating, and the shooting angle emission to change according to wavelength.The light beam of emission passes through collimating lens 55 again, thereby forms focused beam luminous point groups at photodetector array 54. and each photo-detector 541 in the photodetector array 54 is arranged on the position of focused beam luminous point group of the light with each wavelength (wave band).
Like this, suppose that the order of diffraction grating of reflection is m, the grating cycle is that d and the wavelength that uses are λ, uses θ
iExpression is used θ by the lip-deep normal that is formed with diffraction grating on it and angle that incident beam forms
mThe angle that expression has the emission light beam to form, the equation below then satisfying.
sinθ
i±sinθ
m＝mλ/d (1)
Work as θ
iBe constant and when changing wavelength by Δ λ, providing the distance that light beam arrives at diffraction grating by following equation is the change in location Δ x of the optical receiving surface of L place setting.Draw Arithmetic Expressions Using (2)
Δx＝(Lm/(d*cosθ
0))*Δλ
Wherein, represent θ in the equation 1
i=θ
mSituation.At θ
i≠ θ
0Situation under usually also can set up top equation.Therefore, if the wavelength interval is constant, arrange at regular intervals a plurality of photo-detectors, so that but the position of photo-detector and wavelength (each channel) are mutually corresponding one to one.
Shown in Fig. 1 b: conventional normal optical detector array PD1, PD2, PD3...PDn have constant spacing between photo-detector.Photodetector array PD1, PD2, PD3...PDn only survey sub-band λ like this
1, λ
2,λ
3... .. λ
nThe light beam of fixed wave length, and can not the spectrum of each sub-band be scanned, thereby causes optical spectrum monitor resolution low, and if satisfy whole wave band scanning, and need the continuous spectrum place to be provided with photo detector array, thereby increase its cost and volume.
And the structure of the tunable filter of prior art (TF) as shown in Figure 2: this adjustable light wave-filter 70 comprises signal input part 713, signal output part 711, concentrating element 73, grating 75 and a speculum 77, be converted to parallel optical signal from the light signal of signal input part 713 inputs through concentrating element 73, this parallel optical signal is injected grating 75 surfaces behind grating 75 diffraction, injects speculum 717, after speculum 77 reflections, return by former road, and finally input to signal output part 711.By rotating grating 75 or speculum 77, make its this light signal be input to last entering signal output 711 from signal input part 713, grating 75 is passed through twice in the centre.Existing tunable filter is the selectable channel signal light of signal output part 711 outputs by continuous rotating shutter 75 or speculum 77.
And tunable filter receives by the channel that grating or speculum significantly rotate the selection different wave length.To make this anglec of rotation large and utilize this Filter Principle to be made into the optical property supervising device, and the scan period is longer, respective response speed is slower.
Summary of the invention
The invention provides one and improve spectral detection resolution, low cost and fast light supervisory control system and the device of sweep speed.
In order to realize described purpose, a kind of optical property supervisory control system comprises that one is loaded with the input of multiple wavelet section, utilize the be coupled flashlight of this optical fiber input of an optical coupler to be separated to supervisory control system, described supervisory control system comprises: a Multiplexing apparatus inputs to a supervising device with a small amount of light beam that optical coupler separates, and comprises that an input beam termination folds the light beam of electro-optical device input; One light receiving unit is for detection of whole wave band light beam, the collimation unit with beam collimation, focus on the described light receiving unit; Throwaway of the same colour unit places between input beam end and the collimation unit and isolates the sub-band light beam; Communication is connected one data processing unit with light receiving unit; And one display unit communication is connected with data processing unit, it is characterized in that: native system can make each receiving element spectral power in each corresponding sub-band of continuous sweep respectively on the receiving element by changing dispersion unit incidence angle or mobile light receiving element.
Wherein, preferred version is: described mobile reception unit is mobile at the party face of collimation focal element.
Wherein, preferred version is: described dispersion unit is transmission-type grating or reflective gratings.
Wherein, preferred version is: the volume phase grating of described transmission-type grating for being comprised of high efficiency DCG material.
Wherein, preferred version is: described light receiving element is that a plurality of monitor diode arrays form.
The present invention comprises that also a kind of optical property supervising device comprises input beam end input multiband light beam; At least one collimation unit with beam collimation, focus on the light receiving unit; Throwaway of the same colour unit places between collimation unit and the light receiving unit, described input multiband light beam, input beam is collimated to the dispersion unit in described collimation unit so that the effective diffracted beam in dispersion unit, and described diffracted beam is converged on the light receiving unit, it is characterized in that: this device can make each receiving element spectral power in each corresponding sub-band of continuous sweep respectively on the receiving element by changing dispersion unit incidence angle or mobile light receiving element.
Wherein, preferred version is: this device also comprises a rotary reflector with the beam reflection color reversion throwaway unit of dispersion unit, and rotation rotary reflector change dispersion unit incidence angle makes the interior spectral power of each receiving element difference each corresponding sub-band of continuous sweep on the receiving element.Described rotary reflector is the MEMS speculum.
The invention has the advantages that: because the present invention adopts each detecting element that changes on grating incidence angle or the mobile photo detecting unit realization photo detecting unit can scan the spectrum of each sub-band, thereby not only improve the resolution of spectral detection, reduce the quantity of the probe unit on the probe unit, reduce cost and make sweep speed fast owing to only scanning in the sub-band interval.
Description of drawings
Below in conjunction with drawings and Examples light channel structure of the present invention is further specified.
Fig. 1 a is the structure principle chart of the optical property watch-dog of prior art.
Fig. 1 b is the monitoring spectrum schematic diagram of the optical property watch-dog of prior art.
Fig. 2 is the structure principle chart of the optic tunable filter of prior art.
Fig. 3 is the structure principle chart of the first embodiment of a kind of optical property supervising device of the present invention and system.
Fig. 3 a is the partial enlarged drawing of the first embodiment of a kind of optical property supervising device of the present invention and system.
Fig. 3 b is the sub-band monitoring schematic diagram of a kind of optical property supervising device of the present invention.
Fig. 4 a is the structure principle chart of the second embodiment of a kind of optical property supervising device of the present invention and system.
Fig. 4 b is the partial enlarged drawing of the second embodiment of a kind of optical property supervising device of the present invention and system.
Fig. 5 a is the structure principle chart of the 3rd embodiment of a kind of optical property supervising device of the present invention and system.
Fig. 5 b is the partial enlarged drawing of the 3rd embodiment of a kind of optical property supervising device of the present invention and system.
Fig. 6 is the structure principle chart of the 4th embodiment of a kind of optical property supervising device of the present invention and system.
Embodiment
Be described further below in conjunction with the operation principle of accompanying drawing to optical property supervising device of the present invention and system.
Fig. 3 is the structure principle chart of the first embodiment of a kind of optical property supervising device of the present invention and system, as shown in Figure 3: described smooth supervisory control system 10 comprises that the signal that utilizes an optical coupler or optical splitter 11 will part to be used for monitoring is separated to supervisory control system 12 from the main signal of communication stream of main fiber, described optical splitter 11 comprises that an input 111 receives the main signal of communication stream on the main fiber, one first output 112 distributes most of light beam of main signal luminous energy to continue on for the communication of main trunk road by described optical splitter 11, and the second output 113 distributes the light signal that is loaded with on a small quantity the multiband wavelength to be used for monitoring by described optical splitter 11.
Described supervisory control system 10 also comprises: a Multiplexing apparatus 13 has the small part light signal that first input end 131 receives 113 outputs of described the second output, and the second input 132 and output 133; Wherein, described the second input 132 receives the calibrating signal that calibrating signal generation module 14 produces, and one supervising device 15 have an input beam end 151, the small part multiple wavelet section pilot signal of described Multiplexing apparatus 13 coupling first input ends 131 inputs and the calibration beam of the second input 132 inputs input to input beam end 151.
Described supervising device 15 comprises: input beam end 151 is inputted as mentioned above light beam; One photodetection unit 152 can be comprised of a plurality of monitor diode arrays, first lens 153, the second lens 154 with beam collimation, focus on the described photo detecting unit 152; One transmission-type grating 155 especially is the volume phase grating (VPG) that is comprised of high efficiency DCG material, and described diffraction grating 155 places between first lens 153 and the second lens 154; One data processing unit 156 receives is connected communication by data wire 157 and connects with photo detecting unit; And one display unit 158 are connected communication with data processing unit by data wire 159 and connect.
Wherein, described the second lens 154 can omit, and can converge on each optical detection device of photo detecting unit 152 by diffraction grating 155.
Wherein, the angle that the lip-deep normal of the diffraction grating of described volume phase grating 155 and incident beam form, the angle that represents to have the formation of emission light beam with θ, described volume phase grating 155 converges at light beam on the photo detecting unit 152 by the second lens 154 after the space is separated into different sub-band light beams, wherein, described first lens 153 and the second lens 154 preferred design are in wave-length coverage, and described the second lens 154 have the face that the face of converging forms corresponding to each detecting element on the photo detecting unit 152.
Wherein, described transmission-type grating 155 comprises at least one substrate and a diffraction surfaces, and described grating 155 comprises that first substrate 155a, second substrate 155b and a diffraction element 155c are deposited between first and second substrate.First substrate 155a and second substrate 155b can be comprised of low diffusion glass material, and its surface is coated with anti-reflection film and improves the percent of pass of light beam.In the present embodiment, this diffraction element 155c comprises that a volume phase grating makes the incident beam of different angles be diffracted into the output of different wave length bundle, described diffraction element 155c comprises that especially a holographic element has a sensitization material, can provide the material of volume hologram such as photosensitive polymer or DCG ((bichromate gelatin)) etc.
Described photo detecting unit 152 becomes the signal of telecommunication with the light energy conversion of each optical detection device, receive and read by data processing unit 156 afterwards, shown by display unit 158 again, wherein, this material manufacturing to the light beam wavelength sensitivity of the available GaAs of each detecting element on the photo detecting unit 152.Described data processing unit 156 can make the data processing module of prior art, such as the A/D converter.
The operation principle of present embodiment is: 151 emissions of input beam end are loaded with the multiband light beam, and input beam is collimated to grating 155 to first lens 153 so that the effective diffracted beam of grating.Described the second lens 154 receive the diffracted beam of grating 155 outgoing, and described diffracted beam is converged on each detecting element of the photo detecting unit 152 on the focusing surface of the second lens 154, like this, the light beam of different-waveband can be converged on each corresponding detecting element of photo detecting unit 152 by the second lens 154.
Wherein, being provided with behind the light beam that collimating optical fibre array (not shown) receives each wave band each detecting element by photo detecting unit 152 before the described photo detecting unit 152 receives and surveys.
Fig. 3 a is the partial enlarged drawing of miniaturization light watch-dog of the present invention, and shown in Fig. 3 a: present embodiment grating 155 is by clockwise rotating d θ i, and then incidence angle increases d θ i, and wherein corresponding angle of diffraction variable quantity is d θ m, because the grating equation formula is: nd (Sin θ
i+ Sin θ
m)=m λ can get equation (3) to the differentiate of grating equation both sides like this,
Can get according to geometric optics knowledge, wherein, f represents the focal length of the second lens 154, and like this, the light beam of described sub-band is at the position shifted by delta x that photo detecting unit 152 detects,
Present embodiment can satisfy the quantity that reduces the detecting element on the photo detecting unit 152 by rotating shutter 155, and shown in Fig. 3 b: for example, prior art needs detecting element to comprise detection sub-band (Sub-Band) λ
1, λ
2,λ
3... .. λ
nN detecting element monitoring grating 155 isolated sub-band λ
1, λ
2,λ
3... .. λ
nN sub-band, detecting element PD1, PD2 on the photo detecting unit 152, PD3...PDn be the corresponding light beam that receives sub-band λ 1, λ 2, λ 3..... λ n respectively, formula (4) rotates very little angle d θ i as described, shifted by delta x, thereby make detecting element on the photo detecting unit 152 can scan the light beam of each sub-band (Sub-Band), shown in Fig. 3 b: sub-band can be along with rotating shutter 155, and detecting element PD1, the PD2 on the photo detecting unit 152, PD3...PDn are respectively to sub-band λ
1,λ
2, λ
3... .. λ
nLight beam scan, shown in Fig. 3 b, detecting element PD1 is λ to centre wavelength
1The light beam of wave band is from starting point λ
11To end point λ
12Carry out this sub-band spectral scan, same, detecting element PD2 is λ to centre wavelength
2The light beam of wave band is from starting point λ
21To end point λ
22Carry out this sub-band spectral scan, by that analogy, detecting element PDn is λ to centre wavelength
nThe light beam of wave band is from starting point λ
N1To end point λ
N2Carry out this sub-band spectral scan.Can design like this quantity of the detecting element PD of limited quantity, and by the very little angle of deflection grating 155, realize full sub-band monitoring scanning, so not only improve the resolution of spectral detection, sweep speed is fast, and cost is low.
Fig. 4 a is the second embodiment of optical property supervising device of the present invention, shown in Fig. 4 a: as described in supervising device 40 comprise: input beam end 41 input is loaded with the multi-wave signal light beam; One photodetection unit 42 can be comprised of a plurality of monitor diode arrays, first lens 43, the second lens 44 with beam collimation, focus on the described photo detecting unit 42; Described reflective gratings 45 places the light path between first lens 43 and the second lens 44; One data processing unit 46 receives is connected communication by data wire 47 and connects with photo detecting unit; And one display unit 48 are connected communication with data processing unit by data wire 49 and connect.
Wherein, described reflective gratings 45 comprises a substrate and a diffraction surfaces, described reflective gratings 45 comprises substrate 45a and a diffraction element 45b, described diffraction element 45b is deposited on the substrate 45a, the described substrate 45a back side is coated with high-reflecting film and improves the reflectivity of light beam, described photo detecting unit 42 becomes the signal of telecommunication with the light energy conversion of each optical detection device, receive and read by data processing unit 46 afterwards, shown by display unit 48 again, wherein, this material manufacturing to the light beam wavelength sensitivity of the available GaAs of each detecting element on the photo detecting unit 42.Described data processing unit 46 can make the data processing module of prior art, such as the A/D converter.
The light path principle of this embodiment is: input beam end 41 emission is loaded with the multiband light beam of multi-wavelength, first lens 43 input beam is collimated to grating 45 in case the effective diffracted beam back reflection of grating out.Described the second lens 44 receive the diffracted beam of grating 45 outgoing, and described diffracted beam is converged on each detecting element of the photo detecting unit 42 on the focusing surface of the second lens 44, like this, by the second lens 44 the different wave length bundle is converged on each corresponding detecting element of photo detecting unit 42.
Shown in Fig. 4 a: present embodiment grating 45 is by clockwise rotating d θ
i, then incidence angle increases d θ
i, wherein corresponding angle of diffraction variable quantity is d θ
m, like this, according to grating equation formula: nd (Sin θ
i-Sin θ
m)=m λ.Can get equation (5) to the differentiate of grating equation both sides,
Can get according to geometric optics knowledge, wherein, f represents the focal length of the second lens 44, and like this, the light beam of described sub-band detects to get position shifted by delta x at photo detecting unit 42,
Present embodiment is shown in Fig. 4 b: for example, prior art needs detecting element to comprise detection sub-band (Sub-Band) λ
1, λ
2,λ
3... .. λ
nN detecting element monitoring grating 45 isolated sub-band λ
1, λ
2,λ
3... .. λ
nN sub-band, detecting element PD1, the PD2 on the photo detecting unit 42, PD3...PDn be the corresponding sub-band λ that receives respectively
1, λ
2,λ
3... .. λ
nLight beam, formula (6) rotates very little angle d θ i as described, shifted by delta x, thereby make detecting element on the photo detecting unit 42 can scan the light beam of each sub-band (Sub-Band), shown in Fig. 4 b: sub-band can be along with rotating shutter 45, and detecting element PD1, the PD2 on the photo detecting unit 42, PD3...PDn are respectively to sub-band λ
1,λ
2, λ
3... .. λ
nLight beam scan, shown in Fig. 3 b, as wherein, detecting element PD1 is λ to centre wavelength
1The light beam of wave band is from starting point λ
11To end point λ
12Carry out this sub-band spectral scan, same, detecting element PD2 is λ to centre wavelength
2The light beam of wave band is from starting point λ
21To end point λ
22Carry out this sub-band spectral scan, by that analogy, detecting element PDn is λ to centre wavelength
nThe light beam of wave band is from starting point λ
N1To end point λ
N2Carry out this sub-band spectral scan.Can design like this quantity of the detecting element PD of limited quantity, and by the very little angle of deflection grating 155, realize full sub-band monitoring, so not only improve the resolution of spectral detection, sweep speed is fast among a small circle, and its cost is low.
Fig. 5 a is the 3rd embodiment of compact optical detector of the present invention, shown in Fig. 5 a: as described in supervising device 30 comprise: input beam end 31 input is loaded with multiple wavelet segment signal light beam; One photodetection unit 32 can be comprised of a plurality of monitor diode arrays, first lens 33, the second lens 34 with beam collimation, focus on the described photo detecting unit 32; One transmission-type grating 35 especially is the volume phase grating (VPG) that is comprised of high efficiency DCG material, and described diffraction grating 35 places between first lens 33 and the second lens 34; One data processing unit 36 receives is connected communication by data wire 37 and connects with photo detecting unit; And one display unit 38 are connected communication with data processing unit by data wire 39 and connect.
Wherein, described transmission-type grating 35 comprises at least one substrate and a diffraction surfaces, and described grating 35 comprises that first substrate 35a, second substrate 35b and a diffraction element 35c are deposited between first and second substrate.First substrate 35a and second substrate 35b can be comprised of low diffusion glass material, and its surface is coated with anti-reflection film and improves the percent of pass of light beam.Described photo detecting unit 32 becomes the signal of telecommunication with the light energy conversion of each optical detection device, receive and read by data processing unit 36 afterwards, shown by display unit 38 again, wherein, this material manufacturing to the light beam wavelength sensitivity of the available GaAs of each detecting element on the photo detecting unit 32.Described data processing unit 36 can make the data processing module of prior art, such as the A/D converter.
The light path principle of this embodiment is: 31 emissions of input beam end are loaded with the multiband light beam of multi-wavelength, and input beam is collimated to grating 35 to first lens 33 so that the effective diffracted beam of grating.Described the second lens 34 receive the diffracted beam of grating 35 outgoing, and described diffracted beam is converged on each detecting element of the photo detecting unit 32 on the focusing surface of the second lens 34, like this, by the second lens 34, the different wave length bundle converges on each corresponding detecting element of photo detecting unit 32.
In the present embodiment, shown in Fig. 5 b: as described in photo detecting unit 32 connect an electrical micro-machine 321, drive each detecting element on the photo detecting unit 32 and do at the focusing surface of the second lens 34 and move up and down.Shown in Fig. 3 b: for example, detecting element PD1, the PD2 on the photo detecting unit 32, PD3...PDn are respectively to sub-band λ
1,λ
2, λ
3... .. λ
nLight beam scan, for example, detecting element PD1 is λ to centre wavelength
1The light beam of wave band is from starting point λ
11To end point λ
12Carry out this sub-band spectral scan, same, detecting element PD2 is λ to centre wavelength
2The light beam of wave band is from starting point λ
21To end point λ
22Carry out this sub-band spectral scan, by that analogy, detecting element PDn is λ to centre wavelength
nThe light beam of wave band is from starting point λ
N1To end point λ
N2Carry out this sub-band spectral scan.Can design like this quantity of the detecting element PD of limited quantity, and by mobile photo detecting unit 32, realize full sub-band monitoring, so not only improve the resolution of spectral detection, and Small-angle Rotation is finished each sub-band scanning, and sweep speed is fast, and its cost.
Fig. 6 is the 4th embodiment of compact optical detector of the present invention, and as shown in Figure 6: described supervising device 60 comprises: 61 inputs of input beam end are loaded with multiple wavelet segment signal light beam; One photodetection unit 62 can be comprised of a plurality of monitor diode arrays, lens 63 with beam collimation, focus on the described photo detecting unit 62; One transmission-type grating 65 especially is the volume phase grating (VPG) that is comprised of high efficiency DCG material, and described diffraction grating 65 places between lens 63 and the MEMS speculum 64; One data processing unit 66 receives is connected communication by data wire 67 and connects with photo detecting unit; And one display unit 68 are connected communication with data processing unit by data wire 69 and connect.Wherein, described MEMS speculum 64 rotates MEMS speculum 64 its angles of reflection of change by connecting a MEMS mirror drive 641 driving voltages, electromagnetic field etc.
Wherein, described transmission-type grating 65 comprises at least one substrate and a diffraction surfaces, and described grating 65 comprises that first substrate 65a, second substrate 65b and a diffraction element 65c are deposited between first and second substrate.First substrate 65a and second substrate 65b can be comprised of low diffusion glass material, and its surface is coated with anti-reflection film and improves the percent of pass of light beam.Described photo detecting unit 62 becomes the signal of telecommunication with the light energy conversion of each optical detection device, receive and read by data processing unit 66 afterwards, shown by display unit 68 again, wherein, this material manufacturing to the light beam wavelength sensitivity of the available GaAs of each detecting element on the photo detecting unit 62.Described data processing unit 66 can make the data processing module of prior art, such as the A/D converter.
The light path principle of this embodiment is, 61 emissions of input beam end are loaded with the multiband light beam of multi-wavelength, input beam is collimated to grating 65 with lens 63 so that the effective diffracted beam of grating, described speculum 64 receives the diffracted beam of gratings 65 outgoing, again with described beam reflection light echo grid 65 through gratings again behind the diffraction scioptics 63 converge on each detecting element of the photo detecting unit 62 on the focusing surface of lens 63.
Described MEMS speculum 64 utilizes MEMS mirror drive 641 to make described MEMS speculum 64 rotate low-angle, makes the beam angle change that is reflected back grating 65 via MEMS speculum 64, and prior art needs detecting element 62 to comprise detection sub-band λ
1, λ
2,λ
3... .. λ
nN detecting element monitoring grating 65 isolated sub-band λ
1, λ
2,λ
3... .. λ
nN sub-band, detecting element PD1, the PD2 on the photo detecting unit 65, PD3...PDn be the corresponding sub-band λ that receives respectively
1, λ
2,λ
3... .. λ
nLight beam, MEMS speculum 64, detecting element PD1, PD2, PD3...PDn be the corresponding sub-band λ that receives respectively
1, λ
2,λ
3... .. λ
nLight beam scan, for example, detecting element PD1 is λ to centre wavelength
1The light beam of wave band is from starting point λ
11To end point λ
12Carry out this sub-band spectral scan, same, detecting element PD2 is λ to centre wavelength
2The light beam of wave band is from starting point λ
21To end point λ
22Carry out this sub-band spectral scan, by that analogy, detecting element PDn is λ to centre wavelength
nThe light beam of wave band is from starting point λ
N1To end point λ
N2Carry out this sub-band spectral scan.Can design like this quantity of the detecting element PD of limited quantity, and rotate by MEMS speculum 64, realize full sub-band monitoring, so not only improve the resolution of spectral detection, and only demand motive MEMS speculum rotates low-angle, and the detecting element PD of limited quantity is scanned response wave band, reduce its cost thereby reduce PD quantity with respect to the prior art fixed structure.
Present embodiment only comprises by MEMS speculum 64 and changes the again execution mode of the angle of incident grating 65, and for the application of other light paths of this application, the present invention is not repeated.
The advantage that the present invention has is: because the present invention adopts each detecting element that changes on grating incidence angle or the mobile photo detecting unit realization photo detecting unit can scan the spectrum of each sub-band, thereby not only improve the resolution of spectral detection, reduce the quantity of the probe unit on the probe unit, each sub-band scanning, sweep speed is fast, and cost is low.
The above person only for most preferred embodiment of the present invention, is not be used to limiting the scope of the invention, and all equivalences of doing according to the present patent application claim change or modify, and are all the present invention and contain.
Claims (15)
1. an optical property supervisory control system comprises that one is loaded with the input of multiple wavelet section, utilize the be coupled flashlight of this optical fiber input of an optical coupler to be separated to supervisory control system, described supervisory control system comprises: a Multiplexing apparatus inputs to a supervising device with a small amount of light beam that optical coupler separates, and comprises that an input beam termination folds the light beam of electro-optical device input; One light receiving unit is for detection of whole wave band light beam, the collimation unit with beam collimation, focus on the described light receiving unit; Throwaway of the same colour unit places between input beam end and the collimation unit and isolates the sub-band light beam; Communication is connected one data processing unit with light receiving unit; And one display unit communication is connected with data processing unit, it is characterized in that: native system can make each receiving element spectral power in each corresponding sub-band of continuous sweep respectively on the receiving element by changing dispersion unit incidence angle or mobile light receiving element.
2. system according to claim 1 is characterized in that: described mobile reception unit is mobile at the party face of collimation focal element.
3. system according to claim 1, it is characterized in that: described dispersion unit is transmission-type grating or reflective gratings.
4. system according to claim 3 is characterized in that: the volume phase grating of described transmission-type grating for being comprised of high efficiency DCG material.
5. it is characterized in that according to claim 1 and 2 or 3 described systems: described light receiving element is that a plurality of monitor diode arrays form.
6. system according to claim 1 is characterized in that: comprise some collimating optical fibre array received sub-band light beams before the described light receiving unit.
7. an optical property supervising device comprises input beam end input multiband light beam; At least one collimation unit with beam collimation, focus on the light receiving unit; Throwaway of the same colour unit places between collimation unit and the light receiving unit, described input multiband light beam, input beam is collimated to the dispersion unit in described collimation unit so that the effective diffracted beam in dispersion unit, and described diffracted beam is converged on the light receiving unit, it is characterized in that: this device can make each receiving element spectral power in each corresponding sub-band of continuous sweep respectively on the receiving element by changing dispersion unit incidence angle or mobile light receiving element.
8. device according to claim 7, it is characterized in that: comprise a rotary reflector with the beam reflection color reversion throwaway unit of dispersion unit, rotation rotary reflector change dispersion unit incidence angle makes the interior spectral power of each receiving element difference each corresponding sub-band of continuous sweep on the receiving element.
9. device according to claim 8, it is characterized in that: described rotary reflector is the MEMS speculum.
10. device according to claim 9 is characterized in that: described MEMS speculum connects a MEMS mirror drive makes the MEMS speculum change mirror angle.
11. device according to claim 7 is characterized in that: comprise some collimating optical fibre array received sub-band light beams before the described light receiving unit.
12. device according to claim 7 is characterized in that: described dispersion unit is transmission-type grating or reflective gratings.
13. device according to claim 12 is characterized in that: the volume phase grating of described transmission-type grating for being formed by high efficiency DCG material.
14. device according to claim 7 is characterized in that: described light receiving element places the focusing surface of collimation unit.
15. device according to claim 7 is characterized in that: described light receiving element is that a plurality of monitor diode arrays form.
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| CN2011102590086A CN102970073A (en) | 2011-09-01 | 2011-09-01 | Device and system for optical performance monitoring |
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| CN2011102590086A CN102970073A (en) | 2011-09-01 | 2011-09-01 | Device and system for optical performance monitoring |
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| CN103684616A (en) * | 2013-12-25 | 2014-03-26 | 武汉电信器件有限公司 | Adjustable photoreceiver structure |
| CN104348555A (en) * | 2013-08-06 | 2015-02-11 | 温州泛波激光有限公司 | Semiconductor laser for optical fiber communication |
| CN105136293A (en) * | 2015-06-09 | 2015-12-09 | 河南理工大学 | MEMS micro-mirror micro spectrometer based on transmission grating |
| CN107505676A (en) * | 2017-10-19 | 2017-12-22 | 黄石晨信光电股份有限公司 | A kind of multi-channel optical fibre synchronization automatic coupling device |
| CN109343034A (en) * | 2018-09-19 | 2019-02-15 | 中国电子科技集团公司第三十八研究所 | A kind of laser radar emission system based on MEMS galvanometer |
| CN109425431A (en) * | 2017-08-31 | 2019-03-05 | 福州高意通讯有限公司 | It is a kind of to use MEMS super-small spectrometer |
| WO2019071685A1 (en) * | 2017-10-10 | 2019-04-18 | 昂纳信息技术（深圳）有限公司 | By such means, not only is electrode resistance reduced, thus increasing cathode resistivity, reducing panel heat generation, and reducing power consumption, but packaging effects also are enhanced. |
| CN112904312A (en) * | 2021-01-25 | 2021-06-04 | 深圳煜炜光学科技有限公司 | Anti-interference method and device for laser radar |
| WO2022021747A1 (en) * | 2020-07-28 | 2022-02-03 | 武汉光迅科技股份有限公司 | Optical signal detection system |
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| CN104348555A (en) * | 2013-08-06 | 2015-02-11 | 温州泛波激光有限公司 | Semiconductor laser for optical fiber communication |
| CN104348555B (en) * | 2013-08-06 | 2019-04-02 | 温州泛波激光有限公司 | Semiconductor laser for fiber optic communication |
| CN103684616A (en) * | 2013-12-25 | 2014-03-26 | 武汉电信器件有限公司 | Adjustable photoreceiver structure |
| CN105136293A (en) * | 2015-06-09 | 2015-12-09 | 河南理工大学 | MEMS micro-mirror micro spectrometer based on transmission grating |
| CN105136293B (en) * | 2015-06-09 | 2019-05-14 | 河南理工大学 | A kind of MEMS micromirror micro spectrometer based on transmission grating |
| CN109425431A (en) * | 2017-08-31 | 2019-03-05 | 福州高意通讯有限公司 | It is a kind of to use MEMS super-small spectrometer |
| WO2019071685A1 (en) * | 2017-10-10 | 2019-04-18 | 昂纳信息技术（深圳）有限公司 | By such means, not only is electrode resistance reduced, thus increasing cathode resistivity, reducing panel heat generation, and reducing power consumption, but packaging effects also are enhanced. |
| CN107505676A (en) * | 2017-10-19 | 2017-12-22 | 黄石晨信光电股份有限公司 | A kind of multi-channel optical fibre synchronization automatic coupling device |
| CN107505676B (en) * | 2017-10-19 | 2019-08-20 | 黄石晨信光电股份有限公司 | A kind of multi-channel optical fibre synchronization automatic coupling device |
| CN109343034A (en) * | 2018-09-19 | 2019-02-15 | 中国电子科技集团公司第三十八研究所 | A kind of laser radar emission system based on MEMS galvanometer |
| WO2022021747A1 (en) * | 2020-07-28 | 2022-02-03 | 武汉光迅科技股份有限公司 | Optical signal detection system |
| CN112904312A (en) * | 2021-01-25 | 2021-06-04 | 深圳煜炜光学科技有限公司 | Anti-interference method and device for laser radar |
| CN112904312B (en) * | 2021-01-25 | 2024-01-30 | 深圳煜炜光学科技有限公司 | Anti-interference method and device for laser radar |
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