CN105393163A - System, method and device for adjusting optical fiber collimator - Google Patents
System, method and device for adjusting optical fiber collimator Download PDFInfo
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- CN105393163A CN105393163A CN201380077893.3A CN201380077893A CN105393163A CN 105393163 A CN105393163 A CN 105393163A CN 201380077893 A CN201380077893 A CN 201380077893A CN 105393163 A CN105393163 A CN 105393163A
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- optical fiber
- fiber collimator
- optical signal
- photodetector
- optical
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/62—Optical apparatus specially adapted for adjusting optical elements during the assembly of optical systems
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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
- G02B6/32—Optical coupling means having lens focusing means positioned between opposed fibre ends
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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
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4219—Mechanical fixtures for holding or positioning the elements relative to each other in the couplings; Alignment methods for the elements, e.g. measuring or observing methods especially used therefor
- G02B6/422—Active alignment, i.e. moving the elements in response to the detected degree of coupling or position of the elements
- G02B6/4225—Active alignment, i.e. moving the elements in response to the detected degree of coupling or position of the elements by a direct measurement of the degree of coupling, e.g. the amount of light power coupled to the fibre or the opto-electronic element
Abstract
Embodiments of the present invention relate to the field of optical communications. Provided are a system, a method and a device for adjusting an optical fiber collimator so as to implement accurate adjustment of a back intercept of the optical fiber collimator. The system comprises an optical transmitter, the optical fiber collimator, a reflector, a first optical detector, a second optical detector and a regulator. The optical transmitter is used for sending an optical signal to the optical fiber collimator. The optical fiber collimator is used for sending the optical signal to the reflector through an optical path. The reflector is used for reflecting the optical signal to the first optical detector, and sending the optical signal to the second optical detector. The first optical detector is used for obtaining an insertion loss of the optical fiber collimator based on the optical signal reflected by the reflector. The second optical detector is used for receiving the optical signal, and obtaining a light spot corresponding to the optical signal. The regulator is used for adjusting the back intercept of the optical fiber collimator so that the insertion loss meets a preset insertion loss and a radius of the light spot meets a target light spot radius. The system is used for adjusting the back intercept of the optical fiber collimator.
Description
A kind of system, method and apparatus technical field for adjusting optical fiber collimator
The present invention relates to optical communication field, more particularly to a kind of system for adjusting optical fiber collimator, method and apparatus.
Background technology
In existing optical passive component, need to configure optical fiber collimator to increase the coupling tolerance of transmitting terminal and receiving terminal in transmitting terminal and receiving terminal, so as to improve coupling spacing, to add optical element between transmitting terminal and receiving terminal, so as to realize the function of optics.
In the prior art, optical signal is sent by laser, and is transmitted through the fiber to optical fiber collimator, and by optical fiber collimator outgoing, by positioned at operating distance（That is the distance of receiving terminal optical fiber collimator and transmitting terminal optical fiber collimator）Half（I.e. optical signal is with a tight waist）The optical signal is reflexed to optical fiber collimator by the speculum at place, and enter light power meter by the optical fiber collimator, by light power meter by detecting that the Insertion Loss of the optical signal adjusts the rear cut-off distance of optical fiber collimator, until when the Insertion Loss reaches minimum value, you can confirm optical fiber collimator regulation completion.
During using the optical fiber collimator adjusted by prior art, in the case where meeting correspondence operating distance, need the rear cut-off distance of transmitting terminal optical fiber collimator identical with the rear cut-off distance of receiving terminal optical fiber collimator, so that the Insertion Loss of the optical fiber collimator of transmitting terminal and receiving terminal is minimum.But, using the method adjusted in the prior art to optical fiber collimator rear cut-off distance, because the optical element coupled between transmitting terminal and receiving terminal is limited for the size in the aperture of transmission light signal, therefore, in the transmitting procedure of optical signal, the optical signal of transmission possibly can not meet the size in the aperture of optical element, so as to cause optical signal transmission Quality Down（As crosstalk is serious）, that is to say, that in the prior art, the regulation according to Insertion Loss to the rear cut-off distance of optical fiber collimator, it is impossible to ensure the normal transmission of optical signal.
The content of the invention
Embodiments of the invention provide a kind of system for adjusting optical fiber collimator, method and apparatus, with the rear cut-off distance of accurate adjustment optical fiber collimator.
To reach above-mentioned purpose, embodiments of the invention are adopted the following technical scheme that：
There is provided a kind of system for adjusting optical fiber collimator, including optical transmitting set, optical fiber are accurate for first aspect
Straight device, reflector, the first photodetector, the second photodetector and adjuster；
The optical transmitting set, for sending optical signal to the optical fiber collimator；
The optical fiber collimator, for sending the optical signal to the reflector by light path, wherein, the reflector is located at the with a tight waist of the optical signal；
The reflector, for the optical signal to be reflexed into first photodetector by the optical fiber collimator, and the optical signal is sent to second photodetector；
First photodetector, the optical signal for being reflected according to the reflector obtains the Insertion Loss of the optical fiber collimator；
Second photodetector, for receiving the optical signal that the reflector is sent, and obtains the corresponding hot spot of the optical signal；
The adjuster, the rear cut-off distance for adjusting the optical fiber collimator meets target spot radius with the radius for causing the Insertion Loss to meet default Insertion Loss and the hot spot.
In first aspect in the first possible implementation, the reflector includes partial mirror, the partial mirror specifically for, the Part I of the optical signal is reflexed into first photodetector by the optical fiber collimator, and the Part II of the optical signal is sent to second photodetector.
With reference to first aspect or first aspect the first possible implementation, in second of possible implementation, the adjuster specifically for, adjust the rear cut-off distance of the optical fiber collimator, to cause the radius of the hot spot to meet the target spot radius, wherein, the target spot radius are the distances with a tight waist according to second photodetector to the optical signal, what the wavelength of target waist radius and the optical signal was obtained, the target waist radius is that the rear cut-off distance determined according to operating distance is obtained, the operating distance is the optical fiber collimator of transmitting terminal and the distance between the optical fiber collimator of receiving terminal.
With reference to second of possible implementation of first aspect, in the third possible implementation, the adjuster specifically for, adjust the rear cut-off distance of the optical fiber collimator, to cause the radius of the hot spot to meet the target spot radius, wherein, the target spot radius pass through formula
ω2 (ζ) = ω0 2[1 + (—^γ)2] obtain；Wherein, ζ be second photodetector to the distance with a tight waist of the optical signal, be the target spot radius,ω.For the target waist radius, Α represents the wavelength of the optical signal,
Wei Round frequencies.
Second aspect there is provided it is a kind of adjust optical fiber collimator method, including：
Adjust the rear cut-off distance of optical fiber collimator, to reach reflector by the optical signal of the optical fiber collimator, the optical signal is reflexed to the first photodetector by the reflector by the optical fiber collimator, to cause first photodetector to obtain the Insertion Loss of the optical fiber collimator according to the optical signal, the reflector sends the optical signal to the second photodetector, to cause second photodetector to obtain the hot spot of the optical signal according to the optical signal；
When the radius of the default Insertion Loss of Insertion Loss satisfaction and the hot spot meets target spot radius, it is determined that current rear cut-off distance is the work rear cut-off distance of the optical fiber collimator.
In second aspect in the first possible implementation, the reflector includes partial mirror, so that the Part I of the optical signal is reflexed to first photodetector by the partial mirror by the optical fiber collimator, and the Part II of the optical signal is sent to second photodetector.
With reference to second aspect or second aspect the first possible implementation, in second of possible implementation, the target spot radius are by formula
2 (ζ) = ω0 2[1 + (—^)2]
Obtain；Wherein, ζ is with a tight waist distance of second photodetector to the optical signal,ω(ζ) it is the target spot radius,ω.For target waist radius, Α represents the wavelength of the optical signal, is Round frequencies.
The third aspect there is provided a kind of adjuster, including：
Adjustment unit, rear cut-off distance for adjusting optical fiber collimator, to reach reflector by the optical signal of the optical fiber collimator, the optical signal is reflexed to the first photodetector by the reflector by the optical fiber collimator, to cause first photodetector to obtain the Insertion Loss of the optical fiber collimator according to the optical signal, the reflector sends the optical signal to the second photodetector, to cause second photodetector to obtain the hot spot of the optical signal according to the optical signal；
Determining unit, for when the radius of the default Insertion Loss of Insertion Loss satisfaction and the hot spot meets target spot radius, it is determined that current rear cut-off distance is the work rear cut-off distance of the optical fiber collimator.
In the third aspect first in possible implementation, the determining unit is specifically for determining that the target spot radius that the radius of the hot spot is met are by formula
Obtain；Wherein, ζ is with a tight waist distance of second photodetector to the optical signal,ω(ζ) it is the target spot radius,ω.For target waist radius, Α represents the wavelength of the optical signal, is Round frequencies.
Embodiments of the invention provide a kind of system of optical fiber collimator regulation, method and apparatus, to adjust the rear cut-off distance of optical fiber collimator, to reach reflector by the optical signal of the optical fiber collimator, the optical signal is reflexed to the first photodetector by the reflector by the optical fiber collimator, to cause first photodetector to obtain the Insertion Loss of the optical fiber collimator according to the optical signal, the reflector sends the optical signal to the second photodetector, to cause second photodetector to obtain the hot spot of the optical signal according to the optical signal, and according to the rear cut-off distance of the Insertion Loss and the hot spot accurate adjustment optical fiber collimator, so as to improve the precision and accuracy of the rear cut-off distance regulation to optical fiber collimator.
Brief description of the drawings
Fig. 1 is a kind of schematic diagram of optical fiber collimator provided in an embodiment of the present invention；
Fig. 2 is a kind of system diagram for adjusting optical fiber collimator provided in an embodiment of the present invention；
Fig. 3 is a kind of schematic diagram of the spherical lens transmission curve of optical fiber collimator provided in an embodiment of the present invention；
Fig. 4 is a kind of schematic flow sheet for the method for adjusting optical fiber collimator provided in an embodiment of the present invention；
Fig. 5 is a kind of structure chart of adjuster provided in an embodiment of the present invention；
Fig. 6 is the structure chart of another adjuster provided in an embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made belongs to the scope of protection of the invention.
Optical fiber collimator in the embodiment of the present invention is as shown in Fig. 1, including tail optical fiber, spherical lens (C- l ens) and glass bushing, is generally used using two optical fiber collimator pairings, the optical fiber is accurate
Straight device is receiving terminal optical fiber collimator positioned at receiving side, is transmitting terminal optical fiber collimator positioned at emitting side, and the distance between transmitting terminal optical fiber collimator and receiving terminal optical fiber collimator is operating distance, at 1/2nd of operating distance（That is the centre of transmitting terminal optical fiber collimator and receiving terminal optical fiber collimator spacing）The optical signal transmitted for optical fiber collimator it is with a tight waist, distance between the tail optical fiber and spherical lens of optical fiber collimator is the rear cut-off distance of the optical fiber collimator, the with a tight waist of optical fiber collimator can be changed by adjusting the rear cut-off distance of optical fiber collimator, the regulation process of optical fiber collimator is the regulation to the rear cut-off distance of optical fiber collimator in the embodiment of the present invention.
The embodiment of the present invention provides a kind of system of optical fiber collimator regulation, as shown in Fig. 2 including optical transmitting set 21, optical fiber collimator 22, reflector 23, the first photodetector 24, the second photodetector 25 and adjuster 26.
The optical transmitting set 21, for sending optical signal to the optical fiber collimator 22.
The optical fiber collimator 22, for sending the optical signal to the reflector 23 by light path.
Wherein, the reflector 23 is located at the with a tight waist of the optical signal.
The reflector 23, for the optical signal to be reflexed into first photodetector 24 by the optical fiber collimator 22, and the optical signal is sent to second photodetector 25.
First photodetector 24, the optical signal for being reflected according to the reflector 23 obtains the Insertion Loss of the optical fiber collimator 22.
Second photodetector 25, for receiving the optical signal of the optical fiber collimator 22 transmission, and obtains the corresponding hot spot of the optical signal.
The adjuster 26, the rear cut-off distance for adjusting the optical fiber collimator 22 meets target spot radius with the radius for causing the Insertion Loss to meet default Insertion Loss and the hot spot.
Wherein, when the radius of the default Insertion Loss of Insertion Loss satisfaction and the hot spot meets target spot radius, it is determined that the rear cut-off distance after the regulation is work rear cut-off distance, and the work rear cut-off distance is the rear cut-off distance for meeting the optical fiber collimator normal transmission optical signal.
Specifically, the optical transmitting set and first photodetector are connected with the optical fiber collimator, optical fiber collimator to be regulated is fixed on the adjuster, determine operating distance, and reflector is being disposed at 1/2nd of the operating distance of optical fiber collimator Exit positions, dispose the second photodetector in reflector another side.
It should be noted that after second photodetector placement, staff is adjusted by the adjuster
The position of whole optical fiber collimator, can be transmitted to the center of second photodetector with will pass through the optical signal of optical fiber collimator, to improve the accuracy for obtaining hot spot.
In addition, second photodetector should fit with the reflector, with the accuracy for improving the detection to hot spot and the corresponding situation with a tight waist of the rear cut-off distance for preferably judging current optical fiber collimater as far as possible.
Specifically, staff can be by needing the optical element of coupling to determine corresponding operating distance between transmitting terminal optical fiber collimator and receiving terminal optical fiber collimator.Wherein, the operating distance is the optical fiber collimator of transmitting terminal and the distance between the optical fiber collimator of receiving terminal.
In addition, it is necessary to the Rule of judgment for the corresponding target waist radius of optical fiber collimator that the size limitation in the aperture of the optical element of coupling can need to adjust as choosing.
For example, in 3D-MEMS (Three Dimension Micro-Electro-Mechanical System, three-dimensional micro-electromechanical system) photoswitch design in, need to couple two MEMS mirror chips between transmitting terminal optical fiber collimator and receiving terminal optical fiber collimator to realize function, and the size of the MEMS mirror chips is limited, therefore the hot spot transmitted by optical fiber collimator to the optical signal of the MEMS mirror chips is needed to exceed the size of the MEMS mirror chips, the Insertion Loss of the 3D-MEMS photoswitches can otherwise increased, and occur the serious situation of crosstalk, therefore, optical fiber collimator regulation Cheng Qian, the optical element coupled as needed first is needed to determine corresponding target waist radius.
Further, it is determined that after operating distance, determining target spot radius.
Specifically, staff can be as needed operating distance the theoretical values of two rear cut-off distances is determined by the corresponding relation of spherical lens transmission curve, and the theoretical value of two waist radiuses is determined by the corresponding relation of the spherical lens transmission curve according to the theoretical value of two rear cut-off distances, corresponding target waist radius is chosen in the size limitation in the aperture of the optical element coupled as needed, and target spot radius are determined according to the target waist radius, wherein, the corresponding relation of the spherical lens transmission curve is to be calculated to obtain by ABCD rules and q parameter according to the C-lens parameters of optical fiber collimator to be regulated.
Illustratively, as shown in Figure 3, transverse axis represents rear cut-off distance in figure, and longitudinal axis A is the corresponding value of operating distance curve, and longitudinal axis B is the corresponding value of waist radius curve, as can be seen from Figure, if it is determined that the operating distance needed is 60 millimeters, it is determined that there is two rear cut-off distances to meet the demand of the operating distance, respectively 0.22 millimeter and 0.35 millimeter, and can determine corresponding two waist radiuses, respectively 0.54 millimeter and 0.2 millimeter by two rear cut-off distances.
It should be noted that, due to corresponding target spot radius can be determined according to waist radius, therefore corresponding target waist radius is chosen in the airborne size limitation for the optical element that can be coupled as needed so that the hot spot of the corresponding optical signal of the target waist radius meets size limitation.
Further, the second photodetector of accurate measurement girdling the waist to the optical signal（I.e. at 1/2nd of operating distance）Between distance, and according to formula
ω2 (ζ) = ω0 2[1 + (—^)2] radius for obtaining the corresponding target hot spot of subject beam waist radius is calculated, so as to which during the optical fiber collimator is adjusted by the adjuster, the hot spot that the second optical receiver is obtained is judged according to the radius of the target hot spot.
Wherein, ζ be second photodetector to the distance with a tight waist of the optical signal, be the target spot radius,ω.For the target waist radius, Α represents the wavelength of the optical signal, is Round frequencies.
Further, it is determined that after target hot spot, opening optical transmitting set, the rear cut-off distance to optical fiber collimator is adjusted.
Specifically, the optical transmitting set sends optical signal to the optical fiber collimator, the optical signal is transmitted to the reflector positioned at place with a tight waist by the optical fiber collimator, the optical signal reflects by reflector, and transmitted by the optical fiber collimator to the first photodetector, then first photodetector obtains the Insertion Loss of the optical fiber collimator according to the optical signal；The reflector simultaneously sends the optical signal to second photodetector, then second photodetector obtains optical signal correspondence hot spot according to the optical signal；Staff adjusts the rear cut-off distance of the optical fiber collimator by the adjuster, and the Insertion Loss of the corresponding optical fiber collimator of rear cut-off distance is detected by first photodetector, the hot spot of the corresponding optical signal by the optical fiber collimator of rear cut-off distance is detected by second photodetector, in the case of predetermined target hot spot is met in the hot spot that second photodetector is obtained, when the Insertion Loss reaches minimum value, the rear cut-off distance for determining the optical fiber collimator is work rear cut-off distance.
It should be noted that, due to during the design of optics, making, processing and regulation, error inevitably occurs, therefore obtaining the situation that optical fiber collimator Insertion Loss is 0 by calculating can not meet in real process, therefore when measuring Insertion Loss, can determine that the Insertion Loss meets default Insertion Loss when the Insertion Loss measured is closest to 0, equally, according to calculate obtained target hot spot be also
Result ideally, during practical adjustments, when the radius of the hot spot obtained according to the second photodetector is approximately equal to the radius of target hot spot, you can judge that the hot spot meets target hot spot, so as to ensure normal transmission of the optical signal by the optical fiber collimator.
Alternatively, the reflector 23 includes partial mirror, the partial mirror by the optical fiber collimator by the Part I of the optical signal specifically for reflexing to first photodetector, and the Part II of the optical signal is sent to second photodetector.
Illustratively, the optical signal can be Gaussian beam, the optical transmitting set can be laser, the reflector can be speculum, first photodetector can be light power meter, second photodetector can be spot detector, laser and light power meter are connected with optical fiber collimator, and optical fiber collimator is fixed on adjuster, speculum is being disposed at 1/2nd of the operating distance of optical fiber collimator Exit positions, spot detector is disposed in the optical path, after the completion of the system building, open laser, laser sends Gaussian beam, Gaussian beam after optical fiber collimator by transmitting to the partial mirror, reflected by the partial mirror, a part for Gaussian beam returns to optical fiber collimator, and after by the optical fiber collimator, it is sent to light power meter, form the working light path of a complete optical fiber collimator, the Gaussian beam that light power meter detection is received, Insertion Loss is obtained according to Gaussian beam；In addition, by the transmission of the partial mirror, another part of Gaussian beam is transmitted to the spot detector, so that the spot detector receives Gaussian beam, and obtains corresponding hot spot；The rear cut-off distance of optical fiber collimator is adjusted by adjuster, and repeats the process that Insertion Loss and second photodetector detection hot spot are detected above by first photodetector.
In a kind of possible implementation of the present invention, staff first can tentatively be judged according to the size of the hot spot and target hot spot, after the hot spot is close to target hot spot, again the Insertion Loss is adjusted by adjusting rear cut-off distance, in the case where the hot spot and the target hot spot are basically identical, when the Insertion Loss reaches minimum value, determine that the Insertion Loss meets default Insertion Loss, the rear cut-off distance for then determining the optical fiber collimator is work rear cut-off distance, same, during regulation, by adjusting rear cut-off distance Insertion Loss can also be made to be less than predetermined threshold value, now, determine that the Insertion Loss meets default Insertion Loss, hot spot is adjusted by adjusting rear cut-off distance based on the Insertion Loss again, so as in the case where Insertion Loss reaches that the minimum and hot spot meets target hot spot, the rear cut-off distance for determining the optical fiber collimator is work rear cut-off distance, the embodiment of the present invention is not construed as limiting to this.
It should be noted that the partial mirror can realize that reflectivity should be more than transmissivity, such as by adding part reflectance coating：Reflectivity is 90%, and transmissivity is 10%, when reflectivity is big, reflection
Loss of optical signal energy it is small, be more convenient for first photodetector detection Insertion Loss, it can make it that the Insertion Loss that first photodetector is detected is more accurate, for second photodetector, only need to detect that the size of hot spot, and the size of hot spot is unrelated with energy, therefore the transmission of fraction optical signal is only needed to meet measurement demand.
Further, the adjuster 26 specifically for, adjust the rear cut-off distance of the optical fiber collimator, to cause the radius of the hot spot to meet the target spot radius, wherein, the target spot radius are obtained according to the wavelength of the distance with a tight waist of second photodetector to the optical signal, the target waist radius and the optical signal, wherein, the target waist radius is that the rear cut-off distance determined according to operating distance is obtained.
Illustratively, calculated before optical fiber collimator regulation according to formula and obtain target light spot radius for 0. 2 millimeters, during regulation, when the radius for the hot spot that the second photodetector is obtained is close to 0. 2 millimeters, then it can judge to carry out accurate adjustment parallel by Insertion Loss and hot spot again, pass through regulation, it was found that while the Insertion Loss that the first photodetector is detected reaches minimum value, the radius for the hot spot that second photodetector is obtained is approximately equal to 0. 2 millimeters, optical fiber collimator regulation completion can then be determined, during regulation, the hot spot need not be identical with the target hot spot, the radius for the hot spot that second photodetector is obtained is that the arbitrary value between 0. 19 millimeters to 0. 21 millimeters can also determine that the hot spot meets target hot spot, the embodiment of the present invention is not construed as limiting to this.
Further, after the completion of it is determined that the optical fiber collimator is adjusted, staff can fix the tail optical fiber and spherical lens of the optical fiber collimator with dispensing, so as to complete the regulation of the optical fiber collimator.
Further, after the optical fiber collimator is fixed, it is possible to use the optical fiber collimator adjusts other optical fiber collimators by the method for exchanging.
Specifically, it regard the optical fiber collimator for adjusting completion as reference optical fiber collimater, it regard the reference optical fiber collimater as transmitting terminal optical fiber collimator, it regard optical fiber collimator to be adjusted as receiving terminal optical fiber collimator, the reference optical fiber collimater and the optical fiber collimator to be adjusted are separately fixed at the two ends at intervals of operating distance length by adjuster by staff, the reference optical fiber collimater and the position of the optical fiber collimator to be adjusted are adjusted by adjuster, enable to be received by the optical fiber collimator to be adjusted by the optical signal of the reference optical fiber collimater, the optical transmitting set is connected to the reference optical fiber collimater, first photodetector is connected to the optical fiber collimator to be adjusted, adjust the rear cut-off distance of the optical fiber collimator to be adjusted, when the Insertion Loss that first photodetector is obtained is minimum, the rear cut-off distance for then illustrating the optical fiber collimator to be adjusted is work rear cut-off distance, i.e. this waits that dimming fine collimator adjustment completes.
It should be noted that, regulation process in the embodiment of the present invention on single optical fiber collimator, it can be used for adjusting optical fibre collimator array, specifically, unified dispensing is fixed after the completion of each optical fiber collimator in optical fibre collimator array is adjusted according to the above method.
By using said system, adjust the rear cut-off distance of optical fiber collimator, to reach reflector by the optical signal of the optical fiber collimator, the optical signal is reflexed to the first photodetector by the reflector by the optical fiber collimator, to cause first photodetector to obtain the Insertion Loss of the optical fiber collimator according to the optical signal, the reflector sends the optical signal to the second photodetector, to cause second photodetector to obtain the hot spot of the optical signal according to the optical signal, according to the rear cut-off distance of the Insertion Loss and the hot spot accurate adjustment optical fiber collimator, so as to improve the precision and accuracy of the rear cut-off distance regulation to optical fiber collimator.The embodiment of the present invention provides a kind of method for adjusting optical fiber collimator, as shown in figure 4, this method embodiment is applied to the system that a kind of optical fiber collimator is adjusted, the system includes：Optical transmitting set, optical fiber collimator, reflector, the first photodetector, the second photodetector and adjuster, the executive agent of this method is adjuster, including：
S40 adjusters adjust the rear cut-off distance of optical fiber collimator, to reach reflector by the optical signal of the optical fiber collimator, the optical signal is reflexed to the first photodetector by the reflector by the optical fiber collimator, to cause first photodetector to obtain the Insertion Loss of the optical fiber collimator according to the optical signal, the reflector sends the optical signal to the second photodetector, to cause second photodetector to obtain the hot spot of the optical signal according to the optical signal.
Specifically, the optical signal that the optical transmitting set is sent to the optical fiber collimator is transmitted to the reflector positioned at place with a tight waist by the optical fiber collimator, the optical signal reflects by reflector, and transmitted by the optical fiber collimator to the first photodetector so that first photodetector obtains the Insertion Loss of the optical fiber collimator according to the optical signal；The reflector simultaneously sends the optical signal to second photodetector so that second photodetector obtains optical signal correspondence hot spot according to the optical signal；After adjuster adjusts the rear cut-off distance of the optical fiber collimator, the Insertion Loss of the corresponding optical fiber collimator of rear cut-off distance is detected by first photodetector, and pass through the hot spot of the second photodetector detection corresponding optical signal by the optical fiber collimator of rear cut-off distance.
It should be noted that after second photodetector placement, staff adjusts the position of optical fiber collimator by the adjuster, can be transmitted to second light with will pass through the optical signal of optical fiber collimator
The center of detector, to improve the accuracy for obtaining hot spot.
Further, staff can be by needing the optical element of coupling to determine corresponding operating distance between transmitting terminal optical fiber collimator and receiving terminal optical fiber collimator.Wherein, the operating distance is the optical fiber collimator of transmitting terminal and the distance between the optical fiber collimator of receiving terminal
In a kind of possible implementation of the present invention, the reflector includes partial mirror, so that the Part I of the optical signal is reflexed to first photodetector by the partial mirror by the optical fiber collimator, and the Part II of the optical signal is sent to second photodetector.
Illustratively, the optical signal can be Gaussian beam, the optical transmitting set can be laser, the reflector can be partial mirror, first photodetector can be light power meter, second photodetector can be spot detector, the laser and light power meter are connected with optical fiber collimator, the optical fiber collimator is fixed on adjuster, partial mirror is being mounted with 1/2nd of the operating distance of optical fiber collimator Exit positions, the opposite side for receiving optical signal in the partial mirror is mounted with spot detector, the Gaussian beam that the laser is sent after optical fiber collimator by transmitting to the partial mirror, reflected by the partial mirror, a part for Gaussian beam returns to optical fiber collimator, and after by the optical fiber collimator, it is sent to light power meter, form the working light path of a complete optical fiber collimator, the Gaussian beam that light power meter detection is received, Insertion Loss is obtained according to the Gaussian beam, in addition, pass through the transmission of the partial mirror, another part of Gaussian beam is transmitted to the spot detector, so that the spot detector receives Gaussian beam, and obtain corresponding hot spot.
It should be noted that the partial mirror can realize that reflectivity should be more than transmissivity, such as by adding part reflectance coating：Reflectivity is 90%, transmissivity is 10%, when reflectivity is big, the energy of the Gaussian beam loss of reflection is small, first photodetector detection Insertion Loss of being more convenient for, and can make it that the Insertion Loss that first photodetector is detected is more accurate, for second photodetector, the size of hot spot is only needed to detect that, and the size of hot spot is then unrelated with energy, therefore only need the transmission of fraction Gaussian beam to meet measurement demand.
S402, adjuster are when the radius of the default Insertion Loss of Insertion Loss satisfaction and the hot spot meets target spot radius, it is determined that current rear cut-off distance is the work rear cut-off distance of the optical fiber collimator.
Illustratively, staff adjusts the rear cut-off distance of optical fiber collimator by adjuster, and repeat the process for detecting Insertion Loss and second photodetector detection hot spot in above-mentioned steps S401 by first photodetector, staff first can tentatively be judged according to the size of the hot spot and target hot spot
After the hot spot is close to target hot spot, again the Insertion Loss is adjusted by adjusting rear cut-off distance, in the case where the hot spot and the target hot spot are basically identical, when the Insertion Loss reaches minimum value, determine that the Insertion Loss meets default Insertion Loss, the rear cut-off distance for then determining the optical fiber collimator is work rear cut-off distance, same, during regulation, by adjusting rear cut-off distance Insertion Loss can also be made to be less than predetermined threshold value, now, determine that the Insertion Loss meets default Insertion Loss, hot spot is adjusted by adjusting rear cut-off distance based on the Insertion Loss again, so as in the case where Insertion Loss reaches that the minimum and hot spot meets target hot spot, the rear cut-off distance for determining the optical fiber collimator is work rear cut-off distance, the embodiment of the present invention is not construed as limiting to this.
It should be noted that, due to the design in optics, make, during processing and regulation, error inevitably occurs, therefore obtaining the situation that optical fiber collimator Insertion Loss is 0 by calculating can not meet in real process, therefore when measuring Insertion Loss, Insertion Loss is found closest to can determine that the Insertion Loss meets default Insertion Loss when 0, equally, it is also result in the ideal situation by calculating obtained target hot spot, during practical adjustments, when the radius of the hot spot obtained according to the second photodetector is approximately equal to the radius of target hot spot, it can determine that the hot spot meets target hot spot.
Further, before the optical fiber collimator is adjusted, staff can be as needed operating distance the theoretical values of two rear cut-off distances is determined by the corresponding relation of spherical lens transmission curve, and the theoretical value of two waist radiuses is determined by the corresponding relation of the spherical lens transmission curve according to the theoretical value of two rear cut-off distances, corresponding target waist radius is chosen in the size limitation in the aperture of the optical element coupled as needed, and target spot radius are determined according to the target waist radius, wherein, the corresponding relation of the spherical lens transmission curve is to be calculated to obtain by ABCD rules and q parameter according to the C- l ens parameters of optical fiber collimator to be regulated, detailed process refers to the description to Fig. 3 in above-described embodiment, here is omitted.
, wherein it is desired to the Rule of judgment for the corresponding target waist radius of optical fiber collimator that the size limitation in the aperture of the optical element of coupling can need to adjust as choosing.
For example, in the design of 3D-MEMS photoswitches, need to couple two MEMS mi r ror chips between transmitting terminal optical fiber collimator and receiving terminal optical fiber collimator to realize function, and the size of the MEMS mi r ror chips is limited, therefore need to transmit by optical fiber collimator to the hot spot of the optical signal of the MEMS m i r ror chips and can not exceed the size of the MEMS mi r ror chips, the Insertion Loss of the 3D-MEMS photoswitches can otherwise increased, and occur the serious situation of crosstalk, therefore, before the regulation process of optical fiber collimator, the optical element coupled as needed first is needed to determine corresponding target waist radius.
Further, before the optical fiber collimator is adjusted, staff's operating distance as needed determines the theoretical value of two rear cut-off distances, and the theoretical value of two waist radiuses is determined according to the theoretical value of two rear cut-off distances, corresponding target waist radius is chosen in the size limitation in the aperture of the optical element coupled as needed, by accurately measuring the second photodetector girdling the waist to the optical signal（I.e. at 1/2nd of operating distance）Between distance, then can be according to formula
ω2 (ζ) = ω0 2[1 + (—^)2] radius for obtaining the corresponding target hot spot of subject beam waist radius is calculated, so as to which during the rear cut-off distance of the optical fiber collimator is adjusted by the adjuster, the hot spot that the second optical receiver is obtained is judged according to the radius of the target hot spot.
Wherein, ζ be second photodetector to the distance with a tight waist of the optical signal, be the target spot radius,ω.For the target waist radius, Α represents the wavelength of the optical signal, is Round frequencies.
Illustratively, staff calculates according to formula before the rear cut-off distance of regulation optical fiber collimator and obtains target light spot radius for 0. 2 millimeters, then during regulation, when the radius for the hot spot that the second photodetector is obtained moves closer to 0. 2 millimeters, then it can judge to carry out accurate adjustment parallel by Insertion Loss and hot spot again, pass through regulation, it was found that while the Insertion Loss that the first photodetector is detected reaches minimum value, the radius for the hot spot that second photodetector is obtained is approximately equal to 0. 2 millimeters, optical fiber collimator regulation completion can then be determined, during regulation, the hot spot need not be identical with the target hot spot, the radius for the hot spot that second photodetector is obtained is that the arbitrary value between 0. 19 millimeters to 0. 21 millimeters can also judge that the hot spot meets target hot spot, the embodiment of the present invention is not construed as limiting to this.
It should be noted that, due to corresponding target spot radius can be determined according to waist radius, therefore corresponding target waist radius is chosen in the airborne size limitation for the optical element that can be coupled as needed so that the hot spot of the corresponding optical signal of the target waist radius meets size limitation.
Further, after the completion of it is determined that the optical fiber collimator is adjusted, staff can fix the tail optical fiber and spherical lens of the optical fiber collimator with dispensing, so as to complete the regulation of optical fiber collimator.
Further, after the optical fiber collimator is fixed, the adjuster can adjust other optical fiber collimators using the optical fiber collimator by the method for exchanging.
Specifically, the optical fiber collimator completed will be adjusted as reference optical fiber collimater, by the reference light
Fine collimater is used as transmitting terminal optical fiber collimator, it regard optical fiber collimator to be adjusted as receiving terminal optical fiber collimator, the reference optical fiber collimater and the optical fiber collimator to be adjusted are separately fixed at the two ends at intervals of operating distance length by adjuster by staff, adjusted by adjuster, enable to be received by the optical fiber collimator to be adjusted by the optical signal of the reference optical fiber collimater, the optical transmitting set is connected to the reference optical fiber collimater, first photodetector is connected to the optical fiber collimator to be adjusted, adjust the optical fiber collimator to be adjusted, when the Insertion Loss that first photodetector is obtained is minimum, the rear cut-off distance for then illustrating the optical fiber collimator to be adjusted is work rear cut-off distance, i.e. this waits that dimming fine collimator adjustment completes.
It should be noted that, regulation process in the embodiment of the present invention on single optical fiber collimator, it can be used for adjusting optical fibre collimator array, specifically, unified dispensing is fixed after the completion of each optical fiber collimator in optical fibre collimator array is adjusted according to the above method.
By using the method for above-mentioned regulation optical fiber collimator, adjust the rear cut-off distance of optical fiber collimator, to reach reflector by the optical signal of the optical fiber collimator, the optical signal is reflexed to the first photodetector by the reflector by the optical fiber collimator, to cause first photodetector to obtain the Insertion Loss of the optical fiber collimator according to the optical signal, the reflector sends the optical signal to the second photodetector, to cause second photodetector to obtain the hot spot of the optical signal according to the optical signal, and according to the rear cut-off distance of the Insertion Loss and the hot spot accurate adjustment optical fiber collimator, so as to improve the precision and accuracy of the rear cut-off distance regulation to optical fiber collimator.The embodiment of the present invention provides a kind of adjuster 50, as shown in figure 5, including：
Adjustment unit 51, rear cut-off distance for adjusting optical fiber collimator, to reach reflector by the optical signal of the optical fiber collimator, the optical signal is reflexed to the first photodetector by the reflector by the optical fiber collimator, to cause first photodetector to obtain the Insertion Loss of the optical fiber collimator according to the optical signal, the reflector sends the optical signal to the second photodetector, to cause second photodetector to obtain the hot spot of the optical signal according to the optical signal.
Determining unit 52, for when the radius of the default Insertion Loss of Insertion Loss satisfaction and the hot spot meets target spot radius, it is determined that current rear cut-off distance is the work rear cut-off distance of the optical fiber collimator.
Specifically, the optical transmitting set and first photodetector are connected with the optical fiber collimator, optical fiber collimator to be regulated is fixed on the adjuster, reflector is being mounted with 1/2nd of the operating distance of optical fiber collimator Exit positions, and the second photodetector is mounted with reflector another side.
It should be noted that, after second photodetector placement, staff adjusts the position of optical fiber collimator by the adjuster, can be transmitted to the center of second photodetector with will pass through the optical signal of optical fiber collimator, to improve the accuracy for obtaining hot spot.
Specifically, can be by needing the optical element of coupling to determine corresponding operating distance between transmitting terminal optical fiber collimator and receiving terminal optical fiber collimator.Wherein, the operating distance is the optical fiber collimator of transmitting terminal and the distance between the optical fiber collimator of receiving terminal
Further, it is determined that after operating distance, determining target spot radius.
Due to corresponding target spot radius can be determined according to waist radius, therefore corresponding target waist radius is chosen in the airborne size limitation for the optical element that can be coupled as needed so that the hot spot of the corresponding optical signal of the target waist radius meets size limitation.
In particular it is required that the Rule of judgment for the corresponding target waist radius of optical fiber collimator that the size limitation in the aperture of the optical element of coupling can need to adjust as choosing.
For example, in 3D-MEMS (Three Dimension Micro-Electro-Mechanical System, three-dimensional micro-electromechanical system) photoswitch design in, need to couple two MEMS mirror chips between transmitting terminal optical fiber collimator and receiving terminal optical fiber collimator to realize function, and the size of the MEMS mirror chips is limited, therefore the hot spot transmitted by optical fiber collimator to the optical signal of the MEMS mirror chips is needed to exceed the size of the MEMS mirror chips, the Insertion Loss of the 3D-MEMS photoswitches can otherwise increased, and occur the serious situation of crosstalk, therefore, before the rear cut-off distance of regulation optical fiber collimator, the optical element coupled as needed first is needed to determine corresponding target waist radius.
Specifically, before the optical fiber collimator is adjusted, staff can be as needed operating distance the theoretical values of two rear cut-off distances is determined by the corresponding relation of spherical lens transmission curve, and the theoretical value of two waist radiuses is determined by the corresponding relation of the spherical lens transmission curve according to the theoretical value of two rear cut-off distances, corresponding target waist radius is chosen in the size limitation in the aperture of the optical element coupled as needed, and target spot radius are determined according to the target waist radius, wherein, the corresponding relation of the spherical lens transmission curve is to be calculated to obtain by ABCD rules and q parameter according to the C-lens parameters of optical fiber collimator to be regulated, with specific reference to the description as described in Fig. 3 in above-described embodiment, here is omitted.
Further, according to the with a tight waist of second photodetector to the optical signal（That is the two of operating distance
At/mono-）Between distance, pass through formula
ω2 (ζ) = ω0 2[1 + (—^)2] radius for obtaining the corresponding target hot spot of subject beam waist radius is calculated, so as to which during the optical fiber collimator is adjusted by the adjuster, the hot spot that the second optical receiver is obtained is judged according to the radius of the target hot spot.
Wherein, ζ be second photodetector to the distance with a tight waist of the optical signal, be the target spot radius,ω.For the target waist radius, Α represents the wavelength of the optical signal, is Round frequencies.
Further, after the above step is finished, optical transmitting set is opened, the rear cut-off distance to optical fiber collimator is adjusted.
Specifically, the optical transmitting set sends optical signal to the optical fiber collimator, the optical signal is transmitted to the reflector positioned at place with a tight waist by the optical fiber collimator, the optical signal reflects by reflector, and transmitted by the optical fiber collimator to the first photodetector, then first photodetector obtains the Insertion Loss of the optical fiber collimator according to the optical signal；The reflector simultaneously sends the optical signal to second photodetector, then second photodetector obtains optical signal correspondence hot spot according to the optical signal；Staff adjusts the rear cut-off distance of the optical fiber collimator by the adjuster, and the Insertion Loss of the corresponding optical fiber collimator of rear cut-off distance is detected by first photodetector, the hot spot of the corresponding optical signal by the optical fiber collimator of rear cut-off distance is detected by second photodetector.
In a kind of possible implementation of the present invention, the reflector includes partial mirror, so that the Part I of the optical signal is reflexed to first photodetector by the partial mirror by the optical fiber collimator, and the Part II of the optical signal is sent to second photodetector.
It should be noted that the partial mirror can realize that reflectivity should be more than transmissivity, such as by adding part reflectance coating：Reflectivity is 90%, transmissivity is 1 0%, when reflectivity is big, the energy of the Gaussian beam loss of reflection is small, first photodetector detection Insertion Loss of being more convenient for, and can make it that the Insertion Loss that first photodetector is detected is more accurate, for second photodetector, the size of hot spot is only needed to detect that, the size of two hot spots is then unrelated with energy, therefore only need the transmission of fraction Gaussian beam to meet measurement demand.
Illustratively, the optical signal can be Gaussian beam, and the optical transmitting set can be laser, and this is anti-
Emitter can be speculum, first photodetector can be light power meter, second photodetector can be spot detector, the laser and light power meter are connected with optical fiber collimator, and the optical fiber collimator is fixed on adjuster, partial mirror is being mounted with 1/2nd of the operating distance of optical fiber collimator Exit positions, spot detector is mounted with after the partial mirror, the Gaussian beam that the laser is sent after optical fiber collimator by transmitting to the partial mirror, reflected by the partial mirror, a part for Gaussian beam returns to optical fiber collimator, and after by the optical fiber collimator, it is sent to light power meter, form the working light path of a complete optical fiber collimator, the Gaussian beam that light power meter detection is received, Insertion Loss is obtained according to the Gaussian beam, pass through the transmission of the partial mirror, another part of Gaussian beam is transmitted to the spot detector, so that the spot detector receives Gaussian beam, and obtain corresponding hot spot；The rear cut-off distance of optical fiber collimator is adjusted by adjuster, and repeats the process that Insertion Loss and second photodetector detection hot spot are detected above by first photodetector.
In a kind of possible implementation of the present invention, staff first can tentatively be judged according to the size of the hot spot and target hot spot, after the hot spot is close to target hot spot, again the Insertion Loss is adjusted by adjusting rear cut-off distance, in the case where the hot spot and the target hot spot are basically identical, when the Insertion Loss reaches minimum value, determine that the Insertion Loss meets default Insertion Loss, the rear cut-off distance for then determining the optical fiber collimator is work rear cut-off distance, same, during regulation, by adjusting rear cut-off distance Insertion Loss can also be made to be less than predetermined threshold value, now, determine that the Insertion Loss meets default Insertion Loss, hot spot is adjusted by adjusting rear cut-off distance based on the Insertion Loss again, so as in the case where Insertion Loss reaches that the minimum and hot spot meets target hot spot, the rear cut-off distance for determining the optical fiber collimator is work rear cut-off distance, the embodiment of the present invention is not construed as limiting to this.
Specifically, the determining unit 52 is specifically for determining that the radius of the hot spot meets the target spot radius obtained by above-mentioned formula.
Illustratively, calculated before the rear cut-off distance of regulation optical fiber collimator according to formula and obtain target light spot radius for 0. 2 millimeters, then during regulation, when the radius for the hot spot that the second photodetector is obtained is close to 0. 2 millimeters, then it can judge to carry out accurate adjustment parallel by Insertion Loss and hot spot again, pass through regulation, it was found that while the Insertion Loss that the first photodetector is detected reaches minimum value, the radius for the hot spot that second photodetector is obtained is approximately equal to 0. 2 millimeters, optical fiber collimator regulation completion can then be determined, during regulation, the hot spot need not be identical with the target hot spot, the radius for the hot spot that second photodetector is obtained is that the arbitrary value between 0. 19 millimeters to 0. 21 millimeters can also determine that the hot spot is expired
Foot-eye hot spot, the embodiment of the present invention is not construed as limiting to this.
Further, after the completion of it is determined that the optical fiber collimator is adjusted, the tail optical fiber and spherical lens of the optical fiber collimator can be fixed with dispensing, so as to complete the regulation of the optical fiber collimator.
Further, after the optical fiber collimator is fixed, it is possible to use the optical fiber collimator adjusts other optical fiber collimators by the method for exchanging.
Specifically, it regard the optical fiber collimator for adjusting completion as reference optical fiber collimater, it regard the reference optical fiber collimater as transmitting terminal optical fiber collimator, it regard optical fiber collimator to be adjusted as receiving terminal optical fiber collimator, the reference optical fiber collimater and the optical fiber collimator to be adjusted are separately fixed at by adjuster by the two ends at intervals of operating distance length, the reference optical fiber collimater and the position of the optical fiber collimator to be adjusted are adjusted by adjuster, enable to be received by the optical fiber collimator to be adjusted by the optical signal of the reference optical fiber collimater, the optical transmitting set is connected to the reference optical fiber collimater, first photodetector is connected to the optical fiber collimator to be adjusted, adjust the rear cut-off distance of the optical fiber collimator to be adjusted, when the Insertion Loss that first photodetector is obtained is minimum, the rear cut-off distance for then illustrating the optical fiber collimator to be adjusted is work rear cut-off distance, i.e. this waits that dimming fine collimator adjustment completes.
It should be noted that, regulation process in the embodiment of the present invention on single optical fiber collimator, it can be used for adjusting optical fibre collimator array, specifically, unified dispensing is fixed after the completion of each optical fiber collimator in optical fibre collimator array is adjusted according to the above method.
By using above-mentioned adjuster, adjust the rear cut-off distance of optical fiber collimator, to reach reflector by the optical signal of the optical fiber collimator, the optical signal is reflexed to the first photodetector by the reflector by the optical fiber collimator, to cause first photodetector to obtain the Insertion Loss of the optical fiber collimator according to the optical signal, the reflector sends the optical signal to the second photodetector, to cause second photodetector to obtain the hot spot of the optical signal according to the optical signal, according to the rear cut-off distance of the Insertion Loss and the hot spot accurate adjustment optical fiber collimator, so as to improve the precision and accuracy of the rear cut-off distance regulation to optical fiber collimator.A kind of adjuster 60 that the present invention is provided, as shown in fig. 6, the adjuster 60 includes：Processor (processor) 61, communication interface (Commun i ca tions Interface) 62, memory（Memory) 63 and communication bus 64;Wherein, the processor 61, the communication interface 62 and the memory 63 complete mutual communication by the communication bus 64.
Processor 61 is probably a central processor CPU, either specific integrated circuit ASIC (Application Specific Integrated Circuit), or oneself is set to the one or more integrated circuits for implementing the embodiment of the present invention by the tenth of the twelve Earthly Branches.
Memory 63 is used to deposit program code, and described program code includes computer-managed instruction.Memory 63 may include high-speed RAM memory, it is also possible to also including nonvolatile memory (non-volat i le memory), for example, at least one magnetic disk storage.
The communication interface 62, for realizing the connection communication between these devices.
The configuration processor code of processor 61, rear cut-off distance for adjusting optical fiber collimator, to reach reflector by the optical signal of the optical fiber collimator, the optical signal is reflexed to the first photodetector by the reflector by the optical fiber collimator, to cause first photodetector to obtain the Insertion Loss of the optical fiber collimator according to the optical signal, the reflector sends the optical signal to the second photodetector, to cause second photodetector to obtain the hot spot of the optical signal according to the optical signal, and when the radius of the default Insertion Loss of Insertion Loss satisfaction and the hot spot meets target spot radius, it is determined that current rear cut-off distance is the work rear cut-off distance of the optical fiber collimator.
Alternatively, the processor 61 is additionally operable to, and determines that the target spot radius that the radius of the hot spot is met are by formula
Obtain；Wherein, ζ is with a tight waist distance of second photodetector to the optical signal,ω(ζ) it is the target spot radius,ω.For target waist radius, Α represents the wavelength of the optical signal, is Round frequencies.
It is described above; only embodiment of the invention, but protection scope of the present invention is not limited thereto, any one skilled in the art the invention discloses technical scope in; change or replacement can be readily occurred in, should be all included within the scope of the present invention.Therefore, protection scope of the present invention described should be defined by scope of the claims.
Claims (9)
- Claims1st, a kind of system for adjusting optical fiber collimator, it is characterised in that including optical transmitting set, optical fiber collimator, reflector, the first photodetector, the second photodetector and adjuster；The optical transmitting set, for sending optical signal to the optical fiber collimator；The optical fiber collimator, for sending the optical signal to the reflector by light path, wherein, the reflector is located at the with a tight waist of the optical signal；The reflector, for the optical signal to be reflexed into first photodetector by the optical fiber collimator, and the optical signal is sent to second photodetector；First photodetector, the optical signal for being reflected according to the reflector obtains the Insertion Loss of the optical fiber collimator；Second photodetector, for receiving the optical signal that the reflector is sent, and obtains the corresponding hot spot of the optical signal；The adjuster, the rear cut-off distance for adjusting the optical fiber collimator meets target spot radius with the radius for causing the Insertion Loss to meet default Insertion Loss and the hot spot.2nd, the system according to claim 1, it is characterized in that, the reflector includes partial mirror, the partial mirror specifically for, the Part I of the optical signal is reflexed into first photodetector by the optical fiber collimator, and the Part II of the optical signal is sent to second photodetector.3, system according to claim 1 or 1, it is characterized in that, the adjuster specifically for, adjust the rear cut-off distance of the optical fiber collimator, to cause the radius of the hot spot to meet the target spot radius, wherein, the target spot radius are the distances with a tight waist according to second photodetector to the optical signal, what the wavelength of target waist radius and the optical signal was obtained, the target waist radius is that the rear cut-off distance determined according to operating distance is obtained, the operating distance is the optical fiber collimator of transmitting terminal and the distance between the optical fiber collimator of receiving terminal.4th, system according to claim 3, it is characterised in that the adjuster specifically for, adjust the rear cut-off distance of the optical fiber collimator, to cause the radius of the hot spot to meet the target spot radius, wherein, the target spot radius pass through formulaω2 (ζ) = ω0 2[1 + (—^γ)2 ] Obtain；Wherein, z be second photodetector to the distance with a tight waist of the optical signal, be the target spot radius,ω.For the target waist radius, Α represents the wavelength of the optical signal, is Round frequencies.5th, a kind of method for adjusting optical fiber collimator, it is characterised in that including：Adjust the rear cut-off distance of optical fiber collimator, to reach reflector by the optical signal of the optical fiber collimator, the optical signal is reflexed to the first photodetector by the reflector by the optical fiber collimator, to cause first photodetector to obtain the Insertion Loss of the optical fiber collimator according to the optical signal, the reflector sends the optical signal to the second photodetector, to cause second photodetector to obtain the hot spot of the optical signal according to the optical signal；When the radius of the default Insertion Loss of Insertion Loss satisfaction and the hot spot meets target spot radius, it is determined that current rear cut-off distance is the work rear cut-off distance of the optical fiber collimator.6th, the method according to claim 5, it is characterized in that, the reflector includes partial mirror, so that the Part I of the optical signal is reflexed to first photodetector by the partial mirror by the optical fiber collimator, and the Part II of the optical signal is sent to second photodetector.7th, the method according to claim 5 or 6, it is characterised in that the target spot radius are by formulaω2 (ζ) = ω0 2[1 + (—^)2] obtain；Wherein, ζ is with a tight waist distance of second photodetector to the optical signal,ω(ζ) it is the target spot radius,ω.For target waist radius, Α represents the wavelength of the optical signal, is Round frequencies.8th, a kind of adjuster, it is characterised in that including：Adjustment unit, rear cut-off distance for adjusting optical fiber collimator, to reach reflector by the optical signal of the optical fiber collimator, the optical signal is reflexed to the first photodetector by the reflector by the optical fiber collimator, to cause first photodetector to obtain the Insertion Loss of the optical fiber collimator according to the optical signal, the reflector sends the optical signal to the second photodetector, to cause second photodetector to obtain the hot spot of the optical signal according to the optical signal；Determining unit, the radius for meeting default Insertion Loss and the hot spot in the Insertion Loss meets target During spot radius, it is determined that current rear cut-off distance is the work rear cut-off distance of the optical fiber collimator.9th, the adjuster according to claim 8, it is characterised in that the determining unit is specifically for determining that the target spot radius that the radius of the hot spot is met are by formulaω2 (ζ) = ω0 2[1 + (—^)2] obtain；Wherein, ζ be second photodetector to the distance with a tight waist of the optical signal, be the target spot radius,ω.For target waist radius, Α represents the wavelength of the optical signal, is Round frequencies.
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| CN112859360A (en) * | 2021-01-15 | 2021-05-28 | 深圳市鍂鑫科技有限公司 | Debugging method based on collimator coupling system |
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| CN108205175A (en) * | 2016-12-20 | 2018-06-26 | 华为机器有限公司 | A kind of optical switching device |
| CN106500964B (en) * | 2016-12-30 | 2019-03-15 | 上海中科光纤通讯器件有限公司 | The hot spot machine debugging system and method for middle long reach single mode single optical fiber calibrator |
| US11307367B2 (en) | 2020-08-17 | 2022-04-19 | X Development Llc | Method of precision beam collimation using fiber-optic circulator and wavelength tunable source |
| CN112198597B (en) * | 2020-09-30 | 2022-07-15 | 浙江光塔安全科技有限公司 | Optical fiber coupling adjusting method |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN105393163B (en) | 2017-12-01 |
| WO2015074205A1 (en) | 2015-05-28 |
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