CN203217188U - Optical fiber coupler - Google Patents
Optical fiber coupler Download PDFInfo
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- CN203217188U CN203217188U CN 201320153410 CN201320153410U CN203217188U CN 203217188 U CN203217188 U CN 203217188U CN 201320153410 CN201320153410 CN 201320153410 CN 201320153410 U CN201320153410 U CN 201320153410U CN 203217188 U CN203217188 U CN 203217188U
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- polarized light
- fiber coupler
- linearly polarized
- wave plate
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Abstract
The utility model provides an optical fiber coupler realizing continuously adjustable output and reflection proportions. The optical fiber coupler is successively provided with a double-optical-fiber collimator, a lens, a polarization beam-splitting apparatus, a phase delay apparatus and a reflector along an optical path direction. The phase delay apparatus is phase time-delay adjustable and is adjusted to obtain different elliptically polarized light and then the polarization beam-splitting apparatus can divide the elliptically polarized light into different proportions of linearly polarized light, so that continuously adjustable laser output and reflection proportions are realized. Aiming at different change of excitation sources, the output and reflection proportions of the optical fiber coupler are adjusted, so that an output effect is optimized and improved.
Description
Technical field
The utility model relates to laser field, relates in particular to a kind of laser output and fiber coupler that reflects adjustable ratio realized.
Background technology
Laser instrument is the device that utilizes the stimulated radiation principle that light is amplified in the material that some is stimulated or vibrate and launch, laser instrument occupies extremely important status in laser is used at present, can be used for materials processing, laser ranging, laser spectroscopy, laser medicine, laser chemical industry, laser isotope separation and laser fusion etc.
The three elements that form laser are working-laser material, driving source resonant cavity.Resonator cavity generally is made up of two-face mirror, and the laser that is sent by driving source constantly comes and goes between two-face mirror, when laser comes and goes constantly and the particle of being excited of working-laser material meet, be excited particle generation transition to produce photon radiation then.Along with photon will constantly be bred, when photon forms direction of propagation unanimity, frequency and phase place when identical during strong beam in the chamber, this strong beam just is called laser.
For laser is drawn outside the resonator cavity, prior art is that catoptron is wherein made the catoptron with part transmission function, this face catoptron is commonly called partially reflecting mirror, the part that transmission is gone out in the laser is can the actual laser that utilizes, and the part that reflects back into resonator cavity is stayed and continued in the resonator cavity and working-laser material propagation photon.This shows that the ratio between the transmission of partially reflecting mirror and the reflection that is to say that inverse proportion can directly have influence on the intensity of laser output.If the reflector laser ratio is too high, the intensity that then causes exporting laser reduces, the reflector laser ratio is low excessively, photon proliferate efficiency in the resonator cavity descends thereupon, the intensity that equally also can cause exporting laser reduces, so saturating inversely proportional control is important problem of laser field, need average out at saturating inverse proportion, could obtain best output power.
In the debugging of traditional laser instrument, need to change different saturating inversely proportional partially reflecting mirrors, again according to repeatedly test result, thereby could determine that the more excellent inversely proportional partially reflecting mirror that has in the sample portion catoptron is applied in the laser instrument.
But owing to the reflectivity of partially reflecting mirror is not continuous variation, so be difficult to obtain optimum coupling ratio, meanwhile, laser instrument is arranged in the resonator cavity owing to partially reflecting mirror in the back that completes, so partially reflecting mirror is not generally changed.And wearing out along with driving source, need to change the optimum output power that a different partially reflecting mirror could guarantee laser instrument this moment again, but because partially reflecting mirror is difficult to change, so laser performance can only descend thereupon, and can not make certain adjustment in real time.
Summary of the invention
The purpose of this utility model provides a kind of realization output and the continuously adjustable fiber coupler of reflection ratio.
In order to realize above-mentioned purpose, the utility model provides a kind of fiber coupler, this fiber coupler is disposed with double-fiber collimator, lens, polarization beam splitting device, phase delaying device and catoptron at it along optical path direction, and wherein phase delaying device is the adjustable phase delaying device of phase place time-delay.
By such scheme as seen, can obtain the polarized light of different polarization states by the phase place time-delay of control phase deferred mount, the linearly polarized light that by the polarization beam splitting device polarized light can be divided into the different polarization component proportion again, thereby laser output and reflection tunable have been realized, along with the difference of driving source changes the coupling ratio of fiber coupler is regulated, made the output effect improvement that is optimized.
Further scheme is the mechanical runner that phase delaying device comprises quarter-wave plate and quarter-wave plate is housed.
Therefore, mechanical runner by quarter-wave plate is housed is as phase delaying device, can drive the rotation of quarter-wave plate to obtain the elliptically polarized light of different angles by mechanical runner, the elliptically polarized light of different angles is divided into two bunch polarized lights of different polarization component proportion again by the polarization beam splitting device, realize that laser output and reflection ratio are adjustable continuously.
Further scheme is that mechanical runner comprises: bearing bridge comprises rotating shaft; Bearing is enclosed within the rotating shaft; The wave plate support is provided with installing port and mounting hole along its axis direction, and mounting hole is enclosed within on the bearing, and quarter-wave plate is installed in the installing port.
Therefore, mechanical runner by said structure, utilize advantages such as its frictional resistance of bearing is little, startup is sensitive, efficient is high, simple and easy assembling, can make things convenient for to such an extent that drive the rotation that quarter-wave plate is realized the wave plate different angles by the rotational wave plate rack, thereby obtain the elliptically polarized light of different angles.
Further scheme is, bearing bridge also has the back up pad of supporting revolving shaft, and rotating shaft and back up pad are provided with the through hole that runs through rotating shaft and back up pad, and installing port and through hole connect.
Therefore, be installed in the fiber coupler by this back up pad that has through hole, realized simple and easy installation, and fixing the wave plate support effectively.
Further scheme is that phase delaying device comprises electro-optic crystal and the electro-optic crystal two ends applied the operating circuit of operating voltage.
Therefore, phase delaying device not only can adopt quarter-wave plate to carry out phase delay, can also adopt electro-optic crystal to carry out phase delay, concrete mode is that electro-optic crystal is applied certain voltage, can be by changing the voltage that electro-optic crystal is applied, realization is to the change of polarisation of light direction, thereby the elliptically polarized light of acquisition different angles can realize that equally laser output and reflection ratio are adjustable continuously.
Further scheme is that the polarization beam splitting device is wollaston prism.
This shows, adopt wollaston prism as the polarization beam splitting device, because wollaston prism can be realized polarization beam splitting, the degree of polarization height, and also wollaston prism is simple in structure, and easy to process, can reduce cost.
Further scheme is that the polarization beam splitting device is Rochon prism.
This shows that Rochon prism is similar to the wollaston prism principle of work, have simple in structurely, easy to process equally, can reduce cost.
Description of drawings
Fig. 1 is the utility model first embodiment one-piece construction figure.
Fig. 2 is the utility model first embodiment phase delaying device structural drawing.
Fig. 3 is the utility model first embodiment light path principle figure.
Fig. 4 is that the utility model first embodiment is at Z01-Z04 position polarization state synoptic diagram.
Fig. 5 is that the utility model first embodiment is at Z05-Z08 position polarization state synoptic diagram.
Fig. 6 is the utility model second embodiment one-piece construction figure.
Fig. 7 is the utility model second embodiment light path principle figure.
Fig. 8 is that the utility model second embodiment is at Z11-Z14 position polarization state synoptic diagram.
Fig. 9 is that the utility model second embodiment is at Z15-Z16 position polarization state synoptic diagram.
The utility model is described in further detail below in conjunction with drawings and Examples.
Embodiment
First embodiment:
With reference to Fig. 1, Fig. 1 is the first embodiment one-piece construction figure of the utility model fiber coupler.Fiber coupler is disposed with double-fiber collimator 11, lens 12, polarization beam splitting device, phase delaying device 14 and catoptron 15 in the direction along light path, wherein, phase delaying device 14 is the adjustable phase delaying device of phase place time-delay, and the polarization beam splitting device is wollaston prism 13.
Two parallel optical fiber are installed in the double-fiber collimator 11, be respectively incident optical and outgoing optical fiber, input line polarized light L1 from the external world through incident optical incident, polarization light output L2 is from the outgoing of outgoing optical fiber, linearly polarized light L1 outputs to wollaston prism 13 through lens 12 collimations after the input port input of incident optical, linearly polarized light L1 is output phase deferred mount 14 after wollaston prism 13 is adjusted angle, linearly polarized light L1 carries out outputing to catoptron 15 after the phase delay through phase delaying device 14, after reflecting away from catoptron 15, reflected light L4 carries out outputing to wollaston prism 13 after the phase delay through phase delaying device 14 again, wollaston prism 13 plays the beam splitting effect, tell linearly polarized light L2 and linearly polarized light L3, linearly polarized light L2 is through the output port output of lens 12 backs by outgoing optical fiber, and linearly polarized light L3 is through the input port output of lens 12 by incident optical.The polarization direction of linearly polarized light L1 is vertical mutually with the polarization direction of linearly polarized light L2, and the polarization direction of linearly polarized light L2 is vertical mutually with the polarization direction of linearly polarized light L3.
With reference to Fig. 2, Fig. 2 is the structural drawing that the utility model first embodiment can carry out the delay adjusted phase delaying device 14 of phase place.Phase delaying device 14 comprises quarter-wave plate 144 and the mechanical runner of quarter-wave plate 144 is housed, this machinery runner has bearing bridge 141, bearing bridge 141 comprises rotating shaft 22, back up pad 21 and runs through rotating shaft 22 and the through hole 23 of back up pad 21, bearing bridge 141 also has bearing 142, and bearing 142 is enclosed within the rotating shaft 22.And, bearing bridge 141 also is provided with wave plate support 143, and wave plate support 143 is provided with installing port 24 and mounting hole 25 along its axis direction, and mounting hole 25 is enclosed within on the bearing 142, installing port 24 connects with through hole 23, and quarter-wave plate 144 is installed in the installing port 24 of wave plate support 143.Can drive the rotation of quarter-wave plate 144 by rotational wave plate rack 143, realize that quarter-wave plate 144 rotates at any angle around the axis of bearing 142.
With reference to Fig. 3, Fig. 3 is the light path principle figure of the utility model fiber coupler first embodiment.Linearly polarized light L1 draws the back by the input port input of double-fiber collimator 11 incident opticals from laser resonant cavity, outputs to wollaston prism 13 through lens 12 collimations, through wollaston prism 13 adjusting angles and output.
With reference to Fig. 4 and Fig. 5, the polarization state synoptic diagram of Fig. 4 and Fig. 5 is the polarization state synoptic diagram of seeing in face of the direction of propagation of linearly polarized light L1.The polarization state of the linearly polarized light L1 of linearly polarized light L1 process wollaston prism 13 outputs is shown in Z01, and it is parallel to paper and vertical with the direction of propagation of line polarisation L1.Then, linearly polarized light L1 carries out the phase place delay process through the quarter-wave plate 144 in the phase place time-delay mechanism 14, realize rotating quarter-wave plate 144 by rotational wave plate rack 143, make the optical axis of quarter-wave plate 144 and the polarization state of linearly polarized light L1 form the angle α shown in Z02.Subsequently, linearly polarized light L1 penetrates the back because through the phase place time-delay, it is sin for major axis shown in Z03 that linearly polarized light decomposes polarization state from quarter-wave plate 144
2α and minor axis are cos
2The right-handed elliptical polarization light of α, its right-handed elliptical polarization light outputs to catoptron 15.
Because there is half-wave loss in right-handed elliptical polarization light through behind the catoptron 15, therefore catoptron 15 reflected light L4 that right-handed elliptical polarization light reflection back is formed becomes left-handed elliptically polarized light shown in Z04, reflected light L4 incides quarter-wave plate 144 subsequently, and the polarization state of the light beam of formation is shown in Z05.Light beam carries out phase place time-delay output polarization attitude linearly polarized light L5 shown in Z06 through quarter-wave plate 144, and the angle that its polarization direction and vertical direction form is 2 α.Linearly polarized light L5 injects wollaston prism 13 subsequently.
Wollaston prism 13 is to be formed by the right angle kalzit gummed that the optical axis right angle kalzit that is vertical direction and optical axis are horizontal direction, its principle of work is to utilize the direction of optic axis difference, after making light wave through the interface, direction of vibration changes, thereby the light wave of different direction of vibration is separated in the space.
Use above-mentioned wollaston prism polarization beam splitting principle that linearly polarized light L5 is carried out polarization beam splitting because the optical axis included angle of linearly polarized light L5 and vertical direction is 2 α, so be divided into polarization state shown in Z08, intensity is tg
2The linearly polarized light L2 of 2 α and polarization state shown in Z07, intensity is ctg
2The linearly polarized light L3 of 2 α.From Fig. 3 as seen, the polarization direction of linearly polarized light L3 is parallel to paper and perpendicular to its direction of propagation, the polarization direction of linearly polarized light L2 is perpendicular to paper and perpendicular to its direction of propagation.Output port output to the outgoing optical fiber of double-fiber collimator 11 utilizes for actual linearly polarized light L2 through lens 12, and linearly polarized light L3 continues the propagation photon through lens 12 in the input port output return laser light device resonator cavity of the incident optical of double-fiber collimator 11.
By the first above-mentioned embodiment, form a α angle with linearly polarized light by rotating quarter-wave plate 144, realize that at last output and the ratio that reflects are tg
22 α: ctg
22 α have realized that simultaneously this output is adjustable continuously with the ratio of reflection.
Second embodiment:
With reference to Fig. 6, Fig. 6 is the second embodiment one-piece construction figure of the utility model fiber coupler.Fiber coupler is disposed with double-fiber collimator 61, lens 62, polarization beam splitting device, phase delaying device and catoptron 65 in the direction along light path, wherein, phase delaying device is the adjustable phase delaying device of phase place time-delay, and phase delaying device comprises electro-optic crystal 64 and electro-optic crystal 64 is applied the operating circuit 66 of operating voltage that the polarization beam splitting device is wollaston prism 63.
Two incident opticals that are parallel to each other and outgoing optical fiber are installed in the double-fiber collimator 61, and input line polarized light L6 is through the input port incident of incident optical, and polarization light output L7 is through the output port outgoing of outgoing optical fiber.Linearly polarized light L6 outputs to wollaston prism 63 through lens 62 collimations after the input port input, linearly polarized light L6 exports after wollaston prism 63 is adjusted angle, linearly polarized light L6 carries out inciding catoptron 65 after the phase delay through electro-optic crystal 64, carries out after the phase delay to wollaston prism 63 through electro-optic crystal 64 after reflected light L9 reflects away from catoptron 65 again.
Wollaston prism 63 is to be formed by the right angle kalzit gummed that the optical axis right angle kalzit that is vertical direction and optical axis are horizontal direction, its principle of work is to utilize the direction of optic axis difference, after making light wave through the interface, direction of vibration changes, thereby the light wave of different direction of vibration is separated in the space.
Use above-mentioned wollaston prism polarization beam splitting principle that beam reflected is carried out polarization beam splitting, be divided into the orthogonal linearly polarized light L7 of polarization state and linearly polarized light L8, linearly polarized light L7 is exported by output port through lens 62 backs.Linearly polarized light L8 is exported by input port through lens 62.The polarization direction of linearly polarized light L6 is vertical mutually with the polarization direction of linearly polarized light L7, and the polarization direction of linearly polarized light L7 is vertical mutually with the polarization direction of linearly polarized light L8.
With reference to Fig. 7, Fig. 7 is the light path principle figure of the utility model fiber coupler second embodiment.Linearly polarized light L6 draws the back by the input port input of double-fiber collimator 61 from laser resonant cavity, outputs to wollaston prism 63 through lens 62 collimations, through wollaston prism 63 adjusting angles and output.
With reference to Fig. 8 and Fig. 9, the polarization state synoptic diagram of Fig. 8 and Fig. 9 is the polarization state synoptic diagram of seeing gained in face of the direction of propagation of linearly polarized light L6.The linearly polarized light L6 polarization state of linearly polarized light L6 process wollaston prism 63 outputs is shown in Z11, it is for being parallel to paper and perpendicular to the linearly polarized light L6 direction of propagation, then, linearly polarized light L6 carries out the phase place delay process through the electro-optic crystal 64 in the phase place time-delay mechanism.Because 66 pairs of electro-optic crystals of operating circuit have applied certain voltage, have caused linearly polarized light L6 in the refractive index of electro-optic crystal variation to take place, thereby realized the phase place of linearly polarized light L6 is delayed time.By to electro-optic crystal output services voltage, make linearly polarized light L6 through output right-handed elliptical polarization light behind the electro-optic crystal, the right-handed elliptical polarization polarization state of light is shown in Z12, and it is that major axis is sin
2α and minor axis are cos
2The right-handed elliptical polarization light of α, its right-handed elliptical polarization light outputs to catoptron 65.
Because there is half-wave loss in right-handed elliptical polarization light through catoptron 65, catoptron 65 reflects the reflected light L9 polarization state of back formation shown in Z13 with right-handed elliptical polarization light, it becomes left-handed elliptically polarized light, reflected light L4 injects electro-optic crystal 64 subsequently, carry out the linearly polarized light L10 of phase place time-delay output polarization attitude shown in Z14 through electro-optic crystal 64 again, the angle that its polarization direction and vertical direction form is 2 α.Linearly polarized light L10 injects wollaston prism 63 subsequently, and 63 couples of linearly polarized light L10 of wollaston prism carry out polarization beam splitting because the optical axis included angle of linearly polarized light L10 and wollaston prism 63 is 2 α, so be divided into polarization state shown in Z16, intensity is tg
2The linearly polarized light L7 of 2 α and polarization state shown in Z15, intensity is ctg
2The linearly polarized light L8 of 2 α.Output port output to double-fiber collimator 61 utilizes for actual linearly polarized light L7 through lens 62, and linearly polarized light L8 continues the propagation photon through lens 62 in the input port output return laser light device resonator cavity of double-fiber collimator 61.
By the second above-mentioned embodiment, utilize to change the operating voltage that electro-optic crystal is applied, realize that at last output and the ratio of reflection are tg
22 α: ctg
22 α have realized that simultaneously this output is adjustable continuously with the ratio of reflection.
Utilize in the fiber coupler by above-described embodiment and to have realized output adjustable continuously with the ratio of reflection to the adjusting of phase place time-delay mechanism and the application of polarization beam splitting device, along with the difference of driving source changes the phase place time-delay mechanism of fiber coupler is regulated, made the output effect improvement that is optimized.
It is emphasized that at last; above-described embodiment is two preferred embodiments of the present utility model; other the polarization beam splitting device as this class of employing Rochon prism perhaps adopts the phase place time-delay mechanism of other adjustable phases time-delays all within protection domain of the present utility model.
Claims (7)
1. fiber coupler,
It is being disposed with double-fiber collimator, lens, polarization beam splitting device, phase delaying device and catoptron along optical path direction;
It is characterized in that:
Described phase delaying device is the adjustable phase delaying device of phase place time-delay.
2. fiber coupler according to claim 1 is characterized in that:
The rotating mechanical runner that described phase delaying device comprises quarter-wave plate and described quarter-wave plate is housed.
3. fiber coupler according to claim 2 is characterized in that:
Described mechanical runner comprises
Bearing bridge comprises rotating shaft;
Bearing is enclosed within the described rotating shaft;
The wave plate support is provided with installing port and mounting hole along its axis direction, and described mounting hole is enclosed within on the described bearing, and described quarter-wave plate is installed in the described installing port.
4. fiber coupler according to claim 3 is characterized in that:
Described bearing bridge also has the back up pad that supports described rotating shaft, and described rotating shaft and described back up pad are provided with the through hole that runs through described rotating shaft and described back up pad, and described installing port and described through hole connect.
5. fiber coupler according to claim 1 is characterized in that:
Described phase delaying device comprises electro-optic crystal and described electro-optic crystal two ends is applied the operating circuit of operating voltage.
6. according to each described fiber coupler of claim 1 to 5, it is characterized in that:
Described polarization beam splitting device is wollaston prism.
7. according to each described fiber coupler of claim 1 to 5, it is characterized in that:
Described polarization beam splitting device is Rochon prism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320153410 CN203217188U (en) | 2013-03-29 | 2013-03-29 | Optical fiber coupler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320153410 CN203217188U (en) | 2013-03-29 | 2013-03-29 | Optical fiber coupler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203217188U true CN203217188U (en) | 2013-09-25 |
Family
ID=49206713
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320153410 Expired - Lifetime CN203217188U (en) | 2013-03-29 | 2013-03-29 | Optical fiber coupler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203217188U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103197431A (en) * | 2013-03-29 | 2013-07-10 | 光库通讯(珠海)有限公司 | Optical fiber coupler |
| WO2018072068A1 (en) * | 2016-10-18 | 2018-04-26 | 华为技术有限公司 | Optocoupler device and method for controlling same |
-
2013
- 2013-03-29 CN CN 201320153410 patent/CN203217188U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103197431A (en) * | 2013-03-29 | 2013-07-10 | 光库通讯(珠海)有限公司 | Optical fiber coupler |
| WO2018072068A1 (en) * | 2016-10-18 | 2018-04-26 | 华为技术有限公司 | Optocoupler device and method for controlling same |
| US10948655B2 (en) | 2016-10-18 | 2021-03-16 | Huawei Technologies Co., Ltd. | Optical coupling apparatus and control method thereof |
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Legal Events
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: ZHUHAI AFR TECHNOLOGY CO., LTD. Free format text: FORMER NAME: ADVANCED FIBER RESOURCE (ZHUHAI) CO., LTD. |
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| CP01 | Change in the name or title of a patent holder |
Address after: 519030 Guangdong city of Zhuhai Province Tang software Road No. B5 Building 2 floor Patentee after: ADVANCED FIBER RESOURCES (ZHUHAI) Ltd. Address before: 519030 Guangdong city of Zhuhai Province Tang software Road No. B5 Building 2 floor Patentee before: Optical Library Communications (Zhuhai) Co.,Ltd. |
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| C56 | Change in the name or address of the patentee | ||
| CP02 | Change in the address of a patent holder |
Address after: 519030, 1, 1-6, 8 and two, 5 production center, software Road, Guangdong, Zhuhai, China Patentee after: ADVANCED FIBER RESOURCES (ZHUHAI) Ltd. Address before: 519030 Guangdong city of Zhuhai Province Tang software Road No. B5 Building 2 floor Patentee before: ADVANCED FIBER RESOURCES (ZHUHAI) LTD. |
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Granted publication date: 20130925 |