CN107390329B - A kind of unidirectional TAP PD - Google Patents
A kind of unidirectional TAP PD Download PDFInfo
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- CN107390329B CN107390329B CN201710738036.3A CN201710738036A CN107390329B CN 107390329 B CN107390329 B CN 107390329B CN 201710738036 A CN201710738036 A CN 201710738036A CN 107390329 B CN107390329 B CN 107390329B
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- lens
- beam splitting
- optical fiber
- splitting lens
- light
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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
- G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
- G02B6/4206—Optical features
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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
- G02B6/4286—Optical modules with optical power monitoring
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Couplings Of Light Guides (AREA)
Abstract
The invention discloses a kind of unidirectional TAP PD, including entering to hold optical fiber, fiber connector, beam splitting lens, detector assembly and outlet optical fiber, enter to hold optical fiber and outlet optical fiber to be arranged in two hole of fiber connector, beam splitting lens is arranged between fiber connector and detector assembly；Beam splitting lens wears into α degree angle towards fiber connector one end, and beta angle is worn into one end part of beam splitting lens towards detector assembly；α and beta angle be not so that the light for entering to hold optical fiber to input has the position for wearing into beta angle to come out perpendicular to beam splitting lens, the light of outlet optical fiber input is totally reflected wearing into beta angle position.Two-beam line is transferred to before detector assembly the lens that have been split and separates, and the light for entering to hold optical fiber to transmit is detected apparatus assembly and receives, and the seldom detected device assembly of the light of outlet optical fiber transmission receives, to realize high directivity.The present invention is divided by the beam splitting lens of angle lap, has structure simple, the at low cost and high feature of directionality.
Description
Technical field
The present invention relates to technical field of photo communication more particularly to a kind of unidirectional TAP PD.
Background technique
TAP PD is optical power detector, it is widely used in optical fiber telecommunications system, is carried out to the power of optical signal
Line monitoring, to realize the power monitoring to optical signal and management.The light that output optical fibre is returned regardless of the TAP PD of directionality
It is not limited, the optical power of this detector detection is easy to be reflected shadow sound, and in order to avoid the influence of reflected light, optical fiber is logical
Letter system much requires unidirectional TAP PD.
Regardless of directionality TAP PD mainly by input-output optical fiber contact pin 10, collimation lens 11, light splitting piece 12, detector group
Part 13, aligned sleeves 14 and fixed sleeving 15 form, and such as Fig. 1, on this basis, unidirectional TAP PD design scheme also compare
It is more, add imaging len, mask, spacer, big spacing contact pin or angle of wedge piece to be divided designing regardless of directionality.Such as it discloses
Number be 7333693 U.S. Patent Publication of US a kind of optical power detector, be divided using imaging len；Publication No. CN
A kind of optical power detector disclosed in the Chinese patent of 102043209B, is divided using mask or spacer；Publication No. CN
A kind of optical power detector disclosed in the Chinese patent of 201100946Y is divided using big spacing contact pin, small detector photosurface
Light；A kind of optical power detector disclosed in the Chinese patent of Publication No. CN 204422827, using dark fibre increase optical fiber away from
From being divided；A kind of optical power detector disclosed in the Chinese patent of Publication No. CN 204790086, using angle of wedge piece and every
It is divided from chamber.But the disadvantage that generally existing structure is complicated, expensive, directionality is poor.
Summary of the invention
A kind of unidirectional TAP PD that the present invention designs is divided by the beam splitting lens of angle lap, has structure simple,
The cheap and high feature of directionality.
The technical solution adopted by the invention is as follows:
A kind of unidirectional TAP PD, including enter to hold optical fiber, fiber connector, beam splitting lens, detector assembly and outlet
Optical fiber,
It is described to enter one end of optical fiber and one end of outlet optical fiber is held to be separately positioned in two hole of fiber connector, the light splitting
Lens are arranged between fiber connector and detector assembly；One end of the beam splitting lens towards fiber connector is denoted as light splitting
Lens front, wears into α degree angle, and one end of the beam splitting lens towards detector assembly is denoted as beam splitting lens rear end, the light splitting
Lens rear is divided into two parts, and a portion wears into beta angle；The α and beta angle of the beam splitting lens setting are so as to enter to hold optical fiber
The position that the light of input does not wear into beta angle perpendicular to beam splitting lens rear end comes out, the light of outlet optical fiber input is being divided
The position that lens rear wears into beta angle is totally reflected.
It wherein, further include condenser lens, lens casing, lens contact pin casing, total tubing,
The condenser lens is arranged between fiber connector and beam splitting lens, and the condenser lens and beam splitting lens pass through
Lens casing is fixedly connected；The fiber connector is fixedly connected with condenser lens by lens contact pin casing；The lens are inserted
Needle cannula is fixedly connected with detector assembly by total tubing.
Wherein, the condenser lens is G lens, and planar ends are coated with spectro-film.
Wherein, the beam splitting lens front end is coated with anti-reflection film.
Wherein, the beam splitting lens rear end is using its center line as boundary, and wherein top half wears into beta angle.
Wherein, it is described enter to hold optical fiber, outlet optical fiber be single mode optical fiber.
Wherein, the optic fibre hole pitch of holes of the fiber connector is between 125um to 250um.
Wherein, the lens casing, lens contact pin shell material can be with any one in glass, metal or ceramics；Institute
Stating general assembly shell material is metal.
Wherein, it is described enter hold optical fiber to input light by the angle after condenser lens with horizontal direction be respectively θ1, then α
Angle and θ1Relationship are as follows:
θ1=α-arccos [n1cosα/n0]
Wherein, n0It is medium refraction index between condenser lens and beam splitting lens, n1It is beam splitting lens refractive index.
Wherein, the light of the outlet optical fiber input is θ by the angle after condenser lens with horizontal direction2, then the angle β with
θ2Relationship are as follows:
θ2=arccos [n1/no*cos(α+β-arcsin(no/n1))]-α
Wherein, n0It is medium refraction index between condenser lens and beam splitting lens, n1It is beam splitting lens refractive index.
The utility model has the advantages that
The present invention provides a kind of unidirectional TAP PD, including enter to hold optical fiber, fiber connector, beam splitting lens, detection
Device assembly and outlet optical fiber, it is described to enter one end of optical fiber and one end of outlet optical fiber is held to be separately positioned on two hole of fiber connector
Interior, the beam splitting lens is arranged between fiber connector and detector assembly；The beam splitting lens is towards fiber connector one
End is denoted as beam splitting lens front end, α degree angle is worn into, after one end of the beam splitting lens towards detector assembly is denoted as beam splitting lens
End, the beam splitting lens rear end are divided into two parts, and a portion wears into beta angle；The α and beta angle of the beam splitting lens so that
Enter to hold optical fiber input light perpendicular to beam splitting lens rear end do not wear into beta angle position come out, outlet optical fiber input light
Line is totally reflected in the position that beta angle is worn into beam splitting lens rear end.As it can be seen that two-beam line is transferred to before detector assembly
The lens that are split separate, and the light for entering to hold optical fiber to transmit is detected apparatus assembly and receives, and the light of outlet optical fiber transmission is very
It is detected device assembly less to receive, to realize high directivity.The present invention is divided by angle lap lens, has structure simple,
The cheap and high feature of directionality.
Detailed description of the invention
Fig. 1 is the structural schematic diagram regardless of directionality TAP PD.
Fig. 2 is the structural schematic diagram of unidirectional TAP PD provided by the invention a kind of.
Fig. 3 is 21 sectional view of fiber connector provided by the invention.
Fig. 4 is 23 structural schematic diagram of beam splitting lens provided by the invention.
Fig. 5 is 23 light splitting optical path figure of beam splitting lens provided by the invention.
Fig. 6 is the index path provided by the invention for calculating 23 angle α of beam splitting lens.
Fig. 7 is the index path provided by the invention for calculating 23 angle β of beam splitting lens.
In figure:
10- input-output optical fiber contact pin；11- collimation lens；12- light splitting piece；13- detector assembly；14- aligned sleeves；
15- fixed sleeving；
20- enters to hold optical fiber；21- fiber connector；22- condenser lens；23- beam splitting lens；24- detector assembly；25- is saturating
Mirror sleeve pipe；26- lens contact pin casing；The total tubing of 27-；28- outlet optical fiber.
Specific embodiment
Technical solution of the present invention is described in detail with reference to the accompanying drawings and examples.
Fig. 2 is the structural schematic diagram of unidirectional TAP PD provided by the invention a kind of.Fig. 4 is light splitting provided by the invention
23 structural schematic diagram of lens.Fig. 5 is 23 light splitting optical path figure of beam splitting lens provided by the invention.As shown in Fig. 2, Fig. 4, Fig. 5, this hair
A kind of bright unidirectional TAP PD, including enter to hold optical fiber 20, fiber connector 21, beam splitting lens 23, detector assembly
24 and outlet optical fiber 28,
It is described to enter one end of optical fiber 20 and one end of outlet optical fiber 28 is held to be separately positioned in 21 liang of holes of fiber connector, institute
Beam splitting lens 23 is stated to be arranged between fiber connector 21 and detector assembly 24；The beam splitting lens 23 is towards fiber connector
21 one end is denoted as 23 front end of beam splitting lens, wears into α degree angle, and one end of beam splitting lens 23 towards the detector assembly 24 is denoted as
23 rear end of beam splitting lens, 23 rear end of beam splitting lens are divided into two parts, and a portion wears into beta angle；The beam splitting lens
The α and beta angle of 23 settings be not so that the light for entering to hold optical fiber 20 to input wears into the position of beta angle perpendicular to 23 rear end of beam splitting lens
It sets out, the light that outlet optical fiber 28 inputs is totally reflected in the position that beta angle is worn into 23 rear end of beam splitting lens.
Further, as shown in Fig. 2, further including condenser lens 22, lens casing 25, lens contact pin casing 26, total encapsulation
Pipe 27,
The condenser lens 22 is arranged between fiber connector 21 and beam splitting lens 23, the condenser lens 22 and light splitting
Lens 23 are fixedly connected by lens casing 25；The fiber connector 21 and condenser lens 22 are solid by lens contact pin casing 26
Fixed connection；The lens contact pin casing 26 is fixedly connected with detector assembly 24 by total tubing 27.The configuration of the present invention is simple,
Easily encapsulation, can be realized high directivity.
As shown in figure 5, described enter the light 1 of the input of optical fiber 20 and the light 2 of the input of outlet optical fiber 28 is held to pass through focusing thoroughly
It with the angle of horizontal direction is respectively θ after mirror 221And θ2, the setting of beam splitting lens 23 is in condenser lens 22 and detector assembly
Between 24；One end of beam splitting lens 23 towards the condenser lens 22 is denoted as 23 front end of beam splitting lens, wears into α degree angle, and described point
One end of optical lens 23 towards detector assembly 24 is denoted as 23 rear end of beam splitting lens, and 23 rear end of beam splitting lens is divided into two
Point, a portion wears into beta angle.Preferably, 23 rear end of beam splitting lens is using its center line as boundary, and wherein top half is ground
At beta angle.
As shown in figure 5, described enter the light 1 of the input of optical fiber 20 and the light 2 of the input of outlet optical fiber 28 is held to be transferred to light splitting
It is separated behind 23 rear end of lens through superrefraction and total reflection, light 1 does not wear into the one side of β angle perpendicular to 23 rear end of beam splitting lens
Out, light 2 is worn into angle beta face in 23 rear end of beam splitting lens and is totally reflected, two-beam line be transferred to detector assembly 24 it
The preceding lens 23 that have been split separate, and the light 1 for entering to hold optical fiber 20 to transmit is detected apparatus assembly 24 and receives, outlet optical fiber 28
The seldom detected device assembly 24 of the light 2 of transmission receives, to realize high directivity；The α and beta angle of the beam splitting lens 23
So that the position that light 1 does not wear into beta angle perpendicular to 23 rear end of beam splitting lens comes out, light 2 is ground in 23 rear end of beam splitting lens
It is totally reflected at the position of beta angle.
Fig. 6 is the α degree angle index path for calculating beam splitting lens 23.It can be with according to the law of refraction, reflection law and Fig. 6 index path
Calculate the angle α and θ1Relationship:
θ1=α-arccos [n1cosα/n0]
Wherein: n0It is medium refraction index between condenser lens 22 and beam splitting lens 23, n1It is 23 refractive index of beam splitting lens.
Fig. 7 is the beta angle index path for calculating beam splitting lens 23.It can be with according to the law of refraction, reflection law and Fig. 7 index path
Calculate the angle β and θ2Relationship:
θ2=arccos [n1/no*cos(α+β-arcsin(no/n1))]-α
Wherein: n0It is medium refraction index between condenser lens 22 and beam splitting lens 23, n1It is 23 refractive index of beam splitting lens.
As it can be seen that described enter the light 1 of the input of optical fiber 20 and the light 2 of the input of outlet optical fiber 28 is held to be transferred to detector assembly
The lens 23 that have been split before 24 separate, and the light 1 for entering to hold optical fiber 20 to transmit is detected apparatus assembly 24 and receives, outlet light
The seldom detected device assembly 24 of the light 2 of 28 transmission of fibre receives, to realize high directivity.The light splitting that the present invention passes through angle lap
Lens 23 are divided, and have structure simple, and at low cost and directionality high feature, directionality can accomplish 30dB or more.
The condenser lens 22 is G lens, and planar ends are coated with spectro-film.
23 front end of beam splitting lens is coated with anti-reflection film.
It is described enter to hold optical fiber 20, outlet optical fiber 28 be single mode optical fiber.
As shown in figure 3, the optic fibre hole pitch of holes of the fiber connector 21 is between 125um to 250um.
The lens casing 25,26 material of lens contact pin casing can be with any one in glass, metal or ceramics.
27 material of total tubing is metal.
In conclusion a kind of unidirectional TAP PD provided by the invention, enters to hold optical fiber 20 and outlet optical fiber 28 defeated simultaneously
Enter light, two-way light is collimated into collimated ray 1 and light 2 that two beams have small angle by condenser lens 22, and light 1 and light 2 pass through
Refraction and total reflection occurs after crossing beam splitting lens 23, the position that light 1 does not wear into β angle perpendicular to beam splitting lens 23 comes out,
Light 2 is totally reflected in the position that beam splitting lens 23 wears into beta angle, and two-beam line is separated, the light for entering to hold optical fiber 20 to transmit
Detected apparatus assembly 24 receives, and the seldom detected device assembly 24 of the light that outlet optical fiber 28 transmits receives, to realize height
Unidirectional.
Although the present invention detailed example and has described relevant specific embodiment and has made reference, to the technology of this field
For personnel, after reading and understanding the description and the appended drawings, especially above-mentioned without departing substantially from thought and range of the invention
Device is implemented functionally, to be variously modified on device form and details.These changes fall within of the invention
Protection scope required by claim.
Claims (10)
1. a kind of unidirectional TAP PD, which is characterized in that including entering to hold optical fiber (20), fiber connector (21), beam splitting lens
(23), detector assembly (24) and outlet optical fiber (28),
It is described to enter one end of optical fiber (20) and one end of outlet optical fiber (28) is held to be separately positioned in (21) two hole of fiber connector,
The beam splitting lens (23) is arranged between fiber connector (21) and detector assembly (24)；Beam splitting lens (23) direction
One end of fiber connector (21) is denoted as beam splitting lens (23) front end, wears into α degree angle, and the beam splitting lens (23) is towards detector
One end of component (24) is denoted as beam splitting lens (23) rear end, and beam splitting lens (23) rear end is divided into two parts, a portion
Wear into beta angle；The α and beta angle of beam splitting lens (23) setting are so as to enter to hold the light of optical fiber (20) input perpendicular to light splitting
The position that beta angle is not worn into lens (23) rear end comes out, the light of outlet optical fiber (28) input is in beam splitting lens (23) rear end
The position for wearing into beta angle is totally reflected.
2. a kind of unidirectional TAP PD according to claim 1, which is characterized in that further include condenser lens (22), saturating
Mirror sleeve pipe (25), lens contact pin casing (26), total tubing (27),
The condenser lens (22) is arranged between fiber connector (21) and beam splitting lens (23), the condenser lens (22) and
Beam splitting lens (23) is fixedly connected by lens casing (25)；The fiber connector (21) and condenser lens (22) pass through lens
Contact pin casing (26) is fixedly connected；The lens contact pin casing (26) and detector assembly (24) are fixed by total tubing (27)
Connection.
3. a kind of unidirectional TAP PD according to claim 2, which is characterized in that the condenser lens (22) is G saturating
Mirror, planar ends are coated with spectro-film.
4. a kind of unidirectional TAP PD according to claim 1, which is characterized in that beam splitting lens (23) the front end plating
There is anti-reflection film.
5. a kind of unidirectional TAP PD according to claim 1, which is characterized in that beam splitting lens (23) rear end with
Its center line is boundary, and wherein top half wears into beta angle.
6. a kind of unidirectional TAP PD according to claim 1, which is characterized in that described to enter to hold optical fiber (20), outlet
Optical fiber (28) is single mode optical fiber.
7. a kind of unidirectional TAP PD according to claim 1, which is characterized in that the light of the fiber connector (21)
Fine hole pitch of holes is between 125um to 250um.
8. a kind of unidirectional TAP PD according to claim 2, which is characterized in that the lens casing (25), lens
Contact pin casing (26) material can be any one in glass, metal or ceramics；
Total tubing (27) material is metal.
9. a kind of unidirectional TAP PD according to claim 2, which is characterized in that described to enter optical fiber (20) is held to input
Light is respectively afterwards θ with the angle of horizontal direction by condenser lens (22)1, then the angle α and θ1Relationship are as follows:
θ1=α-arccos [n1cosα/n0]
Wherein, n0It is medium refraction index between condenser lens (22) and beam splitting lens (23), n1It is beam splitting lens (23) refractive index.
10. a kind of unidirectional TAP PD according to claim 9, which is characterized in that outlet optical fiber (28) input
Light by condenser lens (22) be afterwards θ with the angle of horizontal direction2, then the angle β and θ2Relationship are as follows:
θ2=arccos [n1/no*cos(α+β-arcsin(no/n1))]-α
Wherein, n0It is medium refraction index between condenser lens (22) and beam splitting lens (23), n1It is beam splitting lens (23) refractive index.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710738036.3A CN107390329B (en) | 2017-08-24 | 2017-08-24 | A kind of unidirectional TAP PD |
| PCT/CN2017/118252 WO2019037362A1 (en) | 2017-08-24 | 2017-12-25 | Unidirectional tap pd |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710738036.3A CN107390329B (en) | 2017-08-24 | 2017-08-24 | A kind of unidirectional TAP PD |
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| Publication Number | Publication Date |
|---|---|
| CN107390329A CN107390329A (en) | 2017-11-24 |
| CN107390329B true CN107390329B (en) | 2019-01-04 |
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| CN201710738036.3A Active CN107390329B (en) | 2017-08-24 | 2017-08-24 | A kind of unidirectional TAP PD |
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| WO (1) | WO2019037362A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107390329B (en) * | 2017-08-24 | 2019-01-04 | 武汉光迅科技股份有限公司 | A kind of unidirectional TAP PD |
| CN108957774A (en) * | 2018-06-29 | 2018-12-07 | 昂纳信息技术（深圳）有限公司 | A kind of Optical devices |
| CN108761671A (en) * | 2018-06-29 | 2018-11-06 | 昂纳信息技术（深圳）有限公司 | A kind of compact Tap PD |
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| JPH1062611A (en) * | 1996-08-23 | 1998-03-06 | Hitachi Ltd | Beam splitter and optical disc device using it |
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| EP1816499A1 (en) * | 2006-02-06 | 2007-08-08 | Hitachi Metals, Ltd. | Unidirectional optical power monitor |
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| CN204790086U (en) * | 2015-06-30 | 2015-11-18 | 昂纳信息技术（深圳）有限公司 | Directionality light detector |
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| US20040156596A1 (en) * | 2002-09-06 | 2004-08-12 | Adc Telecommunications, Inc. | Fiber optic tap with compensated spectral filter |
| US7255497B2 (en) * | 2004-06-15 | 2007-08-14 | Hitachi Metals, Ltd. | Unidirectional optical power monitor |
| CN104092493A (en) * | 2014-07-30 | 2014-10-08 | 四川飞阳科技有限公司 | One-way luminous power monitor |
| CN107390329B (en) * | 2017-08-24 | 2019-01-04 | 武汉光迅科技股份有限公司 | A kind of unidirectional TAP PD |
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2017
- 2017-08-24 CN CN201710738036.3A patent/CN107390329B/en active Active
- 2017-12-25 WO PCT/CN2017/118252 patent/WO2019037362A1/en active Application Filing
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|---|---|---|---|---|
| JPH1062611A (en) * | 1996-08-23 | 1998-03-06 | Hitachi Ltd | Beam splitter and optical disc device using it |
| WO2006080143A1 (en) * | 2005-01-31 | 2006-08-03 | Hitachi Metals, Ltd. | Optical power monitor and its manufacturing method |
| EP1816499A1 (en) * | 2006-02-06 | 2007-08-08 | Hitachi Metals, Ltd. | Unidirectional optical power monitor |
| CN201100946Y (en) * | 2007-11-13 | 2008-08-13 | 深圳新飞通光电子技术有限公司 | Optical power photoelectric detector |
| CN102096195A (en) * | 2010-12-06 | 2011-06-15 | 西安华科光电有限公司 | Three-dimensionally spectroscopic combined pentaprism |
| CN203069266U (en) * | 2012-12-17 | 2013-07-17 | 厦门三优光电股份有限公司 | Light splitting detector |
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| CN204790086U (en) * | 2015-06-30 | 2015-11-18 | 昂纳信息技术（深圳）有限公司 | Directionality light detector |
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| Publication number | Publication date |
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| CN107390329A (en) | 2017-11-24 |
| WO2019037362A1 (en) | 2019-02-28 |
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