CN105353470A - Polarization converter based on trapezoidal waveguide structure - Google Patents

Polarization converter based on trapezoidal waveguide structure Download PDF

Info

Publication number
CN105353470A
CN105353470A CN201510906817.XA CN201510906817A CN105353470A CN 105353470 A CN105353470 A CN 105353470A CN 201510906817 A CN201510906817 A CN 201510906817A CN 105353470 A CN105353470 A CN 105353470A
Authority
CN
China
Prior art keywords
waveguide
article
ridge
mould
slab
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201510906817.XA
Other languages
Chinese (zh)
Other versions
CN105353470B (en
Inventor
陈代高
肖希
王磊
邱英
李淼峰
刘磊
杨奇
余少华
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wuhan Research Institute of Posts and Telecommunications Co Ltd
Original Assignee
Wuhan Research Institute of Posts and Telecommunications Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wuhan Research Institute of Posts and Telecommunications Co Ltd filed Critical Wuhan Research Institute of Posts and Telecommunications Co Ltd
Priority to CN201510906817.XA priority Critical patent/CN105353470B/en
Publication of CN105353470A publication Critical patent/CN105353470A/en
Application granted granted Critical
Publication of CN105353470B publication Critical patent/CN105353470B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • G02B6/27—Optical coupling means with polarisation selective and adjusting means
    • G02B6/2726—Optical coupling means with polarisation selective and adjusting means in or on light guides, e.g. polarisation means assembled in a light guide
    • 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
    • G02B6/27—Optical coupling means with polarisation selective and adjusting means
    • G02B6/2753—Optical coupling means with polarisation selective and adjusting means characterised by their function or use, i.e. of the complete device
    • 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
    • G02B6/27—Optical coupling means with polarisation selective and adjusting means
    • G02B6/2753—Optical coupling means with polarisation selective and adjusting means characterised by their function or use, i.e. of the complete device
    • G02B6/2766—Manipulating the plane of polarisation from one input polarisation to another output polarisation, e.g. polarisation rotators, linear to circular polarisation converters

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Integrated Circuits (AREA)

Abstract

The invention discloses a polarization converter based on a trapezoidal waveguide structure. The polarization converter includes ridge waveguides which are in double-layer trapezoid arrangement, slab waveguides and strip waveguides in asymmetrical trapezoid arrangement, the ridge waveguides are arranged on upper end faces of the slab waveguides and are aligned with two ends of the slab waveguides, the ridge waveguides and the right ends of the slab waveguides are connected with the strip waveguides, a TM0 mode is incident from the ridge waveguides and the left ends of the slab waveguides and is converted into a TE1 mode through the ridge waveguides and the slab waveguides, and the TE1 mode is input to the strip waveguides, and is converted into the TE0 mode to be output after passing through the strip waveguides; and conversely, the TE0 mode is incident from the right ends of the strip waveguides, and is converted into the TE1 mode after passing through the strip waveguides, and the TE1 mode is input to the ridge waveguides and the slab waveguides, and is converted into the TM0 mode to be output. The polarization converter based on the trapezoidal waveguide structure realizes high-efficiency conversion between TM0 and TE0 polarization states, the process is low complexity and large in tolerance, and the rate of finished products is high.

Description

Based on the polarization converter of trapezoidal waveguide structure
Technical field
The present invention relates to polarization converter, be specifically related to the polarization converter based on trapezoidal waveguide structure.
Background technology
Polarization converter is an important devices of palarization multiplexing in optical communication, and the polarization converter used at present can be summarized as two kinds, and the first adopts cross section to be the waveguide of L-type or analogous shape, realizes TM 0mould and TE 0the direct conversion of mould, the second adopts inverted T shape waveguide, realizes TM 0mould and TE 1conversion between mould, recycling asymmetric mach-zehnder interferometer (MZI) or directional coupler are by TE 1mode convertion is TE 0mould.Current Problems existing is:
1, make L-type waveguide and have very high requirement to aligning machining precision, therefore this device tolerance is less, can not ensure yield rate;
2, connect asymmetric MZI for after inverted T shape waveguide, because device number is more, unavoidable giving designs increase difficulty, and many devices connection simultaneously can be introduced extra Insertion Loss and bandwidth is reduced; Connect directional coupler for after inverted T shape waveguide, because directional coupler is more responsive to the band gap between two waveguides, so also have higher requirements to machining precision, yield rate is lower.
Summary of the invention
Technical matters to be solved by this invention is that existing polarization converter exists the problem high to requirement on machining accuracy, design difficulty is large and yield rate is low.
In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is to provide a kind of polarization converter based on trapezoidal waveguide structure, comprise the ridge waveguide in double-deck echelon formation, slab waveguide and the Luciola substriata in asymmetric trapezoidal setting, described ridge waveguide be arranged on described slab waveguide upper end and with the justify align of described slab waveguide, described ridge waveguide is connected described Luciola substriata with the right-hand member of described slab waveguide
TM 0the entrance port that mould is formed from the left end of described ridge waveguide and described slab waveguide is incident, is converted into TE through described ridge waveguide and described slab waveguide 1mould, described TE 1the exit portal that mould is formed from the right-hand member of described ridge waveguide and described slab waveguide penetrates and is input to described Luciola substriata, described TE 1mould is by being converted into TE after described Luciola substriata 0mould exports;
Otherwise, described TE 0the entrance port that mould is formed from the right-hand member of described Luciola substriata is injected, after described Luciola substriata, be converted into TE 1mould, described TE 1mould penetrates from the exit portal that the left end of described Luciola substriata is formed and is input to described ridge waveguide and described slab waveguide, described TE 1mould is by changing into TM after described ridge waveguide and slab waveguide 0mould exports.
In such scheme, be provided with transition section waveguide between the exit portal of the right-hand member formation of described ridge waveguide and described slab waveguide and described Luciola substriata, described slab waveguide comprises from left end to right-hand member the width dimensions step sector increased gradually and the bonding pad being connected described step sector and described excessive section waveguide.
In such scheme, described bonding pad is square or trapezoidal.
In such scheme, described ridge waveguide comprises the first ridge waveguide and the second ridge waveguide, the right-hand member of described first ridge waveguide mates with the left end of described second ridge waveguide and is connected, the left end of described first ridge waveguide connects with the left end of described step sector and width is equal, and the right-hand member of described second ridge waveguide connects with the right-hand member of described squared region and width is equal.
In such scheme, the right-hand member width dimensions of described second ridge waveguide is greater than the width dimensions of its left end.
In such scheme, described Luciola substriata comprise connect successively Article 1 waveguide, Article 2 waveguide, Article 3 waveguide, Article 4 waveguide, Article 5 waveguide and Article 6 waveguide, the whole width size of described Article 1 waveguide, Article 2 waveguide and described Article 3 waveguide increases gradually, and the whole width size of described Article 4 waveguide, Article 5 waveguide and described Article 6 waveguide reduces gradually.
In such scheme, the height of described slab waveguide is H1, and the height of described ridge waveguide is H2, and the height of described Luciola substriata is H, wherein H=H 1+ H 2.
The present invention, adopts the ridge waveguide in double-deck trapezoidal setting and slab waveguide to realize TM 0with TE 1high-level efficiency conversion between pattern, then adopt the Luciola substriata in asymmetric trapezoidal setting to realize TE 1with TE 0high-level efficiency conversion between pattern, finally realizes TM 0with TE 0high-level efficiency conversion between polarization state, the low tolerance of process complexity is large, and yield rate is high.
Accompanying drawing explanation
Fig. 1 is vertical view of the present invention;
Fig. 2 is front view of the present invention.
Embodiment
Below in conjunction with Figure of description, the present invention is described in detail.
As shown in Figure 1, the invention provides a kind of polarization converter based on trapezoidal waveguide structure, comprise the ridge waveguide in double-deck echelon formation, slab waveguide 3 and in the Luciola substriata of asymmetric trapezoidal setting, ridge waveguide be arranged on slab waveguide 3 upper end and with the justify align of slab waveguide 3, TM 0the entrance port that mould is formed from the left end of ridge waveguide and slab waveguide 3 is incident, through ridge waveguide and slab waveguide 3, in the waveguide somewhere TM 0mould and TE 1mould has identical refractive index, thus realizes phase matching, TM 0mould is converted into TE 1mould, TE 1mould from the exit portal injection that the right-hand member of ridge waveguide and slab waveguide 3 is formed, enters Luciola substriata again.
Transition section waveguide 4, TE is provided with between exit portal and Luciola substriata 1mould realizes stable process in transition section waveguide 4, slab waveguide 3 comprises from left end to right-hand member the width dimensions step sector 31 increased gradually and the bonding pad 32 being connected step sector 31 and excessive section waveguide 4, bonding pad 32 can be different shape, preferably square or trapezoidal.
The right-hand member that ridge waveguide comprises the first ridge waveguide 1 and the second ridge waveguide 2, first ridge waveguide 1 mates with the left end of the second ridge waveguide 2 and is connected, and in both junctions, width is equal.The intersection of the first ridge waveguide 1 and the second ridge waveguide 2 can overlap with the intersection of step sector 31 and bonding pad 32, also can not overlap, the left end of the first ridge waveguide 1 connects with the left end of step sector 31 and width is equal, and the right-hand member of the second ridge waveguide 2 connects with the right-hand member of bonding pad 32 and width is equal.Preferably, the left end width dimensions of the first ridge waveguide 1 can be identical or different from the width dimensions of right-hand member, in the present invention, preferably, the right-hand member width dimensions of the second ridge waveguide 2 is greater than the width dimensions of its left end, and therefore, the second ridge waveguide 2 is also the wide trapezium structure of the narrow right-hand member of left end.
Composition graphs 1 and Fig. 2, TE 1mould realizes stable process in transition section waveguide 4, after stable process, enter Luciola substriata.Luciola substriata comprise connect successively Article 1 waveguide 5, Article 2 waveguide 6, Article 3 waveguide 7, Article 4 waveguide 8, Article 5 waveguide 9 and Article 6 waveguide 10.Article 1, the left end of waveguide 5 is connected with the right-hand member of transition section waveguide 4, and junction width is equal; The left end of Article 2 waveguide 6 is connected with the right-hand member of Article 1 waveguide 5, and junction width is equal; The left end of Article 3 waveguide 7 is connected with the right-hand member of Article 2 waveguide 6, and junction width is equal; The left end of Article 4 waveguide 8 is connected with the right-hand member of Article 3 waveguide 7, and junction width is equal; The left end of Article 5 waveguide 9 is connected with the right-hand member of Article 4 waveguide 8, and junction width is equal; The left end of Article 6 waveguide 10 is connected with the right-hand member of Article 5 waveguide 9, and junction width is equal.The whole width size of Article 1 waveguide 5, Article 2 waveguide 6 and Article 3 waveguide 7 increases gradually, and the whole width size of Article 4 waveguide 8, Article 5 waveguide 9 and Article 6 waveguide 10 reduces gradually.
The present invention, the height of slab waveguide 3 is H 1, the height of ridge waveguide is H 2, the height of Luciola substriata is H, wherein H=H 1+ H 2, therefore, from the side the upper surface of ridge waveguide and the upper surface of Luciola substriata parallel.
TE after the exit portal injection that the right-hand member of the second ridge waveguide 2 and bonding pad 32 is formed 1in mould input transition section waveguide 4, after stable, incide Luciola substriata, successively after Article 1 waveguide 5, Article 2 waveguide 6, Article 3 waveguide 7, Article 4 waveguide 8, Article 5 waveguide 9 and Article 6 waveguide 10, TE 1mould throughout wavefront experiences different distance, and it is consistent that final wavefront reaches phase place at exit portal, TE 1mould is converted into TE 0mould, and export from the right-hand member of Article 6 waveguide 10, complete TM 0with TE 0high-level efficiency conversion between polarization state.
Otherwise, if TE 0the entrance port that mould is formed from the right-hand member of Luciola substriata is injected, successively after Article 6 waveguide 10, Article 5 waveguide 9, Article 4 waveguide 8, Article 3 waveguide 7, Article 2 waveguide 6 and Article 1 waveguide 5, and TE 0mould throughout wavefront experiences different distance, finally reaches TE at exit portal 1the PHASE DISTRIBUTION of mould mould field, TE 0mould is converted into TE 1mould, and export from the left end of Article 1 waveguide 5, TE 1mould enters in transition section waveguide 4, incides in ridge waveguide and slab waveguide 3, somewhere TE in the waveguide after stable 1mould and TM 0mould has identical refractive index, thus realizes phase matching, TE 1mould is by changing into TM after ridge waveguide and slab waveguide 3 0mould exports.
The present invention, adopts the ridge waveguide in double-deck trapezoidal setting and slab waveguide to realize TM 0with TE 1high-level efficiency conversion between pattern, then adopt the Luciola substriata in asymmetric trapezoidal setting to realize TE 1with TE 0high-level efficiency conversion between pattern, finally realizes TM 0with TE 0high-level efficiency conversion between polarization state, the low tolerance of process complexity is large, and yield rate is high.
The present invention is not limited to above-mentioned preferred forms, and anyone should learn the structure change made under enlightenment of the present invention, and every have identical or close technical scheme with the present invention, all falls within protection scope of the present invention.

Claims (7)

1. based on the polarization converter of trapezoidal waveguide structure, it is characterized in that, comprise the ridge waveguide in double-deck echelon formation, slab waveguide and the Luciola substriata in asymmetric trapezoidal setting, described ridge waveguide be arranged on described slab waveguide upper end and with the justify align of described slab waveguide, described ridge waveguide is connected described Luciola substriata with the right-hand member of described slab waveguide
TM 0the entrance port that mould is formed from the left end of described ridge waveguide and described slab waveguide is incident, is converted into TE through described ridge waveguide and described slab waveguide 1mould, described TE 1the exit portal that mould is formed from the right-hand member of described ridge waveguide and described slab waveguide penetrates and is input to described Luciola substriata, described TE 1mould is by being converted into TE after described Luciola substriata 0mould exports;
Otherwise, described TE 0the entrance port that mould is formed from the right-hand member of described Luciola substriata is injected, after described Luciola substriata, be converted into TE 1mould, described TE 1mould penetrates from the exit portal that the left end of described Luciola substriata is formed and is input to described ridge waveguide and described slab waveguide, described TE 1mould is by changing into TM after described ridge waveguide and slab waveguide 0mould exports.
2. as claimed in claim 1 based on the polarization converter of trapezoidal waveguide structure, it is characterized in that, be provided with transition section waveguide between the exit portal of the right-hand member formation of described ridge waveguide and described slab waveguide and described Luciola substriata, described slab waveguide comprises from left end to right-hand member the width dimensions step sector increased gradually and the bonding pad being connected described step sector and described transition section waveguide.
3., as claimed in claim 2 based on the polarization converter of trapezoidal waveguide structure, it is characterized in that, described bonding pad is square or trapezoidal.
4. as claimed in claim 2 based on the polarization converter of trapezoidal waveguide structure, it is characterized in that, described ridge waveguide comprises the first ridge waveguide and the second ridge waveguide, the right-hand member of described first ridge waveguide mates with the left end of described second ridge waveguide and is connected, the left end of described first ridge waveguide connects with the left end of described step sector and width is equal, and the right-hand member of described second ridge waveguide connects with the right-hand member of described squared region and width is equal.
5., as claimed in claim 4 based on the polarization converter of trapezoidal waveguide structure, it is characterized in that, the right-hand member width dimensions of described second ridge waveguide is greater than the width dimensions of its left end.
6. as claimed in claim 1 based on the polarization converter of trapezoidal waveguide structure, it is characterized in that, described Luciola substriata comprise connect successively Article 1 waveguide, Article 2 waveguide, Article 3 waveguide, Article 4 waveguide, Article 5 waveguide and Article 6 waveguide, the whole width size of described Article 1 waveguide, Article 2 waveguide and described Article 3 waveguide increases gradually, and the whole width size of described Article 4 waveguide, Article 5 waveguide and described Article 6 waveguide reduces gradually.
7., as claimed in claim 1 based on the polarization converter of trapezoidal waveguide structure, it is characterized in that, the height of described slab waveguide is H1, and the height of described ridge waveguide is H2, and the height of described Luciola substriata is H, wherein H=H 1+ H 2.
CN201510906817.XA 2015-12-09 2015-12-09 polarization converter based on trapezoidal waveguide structure Active CN105353470B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510906817.XA CN105353470B (en) 2015-12-09 2015-12-09 polarization converter based on trapezoidal waveguide structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510906817.XA CN105353470B (en) 2015-12-09 2015-12-09 polarization converter based on trapezoidal waveguide structure

Publications (2)

Publication Number Publication Date
CN105353470A true CN105353470A (en) 2016-02-24
CN105353470B CN105353470B (en) 2018-02-16

Family

ID=55329469

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201510906817.XA Active CN105353470B (en) 2015-12-09 2015-12-09 polarization converter based on trapezoidal waveguide structure

Country Status (1)

Country Link
CN (1) CN105353470B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115657204A (en) * 2022-12-05 2023-01-31 宏芯科技(泉州)有限公司 Polarization filter
WO2023025065A1 (en) * 2021-08-25 2023-03-02 中兴光电子技术有限公司 Polarization rotation beam splitter and photonic integrated chip

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101320113A (en) * 2008-07-15 2008-12-10 浙江大学 Waveguide type polarization mode converter
US20140133796A1 (en) * 2012-11-14 2014-05-15 Po Dong Apparatus For Providing Polarization Rotation
JP2015169766A (en) * 2014-03-06 2015-09-28 日本電信電話株式会社 polarization rotation circuit
US20150338577A1 (en) * 2014-05-22 2015-11-26 Sifotonics Technologies Co., Ltd. Polarization Rotator-Splitter/Combiner Based On Silicon Rib-Type Waveguides

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101320113A (en) * 2008-07-15 2008-12-10 浙江大学 Waveguide type polarization mode converter
US20140133796A1 (en) * 2012-11-14 2014-05-15 Po Dong Apparatus For Providing Polarization Rotation
JP2015169766A (en) * 2014-03-06 2015-09-28 日本電信電話株式会社 polarization rotation circuit
US20150338577A1 (en) * 2014-05-22 2015-11-26 Sifotonics Technologies Co., Ltd. Polarization Rotator-Splitter/Combiner Based On Silicon Rib-Type Waveguides

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
HATEM EL-REFAEI、DAVID YEVICK: "《An Optimized InGaAsP/InP Polarization Converter Employing Asymmetric Rib Waveguides》", 《JOURNAL OF LIGHTWAVE TECHNOLOGY》 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023025065A1 (en) * 2021-08-25 2023-03-02 中兴光电子技术有限公司 Polarization rotation beam splitter and photonic integrated chip
CN115657204A (en) * 2022-12-05 2023-01-31 宏芯科技(泉州)有限公司 Polarization filter
CN115657204B (en) * 2022-12-05 2024-02-09 宏芯科技(泉州)有限公司 Polarization filter

Also Published As

Publication number Publication date
CN105353470B (en) 2018-02-16

Similar Documents

Publication Publication Date Title
CN103345022B (en) Asymmetric planar optical waveguide mode multiplexing/demultiplexing device based on few-mode fibers
CN103339541B (en) Waveguide-type polarization beam splitter
CN105093408A (en) Silicon-based nanowire polarization beam splitter based on mode evolution principle
CN204536588U (en) Polarization beam splitting spinner
CN101571657B (en) Photonic crystal all-optical switch
CN106249355A (en) The mode multiplexing demultiplexer mated based on silica-based optical waveguide mode
CN103339540B (en) Waveguide-type polarization beam splitter
CN103023600A (en) Multi-channel integrating light guide mode multiplexing-demultiplexing device
CN105445953A (en) Polarization converter based on taking high-order TE mode as transition mode
CN108983352A (en) A kind of end coupling device and preparation method thereof
CN108603985A (en) A kind of photo-coupler and light processing method
CN107092056A (en) A kind of Wavelength division multiplexer/demultiplexer and preparation method thereof
CN103984063A (en) Method for coupling and aligning optical fiber and integrated chip and coupling and aligning module thereof
CN205941972U (en) Polarization beam splitter
CN105353470A (en) Polarization converter based on trapezoidal waveguide structure
CN104834059B (en) Mode conversion method and device in a kind of optical transmission process
CN103424805A (en) Y-bifurcation-structured 1 * 2 optical power splitter
CN106338800B (en) It is a kind of to be used for optical fiber and the horizontal coupler of chip chamber optical signal transmission
CN113311537A (en) Polymer three-mode multiplexer based on cascade conical coupler
CN103576238A (en) N-mode multiplexer/demultiplexer based on asymmetric Y-furcate structure
CN104393926A (en) Transmitter module for mode multiplexing-wavelength division multiplexing
CN203025377U (en) 1*2 optical power splitter with Y forked structure
CN110187439A (en) A kind of polarization-independent beam splitting device
CN201716434U (en) Integrated unit based on resonant cavity array
CN103217820B (en) A kind of optical branching device of power adjustable

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant
CP01 Change in the name or title of a patent holder

Address after: 430074, No. 88, postal academy road, Hongshan District, Hubei, Wuhan

Patentee after: Wuhan post and Telecommunications Science Research Institute Co., Ltd.

Address before: 430074, No. 88, postal academy road, Hongshan District, Hubei, Wuhan

Patentee before: Wuhan Inst. of Post & Telecom Science

CP01 Change in the name or title of a patent holder