CN111338025A - Mold filtering device and method - Google Patents
Mold filtering device and method Download PDFInfo
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- CN111338025A CN111338025A CN201811556143.5A CN201811556143A CN111338025A CN 111338025 A CN111338025 A CN 111338025A CN 201811556143 A CN201811556143 A CN 201811556143A CN 111338025 A CN111338025 A CN 111338025A
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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
- G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
- G02B6/12—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
- G02B6/122—Basic optical elements, e.g. light-guiding paths
- G02B6/125—Bends, branchings or intersections
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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
- G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
- G02B6/12—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
- G02B6/126—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind using polarisation effects
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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
- G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
- G02B6/12—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
- G02B2006/12083—Constructional arrangements
- G02B2006/12109—Filter
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Abstract
The embodiment of the invention discloses a mode filtering device and a mode filtering method, wherein the mode filtering device comprises a first gradual change waveguide, a bent waveguide and a second gradual change waveguide which are sequentially connected, wherein: the first gradual change waveguide is used for receiving incident light and cutting off polarized light of a specified mode in the incident light so as to filter the polarized light of the specified mode; the curved waveguide is used for radiating the polarized light of the designated mode filtered by the first gradually-changed waveguide outwards; the second tapered waveguide is used for guiding out light passing through the bent waveguide. Compared with the mode filtering scheme of the related technology, the embodiment of the invention has the advantages of small size, good mode filtering effect and simple design, and can greatly improve the performance of a chip and reduce the noise in the chip.
Description
Technical Field
The present application relates to, but is not limited to, the field of silicon-based photonic integrated chips, and more particularly, to a mold filtering apparatus and method.
Background
Generally, devices in the chip are designed for a single mode, but a wider waveguide is adopted to reduce loss, and multiple modes can be supported, for example, three eigenmodes exist in a common 500nm × 200nm strip waveguide, a TE (Transverse-Electric) fundamental mode, a TM (Transverse-Magnetic) fundamental mode and a TE first-order mode exist in the waveguide, in general, the TE fundamental mode is a mode commonly used in the chip, and noise is mainly a high-order mode corresponding to polarization.
The related art mode filtering schemes mainly include ridge waveguide doped absorption, curved waveguide, etc., but their sizes are generally large, and the mode filtering effect is general.
Disclosure of Invention
The embodiment of the invention provides a mold filtering device and a mold filtering method, which are used for reducing noise in a chip.
The embodiment of the invention provides a mode filtering device, which comprises a first gradual change waveguide, a bent waveguide and a second gradual change waveguide which are sequentially connected, wherein:
the first gradual change waveguide is used for receiving incident light and cutting off polarized light of a specified mode in the incident light so as to filter the polarized light of the specified mode;
the curved waveguide is used for radiating the polarized light of the designated mode filtered by the first gradually-changed waveguide outwards;
the second tapered waveguide is used for guiding out light passing through the bent waveguide.
In one embodiment, the width of the first tapered waveguide is narrowed by a width, wherein the width of the end of the first tapered waveguide connected to the curved waveguide is narrower than the width of the end receiving the incident light.
In one embodiment, the width of the end of the first tapered waveguide connected to the curved waveguide is greater than the cutoff width of the reserved mode and less than the cutoff width of the specified mode.
In an embodiment, the width of the second graded waveguide is changed from narrow to wide, wherein the width of the end of the second graded waveguide connected with the curved waveguide is the same as the width of the end of the second graded waveguide connected with the curved waveguide, and the width of the end of the second graded waveguide for guiding light is the same as the width of the end of the first graded waveguide for receiving incident light.
In one embodiment, the curved waveguide comprises one or more segments.
In one embodiment, the first graded waveguide, the curved waveguide and the second graded waveguide are externally provided with cladding layers.
In one embodiment, the mold filtering device further comprises: a light-absorbing body having a light-absorbing layer,
the light absorber is arranged outside the first graded waveguide, the bent waveguide and the second graded waveguide, surrounds the first graded waveguide, the bent waveguide and the second graded waveguide, and is used for absorbing the polarized light of the specified mode radiated by the bent waveguide.
The embodiment of the invention also provides a mold filtering method, which comprises the following steps:
inputting incident light into a first tapered waveguide, and cutting off polarized light of a specified mode in the incident light through the first tapered waveguide so as to filter the polarized light of the specified mode;
radiating the polarized light of the designated mode filtered by the first graded waveguide outwards through a curved waveguide;
and a second tapered waveguide for guiding light out through the curved waveguide.
In one embodiment, the width of the first tapered waveguide is narrowed from wide, and the width of the end of the first tapered waveguide connected with the curved waveguide is larger than the cutoff width of the retention mode and smaller than the cutoff width of the specified mode.
In an embodiment, the polarized light of the specified mode radiated by the curved waveguide is absorbed by a light absorber disposed outside the first graded waveguide, the curved waveguide, and the second graded waveguide.
The mode filtering device comprises a first gradual change waveguide, a bent waveguide and a second gradual change waveguide which are sequentially connected, wherein: the first gradual change waveguide is used for receiving incident light and cutting off polarized light of a specified mode in the incident light so as to filter the polarized light of the specified mode; the curved waveguide is used for radiating the polarized light of the designated mode filtered by the first gradually-changed waveguide outwards; the second tapered waveguide is used for guiding out light passing through the bent waveguide. Compared with the mode filtering scheme of the related technology, the embodiment of the invention has the advantages of small size, good mode filtering effect and simple design, and can greatly improve the performance of a chip and reduce the noise in the chip.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the example serve to explain the principles of the invention and not to limit the invention.
FIG. 1 is a schematic diagram of the components of a filter module device according to an embodiment of the present invention;
FIG. 2 is an effective refractive index of a 1550nm band strip waveguide of different widths;
FIG. 3 is a schematic view showing the constitution of a filtration apparatus according to example 1 of application of the present invention;
FIG. 4 is a diagram showing simulation results of application example 1 of the present invention, in which a is the field distribution of the 1550nm TE0 mode, b is the field distribution of the 1550nm TE1 mode, and c is the insertion loss of the 1550nm band TE0 and TE 1;
FIG. 5 is a schematic view showing the constitution of a filter module unit according to example 2 of the present invention;
FIG. 6 shows the simulation results of the application example 2 of the present invention, in which a is the field distribution of the 1550nm TE0 mode, b is the field distribution of the 1550nm TE1 mode, and c is the insertion loss of the 1550nm band TE0 and TE 1;
FIG. 7 is a schematic view showing the constitution of a filter module unit according to example 2 of the present invention;
FIG. 8 is a flow chart of a method of filtering a mold according to an embodiment of the invention.
Detailed Description
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.
The steps illustrated in the flow charts of the figures may be performed in a computer system such as a set of computer-executable instructions. Also, while a logical order is shown in the flow diagrams, in some cases, the steps shown or described may be performed in an order different than here.
As shown in fig. 1, the mold filtering apparatus according to the embodiment of the present invention includes: a first tapered waveguide 11, a curved waveguide 12 and a second tapered waveguide 13 connected in sequence, wherein:
the first tapered waveguide 11 is configured to receive incident light, and cut off polarized light of a specified mode in the incident light, so as to filter the polarized light of the specified mode;
the curved waveguide 12 is used for radiating the polarized light of the specified mode filtered by the first graded waveguide 11 to the outside;
the second tapered waveguide 13 is used to guide out the light passing through the curved waveguide 12.
Compared with the mode filtering scheme of the related technology, the embodiment of the invention has the advantages of small size, good mode filtering effect and simple design, and can greatly improve the performance of a chip and reduce the noise in the chip.
Wherein the width of the first tapered waveguide 11 is narrowed by a width, and wherein the width of the end of the first tapered waveguide 11 connected to the curved waveguide 12 is narrower than the width of the end receiving the incident light.
The width of the second tapered waveguide 13 is changed from narrow to wide, wherein the width of the end of the second tapered waveguide 13 connected to the curved waveguide 12 is the same as the width of the end of the second tapered waveguide 13 connected to the curved waveguide 12, and the width of the end of the second tapered waveguide 13 for guiding light is the same as the width of the end of the first tapered waveguide 11 for receiving incident light.
In the embodiment of the invention, incident light firstly enters a first gradual change waveguide 11 with the width being changed from wide to narrow, so that the transition from a common waveguide to a high-order mode cut-off waveguide is realized; then into the curved waveguide 12 to rapidly 'strip' the cut-off modes off the waveguide; and finally exits through the second graded waveguide 13 with restored width.
The implementation principle of the embodiment of the invention is as follows:
when the waveguide structure is changed, some modes can no longer exist, and the embodiment of the invention realizes the cut-off of some modes by changing the waveguide width. FIG. 2 shows the effective refractive index n of different order TE polarization modes of waveguides with different widths and 220nm heightseff. As can be seen from fig. 2, the narrower the waveguide width, the fewer modes are supported; the higher the mode order, the wider the corresponding waveguide cutoff width (the waveguide cutoff width is the minimum waveguide width that supports propagation of the corresponding mode).
The width of the end of the first tapered waveguide 11 connected to the curved waveguide 12 can be set according to the requirement of the filtering mode, and is greater than the cut-off width of the retention mode and less than the cut-off width of the designated mode (the mode to be filtered). For example, the fundamental mode TE0 is retained and is set to 450nm or less. The first order TE mode is retained and can be set to 450 nm-800 nm.
In one embodiment, the first graded waveguide 11, the curved waveguide 12 and the second graded waveguide 13 are externally provided with cladding layers.
The width of the first tapered waveguide 11 is tapered from W1 to W2, in the process, high-order modes gradually leak from the center of the waveguide into the cladding, but are still limited to the vicinity of the waveguide. And the adoption of the bent waveguide 12 can enhance the outward radiation of the optical field and improve the mode filtering efficiency.
The curved waveguide 12 may comprise one or more sections in order to achieve a better radiation effect.
In an embodiment, the mold filtering device may further include: and the light absorber is arranged outside the first graded waveguide 11, the bent waveguide 12 and the second graded waveguide 13, surrounds the first graded waveguide 11, the bent waveguide 12 and the second graded waveguide 13, and is used for absorbing the polarized light of the specified mode radiated by the bent waveguide 12.
The light absorber can be made of metal, heavily doped silicon or germanium.
The following description is given by way of some application examples
Application example 1
As shown in fig. 3, the mode filtering apparatus includes a first tapered waveguide 11 with a width varying from W1 to W2, a curved waveguide 12, and a second tapered waveguide 13 with a width varying from W2 to W1, wherein the first tapered waveguide 11 is connected to the input port 10, and the curved waveguide 12 includes four segments of waveguides with a radius of curvature R: 33. 34, 35 and 36, and the second tapered waveguide 13 is connected to the output port 20.
The working mode is as follows: since the waveguide with the width of W2 cuts off the TE polarization high-order mode entering the mode filtering device from the input port 10, the TE polarization high-order mode will leak into the surrounding cladding layer in a large amount when passing through the curved waveguides 33, 34, 35 and 36, while the fundamental mode TE0 can pass through with extremely low insertion loss, so that the elimination of the high-order mode is completed.
In the application example, the waveguide material of the whole mode filtering device is silicon, the cladding layer is silicon oxide, the height of the waveguide is 220nm, the W1 is 500nm, the W2 is 400nm, the lengths L of the first gradual change waveguide 11 and the second gradual change waveguide 13 are both 10 μm, the curvature radius R of the four sections of bent waveguides 33-36 is 20 μm, the corresponding bending angles theta are both 30 degrees, and the length of the whole mode filtering device is about 60 μm.
In FIG. 4, a is the field distribution of 1550nm TE0 mode, b is the field distribution of 1550nm TE1 mode, and c is the insertion loss of 1550nm bands TE0 and TE 1. The insertion loss and extinction ratio of TE0 and TE1 can be adjusted by adjusting W2, L, theta, R and other parameters.
Application example 2
As shown in fig. 5, the mode filtering apparatus includes a first tapered waveguide 11 with a width varying from W1 to W2, a curved waveguide 12, and a second tapered waveguide 13 with a width varying from W2 to W1, wherein the first tapered waveguide 11 is connected to the input port 10, and the curved waveguide 12 includes two segments of waveguides with a curvature radius R and a bending angle θ: 53 and 54 and the second tapered waveguide 13 is connected to the output port 20.
The working mode is as follows: since the waveguide with the width of W2 cuts off the TE polarization higher-order modes entering the mode filtering device from the input port 10, they will leak into the surrounding cladding layer in a large amount when passing through the curved waveguides 53 and 54, while the fundamental mode TE0 can pass through with extremely low insertion loss, thus completing the elimination of the higher-order modes.
In the application example, the waveguide material of the whole mode filtering device is silicon, the cladding layer is silicon oxide, the height of the waveguide is 220nm, the W1 is 500nm, the W2 is 450nm, the length L of the first graded waveguide 11 and the length L of the second graded waveguide 13 are both 10 μm, the curvature radius R of the two sections of the bent waveguides 53 and 54 is 8 μm, the corresponding bending angle theta is 230 degrees, and the length of the whole mode filtering device is about 25 μm.
In FIG. 6, a is the field distribution of 1550nm TE0 mode, b is the field distribution of 1550nm TE1 mode, and c is the insertion loss of 1550nm bands TE0 and TE 1. The insertion loss and extinction ratio of TE0 and TE1 can be adjusted by adjusting W2, L, theta, R and other parameters.
Application example 3
Application example 3 the main part is the same as that of application example 2, the mode filtering device comprises a first tapered waveguide 11 with the width changed from W1 to W2, a curved waveguide 12 and a second tapered waveguide 13 with the width gradually changed from W2 to W1, wherein the first tapered waveguide 11 is connected with the input port 10, and the curved waveguide 12 comprises two sections of waveguides with the curvature radius R and the bending angle theta: 53 and 54 and the second tapered waveguide 13 is connected to the output port 20. The mode filtering device of application example 3 further includes a light absorber 77, and the light absorber 77 is typically made of metal, heavily doped silicon or germanium.
The working mode is as follows: since the waveguide with the width of W2 cuts off the TE polarization high-order mode, which enters the mode filtering device from the input port 10, will leak to the surrounding cladding layer in a large amount when passing through the curved waveguides 53 and 54, and be absorbed by the optical absorber 77, while the fundamental mode TE0 can pass through with extremely low insertion loss, thus completing the elimination of the high-order mode.
The insertion loss and extinction ratio of TE0 and TE1 can be adjusted by adjusting W2, L, theta, R and other parameters.
As shown in fig. 8, an embodiment of the present invention further provides a mold filtering method, including:
In one embodiment, the width of the first tapered waveguide is narrowed from wide, and the width of the end of the first tapered waveguide connected with the curved waveguide is larger than the cutoff width of the retention mode and smaller than the cutoff width of the specified mode.
In an embodiment, the polarized light of the specified mode radiated by the curved waveguide is absorbed by a light absorber disposed outside the first graded waveguide, the curved waveguide, and the second graded waveguide.
Compared with the mode filtering scheme of the related technology, the embodiment of the invention has the advantages of small size, good mode filtering effect and simple design, and can greatly improve the performance of a chip and reduce the noise in the chip.
It will be understood by those of ordinary skill in the art that all or some of the steps of the methods, systems, functional modules/units in the devices disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. In a hardware implementation, the division between functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be performed by several physical components in cooperation. Some or all of the components may be implemented as software executed by a processor, such as a digital signal processor or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). The term computer storage media includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, as is well known to those of ordinary skill in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, Digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can accessed by a computer. In addition, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media as known to those skilled in the art.
Claims (10)
1. The utility model provides a strain mode device which characterized in that, includes first gradual change waveguide, crooked waveguide and the second gradual change waveguide that connects gradually, wherein:
the first gradual change waveguide is used for receiving incident light and cutting off polarized light of a specified mode in the incident light so as to filter the polarized light of the specified mode;
the curved waveguide is used for radiating the polarized light of the designated mode filtered by the first gradually-changed waveguide outwards;
the second tapered waveguide is used for guiding out light passing through the bent waveguide.
2. The mode filtering device of claim 1, wherein the first tapered waveguide has a width that is narrowed from a wide width, wherein the width of the end of the first tapered waveguide that connects to the curved waveguide is narrower than the width of the end that receives the incident light.
3. A mode filtering arrangement according to claim 1, wherein the width of the end of the first tapered waveguide connected to the curved waveguide is greater than the cut-off width of the retained mode and less than the cut-off width of the designated mode.
4. A filter mould arrangement according to claim 1,
the width of the second gradual change waveguide is widened from a narrow width, wherein the width of one end, connected with the bent waveguide, of the second gradual change waveguide is the same as that of one end, connected with the bent waveguide, of the second gradual change waveguide, and the width of one end, connected with the bent waveguide, of the second gradual change waveguide for leading out light is the same as that of one end, connected with the first gradual change waveguide for receiving incident light, of the second gradual change waveguide.
5. A mode filtering arrangement according to claim 1, wherein the curved waveguide comprises one or more segments.
6. A mode filtering arrangement according to claim 1, wherein the first tapered waveguide, the curved waveguide and the second tapered waveguide are externally provided with cladding layers.
7. A filter mould device according to any one of the claims 1 to 6, further comprising: a light-absorbing body having a light-absorbing layer,
the light absorber is arranged outside the first graded waveguide, the bent waveguide and the second graded waveguide, surrounds the first graded waveguide, the bent waveguide and the second graded waveguide, and is used for absorbing the polarized light of the specified mode radiated by the bent waveguide.
8. A method of filtering a mold comprising:
inputting incident light into a first tapered waveguide, and cutting off polarized light of a specified mode in the incident light through the first tapered waveguide so as to filter the polarized light of the specified mode;
radiating the polarized light of the designated mode filtered by the first graded waveguide outwards through a curved waveguide;
and a second tapered waveguide for guiding light out through the curved waveguide.
9. A method according to claim 8, wherein,
the width of the first gradual change waveguide is changed from wide to narrow, and the width of one end, connected with the bent waveguide, of the first gradual change waveguide is larger than the cut-off width of the retention mode and smaller than the cut-off width of the specified mode.
10. A method of filter moulding according to claim 8 or 9,
the polarized light of the specified mode radiated by the curved waveguide is absorbed by a light absorber disposed outside the first tapered waveguide, the curved waveguide, and the second tapered waveguide.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811556143.5A CN111338025A (en) | 2018-12-19 | 2018-12-19 | Mold filtering device and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811556143.5A CN111338025A (en) | 2018-12-19 | 2018-12-19 | Mold filtering device and method |
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| CN111338025A true CN111338025A (en) | 2020-06-26 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114265150A (en) * | 2021-12-16 | 2022-04-01 | 浙江大学 | A compact coil optical waveguide supporting on-chip long-distance low-loss transmission |
| US11353656B1 (en) * | 2020-11-25 | 2022-06-07 | Silc Technologies, Inc. | On-chip polarization control |
| CN115657204A (en) * | 2022-12-05 | 2023-01-31 | 宏芯科技(泉州)有限公司 | Polarization filter |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1862898A (en) * | 2005-03-29 | 2006-11-15 | 日本电气株式会社 | Tunable laser |
| CN104781708A (en) * | 2012-10-18 | 2015-07-15 | Vttoy技术研究中心 | Bent optical waveguide |
| CN105829933A (en) * | 2013-12-25 | 2016-08-03 | 华为技术有限公司 | Waveguide polarization splitter and polarization rotator |
| US20170003451A1 (en) * | 2015-06-30 | 2017-01-05 | Coriant Advanced Technology Llc | Integrated on-chip polarizer |
| CN106461871A (en) * | 2014-03-31 | 2017-02-22 | 华为技术有限公司 | Apparatus and method for waveguide polarizer comprising series of bends |
| US20170351025A1 (en) * | 2016-06-03 | 2017-12-07 | Rockley Photonics Limited | Single mode waveguide with an adiabatic bend |
| CN108700709A (en) * | 2016-03-14 | 2018-10-23 | 日本电气株式会社 | optical branching circuit |
-
2018
- 2018-12-19 CN CN201811556143.5A patent/CN111338025A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1862898A (en) * | 2005-03-29 | 2006-11-15 | 日本电气株式会社 | Tunable laser |
| CN104781708A (en) * | 2012-10-18 | 2015-07-15 | Vttoy技术研究中心 | Bent optical waveguide |
| CN105829933A (en) * | 2013-12-25 | 2016-08-03 | 华为技术有限公司 | Waveguide polarization splitter and polarization rotator |
| CN106461871A (en) * | 2014-03-31 | 2017-02-22 | 华为技术有限公司 | Apparatus and method for waveguide polarizer comprising series of bends |
| US20170003451A1 (en) * | 2015-06-30 | 2017-01-05 | Coriant Advanced Technology Llc | Integrated on-chip polarizer |
| CN108700709A (en) * | 2016-03-14 | 2018-10-23 | 日本电气株式会社 | optical branching circuit |
| US20170351025A1 (en) * | 2016-06-03 | 2017-12-07 | Rockley Photonics Limited | Single mode waveguide with an adiabatic bend |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11353656B1 (en) * | 2020-11-25 | 2022-06-07 | Silc Technologies, Inc. | On-chip polarization control |
| CN114265150A (en) * | 2021-12-16 | 2022-04-01 | 浙江大学 | A compact coil optical waveguide supporting on-chip long-distance low-loss transmission |
| CN114265150B (en) * | 2021-12-16 | 2022-09-06 | 浙江大学 | A compact coil optical waveguide supporting on-chip long-distance low-loss transmission |
| 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 |
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Application publication date: 20200626 |