CN114089481A - Novel wavelength division multiplexer adopting optical waveguide integration technology - Google Patents
Novel wavelength division multiplexer adopting optical waveguide integration technology Download PDFInfo
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- CN114089481A CN114089481A CN202111415094.5A CN202111415094A CN114089481A CN 114089481 A CN114089481 A CN 114089481A CN 202111415094 A CN202111415094 A CN 202111415094A CN 114089481 A CN114089481 A CN 114089481A
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- optical waveguide
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- wavelength division
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- division multiplexer
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- 238000005516 engineering process Methods 0.000 title claims abstract description 19
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- 230000005540 biological transmission Effects 0.000 claims description 17
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 3
- 229920000642 polymer Polymers 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- 239000000377 silicon dioxide Substances 0.000 claims description 3
- 230000010287 polarization Effects 0.000 abstract description 9
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
- G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
- G02B6/29304—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating by diffraction, e.g. grating
- G02B6/29305—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating by diffraction, e.g. grating as bulk element, i.e. free space arrangement external to a light guide
- G02B6/2931—Diffractive element operating in reflection
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/27—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
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
- G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
- G02B6/29304—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating by diffraction, e.g. grating
- G02B6/29305—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating by diffraction, e.g. grating as bulk element, i.e. free space arrangement external to a light guide
- G02B6/29311—Diffractive element operating in transmission
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Optical Integrated Circuits (AREA)
Abstract
The invention relates to the technical field of wavelength division multiplexers, and discloses a novel wavelength division multiplexer adopting an optical waveguide integration technology, which comprises an optical waveguide array, a lens arranged at the optical path output end of the optical waveguide array, and a polarized light reflection device, wherein incident light is input from the optical waveguide array, reaches the polarized light reflection device after being collimated by the lens, is reflected by the polarized light reflection device at different angles, and outputs emergent light from the optical waveguide array after being collimated by the lens. The multiplexing of various wavelengths can be realized through grating diffraction and the design of an input/output optical waveguide array, the waveguide spacing can be smaller than the optical fiber spacing, the number of multiplexed wavelengths can be greatly increased, and the volume of a device is reduced. After the light is reflected by the quarter glass and the reflector, the polarization state of the light is changed, so that the light passing through the grating twice has different polarization states, and the polarization performance of the grating is optimized. The invention has the advantages of novel design, small volume and multiple channels.
Description
Technical Field
The invention relates to the technical field of wavelength division multiplexers, in particular to a novel wavelength division multiplexer adopting an optical waveguide integration technology.
Background
The wavelength division multiplexing device is also called as WDM, that is, a technology of transmitting some optical signals carrying signals but different wavelengths through a single optical fiber, and separating the optical signals carrying different wavelengths to different communication channels at a receiving end by using a certain method, and this method can realize the transmission of multi-channel signals on one optical fiber, and each channel signal is transmitted by light of a certain specific wavelength, that is, a wavelength channel;
the existing wavelength division multiplexing device mainly adopts a filter slide cascade mode, as shown in fig. 1, each stage of filter slide filters out one wavelength by the principle of multilayer thin film interference, and generally filters out light with n wavelengths, and the size is large because n filter slides are required to be cascaded.
Based on this, we propose a novel wavelength division multiplexer using optical waveguide integration technology, and hopefully solve the disadvantage of large volume of multichannel wavelength division multiplexing module in the prior art.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a novel wavelength division multiplexer adopting an optical waveguide integration technology, which has the advantages of small volume and multiple channels.
(II) technical scheme
In order to achieve the purposes of small volume and multiple channels, the invention provides the following technical scheme: the utility model provides an adopt novel wavelength division multiplexer of optical waveguide integrated technology, includes optical waveguide array and sets up the lens at optical waveguide array light path output, still includes polarisation reflect meter, and the incident light is followed optical waveguide array input, reachs polarisation reflect meter after the lens collimation, and polarisation reflect meter reflects the incident light with the angle of difference, exports the emergent light from optical waveguide array after the lens collimation.
As a preferred embodiment of the present invention, the optical waveguide is a glass-based optical waveguide, a silica-based optical waveguide, a silicon-based optical waveguide, a polymer-based optical waveguide, or an InP optical waveguide.
As a preferred embodiment of the present invention, the incident light transmits light of n different wavelengths.
In a preferred embodiment of the present invention, the polarized light reflecting device reflects n lights with different wavelengths in incident light at different angles.
As a preferred technical solution of the present invention, the polarized light reflection device includes a transmission grating and a reflection mirror, the incident light collimated by the lens reaches the transmission grating, the transmission grating divides the light with different wavelengths into light with different angles, and then the light is reflected and reflected by the reflection mirror.
As a preferable technical solution of the present invention, a quarter glass is disposed between the transmission grating and the reflecting mirror.
In a preferred embodiment of the present invention, the polarized light reflecting device is a reflection grating, and the incident light collimated by the lens reaches the reflection grating, and the reflection grating reflects light of different wavelengths at different angles and turns the light back to the lens.
(III) advantageous effects
Compared with the prior art, the invention provides a novel wavelength division multiplexer adopting an optical waveguide integration technology, which has the following beneficial effects:
1. this novel wavelength division multiplexer who adopts optical waveguide integrated technology through grating diffraction and input output optical waveguide array design, can realize multiplexing of various wavelengths, and the waveguide interval can be less than the optic fibre interval, can increase substantially multiplexing wavelength quantity, reduces the device volume.
2. According to the novel wavelength division multiplexer adopting the optical waveguide integration technology, after light is reflected by the quarter glass and the reflector, the polarization state of the light is changed, so that the light passing through the grating twice has different polarization states, and the polarization performance of the grating is optimized.
Drawings
FIG. 1 is a schematic diagram of a prior art optical waveguide integrated splitter of a wavelength division multiplexer;
FIG. 2 is a schematic view of a first embodiment of the present invention;
FIG. 3 is a schematic view of a second embodiment of the present invention;
fig. 4 is a schematic view of a third embodiment of the present invention.
In the figure: 1. an optical waveguide array; 2. a lens; 3. a transmission grating; 4. a quarter glass slide; 5. a mirror; 6. a reflective grating.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
The first embodiment is as follows:
referring to fig. 2, a novel wavelength division multiplexer using optical waveguide integration technology includes an optical waveguide array 1 and a lens 2 disposed at an optical path output end of the optical waveguide array 1, where the lens is used to collimate light exiting from the waveguide and focus incident light, and in this embodiment, the lens 2 may be single or arranged in an array;
the polarized light reflection device is used for reflecting the incident light at different angles, outputting emergent light from the optical waveguide array 1 after being collimated by the lens 2, transmitting n lights with different wavelengths by the incident light, and reflecting the n lights with different wavelengths in the incident light at different angles;
in this embodiment, as shown in fig. 2, the polarized light reflection device includes a transmission grating 3 and a reflection mirror 5, the incident light collimated by the lens 2 reaches the transmission grating 3, the transmission grating 3 divides the light with different wavelengths into lights with different angles, and then the lights are reflected and reflected by the reflection mirror 5, the reflected and reflected lights pass through the transmission grating 3 and the lens 2 again, and finally enter the optical waveguide array 1 to output emergent light, so as to implement a wavelength division multiplexing function, where the optical path is reversible, the forward direction of the optical path is a wavelength division function, and the reverse direction is a wavelength combination function.
In this embodiment, the optical waveguide array 1 is a glass-based optical waveguide, a silica-based optical waveguide, a silicon-based optical waveguide, a polymer-based optical waveguide, or an InP optical waveguide, and may also be other types of optical waveguide arrays 1, the size and the distance of the optical waveguide array 1 may be adjusted according to actual needs, the distance between the optical waveguide array 1 and the side close to the lens 2 may be adjusted according to the distance of the required filtering wavelength, which is generally less than 130um, the other side of the optical waveguide array 1 is coupled with an optical fiber, and the waveguide distance is consistent with the optical fiber distance.
Example two:
referring to fig. 3, different from the first embodiment, a quarter glass 4 is further disposed between the transmission grating 3 and the reflector 5, light with different wavelengths is output from the transmission grating 3 as light beams with different angles, the light beams with different angles pass through the quarter glass 4 and then return through the reflector 5, the light beams pass through the quarter glass 4, the transmission grating 3 and the lens 2 for the second time in the return process and finally enter the n-channel light-emitting waveguide array 1, so as to implement a wavelength division multiplexing function, the light path is reversible, the forward direction of the light path is a wavelength division function, and the reverse direction of the light path is a wavelength combination function;
in this embodiment, after light passes through the quarter glass 4 back and forth, the polarization state of the light changes, so that the light passing through the grating twice has different polarization states, and the polarization performance of the grating is optimized.
Example three:
referring to fig. 4, unlike the first embodiment, the light deflecting device in the present embodiment is a reflective grating 6, which further reduces the volume of the device; the incident light of the optical waveguide array 1 inputs optical signals lambda 1 and lambda 2 … lambda n with different wavelengths, the input optical signals enter the reflection grating 6 after being collimated by the lens 2, the reflection grating 6 is used for reflecting the light with different wavelengths at different angles, the difference of the reflection angles is related to the different wavelengths, the light with different wavelengths returns to the lens 2 at different reflection angles, and finally enters the n-channel light-emitting waveguide array 1, so that the wavelength division multiplexing function is realized, the light path is reversible, the forward direction of the light path is the wavelength division function, and the reverse direction is the wave combination function.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The utility model provides an adopt novel wavelength division multiplexer of optical waveguide integrated technology, includes optical waveguide array (1) and sets up lens (2) at optical waveguide array (1) light path output, its characterized in that: the light guide plate is characterized by further comprising a polarized light reflection device, incident light is input from the light guide array (1), and reaches the polarized light reflection device after being collimated by the lens (2), the polarized light reflection device reflects the incident light at different angles, and emergent light is output from the light guide array (1) after being collimated by the lens (2).
2. A novel wavelength division multiplexer using optical waveguide integration technology according to claim 1, wherein: the light-incident waveguide is a glass-based optical waveguide, a silica-based optical waveguide, a silicon-based optical waveguide, a polymer-based optical waveguide or an InP optical waveguide.
3. A novel wavelength division multiplexer using optical waveguide integration technology according to claim 1, wherein: the incident light transmits light of n different wavelengths.
4. A novel wavelength division multiplexer using optical waveguide integration technology according to claim 3, wherein: the polarized light reflecting device reflects n different wavelengths of light in incident light at different angles.
5. The new wavelength division multiplexer using optical waveguide integration technology as claimed in claim 4, wherein: the polarized light reflection device comprises a transmission grating (3) and a reflection mirror (5), incident light collimated by a lens (2) reaches the transmission grating (3), and the transmission grating (3) divides light with different wavelengths into light with different angles, and then the light is reflected and reflected by the reflection mirror (5).
6. The new wavelength division multiplexer using optical waveguide integration technology as claimed in claim 5, wherein: a quarter glass slide (4) is arranged between the transmission grating (3) and the reflector (5).
7. The new wavelength division multiplexer using optical waveguide integration technology as claimed in claim 4, wherein: the polarized light reflecting device is a reflecting grating (6), incident light collimated by the lens (2) reaches the reflecting grating (6), and the reflecting grating (6) reflects light with different wavelengths at different angles so as to be reflected back to the lens (2).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111415094.5A CN114089481A (en) | 2021-11-25 | 2021-11-25 | Novel wavelength division multiplexer adopting optical waveguide integration technology |
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| CN202111415094.5A CN114089481A (en) | 2021-11-25 | 2021-11-25 | Novel wavelength division multiplexer adopting optical waveguide integration technology |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114966987A (en) * | 2022-06-10 | 2022-08-30 | 深圳市砺芯科技有限公司 | Optical waveguide chip hybrid integrated wave splitting-wave combining device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6563977B1 (en) * | 2000-06-27 | 2003-05-13 | Bayspec, Inc. | Compact wavelength multiplexer-demultiplexer providing low polarization sensitivity |
| CN204790067U (en) * | 2015-06-25 | 2015-11-18 | 昂纳信息技术（深圳）有限公司 | Tunable filter of grating type |
| CN208444050U (en) * | 2018-08-10 | 2019-01-29 | 河北志方通信设备有限公司 | A kind of visible light wave division multiplexer |
| CN111965762A (en) * | 2020-09-07 | 2020-11-20 | 深圳市欧亿光电技术有限公司 | Grating wavelength division multiplexing device |
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2021
- 2021-11-25 CN CN202111415094.5A patent/CN114089481A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6563977B1 (en) * | 2000-06-27 | 2003-05-13 | Bayspec, Inc. | Compact wavelength multiplexer-demultiplexer providing low polarization sensitivity |
| CN204790067U (en) * | 2015-06-25 | 2015-11-18 | 昂纳信息技术（深圳）有限公司 | Tunable filter of grating type |
| CN208444050U (en) * | 2018-08-10 | 2019-01-29 | 河北志方通信设备有限公司 | A kind of visible light wave division multiplexer |
| CN111965762A (en) * | 2020-09-07 | 2020-11-20 | 深圳市欧亿光电技术有限公司 | Grating wavelength division multiplexing device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114966987A (en) * | 2022-06-10 | 2022-08-30 | 深圳市砺芯科技有限公司 | Optical waveguide chip hybrid integrated wave splitting-wave combining device |
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