CN107179617B - High-speed electro-optic modulator and preparation method thereof - Google Patents
High-speed electro-optic modulator and preparation method thereof Download PDFInfo
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- CN107179617B CN107179617B CN201710630998.7A CN201710630998A CN107179617B CN 107179617 B CN107179617 B CN 107179617B CN 201710630998 A CN201710630998 A CN 201710630998A CN 107179617 B CN107179617 B CN 107179617B
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- 238000002360 preparation method Methods 0.000 title abstract description 7
- 239000013307 optical fiber Substances 0.000 claims abstract description 49
- 239000000382 optic material Substances 0.000 claims abstract description 31
- 229920000642 polymer Polymers 0.000 claims abstract description 30
- 239000000835 fiber Substances 0.000 claims abstract description 26
- 238000012681 fiber drawing Methods 0.000 claims abstract description 9
- 238000004804 winding Methods 0.000 claims abstract description 9
- 230000010287 polarization Effects 0.000 claims description 32
- 239000000463 material Substances 0.000 claims description 17
- 238000010438 heat treatment Methods 0.000 claims description 16
- 238000000576 coating method Methods 0.000 claims description 11
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 10
- 239000011248 coating agent Substances 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 5
- 230000028161 membrane depolarization Effects 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 2
- 239000007888 film coating Substances 0.000 claims 1
- 238000009501 film coating Methods 0.000 claims 1
- 229920002521 macromolecule Polymers 0.000 claims 1
- 239000000758 substrate Substances 0.000 claims 1
- 230000003287 optical effect Effects 0.000 abstract description 17
- 239000004065 semiconductor Substances 0.000 abstract description 4
- 239000013078 crystal Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 3
- JBRZTFJDHDCESZ-UHFFFAOYSA-N AsGa Chemical compound [As]#[Ga] JBRZTFJDHDCESZ-UHFFFAOYSA-N 0.000 description 2
- 229910001218 Gallium arsenide Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000002103 nanocoating Substances 0.000 description 2
- WSMQKESQZFQMFW-UHFFFAOYSA-N 5-methyl-pyrazole-3-carboxylic acid Chemical compound CC1=CC(C(O)=O)=NN1 WSMQKESQZFQMFW-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- GQYHUHYESMUTHG-UHFFFAOYSA-N lithium niobate Chemical compound [Li+].[O-][Nb](=O)=O GQYHUHYESMUTHG-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/061—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on electro-optical organic material
- G02F1/065—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on electro-optical organic material in an optical waveguide structure
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
Abstract
The invention discloses a high-speed electro-optic modulator, comprising: the micro-nano optical fiber coupler is formed by winding two single-mode fibers together and placing the two single-mode fibers into an optical fiber drawing platform for drawing; the high polymer electro-optic material layer is coated on the micro-nano optical fiber coupler; and the electrode plate is arranged near the outside of the high polymer electro-optic material layer. The preparation method of the novel high-speed electro-optical modulator provided by the invention is used for efficiently and rapidly preparing the electro-optical modulator with high modulation speed, small optical signal loss, high signal-to-noise ratio and low cost, when laser emitted by the semiconductor laser is injected into the device from the input end of the electro-optical modulator, the electrode simultaneously applies electric signals to the two ends of the electrode plate, the change of the surface refractive index of the unit can change to cause the change of resonance wavelength, the change of the optical power of the output end is influenced, and finally, the optical signal consistent with the change of the electric signals is obtained, so that the novel high-speed electro-optical modulator can be used in the field of optical communication, and the problems of high cost, low modulation speed, low signal-to-noise ratio and the like of the conventional electro-optical modulator are solved.
Description
Technical Field
The invention belongs to the technical field of optical communication, and particularly relates to a novel high-speed electro-optical modulator and a preparation method thereof.
Background
Optical fiber communication is rapidly becoming the current information transmission because of its advantages such as large bandwidth and large capacityIs a major form of (c). However, to achieve fiber optic communication, signals must first be loaded onto the emitted light beam of the light source, which requires optical modulation. Modulators that are critical components of fiber optic communication systems are therefore becoming increasingly interesting. The electro-optic modulator manufactured according to the electro-optic effect is a modulator which is widely applied in high-speed optical communication at present, wherein the electro-optic effect is that when voltage is applied to an electro-optic crystal, the refractive index of the electro-optic crystal changes, and the change of the optical wave characteristics passing through the crystal is caused as a result, so that the modulation of an optical signal is realized. Typical electro-optic modulators utilize certain electro-optic crystals, such as lithium niobate crystals (LiNbO) 3 ) Gallium arsenide crystal (GaAs) and lithium tantalate crystal (LiTaO) 3 ) However, these types of electro-optic modulators have high cost, slow modulation speed and low signal to noise ratio, so it is important how to produce electro-optic modulators with better performance and more economical price.
Disclosure of Invention
It is an object of the present invention to address at least the above problems and/or disadvantages and to provide at least the advantages described below.
To achieve these objects and other advantages and in accordance with the purpose of the invention, there is provided a high-speed electro-optical modulator, comprising:
the micro-nano optical fiber coupler is formed by winding two single-mode fibers together and placing the two single-mode fibers into an optical fiber drawing platform for drawing;
the high polymer electro-optic material layer is coated on the micro-nano optical fiber coupler;
and the electrode plate is arranged near the outside of the high polymer electro-optic material layer.
Preferably, the micro-nano optical fiber coupler has a lateral width of 4-6 μm.
Preferably, the single mode fiber is an SMF28 single mode fiber.
Preferably, the thickness of the high polymer electro-optic material layer is 70-200nm.
Preferably, the polymer electro-optic material layer is a second-order nonlinear light emitting group material layer.
The invention also discloses a preparation method of the high-speed electro-optic modulator, which comprises the following steps:
winding two single-mode fibers together, and placing the two single-mode fibers into an optical fiber drawing platform to draw the micro-nano optical fiber coupler;
step two, putting the micro-nano optical fiber coupler into a high polymer electro-optic material solution, and coating a high polymer electro-optic material layer on the surface of the micro-nano optical fiber coupler by adopting a lifting coating method;
step three, placing the micro-nano optical fiber coupler coated with the high polymer electro-optic material layer in the middle of the ITO electrode for polarization, and simultaneously placing the whole polarization device in an incubator to heat the polarization device, and maintaining polarization voltage in the heating process; and slowly cooling to room temperature after heating, removing depolarization voltage, completing polarization, and applying electrode plates near the outer part of the high-polymer electro-optic material layer to obtain the high-speed electro-optic modulator.
Preferably, the lateral width of the micro-nano optical fiber coupler is 4-6 μm; the single mode fiber is SMF28 single mode fiber.
Preferably, the polymer electro-optic material solution is a second-order nonlinear light emitting group material acetone solution, and the thickness of the polymer electro-optic material layer is 70-200nm.
Preferably, in the third step, the distance between the ITO electrodes is 2-4mm, and the polarization voltage is 8000-10000V; the heating temperature of the polarization device is 135-140 ℃; the duration of the whole heating and pressurizing process is 8-15 minutes.
Preferably, in the second step, the pulling speed of the pulling-up coating method is 100 to 500mm/min.
The invention at least comprises the following beneficial effects: the preparation method of the novel high-speed electro-optical modulator provided by the invention is used for efficiently and rapidly preparing the electro-optical modulator with high modulation speed, small optical signal loss, high signal-to-noise ratio and low cost, when laser emitted by the semiconductor laser is injected into the device from the input end of the electro-optical modulator, the electrode simultaneously applies electric signals to the two ends of the electrode plate, the change of the surface refractive index of the unit can change to cause the change of resonance wavelength, the change of the optical power of the output end is influenced, and finally, the optical signal consistent with the change of the electric signals is obtained, so that the novel high-speed electro-optical modulator can be used in the field of optical communication, and the problems of high cost, low modulation speed, low signal-to-noise ratio and the like of the conventional electro-optical modulator are solved.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Description of the drawings:
FIG. 1 is a schematic diagram of an electro-optic modulator of the present invention;
fig. 2 is a molecular structure diagram of a second order nonlinear light emissive group material (DLD 164, r=r1);
wherein 1 is an input end, 2 is an electrode plate, 3 is a micro-nano optical fiber coupler, 4 is a high polymer electro-optic material layer, and 5 is an output end.
The specific embodiment is as follows:
the present invention is described in further detail below with reference to the drawings to enable those skilled in the art to practice the invention by referring to the description.
It will be understood that terms, such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.
Fig. 1 shows a high-speed electro-optic modulator of the present invention comprising:
the micro-nano optical fiber coupler 3 is formed by winding two single-mode optical fibers together and placing the two single-mode optical fibers into an optical fiber drawing platform for drawing; the micro-nano optical fiber coupler 3 is provided with an input end 1 and an output end 5;
a polymer electro-optic material layer 4 which is coated on the micro-nano optical fiber coupler 3;
and an electrode plate 2 disposed in the vicinity of the outside of the polymer electro-optic material layer 4.
In the technical scheme, when laser emitted by a semiconductor laser is injected into the micro-nano optical fiber coupler 3 from the input end 1 of an electro-optic modulator, an electric signal is simultaneously applied to two ends of the electrode plate 2 outside the high polymer electro-optic material layer, so that the surface refractive index of the micro-nano optical fiber coupler 3 is changed to cause the change of resonance wavelength, the change of the optical power of the output end is influenced, and finally an optical signal consistent with the change of the electric signal is obtained. In the technical scheme, the transverse width of the micro-nano optical fiber coupler is 4-6 mu m, and the mode is adopted, so that the signal-to-noise ratio is high and stable.
In the above technical solution, the single mode fiber is an SMF28 single mode fiber.
In the technical scheme, the thickness of the high polymer electro-optic material layer is 70-200nm, and the modulation effect is obvious by adopting the thickness.
In the above technical solution, the polymer electro-optic material layer is a second-order nonlinear light emitting group material layer ((DLD 164, r=r1)), and the structural formula is shown in fig. 2, and the specific preparation method is literature "Matrix-Assisted Poling of Monolithic Bridge-Disubstituted Organic NLO Chromophores", "Chemistry of Materials", 2014, 26 (2): 872-874.
Example 1:
a method of making a high-speed electro-optic modulator comprising the steps of:
winding two SMF28 single-mode fibers together, and placing the two SMF28 single-mode fibers into an optical fiber drawing platform to draw the SMF into a micro-nano optical fiber coupler with the transverse width of 6 mu m;
step two, putting the micro-nano optical fiber coupler into a second-order nonlinear light emitting group material layer (DLD 164, R=R1) acetone solution, and coating the second-order nonlinear light emitting group material layer (DLD 164, R=R1) with the thickness of 200nm on the surface of the micro-nano optical fiber coupler at the speed of 500mm/min by adopting a pulling coating method;
step three, placing the micro-nano optical fiber coupler coated with the second-order nonlinear light emission group material layer (DLD 164, R=R1) in the middle of an ITO electrode with the distance of 4mm for polarization, wherein the polarization voltage is 10000V, and simultaneously placing the whole polarization device in a constant temperature box for heating the polarization device to 135 ℃, and maintaining the polarization voltage in the heating process for 8min; and slowly cooling to room temperature after heating, removing depolarization voltage, completing polarization, and applying electrode plates near the outer part of the high-polymer electro-optic material layer to obtain the high-speed electro-optic modulator.
When the laser emitted by the semiconductor laser is injected into the micro-nano optical fiber coupler from the input end of the electro-optic modulator, an electric signal is simultaneously applied to two ends of an electrode plate outside the high polymer electro-optic material layer, so that the surface refractive index of the micro-nano optical fiber coupler is changed to change the resonance wavelength, the change of the optical power of the output end is influenced, and finally an optical signal consistent with the change of the electric signal is obtained.
Example 2:
a method of making a high-speed electro-optic modulator comprising the steps of:
winding two SMF28 single-mode fibers together, and placing the two SMF28 single-mode fibers into an optical fiber drawing platform to draw the SMF into a micro-nano optical fiber coupler with the transverse width of 4 mu m;
step two, putting the micro-nano optical fiber coupler into a second-order nonlinear light emitting group material layer (DLD 164, R=R1) acetone solution, and coating the second-order nonlinear light emitting group material layer (DLD 164, R=R1) with the thickness of 70nm on the surface of the micro-nano optical fiber coupler at the speed of 100mm/min by adopting a pulling coating method;
step three, micro-nano coating the second-order nonlinear light emitting group material layer (DLD 164, R=R1)
The optical fiber coupler is placed in the middle of an ITO electrode with the distance of 2mm for polarization, the polarization voltage is 8000V, and meanwhile, the whole polarization device is placed in a constant temperature box, the polarization device is heated to 140 ℃, and the polarization voltage is maintained for 15min in the heating process; and slowly cooling to room temperature after heating, removing depolarization voltage, completing polarization, and applying electrode plates near the outer part of the high-polymer electro-optic material layer to obtain the high-speed electro-optic modulator.
Example 3:
a method of making a high-speed electro-optic modulator comprising the steps of:
winding two SMF28 single-mode fibers together, and placing the two SMF28 single-mode fibers into an optical fiber drawing platform to draw the SMF into a micro-nano optical fiber coupler with the transverse width of 3 mu m;
step two, putting the micro-nano optical fiber coupler into a second-order nonlinear light emitting group material layer (DLD 164, R=R1) acetone solution, and coating the second-order nonlinear light emitting group material layer (DLD 164, R=R1) with the thickness of 120nm on the surface of the micro-nano optical fiber coupler at the speed of 300mm/min by adopting a pulling coating method;
step three, micro-nano coating the second-order nonlinear light emitting group material layer (DLD 164, R=R1)
The optical fiber coupler is placed in the middle of an ITO electrode with the distance of 3mm for polarization, the polarization voltage is 900V, and meanwhile, the whole polarization device is placed in a constant temperature box, the polarization device is heated to 137 ℃, and the polarization voltage is maintained for 10min in the heating process; and slowly cooling to room temperature after heating, removing depolarization voltage, completing polarization, and applying electrode plates near the outer part of the high-polymer electro-optic material layer to obtain the high-speed electro-optic modulator.
Although embodiments of the present invention have been disclosed above, it is not limited to the details and embodiments shown and described, it is well suited to various fields of use for which the invention would be readily apparent to those skilled in the art, and accordingly, the invention is not limited to the specific details and illustrations shown and described herein, without departing from the general concepts defined in the claims and their equivalents.
Claims (1)
1. A method of making a high-speed electro-optic modulator comprising the steps of:
winding two single-mode fibers together, and placing the two single-mode fibers into an optical fiber drawing platform to draw the micro-nano optical fiber coupler;
step two, placing the micro-nano optical fiber coupler into a high polymer electro-optic material solution, and adopting a lifting coating film
Coating a high polymer electro-optic material layer on the surface of the substrate;
step three, placing the micro-nano optical fiber coupler coated with the high polymer electro-optic material layer in the middle of the ITO electrode
Carrying out polarization, putting the whole polarization device into an incubator, heating the polarization device, and maintaining polarization voltage in the heating process; slowly cooling to room temperature after heating, removing depolarization voltage, completing polarization, and applying electrode plates near the outer part of the high polymer electro-optic material layer to obtain a high-speed electro-optic modulator;
the transverse width of the micro-nano optical fiber coupler is 4-6 mu m; the single mode fiber is formed by drawing an SMF28 single mode fiber;
the high polymer electro-optic material solution is a second-order nonlinear light emission group material acetone solution, and the thickness of the high polymer electro-optic material layer is 200nm;
in the third step, the distance between the ITO electrodes is 4mm, and the polarization voltage is 10000V; the heating temperature of the polarization device is 135 ℃; the duration of the whole heating and pressurizing process is 8 minutes;
in the second step, the pulling speed of the pulling coating method is 500mm/min;
wherein the structure of the high-speed electro-optic modulator comprises:
the micro-nano optical fiber coupler is formed by winding two single-mode fibers together and placing the two single-mode fibers into an optical fiber drawing platform for drawing;
the high polymer electro-optic material layer is coated on the micro-nano optical fiber coupler;
an electrode plate which is arranged near the outside of the macromolecule electro-optic material layer;
the high polymer electro-optic material layer is a second-order nonlinear light emitting group material layer;
the structural formula of the second-order nonlinear light emission group material layer is as follows:
and R is 1 Is of the structure of
。
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| CN201710630998.7A CN107179617B (en) | 2017-07-28 | 2017-07-28 | High-speed electro-optic modulator and preparation method thereof |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103217814A (en) * | 2013-04-22 | 2013-07-24 | 哈尔滨工程大学 | Optical electro-optic intensity modulator and preparation method thereof |
| CN106896277A (en) * | 2017-04-27 | 2017-06-27 | 北京航空航天大学 | A kind of electric-field sensor based on micro-nano optical fiber evanescent field and electro-optic polymer |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2001131068A (en) * | 2001-11-19 | 2003-08-20 | ООО "Оптива-Технологи " | Controlled electro-optical device, method for its manufacture and electro-optical anisotropic film crystal |
| CN106019478B (en) * | 2016-05-12 | 2019-07-23 | 西安交通大学 | Highly sensitive pyrometric cone coupled mode micro-nano fiber ultrasonic testing system and its coupler production method |
| CN207067573U (en) * | 2017-07-28 | 2018-03-02 | 中国工程物理研究院激光聚变研究中心 | High-speed electro-optic modulator |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103217814A (en) * | 2013-04-22 | 2013-07-24 | 哈尔滨工程大学 | Optical electro-optic intensity modulator and preparation method thereof |
| CN106896277A (en) * | 2017-04-27 | 2017-06-27 | 北京航空航天大学 | A kind of electric-field sensor based on micro-nano optical fiber evanescent field and electro-optic polymer |
Non-Patent Citations (2)
| Title |
|---|
| High Sensitivity Fiber Refractometer Based on an Optical Microfiber Coupler;Bo Lin等;《IEEE PHOTONICS TECHNOLOGY LETTERS》;第25卷(第3期);228-230 * |
| Matrix-Assisted Poling of Monolithic Bridge-Disubstituted Organic NLO Chromophores;Delwin L等;《Chemistry of Materials》;第26卷(第2期);872-874 * |
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