CN111552134B - High-low temperature optical modulator - Google Patents
High-low temperature optical modulator Download PDFInfo
- Publication number
- CN111552134B CN111552134B CN202010472304.3A CN202010472304A CN111552134B CN 111552134 B CN111552134 B CN 111552134B CN 202010472304 A CN202010472304 A CN 202010472304A CN 111552134 B CN111552134 B CN 111552134B
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- Prior art keywords
- nonlinear crystal
- gold
- metal shell
- plating surface
- heat
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- 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
- G02F1/35—Non-linear optics
- G02F1/3501—Constructional details or arrangements of non-linear optical devices, e.g. shape of non-linear crystals
-
- 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
- G02F1/35—Non-linear optics
- G02F1/355—Non-linear optics characterised by the materials used
- G02F1/3551—Crystals
-
- 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
- G02F1/35—Non-linear optics
- G02F1/355—Non-linear optics characterised by the materials used
- G02F1/3551—Crystals
- G02F1/3553—Crystals having the formula MTiOYO4, where M=K, Rb, TI, NH4 or Cs and Y=P or As, e.g. KTP
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
Abstract
A high and low temperature optical modulator comprising: the heat-conducting insulating elastic material layer is arranged between the anode gold-plating surface and the metal shell and used for keeping the temperature of the metal shell consistent with that of the nonlinear crystal, the voltage of the anode gold-plating surface consistent with that of an external circuit anode and generating deformation along with the nonlinear crystal and the anode gold-plating surface so as to eliminate the stress of the nonlinear crystal; the heat-conducting and electricity-conducting elastic material layer is arranged between the negative gold-plating surface and the metal shell and used for keeping the temperature of the metal shell consistent with that of the nonlinear crystal, keeping the voltage of the metal shell consistent with that of the negative gold-plating surface and generating deformation along with the nonlinear crystal and the negative gold-plating surface so as to eliminate the stress of the nonlinear crystal. The power supply and the heating uniformity of the crystal electrode are ensured, the stress generated by the nonlinear crystal and the gold-plated surface is effectively eliminated, the stability of the crystal is improved, the working parameters can be kept stable within a wide temperature range, and the service life of the device is prolonged.
Description
The technical field is as follows:
the invention relates to an optical modulator in the laser field and the optical communication field, in particular to a high-low temperature optical modulator.
Background art:
the conventional nonlinear crystal electro-optic modulator adopts a structure that a modulating electric field is added transversely or longitudinally and light is transmitted along the direction of an optical axis, and gold plating is needed to be carried out on two electrode surfaces of a crystal, and a variable high-voltage electric field is introduced by gold plating electrodes. The nonlinear crystal can generate expansion with heat and contraction with cold when used in high and low temperature environments, the gold-plated electrode of the current nonlinear crystal is in rigid contact with the shell, the stress caused by the rigid direct connection mode can cause negative effects such as displacement and deformation on the electro-optic crystal or the crystal clamp, and the stress can affect the optical uniformity of the crystal, so that the birefringence parameters, the extinction ratio and the like of the crystal are changed.
The invention content is as follows:
in order to make up for the defects of the prior art, the invention provides the high-low temperature optical modulator, which effectively eliminates the stress generated by the crystal and the gold-plated surface, can keep stable working parameters in a wide temperature range, and solves the problems in the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a high and low temperature optical modulator comprising:
the metal shell is provided with a positive terminal and a negative terminal, a nonlinear crystal is arranged in the metal shell, and a positive gold-plating surface and a negative gold-plating surface are arranged on the nonlinear crystal;
the heat-conducting insulating elastic material layer is arranged between the anode gold-plating surface and the metal shell, the anode wiring terminal passes through the heat-conducting insulating elastic material layer to be connected with the anode gold-plating surface, and the heat-conducting insulating elastic material layer is used for keeping the temperature of the metal shell consistent with that of the nonlinear crystal, keeping the voltage of the anode gold-plating surface consistent with that of the anode of an external circuit, and generating deformation along with the nonlinear crystal and the anode gold-plating surface so as to eliminate the stress of the nonlinear crystal;
the heat-conducting and electricity-conducting elastic material layer is arranged between the negative gold-plating surface and the metal shell and used for keeping the temperature of the metal shell consistent with that of the nonlinear crystal, keeping the voltage of the metal shell consistent with that of the negative gold-plating surface and generating deformation along with the nonlinear crystal and the negative gold-plating surface so as to eliminate the stress of the nonlinear crystal.
The heat-conducting insulating elastic material layer adopts a heat-conducting insulating silica gel strip.
The thermal expansion coefficient of the heat-conducting insulating elastic material layer is the same as that of the nonlinear crystal.
The heat and electricity conducting elastic material layer is made of heat and electricity conducting silica gel strips.
The thermal expansion coefficient of the heat-conducting and electricity-conducting elastic material layer is the same as that of the nonlinear crystal.
The nonlinear crystal includes, but is not limited to KDP, DKDP, KTP, RTP, LN, BBO, LBO, CLBO, BIBO, KTA, ADP, lithium iodate crystals and rare earth doped crystal compounds thereof.
The metal shell is internally provided with a hollow structure.
By adopting the scheme, the invention has the following beneficial effects:
the heat-conducting insulating elastic material layer and the heat-conducting electric-conducting elastic material layer are adopted, so that the power supply and the uniform heating of the crystal electrode are ensured, the stress generated by the nonlinear crystal and the gold-plated surface is effectively eliminated, the stability of the crystal is improved, the working parameters can be kept stable in a wide temperature range, the performance of the device is improved, and the service life of the device is prolonged; and because a relatively flexible fixing structure is introduced on the nonlinear crystal, the vibration resistance of the nonlinear crystal can be increased to a certain extent.
Description of the drawings:
FIG. 1 is a schematic structural diagram of the present invention.
In the figure, 1, a metal shell, 2, a positive terminal, 3, a negative terminal, 4, a nonlinear crystal, 5, a positive gold-plating surface, 6, a negative gold-plating surface, 7, a heat-conducting insulating elastic material layer, 8, a heat-conducting electric-conducting elastic material layer, 9 and a hollow structure.
The specific implementation mode is as follows:
in order to clearly explain the technical features of the present invention, the following detailed description of the present invention is provided with reference to the accompanying drawings.
As shown in fig. 1, a high and low temperature optical modulator includes:
the metal shell comprises a metal shell 1, wherein a positive terminal 2 and a negative terminal 3 are arranged on the metal shell 1, a nonlinear crystal 4 is arranged in the metal shell 1, and a positive gold-plating surface 5 and a negative gold-plating surface 6 are arranged on the nonlinear crystal 4;
the heat-conducting insulating elastic material layer 7 is arranged between the anode gold-plating surface 5 and the metal shell 1, the anode wiring terminal 2 penetrates through the heat-conducting insulating elastic material layer 7 through a metal connecting wire to be connected with the anode gold-plating surface 5, and the heat-conducting insulating elastic material layer 7 is used for keeping the temperature of the metal shell 1 consistent with that of the nonlinear crystal 4, keeping the voltage of the anode gold-plating surface 5 consistent with that of an external circuit anode, and deforming along with the nonlinear crystal 4 and the anode gold-plating surface 5 to eliminate the stress of the nonlinear crystal 4;
and the heat and electricity conducting elastic material layer 8 is arranged between the negative gold-plating surface 6 and the metal shell 1, and the heat and electricity conducting elastic material layer 8 is used for keeping the temperature of the metal shell 1 consistent with that of the nonlinear crystal 4, keeping the voltage of the metal shell 1 consistent with that of the negative gold-plating surface 6, and generating deformation along with the nonlinear crystal 4 and the negative gold-plating surface 6 so as to eliminate the stress of the nonlinear crystal 4.
The high-low temperature optical modulator modulates the nonlinear effect in the nonlinear crystal by applying voltage to the positive electrode and the negative electrode, and achieves the purpose of optical switching by switching between pressurization and depressurization.
The heat-conducting insulating elastic material layer adopts a heat-conducting insulating silica gel strip.
The thermal expansion coefficient of the thermally conductive and insulating elastic material layer 7 is the same as that of the nonlinear crystal.
The heat and electricity conducting elastic material layer is made of heat and electricity conducting silica gel strips.
The thermal expansion coefficient of the thermally and electrically conductive elastic material layer 8 is the same as the nonlinear crystal.
The heat-conducting insulating elastic material layer 7 and the heat-conducting electric-conducting elastic material layer 8 can ensure good heat exchange between the nonlinear crystal 4 in the optical modulator and the metal shell 1, so that the temperature of each part of the metal shell 1 and the nonlinear crystal 4 is kept consistent, and stress generated by the nonlinear crystal 4 due to different temperatures is avoided; when the nonlinear crystal 4 and the gold-plated surface generate expansion with heat and contraction with cold, the expansion with heat and contraction with cold can be synchronously generated, and direct rigid contact between the nonlinear crystal 4 and the gold-plated surface and the metal shell 1 is avoided, so that the stress of the metal shell 1 on the nonlinear crystal 4 and the gold-plated surface is effectively eliminated, the stability of the nonlinear crystal 4 is improved, and the nonlinear crystal 4 can keep stable working parameters within a wide temperature range; in addition, the hollow structure 9 is arranged in the metal shell 1, so that the metal shell 1 has certain deformation capacity, even if the nonlinear crystal 4, the gold-plated surface, the heat-conducting insulating elastic material layer 7 and the heat-conducting electric elastic material layer 8 deform too much, the metal shell 1 can deform to a certain extent, stress on the nonlinear crystal 4 is completely eliminated, and the stability of the nonlinear crystal 4 is ensured.
The nonlinear crystal 4 includes, but is not limited to, KDP, DKDP, KTP, RTP, LN, BBO, LBO, CLBO, BIBO, KTA, ADP, lithium iodate crystals and rare earth doped crystal compounds thereof, preferably, LN crystals are used in the present invention.
The above-described embodiments should not be construed as limiting the scope of the invention, and any alternative modifications or alterations to the embodiments of the present invention will be apparent to those skilled in the art.
The present invention is not described in detail, but is known to those skilled in the art.
Claims (4)
1. A high and low temperature optical modulator, characterized by: the method comprises the following steps:
the metal shell is provided with a positive terminal and a negative terminal, a nonlinear crystal is arranged in the metal shell, and a positive gold-plating surface and a negative gold-plating surface are arranged on the nonlinear crystal;
the heat-conducting insulating elastic material layer is arranged between the anode gold-plating surface and the metal shell, the anode wiring terminal passes through the heat-conducting insulating elastic material layer to be connected with the anode gold-plating surface, and the heat-conducting insulating elastic material layer is used for keeping the temperature of the metal shell consistent with that of the nonlinear crystal, keeping the voltage of the anode gold-plating surface consistent with that of the anode of an external circuit, and generating deformation along with the nonlinear crystal and the anode gold-plating surface so as to eliminate the stress of the nonlinear crystal;
the heat-conducting and electric-conducting elastic material layer is arranged between the negative gold-plating surface and the metal shell and is used for keeping the temperature of the metal shell consistent with that of the nonlinear crystal, keeping the voltage of the metal shell consistent with that of the negative gold-plating surface and generating deformation along with the nonlinear crystal and the negative gold-plating surface so as to eliminate the stress of the nonlinear crystal;
the thermal expansion coefficient of the heat-conducting and electric-conducting elastic material layer is the same as that of the nonlinear crystal, and the hollow structure is arranged inside the metal shell.
2. A high and low temperature optical modulator according to claim 1, wherein: the heat-conducting insulating elastic material layer adopts a heat-conducting insulating silica gel strip.
3. A high and low temperature optical modulator according to claim 1, wherein: the heat and electricity conducting elastic material layer is made of heat and electricity conducting silica gel strips.
4. A high and low temperature optical modulator according to claim 1, wherein: the nonlinear crystal comprises KDP, DKDP, KTP, RTP, LN, BBO, LBO, CLBO, BIBO, KTA, ADP, lithium iodate crystal and rare earth doped crystal compound thereof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010472304.3A CN111552134B (en) | 2020-05-29 | 2020-05-29 | High-low temperature optical modulator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010472304.3A CN111552134B (en) | 2020-05-29 | 2020-05-29 | High-low temperature optical modulator |
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| Publication Number | Publication Date |
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| CN111552134A CN111552134A (en) | 2020-08-18 |
| CN111552134B true CN111552134B (en) | 2021-05-25 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4968121A (en) * | 1988-12-07 | 1990-11-06 | Hughes Aircraft Company | Hermetically sealed apparatus and method for maintaining crystals at a controlled operating temperature |
| CN101750760A (en) * | 2008-12-17 | 2010-06-23 | 福建福晶科技股份有限公司 | Electro-optical switch with strong turn-off capacity of light |
| CN203674551U (en) * | 2013-12-31 | 2014-06-25 | 济南晶众光电科技有限公司 | Crystal cartridge of laser Q switch |
| CN207250928U (en) * | 2018-01-24 | 2018-04-17 | 济南晶众光电科技有限公司 | A kind of bicrystal Q-switch |
| CN207249314U (en) * | 2018-01-24 | 2018-04-17 | 济南晶众光电科技有限公司 | One kind leads warm type bbo crystal construction of switch |
-
2020
- 2020-05-29 CN CN202010472304.3A patent/CN111552134B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4968121A (en) * | 1988-12-07 | 1990-11-06 | Hughes Aircraft Company | Hermetically sealed apparatus and method for maintaining crystals at a controlled operating temperature |
| CN101750760A (en) * | 2008-12-17 | 2010-06-23 | 福建福晶科技股份有限公司 | Electro-optical switch with strong turn-off capacity of light |
| CN203674551U (en) * | 2013-12-31 | 2014-06-25 | 济南晶众光电科技有限公司 | Crystal cartridge of laser Q switch |
| CN207250928U (en) * | 2018-01-24 | 2018-04-17 | 济南晶众光电科技有限公司 | A kind of bicrystal Q-switch |
| CN207249314U (en) * | 2018-01-24 | 2018-04-17 | 济南晶众光电科技有限公司 | One kind leads warm type bbo crystal construction of switch |
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| Publication number | Publication date |
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| CN111552134A (en) | 2020-08-18 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: A high and low temperature optical modulator Effective date of registration: 20220127 Granted publication date: 20210525 Pledgee: Ji'nan rural commercial bank Limited by Share Ltd. high tech branch Pledgor: JINAN JINGZHONG OPTOELECTRONICS TECHNOLOGY CO.,LTD. Registration number: Y2022980001156 |
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Date of cancellation: 20230111 Granted publication date: 20210525 Pledgee: Ji'nan rural commercial bank Limited by Share Ltd. high tech branch Pledgor: JINAN JINGZHONG OPTOELECTRONICS TECHNOLOGY CO.,LTD. Registration number: Y2022980001156 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: A high and low temperature light modulator Effective date of registration: 20230129 Granted publication date: 20210525 Pledgee: Ji'nan rural commercial bank Limited by Share Ltd. high tech branch Pledgor: JINAN JINGZHONG OPTOELECTRONICS TECHNOLOGY CO.,LTD. Registration number: Y2023980031737 |