CN217213374U - High-efficiency lithium niobate electro-optical modulator electrode - Google Patents
High-efficiency lithium niobate electro-optical modulator electrode Download PDFInfo
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- CN217213374U CN217213374U CN202123279316.3U CN202123279316U CN217213374U CN 217213374 U CN217213374 U CN 217213374U CN 202123279316 U CN202123279316 U CN 202123279316U CN 217213374 U CN217213374 U CN 217213374U
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Abstract
The utility model discloses a high efficiency lithium niobate electro-optic modulator electrode, including the modulator shell, the modulator shell matches and is equipped with first optic fibre and second optic fibre, the fixed two piece that are equipped with of modulator shell both ends symmetry, modulator shell side matches fixed signal of telecommunication input interface and the signal of telecommunication output interface of being equipped with, the inside lithium niobate electro-optic crystal substrate that is fixed of modulator shell, the fixed waveguide that is equipped with of lithium niobate electro-optic crystal substrate upside, lithium niobate electro-optic crystal substrate upside is equipped with the recess that matches with the waveguide, the waveguide matches and is equipped with first electrode and second electrode and third electrode, lithium niobate electro-optic crystal substrate downside is equipped with two cell bodys. The utility model discloses have higher efficiency, simultaneously through the cell body setting of arc hunch form, form the ridge structure, when keeping good speed matching and impedance matching and reduce the loss, effectively reduced the damage of structure.
Description
Technical Field
The utility model relates to a communication equipment technical field especially relates to high efficiency lithium niobate electro-optical modulator electrode.
Background
With the continuous development of services such as 5G, cloud computing, virtual reality, data communication, high-definition video and the like, a core optical network is driven to upgrade to ultra-high speed and ultra-long distance transmission, in the process, a lithium niobate electro-optical modulator serving as a core device is indispensable, the lithium niobate electro-optical modulator is manufactured by utilizing the electro-optical effect of a lithium niobate crystal and combining with an optoelectronic integration process, electronic data can be converted into photon information, the lithium niobate electro-optical modulator is a core element for realizing electro-optical conversion, the electro-optical effect is that when voltage is applied to the electro-optical crystal, the refractive index of the electro-optical crystal changes, and the phase, amplitude, intensity and polarization state of an optical signal are modulated through the change of the optical wave characteristic of the crystal.
In order to improve the efficiency of the lithium niobate electro-optical modulator, a layer of silicon dioxide film needs to be prepared on the surface of the lithium niobate to reduce the effective refractive index of microwave/millimeter wave signals and improve the characteristic impedance, and the introduction of the silicon dioxide film inevitably causes a voltage division effect, increases the driving voltage of the electro-optical modulator, and cannot meet the requirement of high-speed transmission.
As in the Chinese patent: CN208953816U discloses a high-efficiency lithium niobate electro-optical modulator electrode, which also specifically discloses: draw together casing, waveguide, lithium niobate substrate and cell body, one side of casing is fixed with first silica gel and connects, and the inside that first silica gel connects is fixed with first optic fibre, the opposite side of casing is fixed with second silica gel and connects, and the inside that second silica gel connects is fixed with second optic fibre, the input signal of telecommunication connects is installed to one side of casing bottom, and the inside block that the input signal of telecommunication connects has input optical signal to connect, the output signal of telecommunication connects is installed to the opposite side of casing bottom, and the inside block that the output signal of telecommunication connects has output optical signal to connect, the inside of casing is fixed with the lithium niobate substrate.
The utility model discloses a there is following not enough: the shell, the waveguide, the lithium niobate substrate and the groove body are arranged, the groove body is arranged at the top and the bottom, a ridge structure is formed, the requirement of high-speed transmission is met, one of important indexes of the lithium niobate electro-optic modulator is half-wave voltage, the half-wave voltage comprises microwave half-wave voltage and direct-current half-wave voltage, the smaller the half-wave voltage is, the better the half-wave voltage is, the longer the electrode length is, the lower the half-wave voltage is, the corresponding increase of the size of the device can be caused by simply increasing the length of the electrode, the occupied rate of the electrode arranged in the shell is smaller, the space waste is caused, the size of the device is wasted, the half-wave voltage cannot be well reduced in a limited space, and meanwhile, the groove body arranged in the shell is rectangular, so that the thinner lithium niobate substrate structure becomes more fragile, and the damage is easy to occur.
To this end, we propose a high efficiency lithium niobate electro-optic modulator electrode to solve the above problems.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the defects existing in the prior art and providing a high-efficiency lithium niobate electrooptical modulator electrode.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
high efficiency lithium niobate electro-optic modulator electrode, including the modulator shell, the modulator shell is strip rectangle building block shape, modulator shell one end matches and is equipped with first optic fibre, the matching of the modulator shell other end is equipped with second optic fibre, the fixed two piece that are equipped with of modulator shell both ends symmetry, modulator shell side matches and fixedly is equipped with signal of telecommunication input interface and signal of telecommunication output interface, modulator shell inside is fixed with lithium niobate electro-optic crystal substrate, the fixed waveguide that is equipped with of lithium niobate electro-optic crystal substrate upside, lithium niobate electro-optic crystal substrate upside is equipped with the recess that matches with the waveguide, the waveguide matching is equipped with first electrode and second electrode and third electrode, lithium niobate electro-optic crystal substrate downside is equipped with two cell bodys.
Preferably, the first optical fiber is fixedly connected with the modulator shell through a first silica gel joint, and the second optical fiber is fixedly connected with the modulator shell through a second silica gel joint.
Preferably, the two support blocks are parallel to and correspond to the lower side of the modulator shell, and the two support blocks are provided with mounting slot holes.
Preferably, the waveguide is matched with the length of the inner space of the modulator shell, and two ends of the waveguide are provided with Y-shaped branches.
Preferably, the first electrode is located in the middle of the lithium niobate electro-optic crystal substrate, the second electrode and the third electrode are symmetrically arranged on two sides of the first electrode, and the first electrode, the second electrode and the third electrode are matched with the waveguide in length.
Preferably, the two groove bodies are symmetrically arranged, and the cross sections of the two groove bodies are arc-shaped.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model discloses a set the waveguide to be close with the inside length of modulator shell, and set first electrode and second electrode and third electrode to the length matching with the waveguide, compare in current electrode setting, can effectively realize the effective utilization to modulator shell body inner space, realize better reduction half-wave voltage in limited space, simultaneously through setting up the cell body setting on lithium niobate electro-optic crystal substrate, form the ridge structure with lithium niobate electro-optic crystal substrate and waveguide, the cell body becomes the arc hunch form, compare in the rectangle form, when keeping good speed matching and impedance matching and reducing loss, structural strength has effectively been improved, and effectively reduce the damage of lithium niobate electro-optic crystal substrate.
Drawings
Fig. 1 is a schematic structural diagram of an electrode of a high-efficiency lithium niobate electro-optical modulator according to the present invention;
fig. 2 is a schematic diagram of the internal structure of the modulator housing in the electrode of the high-efficiency lithium niobate electro-optic modulator provided by the present invention;
fig. 3 is the schematic diagram of the cross-sectional structure of the lithium niobate electro-optic crystal substrate in the electrode of the high-efficiency lithium niobate electro-optic modulator provided by the utility model.
In the figure: the device comprises a modulator shell 1, a first optical fiber 2, a second optical fiber 3, a support block 4, an electric signal input interface 5, an electric signal output interface 6, a lithium niobate electro-optic crystal substrate 7, a waveguide 8, a groove 9, a first electrode 10, a second electrode 11 and a third electrode 12.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
Referring to fig. 1-3, the high-efficiency lithium niobate electro-optical modulator electrode comprises a modulator housing 1, the modulator housing 1 is in a strip-shaped rectangular block shape, one end of the modulator housing 1 is provided with a first optical fiber 2 in a matching manner, the first optical fiber 2 plays a role of incident light, the other end of the modulator housing 1 is provided with a second optical fiber 3 in a matching manner, the second optical fiber 3 plays a role of modulating light, the first optical fiber 2 is fixedly connected with the modulator housing 1 through a first silica gel joint, the second optical fiber is fixedly connected with the modulator housing 1 through a second silica gel joint, the first silica gel joint and the second silica gel joint play a role of protection, the joint of the first optical fiber 2 and the second optical fiber 3 is prevented from being damaged by bending, two support blocks 4 are symmetrically and fixedly arranged at two ends of the modulator housing 1, the two support blocks 4 are fixedly welded with the modulator housing 1, the two support blocks 4 are both in parallel correspondence with the lower side of the modulator housing 1, the two supporting blocks 4 are respectively provided with an installation slotted hole which can be matched with the existing bolt to realize the fixation of the modulator shell 1;
the side surface of the modulator shell 1 is fixedly provided with an electric signal input interface 5 and an electric signal output interface 6 in a matching manner, a lithium niobate electro-optic crystal substrate 7 is fixed in the modulator shell 1, a waveguide 8 is fixedly arranged on the upper side of the lithium niobate electro-optic crystal substrate 7, the waveguide 8 is matched with the length of the internal space of the modulator shell 1, two ends of the waveguide 8 are respectively provided with a Y-shaped branch, the Y-shaped branches play a role in lifting and splitting light, the splitting ratio is 1:1, the upper side of the lithium niobate electro-optic crystal substrate 7 is provided with a groove matched with the waveguide 8, the waveguide 8 is provided with a first electrode 10, a second electrode 11 and a third electrode 12 in a matching manner, the first electrode 10 is positioned in the middle of the lithium niobate electro-optic crystal substrate 7, the second electrode 11 and the third electrode 12 are symmetrically arranged on two sides of the first electrode 10, and the first electrode 10, the second electrode 11 and the third electrode 12 are matched with the length of the waveguide 8;
two groove bodies 9 are arranged on the lower side of the lithium niobate electro-optic crystal substrate 7, the two groove bodies 9 are symmetrically arranged, the sections of the two groove bodies 9 are arc-shaped arch-shaped, ridge-shaped structures are formed among the groove bodies 9, the lithium niobate electro-optic crystal substrate 7 and the waveguide 8, good speed matching and impedance matching can be kept, conductor loss can be reduced, and the requirement of high-speed transmission is met.
The utility model discloses in, the device's theory of operation as follows:
the first optical fiber 2, the second optical fiber 3, the electric signal input interface 5 and the electric signal output interface 6 are connected with external communication equipment through related connecting wires, the electro-optical effect of the lithium niobate electro-optical crystal substrate 7 is utilized, the first electrode 10, the second electrode 11 and the third electrode 12 are set to be traveling wave parameter levels, by adopting the structure, if the phase speeds of the optical wave and the electric signal are the same, a great bandwidth can be obtained, the impedance matching degree of the traveling wave parameter levels and the load is high, and the first electrode 10, the second electrode 11 and the third electrode 12 have enough length, so that the loss is relatively small, the influence on the bandwidth and half-wave voltage is small, the waveguide 8 obtains good rate matching and impedance matching, the refractive index of the lithium niobate electro-optical crystal substrate 7 is changed, and the modulation on the phase, amplitude, intensity and polarization state of the optical signal is realized through the change of the characteristics of the optical wave, a ridge structure is formed among the groove body 9, the lithium niobate electro-optic crystal substrate 7 and the waveguide 8, so that good speed matching and impedance matching can be kept, the conductor loss can be reduced, and the requirement of high-speed transmission is met.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (6)
1. High efficiency lithium niobate electro-optic modulator electrode, including modulator shell (1), its characterized in that, modulator shell (1) is strip rectangle building block, modulator shell (1) one end matches and is equipped with first optic fibre (2), modulator shell (1) other end matches and is equipped with second optic fibre (3), modulator shell (1) both ends symmetry is fixed and is equipped with two branch piece (4), modulator shell (1) side matches and fixedly is equipped with electric signal input interface (5) and electric signal output interface (6), modulator shell (1) inside is fixed with lithium niobate electro-optic crystal substrate (7), the fixed waveguide (8) that is equipped with of lithium niobate electro-optic crystal substrate (7) upside, lithium niobate electro-optic crystal substrate (7) upside is equipped with the recess that matches with waveguide (8), waveguide (8) match and are equipped with first electrode (10) and second electrode (11) and third electrode (12), two groove bodies (9) are arranged on the lower side of the lithium niobate electro-optic crystal substrate (7).
2. The lithium niobate electro-optical modulator electrode of claim 1, wherein the first optical fiber (2) is fixedly connected with the modulator housing (1) through a first silica gel joint, and the second optical fiber is fixedly connected with the modulator housing (1) through a second silica gel joint.
3. The lithium niobate electro-optical modulator electrode with high efficiency according to claim 1, wherein the two support blocks (4) are parallel to the lower side of the modulator housing (1), and the two support blocks (4) are provided with mounting slots.
4. The lithium niobate electro-optical modulator electrode with high efficiency according to claim 1, characterized in that the waveguide (8) is matched with the length of the space inside the modulator housing (1), and both ends of the waveguide (8) are provided with Y-shaped branches.
5. The lithium niobate electro-optical modulator electrode with high efficiency according to claim 1, wherein the first electrode (10) is located in the middle of the lithium niobate electro-optical crystal substrate (7), the second electrode (11) and the third electrode (12) are symmetrically arranged on two sides of the first electrode (10), and the first electrode (10), the second electrode (11) and the third electrode (12) are matched with the waveguide (8) in length.
6. The electrode of the high-efficiency lithium niobate electro-optical modulator according to claim 1, wherein the two grooves (9) are symmetrically arranged, and the cross section of the two grooves (9) is arc-shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123279316.3U CN217213374U (en) | 2021-12-24 | 2021-12-24 | High-efficiency lithium niobate electro-optical modulator electrode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123279316.3U CN217213374U (en) | 2021-12-24 | 2021-12-24 | High-efficiency lithium niobate electro-optical modulator electrode |
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| Publication Number | Publication Date |
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| CN217213374U true CN217213374U (en) | 2022-08-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202123279316.3U Active CN217213374U (en) | 2021-12-24 | 2021-12-24 | High-efficiency lithium niobate electro-optical modulator electrode |
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2021
- 2021-12-24 CN CN202123279316.3U patent/CN217213374U/en active Active
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