CN211789977U - LN Q-switch of BNC interface - Google Patents

Abstract

The utility model discloses a Q switch is transferred to LN of BNC interface, including the casing, the fixed slot has been laid to the inboard of casing, has laid the LN crystal in the fixed slot, and the both sides fixedly connected with copper billet of LN crystal has insulating wire on the copper billet. The LN Q-switched switch of the BNC interface is simple in design, realizes the electric connection between the LN crystal in the shell made of non-conductive materials and the external BNC electrode, and does not damage the LN crystal; the LN crystal and the copper block are bonded by the conductive silver adhesive, the conductive silver adhesive has the functions of conductivity and fixation, external force cannot be applied to the LN crystal, and the optical uniformity in the LN crystal cannot be damaged; the contact area of the copper block and the side surface of the LN crystal is large, the current conduction is uniform, and the volume of the copper block is large, so that a certain heat dissipation effect is achieved; the insulated conductor led out from the copper block can be subjected to high-temperature welding operation on the insulated conductor, can be welded on any device, and cannot conduct high temperature to the LN crystal to damage the LN crystal.

Description

LN Q-switch of BNC interface

Technical Field

The utility model relates to a laser instrument electro-optical modulation field specifically is a Q switch is transferred to LN of BNC interface.

Background

The lithium niobate crystal is a multifunctional material integrating the performances of piezoelectricity, ferroelectricity, pyroelectricity, nonlinearity, electro-light, photoelastic, photorefractive and the like, has good thermal stability and chemical stability, can grow a large-size crystal by using a pulling method, is easy to process and low in cost, and is a few important functional materials which are durable and can not be broken and applied to new fields. At present, the optical fiber has been widely applied in the aspects of infrared detectors, laser modulators, optical communication modulators, optical switches, optical parametric oscillators, integrated optical elements, high-frequency broadband filters, narrow-band filters, high-frequency high-temperature transducers, micro-acoustic devices, laser frequency multipliers, self-frequency doubling lasers, photorefractive devices (such as high-resolution holographic storage), optical waveguide substrates, optical isolators and the like, and is recognized as one of the main candidate materials of optical silicon in the optoelectronic era.

The LN crystal has a wide application space, and when the LN crystal is used, both side surfaces of the LN crystal must be pressurized to generate a photoelectric effect, thereby realizing a function of switching light. A common way of applying power is to introduce an electrical signal into the crystal by means of SMA. With the use of LN crystals in the optical communication and high frequency fields, the electrical connection mode of the traditional SMA mode cannot meet the design requirements for the convenient connection, signal transmission and detection and other application operations, and needs to be connected with a BNC interface.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a Q switch is transferred to LN of BNC interface to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

an LN Q-switched switch of a BNC interface comprises a shell, wherein a fixed groove is distributed on the inner side of the shell, and an LN crystal is placed in the fixed groove; as a further aspect of the present invention: copper blocks are fixedly connected to two sides of the LN crystal, and insulated wires are welded on the copper blocks; the central position of the upper end face of the shell is provided with a mounting hole, the mounting hole is communicated with the fixing groove, the upper end face of the shell is provided with three assembly holes and three placement holes, the assembly holes are not communicated and are provided with threads, the placement holes are communicated with the fixing groove, the size of the placement holes is larger than that of the assembly holes, and the placement holes and the three assembly holes are uniformly arranged in rectangular four-corner positions; a copper column is arranged in the placing hole, the copper column is in a stepped shaft shape, the upper end of the copper column is flush with the shell, welding points are distributed at the lower part of one side of the copper column, and one end of one insulated wire, which is far away from the copper block, is connected with the welding points; a non-through threaded hole is formed in the center of the upper end of the copper column, and the specification of the threaded hole is the same as that of the assembling hole; the shell is assembled with a BNC electrode through the assembling hole and the threaded hole, the BNC electrode is provided with a BNC electrode anode and a BNC electrode cathode, and one end of the other insulated wire departing from the copper block is connected with the BNC electrode anode.

As a further aspect of the present invention: and the copper block is bonded with the LN crystal by adopting conductive silver adhesive.

As a further aspect of the present invention: the copper block is fixedly connected with the shell through insulating glue.

Compared with the prior art, the beneficial effects of the utility model are that: the LN Q-switched switch of the BNC interface is simple in design, realizes the electric connection between the LN crystal in the shell made of non-conductive materials and the external BNC electrode, and does not damage the LN crystal; the LN crystal and the copper block are bonded by the conductive silver adhesive, the conductive silver adhesive has the functions of conductivity and fixation, external force cannot be applied to the LN crystal, and the optical uniformity in the LN crystal cannot be damaged; the contact area of the copper block and the side surface of the LN crystal is large, the current conduction is uniform, and the volume of the copper block is large, so that a certain heat dissipation effect is achieved; the insulated wire led out from the copper block can be subjected to high-temperature welding operation, can be welded on any device, and cannot conduct high temperature to the LN crystal to damage the LN crystal; the design of copper post plays fixed BNC electrode and the electrically conductive effect of negative pole simultaneously, has solved the problem of inconvenient beading on the BNC electrode negative pole.

Drawings

Fig. 1 is a schematic diagram of an electrical connection structure of an LN Q-switch of a BNC interface.

Fig. 2 is a top view of a housing in the LN Q-switched switch of the BNC interface.

Fig. 3 is a schematic cross-sectional structure view of a copper pillar in the LN Q-switched switch of the BNC interface.

In the figure: 1-shell, 2-assembly hole, 3-mounting hole, 4-placing hole, 5-copper column, 6-threaded hole, 7-welding point, 8-LN crystal, 9-copper block, 10-fixing groove, 11-BNC electrode, 12-BNC electrode anode, 13-BNC electrode cathode and 14-insulated wire.

Detailed Description

In the following description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate the directions or positional relationships based on the directions or positional relationships 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 device or element referred to must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present invention.

Example 1

Referring to fig. 1-3, an LN Q-switch of BNC interface includes a case 1, a fixing groove 10 is disposed on the inner side of the case 1, an LN crystal 8 is disposed in the fixing groove 10, a gold electrode with chromium as a substrate is plated on the side of the LN crystal 8, and the electrode can uniformly conduct current to the side of the LN crystal 8, so as to make the electric field uniform; copper blocks 9 are fixedly connected to two sides of the LN crystal 8, and insulated wires 14 are welded on the copper blocks 9; the central position of the upper end face of the shell 1 is provided with a mounting hole 3, the mounting hole 3 is communicated with a fixing groove 10, the upper end face of the shell 1 is provided with three assembly holes 2 and three placement holes 4, the assembly holes 2 are not communicated and are provided with threads, the placement holes 4 are communicated with the fixing groove 10, the size of the placement holes 4 is larger than that of the assembly holes 2, and the placement holes 4 and the three assembly holes 2 are uniformly arranged in rectangular four-corner positions; a copper column 5 is placed in the placing hole 4, the copper column 5 is in a stepped shaft shape, the upper end of the copper column 5 is flush with the shell 1, a welding point 7 is distributed at the lower part of one side of the copper column 5, and one end, away from the copper block 9, of one insulated wire 14 is connected with the welding point 7; a non-through threaded hole 6 is formed in the center of the upper end of the copper column 5, and the specification of the threaded hole 6 is the same as that of the assembling hole 2; the housing 1 is equipped with a BNC electrode 11 through the assembly hole 2 and the threaded hole 6, the BNC electrode 11 is provided with a BNC electrode anode 12 and a BNC electrode cathode 13, and one end of another insulated wire 14 departing from the copper block 9 is connected with the BNC electrode anode 12.

Further, the copper block 9 is bonded with the LN crystal 8 by conductive silver adhesive; the LN crystal 8 and the copper block 9 are bonded by the conductive silver adhesive, the conductive silver adhesive has the functions of conductivity and fixation, external force can not be applied to the LN crystal 8, the internal optical uniformity of the LN crystal 8 can not be damaged, the contact area of the copper block 9 and the side surface of the LN crystal 8 is large, current conduction is uniform, the copper block is large in size, and a certain heat dissipation effect is achieved.

Further, the copper block 9 is fixedly connected with the shell 1 by adopting insulating glue.

The working principle of the embodiment is as follows:

the side of the LN crystal 8 is plated with a gold electrode taking chromium as a substrate, the electrode can uniformly conduct current to the side of the LN crystal 8, so that an electric field is uniform, a copper block 9 with the volume being multiple times that of the LN crystal is adhered to the two sides of the LN crystal 8 by conductive silver adhesive, an insulated wire 14 is welded on the copper block 9 before adhesion, and the conductive silver adhesive is solidified at room temperature to play a role of conducting and fixing; an insulating adhesive is applied to the copper block 9, and the LN crystal 8 with the copper block 9 adhered thereto is put into the case 1 made of a non-conductive material and fixed to the case 1. The shell 1 is provided with four holes for installing the BNC electrode 11, wherein three holes are assembly holes 2 corresponding to the installation of the BNC electrode 11, the other hole is a placement hole 4 with the diameter being several times larger than that of the wall assembly hole 2, a copper column 5 with a threaded hole 6 in the middle is assembled in the placement hole 4, the copper column 5 is embedded in the shell 1, the top end of the copper column is flush with the shell 1, the bottom end of the copper column 5 is provided with a welding point 7 capable of welding an insulated wire 14, and the insulated wire 14 on a copper block 9 on one side of the LN crystal 8 is connected with the welding point 7; an insulated wire 14 on a copper block 9 on the other side of the LN crystal 8 is welded on a BNC electrode anode 12, so that the LN crystal 8 is electrically connected with the BNC electrode anode 12, three screws for installing the BNC electrode 11 are screwed into the shell 1, the other screw is screwed into a threaded hole 6 in the copper column 5, and the copper column 5 to which the screw hole 6 belongs is connected with the copper block 9 on one side of the LN crystal 8, so that the BNC electrode cathode 13 is electrically connected with the LN crystal 8.

It should be noted that, although the present specification describes embodiments, each embodiment does not include only a single technical solution, and such description of the specification is only for clarity, and those skilled in the art should take the specification as a whole, and the technical solutions in the embodiments may be appropriately combined to form other embodiments understood by those skilled in the art, and the above-mentioned embodiments only express the preferred embodiments of the technical solutions, and the description thereof is more specific and detailed, but should not be construed as limiting the scope of the claims of the technical solutions. It should be noted that, for those skilled in the art, without departing from the concept of the present invention, several modifications, improvements and substitutions can be made, which all fall within the protection scope of the present technical solution. The protection scope of this technical solution patent should be subject to the appended claims.

Claims (3)

1. An LN Q-switched switch of a BNC interface comprises a shell (1), and is characterized in that a fixed groove (10) is distributed on the inner side of the shell (1), and an LN crystal (8) is placed in the fixed groove (10); copper blocks (9) are fixedly connected to two sides of the LN crystal (8), and insulated wires (14) are welded on the copper blocks (9); the mounting hole (3) is formed in the center of the upper end face of the shell (1), the mounting hole (3) is communicated with the fixing groove (10), the assembling hole (2) and the placing hole (4) are formed in the upper end face of the shell (1), the number of the assembling holes (2) is three, the assembling holes (2) are not communicated and are provided with threads, the placing hole (4) is communicated with the fixing groove (10), the size of the placing hole (4) is larger than that of the assembling holes (2), and the placing hole (4) and the three assembling holes (2) are uniformly arranged in rectangular four-corner positions; a copper column (5) is placed in the placing hole (4), the copper column (5) is in a stepped shaft shape, the upper end of the copper column (5) is flush with the shell (1), a welding point (7) is distributed at the lower part of one side of the copper column (5), and one end, away from the copper block (9), of one insulated wire (14) is connected with the welding point (7); a non-through threaded hole (6) is formed in the center of the upper end of the copper column (5), and the specification of the threaded hole (6) is the same as that of the assembling hole (2); the shell (1) is assembled with a BNC electrode (11) through the assembling hole (2) and the threaded hole (6), the BNC electrode (11) is provided with a BNC electrode anode (12) and a BNC electrode cathode (13), and one end of the other insulated wire (14) departing from the copper block (9) is connected with the BNC electrode anode (12).

2. The LN Q-switched switch of a BNC interface, according to claim 1, characterized in that said copper block (9) is glued to the LN crystal (8) with a conductive silver glue.

3. The LN Q-switch of a BNC interface, according to claim 2, wherein said copper block (9) is fixedly connected to the housing (1) by means of an insulating glue.

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