CN215870204U

CN215870204U - Laser medium material module for eye-safe laser

Info

Publication number: CN215870204U
Application number: CN202121387388.7U
Authority: CN
Inventors: 王旭成; 王松华; 周瑾; 杨清艳
Original assignee: Suzhou Zhongke Ultrafast Photoelectric Technology Co ltd
Current assignee: Nanjing Guangbao Optoelectronics Technology Co ltd
Priority date: 2021-06-22
Filing date: 2021-06-22
Publication date: 2022-02-18
Anticipated expiration: 2031-06-22

Abstract

The utility model discloses a laser medium material module for a human eye safety laser, which comprises an upper cover, a right cover, a lower cover, a left cover, a laser medium and a Q-switching crystal, wherein the upper cover, the right cover, the lower cover and the left cover enclose a hollow cube with two open ends, the laser medium and the Q-switching crystal are coaxially arranged in the hollow cube at intervals, the inner walls of the laser medium, the Q-switching crystal and the hollow cube are in bonding fit through a heat conducting glue, and the laser medium is positioned from the side surface of the open end of the hollow cube to the side surface of the Q-switching crystal positioned at the open end of the hollow cube to form a laser resonant cavity. The laser medium material module for the eye-safe laser has the advantages of more stable performance, simplified process, convenience in installation and debugging and higher product yield.

Description

Laser medium material module for eye-safe laser

Technical Field

The utility model relates to the technical field of laser medium materials, in particular to a laser medium material module for a laser safe to human eyes.

Background

In the laser medium material of the existing eye-safe laser, erbium glass and cobalt spinel in the product are generally independently assembled and debugged, and the mode has the problem of overlarge product volume. In order to avoid this problem, the prior art has a mode of firmly combining erbium glass and cobalt spinel by means of bonding to form a module, but the bonding technology has a yield limit, so that the yield of the product itself is low.

SUMMERY OF THE UTILITY MODEL

The application aims to provide a laser medium material module for an eye-safe laser, which improves the yield of products.

For realizing above-mentioned purpose, the application provides a laser medium material module for people's eye safety laser instrument, including upper cover, right side lid, lower cover, left side lid, laser medium, transfer Q crystal, the upper cover the right side lid the lower cover left side lid encloses to construct and is both ends open-ended hollow cube, laser medium transfer Q crystal coaxial and interval set up in this hollow cube, laser medium transfer Q crystal with hollow cube's inner wall bonds the cooperation through the heat conduction glue, laser medium be located this hollow cube open end the side extremely transfer Q crystal be located this hollow cube open end's side and constitute the laser instrument resonant cavity.

Preferably, a signal light high reflection film layer and a pump light antireflection film layer are arranged on the side face of the laser medium at the open end of the hollow cube, and a signal light antireflection film layer is arranged on the side face of the laser medium opposite to the side face of the laser medium at the open end of the hollow cube.

Preferably, the signal light high reflection film layer has a signal light reflectivity P₁＞99％。

Preferably, the signal light reflectivity P of the signal light antireflection film layer₂＜1％。

Preferably, the pump light reflectivity P of the pump light antireflection film layer₃＜1％。

Preferably, a signal light antireflection film layer is arranged on the side surface of the Q-switched crystal at the open end of the hollow cube, and a signal light partial reflection film layer is arranged on the side surface of the Q-switched crystal opposite to the side surface of the Q-switched crystal at the open end of the hollow cube.

Preferably, the signal light partial reflection film layer has a signal light reflectance of 30% < P₄＜99％。

Preferably, the laser medium is a bonded crystal block of white glass and erbium glass or erbium glass.

Has the advantages that: the laser medium material module for the eye-safe laser avoids the use of a bonding technology and improves the yield of products. The transmission efficiency of the pump light is controlled on the light transmission surface of the laser medium through the pump light anti-reflection film layer, and the light transmission loss and the laser resonant cavity loss are reduced. Meanwhile, the laser medium and the Q-switched crystal are bonded with the upper cover, the right cover, the lower cover and the left cover through heat-conducting glue, so that the heat dissipation performance of the product is improved.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic structural diagram of a laser medium material module for an eye-safe laser in example 1 after being disassembled;

FIG. 2 is a schematic structural diagram of a laser medium according to example 2;

fig. 3 is a schematic structural diagram of a Q-switched crystal in example 3.

Reference numerals: 110. an upper cover; 120. a right cover; 130. a lower cover; 140. a left cover; 150. a laser medium; 160. and (5) Q-switched crystals.

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.

Example (b): referring to fig. 1, a laser medium material module for an eye-safe laser includes an upper cover 110, a right cover 120, a lower cover 130, a left cover 140, a laser medium 150, and a Q-switched crystal 160. The upper cover 110, the right cover 120, the lower cover 130, and the left cover 140 may be a flat plate material with good heat dissipation capability and certain hardness in the prior art, and are used for fixing the laser medium 150 and the Q-switched crystal 160, and generally, the upper cover 110, the right cover 120, the lower cover 130, and the left cover 140 may be, but not limited to, a silicon wafer, a silicon carbide wafer, an aluminum nitride wafer, a metal wafer, a diamond wafer, and the like. The upper cover 110, the right cover 120, the lower cover 130 and the left cover 140 form a hollow cube with two open ends, and the laser medium 150 and the Q-switched crystal 160 are coaxially and alternately arranged in the hollow cube. In this embodiment, the laser medium 150 and the Q-switched crystal 160 are bonded to the inner wall of the hollow cube by a thermal conductive adhesive, which may be, but is not limited to, silver paste. The advantage that sets up like this is, adopts upper cover 110, right side lid 120, lower cover 130, the left lid 140 that possesses good heat-sinking capability to and adopt heat-conducting glue to bond laser medium 150, transfer Q crystal 160, on the one hand, has avoided adopting the problem of the fixed laser medium of bonding technique 150, the yield that transfers Q crystal 160 to bring among the traditional art, improves the product yield, and on the other hand has improved the heat-sinking capability of product.

The laser medium 150 is located on the side of the open end of the hollow cube to the side of the Q-switched crystal 160 at the open end of the hollow cube to form the laser cavity. The laser medium 150 is a laser medium material with two plated films at two ends, and generally, adopts erbium (Er3+), ytterbium (Yb3+) ion-doped phosphate glass, which mainly realizes population inversion, and english is abbreviated as: (Er3+, Yb3+: Glass), Chinese is abbreviated as: erbium glass. In some other possible embodiments of the present embodiment, the laser medium 150 may also be a bonded crystal block of white glass and erbium glass, or the like. The Q-switched crystal 160 is a laser medium material with two plated films, and is generally cobalt (Co) doped²⁺) The spinel material of ion mainly realizes the function of passively adjusting Q. The English chemical formula is: (Co: MgAl2O4), abbreviated as: (Co: Spinel), which is abbreviated as cobalt Spinel in Chinese, is also called passive Q-switched crystal or Q-switched crystal.

A signal light high reflection film layer and a pumping light antireflection film layer are arranged on the side surface of the laser medium 150 at the open end of the hollow cube (i.e., the S1 surface in fig. 2), and a signal light antireflection film layer is arranged on the side surface of the laser medium 150 opposite to the side surface of the laser medium 150 at the open end of the hollow cube (i.e., the S2 surface in fig. 2). A signal light antireflection film layer is disposed on the side surface of the Q-switched crystal 160 (i.e., the S3 surface in fig. 3) at the open end of the hollow cube, and a signal light partial reflection film layer is disposed on the side surface of the Q-switched crystal 160 (i.e., the S4 surface in fig. 3) opposite to the side surface of the Q-switched crystal 160 at the open end of the hollow cube. In the embodiment, the signal light high-reflection film layer is a signal light high-reflection film coated on the side surface of the laser medium 150 by a coating method in the prior art, and has a high reflectivity capability to the signal light, i.e., a signal light reflectivity P₁Is more than 99 percent. The signal light anti-reflection film layer is a signal light anti-reflection film coated on the side surfaces of the laser medium 150 and the Q-switched crystal 160 in a coating mode in the prior art, and has the capacity of anti-reflection of signal light and the signal light reflectivity P₂Is less than 1%. The pump light anti-reflection film layer is plated in the prior art in a film plating wayThe pump light antireflection film on the side surface of the laser medium 150 has the capacity of increasing the reflection of the pump light and the reflectivity P of the pump light₃Is less than 1%. The signal light partial reflection film layer is a signal light partial reflection film plated on the side surface of the Q-switched crystal 160 in a film coating mode in the prior art, and has a certain reflectivity capacity for signal light, the reflectivity difference is large according to specific applications, and generally, the reflectivity of the signal light is more than 30% and less than P₄＜99％。

The laser medium material module for the eye-safe laser is more stable in performance, simplified in process and convenient to install and debug. The product is obtained by cutting and bonding, and the method is simple and is more beneficial to batch production. The product volume and the light-transmitting size are small, and the cost is saved. Meanwhile, the bonding material and the heat-conducting glue are used, so that the heat dissipation performance of the product is improved.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the utility model.

Claims

1. The laser medium material module for the eye-safe laser is characterized by comprising an upper cover (110), a right cover (120), a lower cover (130), a left cover (140), a laser medium (150) and a Q-switching crystal (160), wherein the upper cover (110), the right cover (120), the lower cover (130) and the left cover (140) form a hollow cube with two open ends in a surrounding manner, the laser medium (150) and the Q-switching crystal (160) are coaxially arranged in the hollow cube at intervals, the laser medium (150), the Q-switching crystal (160) and the inner wall of the hollow cube are in bonding fit through heat conducting glue, and the laser medium (150) is located from the side face of the open end of the hollow cube to the side face of the Q-switching crystal (160) located at the open end of the hollow cube to form a laser resonant cavity.

2. The laser medium material module for the eye-safe laser device of claim 1, wherein the side of the laser medium (150) at the open end of the hollow cube is provided with a signal light high reflection film layer and a pump light anti-reflection film layer, and the side of the laser medium (150) opposite to the side of the laser medium (150) at the open end of the hollow cube is provided with a signal light anti-reflection film layer.

3. The laser medium material module for an eye-safe laser as claimed in claim 2, wherein the signal light reflectivity P of the signal light high reflection film layer₁>99％。

4. The laser medium material module for an eye-safe laser as claimed in claim 2, wherein the signal light reflectivity P of the signal light antireflection film layer₂<1％。

5. The laser medium material module for an eye-safe laser as claimed in claim 2, wherein the pump light reflectivity P of the pump light antireflection film layer₃<1％。

6. The laser medium material module for the eye-safe laser device of claim 1, wherein the side of the Q-switched crystal (160) at the open end of the hollow cube is provided with a signal light antireflection film layer, and the side of the Q-switched crystal (160) opposite to the side of the Q-switched crystal (160) at the open end of the hollow cube is provided with a signal light partial reflection film layer.

7. The laser medium material module for an eye-safe laser as claimed in claim 6, wherein the signal light reflectivity P of the signal light antireflection film layer₂<1％。

8. The laser medium material module for an eye-safe laser as claimed in claim 6, wherein the signal light reflectivity of the signal light partial reflection film layer is 30%<P₄<99％。

9. Laser medium material module for an eye-safe laser according to claim 1, characterized in that the laser medium (150) is a bonded crystal block of white glass and erbium glass or erbium glass.