WO2014082348A1

WO2014082348A1 - Miniature laser tube of semiconductor laser pump

Info

Publication number: WO2014082348A1
Application number: PCT/CN2012/086464
Authority: WO
Inventors: 吴彦林
Original assignee: 西安精英光电技术有限公司
Priority date: 2012-11-28
Filing date: 2012-12-12
Publication date: 2014-06-05
Also published as: CN102938533A

Abstract

A miniature laser tube of a semiconductor laser pump comprises a main body base (1), a rectangular column body (2) disposed on the main body base (1), and a binding post (8) connected below the main body base (1). The main body base (1) and the rectangular column body (2) are in integrated mechanical connection. An 808-nm laser pump light source (3) and a YVO4+PPLN laser crystal (4) are successively disposed at the upper portion and the lower portion of the inner side of the rectangular column body (2). A PD light receiver (5) is disposed on the main body base (1). In addition, the miniature laser tube of the semiconductor laser pump comprises a metal protection case (6) sleeved on the main body base (1). According to the miniature laser tube of the semiconductor laser pump, by reducing outline dimensions of a 532-nm laser in the prior art, the miniature laser tube of the semiconductor laser pump has a compact structure and reasonable design, the 532-nm pump laser microminiaturization is successfully implemented, and the reliability and stability of the performance of the laser tube are improved, thereby meeting current demands for this kind of the laser tube on the market.

Description

Semiconductor laser pumped micro laser tube

The invention belongs to the field of optoelectronic technology, and in particular relates to a semiconductor pump micro laser tube integrated with miniaturization of a green light pump laser with a wavelength of 532 nm.

Background technique

Due to its compact structure, small size, relatively simple technology conversion process, and low price, semiconductor laser tubes are widely used in the laser field. They are classified by wavelength, and now the mature laser tubes on the market have purple light (405 nm). Blue light (450 nm); red light and infrared (635 nm to 1310 nm), however, green light (532 nm) is still a large demand in the market demand but the technical bottleneck has not been broken. The more common technical method on the market today is a pump laser that uses a combination of a 808 nm laser tube and a 532 nm multiplier crystal. The existing shortcomings and deficiencies in the implementation of green light are:

1. The technology conversion process is complicated. The existing 532 nm laser implementation technology is realized by a combination of multiple lenses and components. Assembly and debugging between components requires high precision and complicated assembly process. It is difficult to assemble and limits productivity in high-volume production.

2. Large size. A remarkable feature of semiconductor lasers is their small size and convenient application. However, the commonly used implementation methods, due to the large number of components required, have led to an increase in the size of the entire system, which limits its application in smaller spaces. .

3. The realization cost is higher. To achieve a laser with an output wavelength of 532 nm, a laser tube with an output wavelength of 808 nm is first required, and the 808 nm laser tube beam is shaped by an optical lens to be coupled to the pump end face of the frequency doubling crystal. After output, a green light beam of 532 nm is output. The entire system requires multiple component assembly combinations, not only for high material costs, but also due to the complexity of the assembly process. Sexuality also makes its process costly.

4. Reliability is not high. The more intermediate links, the more likely it is to affect the final performance. Due to the process requirements, most of the system is glued to achieve the connection between the parts. Once the lens and crystal are loose, the whole system is in a state of paralysis or scrap.

Summary of the invention

It is an object of the present invention to provide a semiconductor pumped micro laser tube which is compact and more widely used by reducing the external dimensions of a 532 nm laser realized in the prior art; Sexuality improves the reliability and stability of the performance of the laser tube; it satisfies the current market demand for such laser tubes.

The object of the present invention is achieved by the following technical solutions.

A semiconductor pumped micro laser tube comprises a main body base and a rectangular cylinder disposed on the base of the main body, and a binding post connected under the main body base, wherein the main body base and the rectangular cylinder are integrally mechanically connected; the inner side of the rectangular cylinder A 808 nm laser pumping light source and a YV04+PPLN laser crystal are arranged in this order, and a PD light receiver is disposed on the main body base; and a metal protective casing connected to the main body base is further included.

Further, in the laser tube:

The body base is vertically distributed with the rectangular cylinder.

The 808 nm laser pumping light source and the YV04+PPLN laser crystal disposed inside the rectangular cylinder are respectively distributed from bottom to top, and the light emitting point of the 808 nm laser pumping light source is opposite to the pumped upper end surface of the YV04+PPLN laser crystal. .

The 808 nm laser pumping light source is disposed on a surface of the rectangular cylinder and the body base, and the 808 nm laser pumping light source is disposed opposite to the PD light receiver disposed on the body base.

The terminals are respectively connected to a 808 nm laser pumping source, a YV04+PPLN laser crystal, and a PD photoreceiver. The metal protective casing is sleeved on the upper surface of the main body base, and components including the rectangular cylinder, the 808 nm laser pumping light source, the YV04+PPLN laser crystal, and the PD optical receiver are placed therein.

The metal protective casing has a cylindrical cavity structure, and a light-emitting hole for emitting light is disposed at an upper portion of the cavity body, and an upper end surface of the light-emitting hole is an inclined surface, and the inclined glass surface is covered on the inclined surface.

The present invention has the following advantages over the prior art:

1. The invention has the advantages of compact structure, reasonable design, simple assembly and convenient implementation.

2. The invention integrates all the implementation processes of the 532 nanometer (green light) laser, directly realizes the micro laser tube with a wavelength of 532 nm, and greatly reduces the complex and large shape structure of the 532 nm laser. Miniaturization of 532nm pump lasers is achieved.

3. The invention directly uses the YV04+PPLN laser crystal to couple with the near source point of the 808 nm laser pumping source, omitting the shaping of the light source by the lens, thereby simplifying the process and saving cost.

4. The implementation cost of the invention is low, the power consumption of the green laser is reduced, the service life is long, the utility is strong, and the utility model is convenient for popularization and use.

The invention integrates the 808 nm laser pumping light source and the YV04+PPLN laser crystal on the inner surface of the rectangular cylinder, and the light-emitting point of the 808 nm laser pumping light source is opposite to the pumping end surface of the YV04+PPLN laser crystal and is on the same line. The PD optical receiver on the base receives a 532 nm laser from a portion of the YV04+PPLN laser crystal. All devices are integrated in a small space to miniaturize the 532nm pump laser.

The main features of the present invention are: a laser pumped YV04+PPLN laser crystal emitted by 808nm LD emits a 532nm laser, and a mirror reflects a part of the 532nm laser to the PD receiver. The PD receiver gives a signal adjustment according to the strength of the feedback 532nm laser. The size of the pump laser is maintained to maintain the stability of the 532nm laser power. The YV04+PPLN laser crystal can be used to greatly reduce the operating current of the 532nm laser. The invention is a low-power miniature green laser with very practical value and has great market value. DRAWINGS

Figure 1 is an exploded view of the structure of the present invention.

Figure 2 is a schematic view showing the structure of the main body of the present invention.

Figure 3 is a front view of Figure 2.

Figure 4 is a plan view of Figure 2.

Figure 5 is a schematic cross-sectional view showing the assembly of the invention.

Description of the reference signs:

1 - main body base; 2 - rectangular cylinder; 3 - 808nm laser pumping light source;

4—YV04+PPLN laser crystal; 5—PD light receiving tube; 6—metal protective casing;

7—Feedback glass lens 8—Terminal post (pin)

detailed description

The technical solution of the present invention will be further described in detail below through the accompanying drawings and embodiments.

As shown in Fig. 1, the present invention includes a casing portion and a body portion.

As shown in FIG. 2, the main body portion includes a circular body base 1 and a rectangular cylinder 2 placed on the main body base 1, and a terminal 8 (pin) is connected below the main body base 1, wherein: the main body base 1 and the rectangular column The body 2 is an integral mechanical connection, and the main body base 1 is vertically distributed with the rectangular cylinder 2; as shown in FIG. 3, the inner side of the rectangular cylinder 2 is respectively provided with 808 nm laser pumping light source 3 and YV04+ from bottom to top. PPLN laser crystal 4, the light-emitting point of the 808 nm laser pumping light source 3 is opposite to the upper end surface of the YV04+PPLN laser crystal 4; the main body base 1 is provided with a PD light receiver 5 (detection tube); the 808 nm laser pumping light source 3 is set On the rectangular cylinder 2 where the rectangular cylinder 2 is in contact with the main body base 1, the 808 nm laser pumping light source 3 is disposed opposite to the PD light receiver 5 provided on the main body base 1.

The three terminals 8 are in electrical connection with the main body base 1, and the two are connected to the upper part of the main body base 1 through the insulating holes. The binding posts 8 are respectively connected with the 808 nm laser pumping light source 3, YV04+PPLN. The laser crystal 4 is connected to the PD optical receiver 5.

As shown in FIG. 3, in the present embodiment, the rectangular column 2 provided on the upper side of the main body base 1 is connected to the main body base 1 at 90 degrees, and the two are mechanically integrally formed; the inner side of the rectangular cylinder 2 is a flat surface. In order to facilitate the placement of the 808 nm laser pumping light source 3 and the YV04+PPLN laser crystal 4; the other side of the main body base 1 corresponding to the rectangular cylinder 2 is mounted with the PD light receiving tube 5.

As shown in FIG. 3, in the embodiment of the present invention, the 808 nm laser pumping light source 3 is mounted below the inner side of the rectangular cylinder 2, and the YV04+PPLN laser crystal 4 is oppositely mounted on the 808 nm laser pumping light source 3. Above, the light-emitting point of the 808 nm laser pumping light source 3 is opposite to the end receiving surface of the YV04+PPLN laser crystal 4. As shown in FIG. 4, one electrode of the 808 nm laser pumping light source 3 is connected to the main body base 1, and the other electrode is connected to a terminal block above the main body base 1, which are in the same straight line; The other side corresponding to the main body houses the PD light receiving tube 5 and is connected to another terminal that leads to the upper surface of the main body base 1.

As shown in Fig. 5, the outer casing portion includes a metal protective casing 6 attached to the main body base 1. The metal protective casing 6 is sleeved on the upper surface of the main body base 1, and the components including the rectangular cylinder 2, the 808 nm laser pumping light source 3, the YV04+PPLN laser crystal 4, and the PD optical receiver 5 are placed therein.

The metal protective casing 6 is a cylindrical cavity structure. The upper part of the cavity body is provided with an opening with an inclined surface, the opening is a light exiting hole for emitting light, and the feedback glass lens 7 is placed at the optical hole, the metal protective casing The lower end of the 6 is fitted on the upper surface of the main body base 1.

The feedback glass lens 7 is loaded from the front end of the outer casing into the light exit hole of the inclined groove, protects the light exit hole and is sealed, and then covers the upper half of the main body base 1 with the metal protective cover 6, so that the laser beam is from the metal protective casing. 6 The light exit hole of the front stage is emitted, and the reflected laser beam as a sample falls onto the PD light receiving tube 5; the lower end surface of the metal protective case 6 is connected to the upper surface of the main body base 1 and sealed to prevent the main body portion from being damaged. The above is a detailed description of the present invention in conjunction with the specific preferred embodiments. It is not to be understood that the specific embodiments of the present invention are limited thereto, and those skilled in the art to which the present invention pertains, without departing from the scope of the present invention. In the following, a number of simple derivations or substitutions may be made, which should be considered as belonging to the invention as defined by the appended claims.

Claims

Claim

A semiconductor pumped micro laser tube comprising a body base (1) and a rectangular cylinder (2) placed on the body base (1), a terminal (8) connected below the body base (1), The utility model is characterized in that: the main body base (1) and the rectangular cylinder body (2) are an integral mechanical connection; the inner side of the rectangular cylinder body (2) is provided with a 808 nm laser pumping light source (3) and a YV04+PPLN laser crystal (4). The main body base (1) is provided with a PD light receiver (5); and further comprises a metal protective casing (6) attached to the main body base (1).

A semiconductor pumped micro laser tube according to claim 1, wherein: said main body base (1) is vertically distributed with said rectangular cylinder (2).

The semiconductor pumping micro laser tube according to claim 1, wherein: 808 nm laser pumping source (3) and YV04+PPLN laser crystal (4) disposed inside the rectangular cylinder (2) are respectively From bottom to top, the 808nm laser pumping source (3) has a light-emitting point that is opposite to the upper end of the YV04+PPLN laser crystal (4).

The semiconductor pumping micro laser tube according to claim 3, wherein: the 808 nm laser pumping light source (3) is disposed on a surface of the rectangular cylinder (2) and the body base (1), 808 nm The laser pumping light source (3) is placed opposite the PD light receiver (5) provided on the main body base (1).

The semiconductor pumped micro laser tube according to claim 1, wherein: said terminal (8) is respectively coupled with a 808 nm laser pumping source (3), a YV04+PPLN laser crystal (4), and a PD light receiving unit. The device (5) is connected.

The semiconductor pumped micro laser tube according to claim 1, wherein: the metal protective casing (6) is sleeved on an upper surface of the main body base (1), and includes the rectangular cylinder (2), The components inside the 808nm laser pumping source (3), YV04+PPLN laser crystal (4) and PD light receiver (5) are placed inside.

The semiconductor pumped micro laser tube according to claim 1, wherein: said metal

Claims

The protective casing (6) is a cylindrical cavity structure, and an exit hole for emitting light is provided at an upper portion of the cavity body, and an upper end surface of the light exit hole is an inclined surface, and a feedback glass lens (7) is covered on the inclined surface.