CN210401855U

CN210401855U - Laser device

Info

Publication number: CN210401855U
Application number: CN201921485947.0U
Authority: CN
Inventors: 邓剑钦; 张大鹏; 黄汉凯
Original assignee: ADVANCED FIBER RESOURCES (ZHUHAI) Ltd
Current assignee: ADVANCED FIBER RESOURCES (ZHUHAI) Ltd
Priority date: 2019-09-06
Filing date: 2019-09-06
Publication date: 2020-04-24
Anticipated expiration: 2029-09-06

Abstract

The utility model provides a laser instrument, include that it revolves light piece, second beam splitter and dispersion compensation piece to be provided with collimator, first beam splitter, magnetic rotation light piece, half-wave plate or quartzy along the light path direction, dispersion compensation piece has input end face and output terminal surface, and input end face is towards the second beam splitter, and input end face and output terminal surface are inclined to the light path direction respectively, and input end face is on a parallel with the output terminal surface. Laser and indicating light are all output from the collimator and sequentially pass through the first light splitting part, the magneto-induced optical rotating part, the half-wave plate or the quartz light rotating part, the second light splitting part and the dispersion compensation part along the light path direction, because the dispersion compensation part has different refractive indexes for the laser of invisible light and the indicating light of visible light, the laser and the indicating light have different axes after the output of the second light splitting part, and after the laser and the indicating light pass through the dispersion compensation part, the laser and the indicating light are coaxial again, so that the coaxial output is realized, and the operation precision and the operation quality can be improved.

Description

Laser device

Technical Field

The utility model relates to an optical device field especially relates to a laser instrument.

Background

In the system of fiber laser marking, cutting, welding and the like, because 1064nm laser is invisible light, 650nm visible light red light is commonly used as an indicating light path, thereby realizing positioning operation. The indicating light of the optical fiber laser marking is generally coupled into the optical fiber through WDM of a laser system, and the signal laser and the indicating light are output from a beam expanding lens of an isolator and then focused through a vibrating lens and a field lens. Due to the dispersion of the isolator crystal material, there is generally a misalignment problem between the 650nm indicator red light output from the isolator and the 1064nm laser light; the problem of different focuses exists after the laser marking system focuses. The effect of which the user can not really get the instruction of which to play can not be achieved, and great inconvenience is brought to the use of the user.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an instruction light and laser instrument of laser coaxial output

In order to realize the utility model discloses first purpose, the utility model provides a laser instrument, include and be provided with collimator, first beam splitter, magnetic rotation light spare, half-wave plate, second beam splitter and dispersion compensation spare along the light path direction, the dispersion compensation spare has input end face and output terminal surface, and input end face is towards the second beam splitter, and input end face and output terminal surface are inclined to the light path direction respectively, and the input end face is on a parallel with the output terminal surface.

Further, the dispersion compensation element is made of yttrium vanadate, lithium niobate, magnesium fluoride or quartz crystal.

In a further embodiment, the laser is provided with a diaphragm between the collimator and the first beam splitter.

In a further aspect, the magneto-optic element is a Faraday rotator.

In a further proposal, the first light splitting component and the second light splitting component adopt YOV4 crystals.

According to the scheme, the laser and the indicating light are output from the collimator and sequentially pass through the first light splitting piece, the magnetic rotation piece, the half-wave plate or the quartz rotation piece, the second light splitting piece and the dispersion compensation piece along the light path direction, the laser and the indicating light are not coaxial after the output of the second light splitting piece due to the fact that the dispersion compensation piece has different refractive indexes for the laser of invisible light and the indicating light of visible light, and the laser and the indicating light are coaxial again after passing through the dispersion compensation piece, so that coaxial output is achieved, and operation precision and operation quality can be improved. And the isolation degree is improved by using the devices of the diaphragm, the first rotator and the YOV4 crystal, and the stability of the equipment is improved.

Drawings

Fig. 1 is an optical diagram of an embodiment of the laser of the present invention.

The present invention will be further explained with reference to the drawings and examples.

Detailed Description

Referring to fig. 1, the laser includes a collimator 11, a diaphragm 12, a first beam splitter 13, a magneto-optical rotator 14, a half-wave plate or quartz rotator 15, a second beam splitter 16 and a dispersion compensator 17 arranged along the optical path direction, the magneto-optical rotator 14 is a faraday rotator, the first beam splitter 13 and the second beam splitter 16 are YOV4 crystals, and the first beam splitter 13, the magneto-optical rotator 14, the half-wave plate 15 and the second beam splitter 16 constitute an isolator. Of course, the half-wave plate can be used instead of the quartz optical rotation member.

The dispersion compensation member 17 is made of yttrium vanadate, lithium lithiate, magnesium fluoride, quartz crystal, or the like, so that the dispersion compensation member 17 has different refractive indexes for light of different wavelengths, and the dispersion compensation member 17 is arranged in a cylindrical or square shape having an inclined incident surface, and is provided with an input end surface 171 and an output end surface 172 at both ends in the axial direction, respectively, the input end surface 171 is parallel to the output end surface 172, the input end surface 171 and the output end surface 172 are inclined to the optical path direction, respectively, and the input end surface 171 faces the second light splitting member 16.

When a laser is used for operation, an indicating light L2 and a laser light L1 need to be output, an indicating light L2 such as 650nm red light passes through a device of the isolator, due to dispersion of crystal materials of the isolator, a problem of different axes generally exists between 650nm indicating light L1 and 1064nm laser light L2 output from the isolator, such as an output state of the second light splitting element 16, and then after the indicating light L2 and the laser light L1 pass through the dispersion compensation element 17, an optical path of light with different wavelengths is adjusted through the dispersion compensation element 17, so that the indicating light L2 and the laser light L1 are coaxially output at the output end face 17.

From top to bottom, laser and pilot light are all exported from the collimater, all pass through first beam splitter in proper order along the light path direction, revolve light spare, half-wave plate, second beam splitter and dispersion compensation piece, because dispersion compensation piece has different refracting indexes to the laser of invisible light and the pilot light of visible light, there is the disalignment at second beam splitter output back laser and pilot light, and laser and pilot light are behind the dispersion compensation piece, laser and pilot light are coaxial again, realize coaxial output then, can improve operation precision and operation quality. And the isolation degree is improved by using the devices of the diaphragm, the first rotator and the YOV4 crystal, and the stability of the equipment is improved.

Claims

1. The laser is characterized by comprising a collimator, a first light splitting piece, a magneto-optical rotation piece, a half-wave plate, a second light splitting piece and a dispersion compensation piece, wherein the collimator, the first light splitting piece, the magneto-optical rotation piece, the half-wave plate, the second light splitting piece and the dispersion compensation piece are arranged along the direction of an optical path, the dispersion compensation piece is provided with an input end face and an output end face, the input end face faces the second light splitting piece, the input end face and the output end face are respectively inclined to the direction of the optical path, and the.

2. The laser of claim 1, wherein:

the dispersion compensation part is made of yttrium vanadate, lithium niobate, magnesium fluoride or quartz crystal.

3. The laser of claim 1, wherein:

the laser is provided with a diaphragm between the collimator and the first light splitting part.

4. The laser according to any one of claims 1 to 3, wherein:

the optical rotating part adopts a Faraday rotator.

5. The laser according to any one of claims 1 to 3, wherein:

the first light splitting component and the second light splitting component adopt YOV4 crystals.