阅读说明：本技术 一种提高激光器光功率密度的装置 (Device for improving optical power density of laser ) 是由 于果蕾 王美美 开北超 刘成成 邵慧慧 于 2018-08-23 设计创作，主要内容包括：一种提高激光器光功率密度的装置,包括：底座、N个激光器、快轴准直镜、N个慢轴准直镜、N个转向反射镜、聚焦透镜、光纤以及光路升高调节机构。由于通过光路升高调节机构可以调节升高后的光束的高度,可以方便匹配不同出光宽度的激光器,使其调节到各个光束射入到慢轴准直镜处时在高度上紧密排列,从而确保光束的聚集密度,有效减少了各个光束之间的间距,进而提高了激光器的光束密度。同时由于设置了光路升高调节机构将从慢轴准直镜到快轴准直镜之间的光路进行了纵向上的升高,因此可以压缩慢轴准直镜与快轴准直镜之间的水平距离,从而可以减小激光器的水平尺寸。(An apparatus for increasing optical power density of a laser, comprising: the device comprises a base, N lasers, a fast axis collimating mirror, N slow axis collimating mirrors, N steering reflecting mirrors, a focusing lens, an optical fiber and a light path lifting adjusting mechanism. Because the height of the light beam after rising can be adjusted through the light path rising adjusting mechanism, the laser with different light-emitting widths can be conveniently matched, and the light beams are adjusted to be closely arranged in height when being emitted into the slow axis collimating mirror, so that the concentration density of the light beams is ensured, the space between the light beams is effectively reduced, and the light beam density of the laser is further improved. Meanwhile, the light path between the slow axis collimating mirror and the fast axis collimating mirror is longitudinally lifted by the light path lifting adjusting mechanism, so that the horizontal distance between the slow axis collimating mirror and the fast axis collimating mirror can be compressed, and the horizontal size of the laser can be reduced.)

1. An apparatus for increasing optical power density of a laser, comprising:

the laser comprises a base (1), wherein N lasers (3) are arranged on one side of the upper end face of the base at intervals along the length direction of the base, and N is a positive integer greater than or equal to 2;

the fast axis collimating lens (13) is arranged on a light-emitting path at the front end of the laser (3);

the N slow axis collimating lenses (8) are all arranged on the base (1) and are respectively positioned at the front ends of the fast axis collimating lenses (13);

the N steering reflectors (9) are arranged on the base (1) and are respectively positioned at the front ends of the slow axis collimating mirrors (8);

the focusing lens (11) is arranged on the base (1), and the steering reflector (9) reflects the light collimated by the slow axis collimator lens (8) to the focusing lens (11);

the optical fiber (12) is arranged on the base (1) and is coaxial with the focusing lens (11), and the focusing lens (11) converges the converged light beams into the optical fiber (12); and

the light path lifting adjusting mechanism is arranged between the fast axis collimating mirror (13) and the slow axis collimating mirror (8), the light path lifting adjusting mechanism parallelly lifts horizontal light beams collimated by the fast axis collimating mirror (13) and then emits the light beams into the slow axis collimating mirror (8), the height difference between the light beams after parallel lifting and the light beams emitted after being collimated by the fast axis collimating mirror (13) is adjusted through the light path lifting adjusting mechanism, and the light beams of the N light beams after being lifted by the light path lifting adjusting mechanism are arranged at equal intervals along the longitudinal direction.

2. The apparatus of claim 1, wherein: the light path lifting adjusting mechanism comprises N right-angle reflecting mirrors I (4) arranged at the front ends of the lasers (3) and a right-angle reflecting mirror II (5) arranged on the base (1) and positioned above the right-angle reflecting mirrors I (4), the right-angle reflector I (4) is slidably mounted on the base (1) along the light-emitting light path direction of the laser (3), a 45-degree reflecting surface of the right-angle reflector I (4) and a 45-degree reflecting surface of the right-angle reflector II (5) are oppositely arranged and are parallel to each other, a light beam collimated by the fast-axis collimating mirror (13) is reflected by the 45-degree reflecting surface of the right-angle reflector I (4) and then upwards emitted to the right-angle reflector II (5), and then is reflected by the 45-degree reflecting surface of the right-angle reflector II (5) and then emitted to the slow-axis collimating mirror (8), and the distance between each right-angle reflector I (4) and the corresponding laser (3) from left to right is sequentially increased.

3. The apparatus of claim 1, wherein: the laser device is characterized by further comprising a base plate (2) arranged on the base (1), and each laser (3) is horizontally arranged on the upper surface of the base plate (2).

4. The apparatus of claim 1, wherein: the device also comprises a base platform (7) arranged on the base (1), and each slow axis collimating mirror (8) is arranged on the upper surface of the base platform (7).

5. The apparatus of claim 1, wherein: the focusing lens is characterized by further comprising a support II (10) arranged on the base (1), and the focusing lens (11) is arranged on the support II (10).

6. The apparatus of claim 2, wherein: and two ends of the right-angle reflecting mirror II (5) are respectively fixed on the base (1) through the support I (6).

7. The apparatus of claim 2, wherein: when the light beam collimated by the fast axis collimating mirror (13) is not parallel to the horizontal plane, the included angle of the bottom plane of the right angle reflecting mirror I (4) relative to the base (1) is equal to the included angle between the collimated light beam and the horizontal plane.

Technical Field

The invention relates to the technical field of semiconductor lasers, in particular to a device for improving the optical power density of a laser.

Background

At present, most of the multiple laser beams have the problem that the beam density is not high enough and the beam interval is limited to a large extent by the spacing between the lasers. In addition, the distance between the fast axis collimating lens and the slow axis collimating lens of the laser is too long, which wastes space and results in that the size of the laser cannot be reduced.

In the currently disclosed patent, there is an improvement on the beam density, and in chinese patent document CN201610556274.8, the distance between the laser array beams is specified by using a mirror, so that the beam density of the beams is increased to a certain extent, but at the same time, the laser is bulky, and the distance between the fast axis collimating lens and the slow axis collimating lens is not improved, and besides, no clear method is provided for mounting and fixing the mirror. The lasers mentioned in chinese patent documents CN201610015579.8 and CN201621316378.3 both use a reflector and a wedge prism to integrate the light beams, and because there is an elevation angle between the reflector and the substrate and the wedge prism has to be introduced to further adjust the light beams, the distance between the light beams cannot be accurately and freely determined. In addition, the distance between the fast and slow axis collimating mirrors is not improved.

CN105207054B discloses a multi-single-tube semiconductor laser fiber coupling module, which is to solve the problem that the laser has low light beam density due to different light emission widths, and is that the first stepped heat sink and the second stepped heat sink have four stepped surfaces F respectively, and the four stepped surfaces F are sequentially raised from the middle of the bottom plate to the two ends of the first direction, and the laser is fixed on different step heights, so as to eliminate the difference of light beams caused by different light emission widths of the laser. However, the fixed step height can not be well adapted to lasers with different light emitting widths, the beam density of the laser cannot meet higher requirements, and meanwhile, the stepped heat sink has a large volume and can not reduce the size of the whole device.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides a device for improving the optical power density of the laser, which improves the beam density and reduces the horizontal size of the laser.

The technical scheme adopted by the invention for overcoming the technical problems is as follows:

an apparatus for increasing optical power density of a laser, comprising:

the laser comprises a base, wherein N lasers are arranged on one side of the upper end face of the base at intervals along the length direction of the base, and N is a positive integer greater than or equal to 2;

the fast axis collimating lens is arranged on a light-emitting path at the front end of the laser;

the N slow axis collimating lenses are all arranged on the base and are respectively positioned at the front ends of the fast axis collimating lenses;

the N steering reflectors are arranged on the base and are respectively positioned at the front end of each slow axis collimating mirror;

the focusing lens is arranged on the base, and the steering reflector reflects the light collimated by the slow axis collimating mirror to the focusing lens;

the optical fiber is arranged on the base and is coaxial with the focusing lens, and the focusing lens converges each converged light beam into the optical fiber; and

the light path elevation adjusting mechanism is arranged between the fast axis collimating mirror and the slow axis collimating mirror, the light path elevation adjusting mechanism parallelly elevates horizontal light beams collimated by the fast axis collimating mirror and then emits the light beams into the slow axis collimating mirror, the height difference between the parallel elevated light beams and the light beams emitted after being collimated by the fast axis collimating mirror is adjusted through the light path elevation adjusting mechanism, and the N light beams elevated by the light path elevation adjusting mechanism are arranged at equal intervals along the longitudinal direction.

The light path lifting adjusting mechanism comprises N right-angle reflecting mirrors I arranged at the front ends of the lasers and a right-angle reflecting mirror II arranged on the base and located above the right-angle reflecting mirrors I, the right-angle reflecting mirrors I are slidably mounted on the base along the light emitting light path direction of the lasers, 45-degree reflecting surfaces of the right-angle reflecting mirrors I and 45-degree reflecting surfaces of the right-angle reflecting mirrors II are oppositely arranged and parallel to each other, light beams collimated by the fast-axis collimating mirror upwards irradiate to the right-angle reflecting mirrors II after being reflected by the 45-degree reflecting surfaces of the right-angle reflecting mirrors I, the light beams are reflected by the 45-degree reflecting surfaces of the right-angle reflecting mirrors II to form the slow-axis collimating mirror, and the distance between each right-angle reflecting mirror I and the corresponding lasers from left increases in sequence.

Preferably, the laser device further comprises a substrate arranged on the base, and each laser is horizontally arranged on the upper surface of the substrate.

Preferably, the optical system further comprises a base station arranged on the base, and each slow-axis collimating mirror is arranged on the upper surface of the base station.

Preferably, the focusing lens further comprises a support II arranged on the base, and the focusing lens is arranged on the support II.

Preferably, both ends of the right angle reflecting mirror ii are fixed to the base by the pillars i, respectively.

Preferably, when the light beam collimated by the fast axis collimating mirror is not parallel to the horizontal plane, the included angle of the bottom plane of the right angle reflecting mirror I relative to the base is equal to the included angle between the collimated light beam and the horizontal plane.

The invention has the beneficial effects that: the height of the light beam after rising can be adjusted through the light path rising adjusting mechanism, so that lasers with different light emitting widths can be conveniently matched, the heights of the lasers are adjusted to be approximately consistent when the light beams are tightly arranged in the height direction when entering the slow axis collimating mirror, the concentration density of the light beams is ensured, the space between the light beams is effectively reduced, and the light beam density of the lasers is improved. Meanwhile, the light path between the slow axis collimating mirror and the fast axis collimating mirror is longitudinally lifted by the light path lifting adjusting mechanism, so that the horizontal distance between the slow axis collimating mirror and the fast axis collimating mirror can be compressed, and the horizontal size of the laser can be reduced. .

Drawings

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a schematic view of the structure of the lower mirror and the upper mirror of the present invention;

FIG. 3 is a schematic view of the lower reflector of the present invention after rotation;

in the figure, 1, a base 2, a substrate 3, a laser 4, a right angle reflector I5, a right angle reflector II 6, a support I7, a base 8, a slow axis collimating mirror 9, a steering reflector 10, a support II 11, a focusing lens 12, an optical fiber 13 and a fast axis collimating mirror.

Detailed Description

The invention will be further explained with reference to fig. 1 and 2.

An apparatus for increasing optical power density of a laser, comprising: the laser comprises a base 1, wherein N lasers 3 are arranged on one side of the upper end face of the base at intervals along the length direction of the base, and N is a positive integer greater than or equal to 2; the fast axis collimating lens 13 is arranged on a light-emitting path at the front end of the laser 3; the N slow axis collimating mirrors 8 are arranged on the base 1 and are respectively positioned at the front ends of the fast axis collimating mirrors 13; the N steering reflectors 9 are arranged on the base 1 and are respectively positioned at the front end of each slow axis collimating mirror 8; the focusing lens 11 is arranged on the base 1, and the steering reflector 9 reflects the light collimated by the slow axis collimator lens 8 to the focusing lens 11; the optical fiber 12 is arranged on the base 1 and is coaxial with the focusing lens 11, and the focusing lens 11 converges each converged light beam into the optical fiber 12; and the light path elevation adjusting mechanism is arranged between the fast axis collimating mirror 13 and the slow axis collimating mirror 8, the light path elevation adjusting mechanism parallelly elevates the horizontal light beam collimated by the fast axis collimating mirror 13 and then emits the light beam into the slow axis collimating mirror 8, the height difference between the parallel elevated light beam and the light beam emitted after being collimated by the fast axis collimating mirror 13 is adjusted by the light path elevation adjusting mechanism, and the N light beams elevated by the light path elevation adjusting mechanism are longitudinally arranged at equal intervals. The light emitted by the N lasers 3 during working is collimated by the corresponding fast axis collimating mirrors 13 to become parallel light, the parallel light is heightened by the light path elevation adjusting mechanism in the height direction and then is emitted into the slow axis collimating mirror 8 in the horizontal direction, the parallel light is collimated by the slow axis collimating mirror 8 and then is reflected to the focusing lens 11 by the corresponding steering reflecting mirrors 9, and the focusing lens 11 focuses the light beams reflected by the steering reflecting mirrors 9 and then converges the light beams into the optical fiber 12. Because the height of the light beam after rising can be adjusted through the light path rising adjusting mechanism, the laser 3 with different light-emitting widths can be conveniently matched, and the light beams reflected by the corresponding steering reflecting mirrors 9 are adjusted to be arranged at equal intervals in the height direction, so that the light beams are arranged at the minimum interval, the concentration density is improved, the intervals among the light beams are effectively reduced, and the light beam density of the laser is improved. Meanwhile, the light path between the slow axis collimating mirror 8 and the fast axis collimating mirror 13 is longitudinally lifted by the light path lifting adjusting mechanism, so that the horizontal distance between the slow axis collimating mirror 8 and the fast axis collimating mirror 13 can be compressed, and the horizontal size of the laser can be reduced.