CN104614815A - Fiber coupling type optical module of multi-single-tube semiconductor laser - Google Patents

Abstract

The invention provides a fiber coupling type optical module of a multi-single-tube semiconductor laser, and belongs to the field of optics. The fiber coupling type optical module of the multi-single-tube semiconductor laser comprises eight single-tube semiconductor lasers which are horizontally arranged; a corresponding laser beam deviating optical system is positioned in an optical path of each single-tube semiconductor laser, thus the corresponding single-tube semiconductor laser beam can be correspondingly shifted in the vertical direction and the horizontal direction, and as a result, the beams of a plurality of single-tube semiconductor lasers can be circularly uniformly arranged in the space and combined through a beam combining prism; the combined beam is focused through a fast-and-slow axis focus lamp combination and then enters a coupling lens, and therefore, a fiber coupling lens can be fully utilized.

Description

Multi-single diode laser fiber-coupled optical module

Technical field:

The invention discloses a multi-single-tube semiconductor laser fiber coupling optical system, which belongs to the field of optics.

Background technique:

The current existence of multiple single-tube semiconductor laser fiber coupling has the disadvantage of wasting the aperture space of the coupling mirror. In the past, the beam emitted by the single-tube semiconductor laser enters the coupling mirror to form a one-dimensionally arranged parallel beam, which only takes up the coupling space. A small part in the middle of the optical aperture of the mirror leads to a waste of space for the optical aperture of the coupling mirror. The present invention uses a series of laser beams to offset the optical system to adjust the beams, so that the multi-laser beams arranged in one dimension are changed into two-dimensional circles. The aligned multi-laser beams fully fill the coupling lens, effectively utilizing the aperture space of the coupling lens.

Invention content:

In order to solve the shortcoming of the waste of space in the optical aperture of the coupling mirror in the fiber coupling of multiple single-tube semiconductor lasers, the present invention uses a series of laser beam offset optical systems to adjust the beams, so that the multi-laser beams arranged in one dimension are changed to two dimensions The multiple laser beams arranged in a circle fully fill the coupling lens and effectively utilize the aperture space of the coupling lens.

The basic idea of multi-single-tube semiconductor laser fiber coupling optical system: the laser beams emitted by multiple single-tube semiconductor lasers are arranged in one dimension, and a series of laser beam offset optical systems are used to adjust the beams, so that the multi-laser beams arranged in one dimension, change The multi-laser beams are two-dimensionally arranged in a circle, which fully fills the coupling lens and effectively utilizes the optical aperture space of the coupling lens.

The present invention adopts following technical scheme:

The multi-single-tube semiconductor laser fiber-coupled optical module is characterized in that: 8 single-tube semiconductor lasers are arranged horizontally, and a corresponding laser beam offset optical system is placed in the optical path of each single-tube semiconductor laser, so that the corresponding single-tube semiconductor laser The beam has a corresponding displacement in the vertical and horizontal directions, so that multiple single-tube semiconductor laser beams are uniformly arranged in a circular shape in space, and the beams are combined by the beam combining prism, and then focused by the combination of the fast and slow axis focusing mirrors. Finally, it enters the coupling mirror to make full use of the fiber coupling mirror.

What the present invention provides is a multi-single-tube semiconductor laser fiber coupling optical module, which overcomes the shortcoming of the waste of coupling mirror aperture space in the multi-single-tube semiconductor laser fiber coupling, and realizes full utilization of the coupling mirror aperture, thereby You can use the smallest lens to maximize the power coupled into the fiber, or use the same size lens to couple more single diode lasers.

Description of drawings

Figure 1 is a schematic top view of a single diode laser fiber coupling module.

FIG. 2 is a schematic top view of a reflective prism.

Fig. 3 is a schematic diagram of the arrangement and distribution of multiple single-tube laser beams after passing through a single-tube semiconductor laser fiber coupling optical system.

In the figure: No. 1-9 are reflectors, and No. 10 mirror is beam combiner. a-h are light emitting units/single tubes.

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

Comprehensive description, Figure 1 is a single-tube semiconductor laser fiber-coupled optical module, and Figure 3 is a schematic diagram of the arrangement and distribution of multiple single-tube laser beams after passing through a single-tube semiconductor laser fiber-coupled optical system.

In the scheme, multiple single-tube semiconductor lasers, the corresponding laser beam offset optical system and coupling mirror of each single-tube semiconductor laser are placed on the optical system platform, and after adjustment by multiple laser beam offset systems, the original one The multi-single-tube semiconductor laser beams arranged in two dimensions are arranged in a two-dimensional circle, so as to realize the full utilization of the coupling lens (as shown in Figure 3).

Embodiment one

Referring to Figure 1 and Figure 2, the optical system is designed as the following structure, the mirrors include a total of 8 mirrors No. 1-8, of which No. 1-4 mirrors are flat mirrors, No. 5 and No. The slanted reflectors are wide and can make the light exit angle tilt upward. The No. 7 and 8 reflectors are inclined reflectors that are wide at the top and narrow at the bottom and can make the light exit angle be inclined downward. The No. 9 prism is a reflective prism, and its mirror structure is designed to Part is a flat mirror, and the rest of the upper and lower parts are reflective prisms. The a-d in Figure 1 is collimated by the fast-axis collimator and the slow-axis collimator. Before the beam reaches the beam combiner, it passes through the No. 9 prism middle plane mirror after passing through the No. 1-4 ordinary plane mirror to achieve parallel exit. , forming the arrangement shown in (1) in Figure 3, e and f are collimated through the fast-axis collimator mirror and the slow-axis collimator mirror, and before the beam reaches the beam combiner, it is realized through the No. 5 and No. 6 inclined-plane reflective prisms The light is reflected at an angle, and after being reflected by the No. 9 reflective prism, the arrangement shown in (2) in Figure 3 is formed. G and h are collimated by the fast-axis collimator mirror and the slow-axis collimator mirror. Before the mirror, the angled reflection of light is realized by No. 7 and No. 8 inclined-plane reflective prisms, and after being reflected by No. 9 reflective prisms, the arrangement shown in (3) in Figure 3 is formed; finally, parallel beams arranged in multiple rows are realized (as shown in Figure 3 As shown), the beams are combined by the No. 10 beam combining prism, and the focus is achieved by combining the fast and slow axis focusing mirrors, and finally coupled into the fiber coupling head.

Further, the beam combining prism is a polarization beam combining prism, or a wavelength beam combining prism.

Further, the combination method of the fast-axis and slow-axis focusing mirrors is as follows: the combination of the fast-axis focusing mirror and the slow-axis focusing mirror is selected to realize the separate focusing of the fast-axis and slow-axis directions of the laser beam.

The present invention is described in a progressive manner, and the reflective prism of a single-tube semiconductor laser provided by the present invention has been described in detail above. The above description is only used to help understand the method of the present invention and its core idea; at the same time, for the present invention Those of ordinary skill in the art will have changes in the specific implementation and scope of application according to the idea of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims (6)

1. Multi-single-tube semiconductor laser fiber-coupled optical module, characterized in that: 8 single-tube semiconductor lasers are arranged horizontally, and a corresponding laser beam offset optical system is placed in the optical path of each single-tube semiconductor laser, so that the corresponding single-tube semiconductor laser The semiconductor laser beams have corresponding displacements in the vertical and horizontal directions, so that multiple single-tube semiconductor laser beams are evenly arranged in a circular shape in space, and the beams are combined by the beam combining prism, and then the focusing is achieved by combining the fast and slow axis focusing mirrors. Finally, it enters the coupling mirror to make full use of the fiber coupling mirror. 2. The multi-single-tube semiconductor laser fiber-coupled optical module according to claim 1, wherein the number of single-tube semiconductor lasers is one, or no more than 100. 3. The multi-single-tube semiconductor laser fiber-coupled optical module according to claim 1 is characterized in that: in the optical path of each single-tube semiconductor laser, the corresponding laser beam offset optical system is composed of reflectors, or refractors Composition, or composed of plane prisms, or composed of retroreflective prisms. 4. The multi-single-tube semiconductor laser fiber-coupled optical module according to claim 1, characterized in that: the light beam emitted by the single-tube semiconductor laser is collimated using a fast-axis collimation system and a slow-axis collimation system, or not used, Or use one of these to collimate. 5. The multi-single diode laser fiber coupling optical module according to claim 1, characterized in that: the beam combiner is a polarization beam combiner, or a wavelength beam combiner, or a space beam combiner. 6. The multi-single-tube semiconductor laser fiber-coupled optical module according to claim 1, characterized in that: the focusing mirror is a biconvex mirror, or a convex-concave mirror, or a plano-convex mirror, or a combined cylindrical mirror.