TW201917430A - Light source apparatus having high output power - Google Patents

Abstract

A high-power light source device having a compact structure which efficiently combines laser beams emitted from a plurality of laser light sources is provided. The high-power light source device includes: a first row of laser light sources and a second row of laser light sources arranged to face each other; a third row of reflective mirrors arranged outside the second row of laser light sources; a fourth row of reflective mirrors arranged outside the first row of laser light sources; and a beam combiner. The first row of laser light sources and the second row of laser light sources are staggered, the first row of laser light sources are arranged to have a step difference with each other, and the second row of laser light sources are arranged to have a step difference with each other.

Description

Light source device with high output power

BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a high output light source device, and more particularly to a high output light source device having a streamlined configuration by efficiently coupling laser beams emitted from a plurality of laser light sources.

A laser source such as a laser diode has the advantage of being coupable to an optical fiber to easily and efficiently transmit a laser beam to a desired location, and thus is utilized, for example, in laser welding, lightning. Various application fields such as laser soldering or laser pumping source.

There is a limit to the output of a laser beam emitted from a laser diode, and therefore a light source device incorporating a plurality of laser diodes is generally used. In this case, there is a need for a high output light source device that improves the coupling efficiency of the laser beam to the optical fiber and has a streamlined configuration in space.

An embodiment of the present invention provides a high output light source device having a streamlined configuration by efficiently coupling laser light emitted from a plurality of laser light sources.

According to one aspect of the present invention, a light source device includes: a laser light source of a first row and a laser light source of a second row, which are disposed opposite to each other; and a mirror of the third row is reflected from the first The laser beam emitted by the row of laser light sources is disposed outside the laser light source of the second row; the mirror of the fourth row is reflected by the laser beam emitted from the laser light source of the second row, and is disposed above An outer side of the laser light source of the first row; and a beam combiner coupling the laser beam reflected by the mirror of the third row to the laser beam reflected by the mirror of the fourth row; The laser light sources of the first row are alternately arranged with the laser light sources of the second row, and the laser light sources of the first row are arranged with a step difference therebetween, and the laser light sources of the second row have a step difference with each other. Way to set.

A pair of laser light sources of the above-described first row adjacent to each other and the laser light source of the second row described above may be disposed on a plane of the same height. The pair of laser light sources of the first row adjacent to each other and the laser light sources of the second row described above can be provided with a step difference from each other.

Fast Axis Collimating can be provided between the laser source of the first row and the mirror of the third row, and between the laser source of the second row and the mirror of the fourth row. FAC) lens.

A Slow Axis Collimating (SAC) lens may be disposed between the mirror of the third row and the FAC lens, and between the mirror of the fourth row and the FAC lens.

The beam coupler may include a polarization beam combiner, and a polarization converter is disposed between the mirror of the third row and the beam coupler.

The beam coupler may include a wavelength beam combiner, and a first wavelength selecting element is disposed between the mirror of the third row and the beam coupler, and the mirror of the fourth row is coupled to the beam A second wavelength selection element is provided between the devices.

The light source device may further include a coupling lens that couples the laser beam coupled by the beam coupler to the optical fiber.

In another aspect, a light source device includes: a laser source of a first row and a laser source of a second row disposed opposite to each other; and a mirror of the third row reflected from the first row The laser beam emitted from the laser light source is disposed outside the laser light source in the second row; the mirror in the fourth row is reflected from the laser beam emitted from the laser light source in the second row, and is arranged to the first An outer side of the row of laser light sources; and a polarizing beam coupler that couples the laser beam reflected by the mirror of the third row to the laser beam reflected by the mirror of the fourth row; and the thunder of the first row The light source is arranged alternately with the laser light sources of the second row, and the laser light sources of the first row are provided with a step difference therebetween, and the laser light sources of the second row are provided with a step difference therebetween.

The laser beam emitted from the laser light source of the first row and the laser beam emitted from the laser light source of the second row may have the same polarization direction.

The laser beam emitted from the laser light source of the first row and the laser beam emitted from the laser light source of the second row may have different polarization directions.

In still another aspect, a light source device includes: a laser source of a first row and a laser source of a second row disposed opposite to each other; and a mirror of the third row reflected from the first row The laser beam emitted from the laser light source is disposed outside the laser light source in the second row; the mirror in the fourth row is reflected from the laser beam emitted from the laser light source in the second row, and is arranged to the first a laser beam coupler, and a wavelength beam coupler that couples the laser beam reflected by the mirror of the third row to the laser beam reflected by the mirror of the fourth row; and the Ray of the first row The light source is arranged alternately with the laser light sources of the second row, and the laser light sources of the first row are provided with a step difference therebetween, and the laser light sources of the second row are provided with a step difference therebetween.

The laser beam emitted from the laser light source of the first row described above and the laser beam emitted from the laser light source of the second row described above may have the same wavelength range.

A first wavelength selecting element may be disposed between the mirror of the third row and the beam coupler, and a second wavelength selecting element may be provided between the mirror of the fourth row and the beam coupler. The first wavelength selection element and the second wavelength selection element may include a Volume Bragg Grating (VBG).

According to an exemplary embodiment of the present invention, a high-efficiency and high-output light source device that minimizes optical loss by spatially coupling and polarization-coupled laser beams emitted from a laser source can be realized. Further, the laser light source is arranged alternately with each other, and the mirror is disposed outside the laser light source, whereby a light source device having a more simplified structure can be produced. Alternatively, a laser beam having a different wavelength range can be coupled to couple to the fiber.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments exemplified below are provided to illustrate the invention to those skilled in the art, and do not limit the scope of the invention. In the drawings, the same reference numerals are given to the same components, and the size or thickness of each component can be exaggerated for the sake of clarity. In addition, when it is stated that a specific substance layer exists on a substrate or another layer, the substance layer may exist directly in contact with a substrate or another layer, or another third may exist between the substance layer and the substrate or other layer. Floor. Further, in the following examples, the substances constituting each layer are exemplified, and therefore other substances may be used in addition to the above.

Fig. 1 is a plan view showing a light source device according to an exemplary embodiment of the present invention. 2 is a side view of the light source device shown in FIG. 1.

Referring to FIGS. 1 and 2, the light source device 100 includes a laser light source, a mirror, and a beam combiner disposed on the substrate 101. The laser source can be configured in 2 rows. Specifically, the laser light source may include the laser light source 110 of the first row and the laser light source 120 of the second row which are disposed opposite to each other and opposed to each other. The laser light source 110 of the first row may include a first laser light source 111, a second laser light source 112, and a third laser light source 113. The laser light source 120 of the second row may include a fourth laser light source 121, and a fifth The laser light source 122 and the sixth laser light source 123. Here, the laser light source 110 of the first row and the laser light source 120 of the second row may be alternately arranged with each other. In other words, the first laser light source 111, the second laser light source 112, and the third laser light source 113 can be alternately arranged with the fourth laser light source 121, the fifth laser light source 122, and the sixth laser light source 123.

In the accompanying drawings, the case where the laser light source 110 of the first row and the laser light source 120 of the second row respectively include three laser light sources is exemplarily shown. However, the above situation is merely an example, and in addition to this, various numbers of laser light sources may be provided.

Fig. 3 is a perspective view showing a laser light source applicable to the light source device shown in Fig. 1. The laser light source 115 shown in Fig. 3 is the same as the first laser light source to the sixth laser light source 111, 112, 113, 121, 122, and 123 shown in Fig. 1 .

Referring to FIG. 3, the laser light source 115 may include a sub-mount substrate 115a and a laser diode 115b bonded to the sub-mount substrate 115a. The laser diode 115b is used as a source of a laser beam and can be fabricated in the form of a semiconductor wafer. Such a laser diode 115b can be bonded to a metal layer (not shown) of the sub-mount substrate 115a by solder (not shown). The submount substrate 111a may include, for example, a material having excellent thermal conductivity such as AlN or BeO.

4a is a plan view of the laser light source shown in FIG. 3, FIG. 4b is a front view of the laser light source shown in FIG. 3, and FIG. 4c is a side view of the laser light source shown in FIG. The case where the laser beam L emitted from the laser diode 115b is diverged is shown in Figs. 4a and 4c.

4a to 4c, the laser beam L emitted from the laser diode 115b can be diverged in the horizontal direction (D1 direction) and the vertical direction (D2 direction). Here, the angle at which the laser beam L diverges changes depending on the direction. Specifically, the angle θ1 at which the laser beam L diverges in the horizontal direction (D1 direction) is different from the angle θ2 that diverges in the vertical direction (D2 direction).

The light beam diverging in the horizontal direction (D1 direction) from the laser beam L emitted from the laser diode 115b has a multi-mode in space, and the divergence angle θ1 is approximately 8° to 12°. Relatively small. Further, the light beam diverging in the vertical direction (D2 direction) among the laser beams L emitted from the laser diode 115b has a single-mode in space, and the divergence angle θ2 is approximately 28° to 35°. It is relatively large from left to right. Generally, the vertical direction (D2 direction) is referred to as a fast axis direction, and the horizontal direction (D1 direction) is referred to as a slow axis direction. As described above, since the divergence angle of the laser beam L emitted from the laser diode 115b differs depending on the direction, in order to make the laser beam L emitted from the laser diode 115b into parallel light, it is necessary to be accurate in each direction. Straight lens.

In order to make the light beams diverging in the vertical direction (D2 direction), that is, in the high-speed axis direction, a collimator lens having a relatively short focal length in the high-speed axial direction, that is, a FAC (Fast Axis Collimating) lens is required, in order to make it in the horizontal direction (D1) The direction, that is, the beam diverging in the direction of the low speed axis becomes parallel, and a collimator lens having a relatively long focal length in the low speed axis direction, that is, a SAC (Slow Axis Collimating) lens is required. Thereby, the laser beam L emitted from the laser diode 115b can have a cross section of an elliptical shape that is long in the direction of the low speed axis by the FAC lens and the SAC lens.

Referring again to FIGS. 1 and 2, the first laser light source 111, the second laser light source 112, and the third laser light source 113 emit the first laser beam L1, the second laser beam L2, and the third laser beam L3. The fourth laser light source 121, the fifth laser light source 122, and the sixth laser light source 123 emit the fourth laser beam L4, the fifth laser beam L5, and the sixth laser beam L6. Here, the first to sixth laser beams L1 to L6 may have the same polarization direction, for example, the first polarization direction.

The first laser light source 111, the second laser light source 112, and the third laser light source 113 constituting the laser light source 110 of the first row, and the fourth laser light source 121 and the fifth laser light source 120 constituting the second row The laser light source 122 and the sixth laser light source 123 are alternately arranged. Thereby, the first laser beam L1 passes between the fourth laser light source 121 and the fifth laser light source 122, and the second laser beam L2 passes between the fifth laser light source 122 and the sixth laser light source 123. Further, the fourth laser beam L4 passes between the first laser light source 111 and the second laser light source 112, and the fifth laser beam L5 passes between the second laser light source 112 and the third laser light source 113.

In the present embodiment, the first laser light source 111, the second laser light source 112, and the third laser light source 113 constituting the laser light source 110 of the first row are disposed so as to have a step of a specific size h so as to be 1 The laser beam L1, the second laser beam L2, and the third laser beam L3 do not interfere. Further, the fourth laser light source 121, the fifth laser light source 122, and the sixth laser light source 123 constituting the laser light source 120 of the second row are disposed so as to have a step of a specific size h so that the fourth laser beam is provided. L4, the fifth laser beam L5, and the sixth laser beam L6 do not interfere. Further, the laser light source 110 of the adjacent first row and the laser light source 120 of the second row are disposed on a plane of the same height.

Specifically, referring to FIG. 2, the substrate 101 may include a first surface S1, a second surface S2, and a third surface S3 which are sequentially disposed according to a step of a specific size h. Here, the first surface S1 has the highest height. The third surface S3 has the lowest height. The first laser light source 111, the second laser light source 112, and the third laser light source 113 constituting the laser light source 110 of the first row can be respectively provided to the first surface S1, the second surface S2, and the third surface of the substrate 101. S3. Further, the fourth laser light source 121, the fifth laser light source 122, and the sixth laser light source 123 constituting the laser light source 120 of the second row can be provided to the first surface S1 and the second surface S2 of the substrate 101, respectively. 3 sides S3. Therefore, the first laser light source 111 and the fourth laser light source 121 adjacent to each other can be provided to the first surface S1, and the second laser light source 112 and the fifth laser light source 122 adjacent to each other are provided to the second surface S2, and The third laser light source 113 and the sixth laser light source 123 adjacent to each other are provided to the third surface S3.

The mirror can be configured in 2 rows. Specifically, the mirror may include a mirror 170 arranged in the third row outside the laser light source 120 in the second row, and a mirror 180 in the fourth row disposed outside the laser light source 110 in the first row. . Here, the mirror 170 of the third row may include the first mirror 171, the second mirror 172, and the third mirror that reflect the first laser beam L1, the second laser beam L2, and the third laser beam L3. 173. The first mirror 171, the second mirror 172, and the third mirror 173 can be provided to the first surface S1, the second surface S2, and the third surface S3 of the substrate 101, respectively. The mirror 180 of the fourth row may include a fourth mirror 181, a fifth mirror 182, and a sixth mirror 183 that reflect the fourth laser beam L4, the fifth laser beam L5, and the sixth laser beam L6. The fourth mirror 181, the fifth mirror 182, and the sixth mirror 183 can be provided to the first surface S1, the second surface S2, and the third surface S3 of the substrate 101, respectively.

The first FAC lens 131 and the first SAC lens 151 are provided between the first laser light source 111 and the first mirror 171. The first FAC lens 131 functions to parallelize the first laser beam L1 emitted from the first laser light source 111 with respect to the high-speed axis direction, and the first SAC lens 151 functions to make the first laser beam L1 via the first FAC lens 131 relatively The effect of paralleling in the direction of the low speed axis. The first laser beam L1 passing through the first FAC lens 131 and the first SAC lens 151 may have a cross section in an elliptical shape that is long in the low speed axis direction.

A second FAC lens 132 and a second SAC lens 152 are disposed between the second laser light source 112 and the second mirror 172, and a third FAC lens 133 and a third are disposed between the third laser light source 113 and the third mirror 173. 3SAC lens 153. A fourth FAC lens 141 and a fourth SAC lens 161 are disposed between the fourth laser light source 131 and the fourth mirror 181, and a fifth FAC lens 142 and a fifth are disposed between the fifth laser light source 122 and the fifth mirror 182. 5SAC lens 162. Further, a sixth FAC lens 143 and a sixth SAC lens 163 are provided between the sixth laser light source 123 and the sixth mirror 183. The second FAC lens to the sixth FAC lens 132, 133, 141, 142, and 143 can perform the same function as the first FAC lens 131, and the second to sixth SAC lenses 152, 153, 161, 162, and 163 perform the first SAC lens. 151 the same function.

The beam coupler can include a polarization beam combiner 193. Further, polarization conversion for converting the polarization directions of the first laser beam L1, the second laser beam L2, and the third laser beam L3 can be provided on the path between the mirror 170 of the third row and the polarization beam coupler 193. Polarization converter 192. As the polarization converter 192, for example, a 1/2 wavelength plate can be used. When the first laser beam L1 to the sixth laser beam L6 have the first polarization direction, the first laser beam L1, the second laser beam L2, and the third laser beam L3 that pass through the polarization converter 192 can be used. The second polarization direction is perpendicular to the first polarization direction. On the other hand, between the mirror 170 in the third row and the polarization converter 192, the first laser beam L1, the second laser beam L2, and the third laser beam L3 can be further reflected toward the polarization converter 192 side. Mirror 191.

In the light source device 100 having the above configuration, the first to sixth laser light sources L1 to L6 are emitted from the first to fourth laser light sources 111, 112, 113, 121, 122, and 123. Here, the first to sixth laser beams L1 to L6 may have a first polarization direction. Next, the first laser beam L1, the second laser beam L2, and the third laser beam L3 emitted from the first laser light source 111, the second laser light source 112, and the third laser light source 113 are formed by the first mirror. 171. The second mirror 172 and the third mirror 173 reflect. Here, as described above, the first laser light source 111, the second laser light source 112, and the third laser light source 113 are provided with a step having a specific size h, whereby the first laser beam L1 and the second beam are provided. The laser beam L2 and the third laser beam L3 are spatially coupled. Further, the fourth laser beam L4, the fifth laser beam L5, and the sixth laser beam L6 emitted from the fourth laser light source 121, the fifth laser light source 122, and the sixth laser light source 123 are formed by the fourth mirror. 181. The fifth mirror 182 and the sixth mirror 183 are reflected. Here, as described above, the fourth laser light source 121, the fifth laser light source 122, and the sixth laser light source 123 are provided with a step having a specific size h, whereby the fourth laser beam L4, the fifth The laser beam L5 and the sixth laser beam L6 are spatially coupled.

Fig. 5a is a view showing a cross section of a laser beam passing through the AA' plane of Fig. 1.

Referring to FIG. 5a, the first laser beam L1, the second laser beam L2, and the third laser beam L3 are spatially coupled by the laser light source 110 of the first row provided with a specific step h. The fourth laser beam L4, the fifth laser beam L5, and the sixth laser beam L6 are spatially coupled by the laser light source 120 of the second row provided with a step. Here, the interval h between the first laser beam L1, the second laser beam L2, and the third laser beam L3 that are spatially coupled with the first laser light source 111, the second laser light source 112, and the third The step size h between the laser light sources 113 is the same, and the space h between the fourth laser beam L4, the fifth laser beam L5, and the sixth laser beam L6, which are spatially coupled, and the fourth laser light source 121 are the same. The step size h between the fifth laser source 122 and the sixth laser source 123 is the same. On the other hand, the first laser beam L1 and the fourth laser beam L4, the second laser beam L2 and the fifth laser beam L5, and the third laser beam L3 and the sixth laser beam L6 have the same respectively. height.

Next, the first laser beam L1, the second laser beam L2, and the third laser beam L3, which are spatially coupled, are incident on the polarization converter 192 after being reflected by the mirror. The polarization converter 192 can be disposed to the third surface S3 of the substrate 101. Here, the polarization converter 192 can function to convert the first polarization directions of the incident first laser beam L1, the second laser beam L2, and the third laser beam L3 into the second polarization direction. Here, the second polarization direction may be perpendicular to the first polarization direction. The first laser beam L1, the second laser beam L2, and the third laser beam L3 having the second polarization direction are incident on the polarization beam coupler 193 via the polarization converter 192. Further, the fourth laser beam L4, the fifth laser beam L5, and the sixth laser beam L6, which are spatially coupled, are also incident on the polarization beam coupler 193, the fourth laser beam L4 and the fifth laser beam L5. And the sixth laser beam L6 has a first polarization direction.

The polarization beam coupler 193 transmits a light beam having a first polarization direction and reflects a light beam having a second polarization direction. The polarization beam coupler 193 can be disposed to the third face S3 of the substrate 101. Thereby, the first laser beam L1, the second laser beam L2, and the third laser beam L3 having the second polarization direction are reflected by the polarization beam coupler 193, and the fourth laser beam L4 having the first polarization direction is The fifth laser beam L5 and the sixth laser beam L6 are transmitted through the polarization beam coupler, whereby the first laser beam L1, the second laser beam L2, and the third laser beam L3 having the second polarization direction have the same The fourth laser beam L4, the fifth laser beam L5, and the sixth laser beam L6 in the polarization direction are coupled.

Fig. 5b is a view showing a cross section of a laser beam passing through the plane BB' of Fig. 1.

Referring to Fig. 5b, the first laser beam L1, the second laser beam L2, and the third laser beam L3 having the second polarization direction and the fourth laser beam L4 and the fifth laser beam L5 having the first polarization direction are provided. And the sixth laser beam L6 is coupled by a polarization beam coupler. The interval h between the coupled laser beams L1+L4, L2+L5, L3+L6 and the step size h or the fourth laser source 121 between the first laser source 111, the second laser source 112, and the third laser source 113 The step size h between the fifth laser source 122 and the sixth laser source 123 is the same.

As described above, the coupled laser beam L1 to laser beam L6 emerging from the polarization beam coupler 193 can be coupled to the fiber 199 by a coupling lens 194.

In the present embodiment, the laser light source 110 of the first row and the laser light source 120 of the second row are alternately arranged, and the mirror 170 of the third row is disposed outside the laser light source 120 of the second row, the fourth The row of mirrors 180 are disposed outside the laser light source 110 of the first row. Further, the laser light sources 110 of the first row are electrically connected to each other by a conductor (not shown), and the laser light sources 120 of the second row are electrically connected to each other by a conductor (not shown). Here, the laser beams L1, L2, and L3 emitted from the laser light source 110 of the first row need to pass between the laser light sources 120 of the second row without being interfered by the conductors of the laser light source 120 connected to the second row. . Further, the laser beams L4, L5, and L6 emitted from the laser light source 120 of the second row need to pass between the laser light sources 110 of the first row without being interfered by the conductors of the laser light source 110 connected to the first row.

6a to 6c are views showing a method of electrically connecting laser light sources. 6a and 6c, it is exemplarily shown that the fourth laser beam L4 emitted from the fourth laser light source 121 is electrically connected when passing between the first laser light source 111 and the second laser light source 112. A method of the first laser light source 111 and the second laser light source 112.

Referring to FIG. 6a, the first laser light source 111 and the second laser light source 112 are electrically connected by a metal wire 105. The metal wire 105 may include, for example, Au, Al, or the like, but is not limited thereto. In this case, the fourth laser beam L4 passes through the lower portion of the metal wire 105 by adjusting the shape of the metal wire 105.

Referring to FIG. 6b, the first laser light source 111 and the second laser light source 112 are electrically connected by a conductive structure 106. The conductive structure 106 may include, for example, a conductive epoxy resin, but is not limited thereto. In this case, the fourth laser beam L4 passes through the lower portion of the conductive structure 106 by adjusting the shape of the conductive structure 106.

Referring to FIG. 6c, the first laser light source 111 and the second laser light source 112 are electrically connected by a connection pad 107. In this case, the fourth laser beam L4 can pass through the upper or lower portion of the connection pad 1107 by adjusting the height of the connection pad 107.

As described above, in the present embodiment, the laser beam L1 to the laser beam L6 emitted from the laser light sources 111, 112, 113, 121, 122, 123 can be efficiently realized by spatial coupling and polarization coupling. The light source device 100 is output. Generally, in order to achieve high output, it is necessary to increase the number of laser light sources. However, in the case where the number of laser light sources is increased only by utilizing the spatial coupling of the step differences, as the height of the laser light source changes, the light loss increases, and thus the number of laser light sources increases. limit. However, the optical loss can be minimized by spatially coupling and polarization coupling the laser beam L1 to the laser beam L6 as in the present embodiment, and the laser light sources 111, 112, 113, 121, 122, 123 are effectively increased. Number.

Further, in the present embodiment, the laser light source 110 of the first row and the laser light source 120 of the second row are arranged alternately with each other, and the mirror 170 of the third row and the mirror 180 of the fourth row are set to the first row. The laser light source 110 and the outer side of the laser light source 120 of the second row can thereby realize the light source device 100 having a more simplified structure. Further, the SAC lens disposed between the laser light source and the mirror can be disposed at various positions on the path between the laser light source and the mirror according to the focal length, and can also reduce the influence of the aberration of the lens. And set more than one.

Fig. 7 is a plan view showing a light source device according to another exemplary embodiment of the present invention. The polarization directions of the laser beams L1, L2, and L3 emitted from the laser light source 210 of the first row are different from those of the laser beams L4, L5, and L6 emitted from the laser light source 220 of the second row, and are not set. The light source device 200 shown in Fig. 7 is the same as the light source device 100 shown in Fig. 1 except for the polarization converter.

Referring to Fig. 7, the first laser light source 211, the second laser light source 212, and the third laser light source 213 constituting the laser light source 210 of the first row can emit the first laser beam L1 having the first polarization direction. 2 laser beam L2 and third laser beam L3. Here, the first laser light source 211, the second laser light source 212, and the third laser light source 213 can be respectively provided to the first surface S1, the second surface S2, and the third surface of the substrate 201 in accordance with the step of a specific size. S3. Further, the fourth laser light source 221, the fifth laser light source 222, and the sixth laser light source 223 constituting the laser light source 220 of the second row can emit the fourth mine having the second polarization direction perpendicular to the first polarization direction. The light beam L4, the fifth laser beam L5, and the sixth laser beam L6. Here, the fourth laser light source 221, the fifth laser light source 222, and the sixth laser light source 223 can be respectively provided to the first surface S1, the second surface S2, and the third surface of the substrate 201 in accordance with the step of a specific size. S3.

The first laser beam L1, the second laser beam L2, and the third laser beam L3 pass through the first FAC lens 231, the second FAC lens 232, the third FAC lens 233, the first SAC lens 251, the second SAC lens 252, and the third SAC lens. After 253, the mirror 270 of the third row (that is, the first mirror 271, the second mirror 272, and the third mirror 273) is reflected. Here, the first laser beam L1, the second laser beam L2, and the third laser beam L3 may be spatially coupled. Further, the fourth laser beam L4, the fifth laser beam L5, and the sixth laser beam L6 pass through the fourth FAC lens 241, the fifth FAC lens 242 and the sixth FAC lens 343, the fourth SAC lens 261, and the fifth SAC lens 262. After the sixth SAC lens 263, it is reflected by the mirror 280 of the fourth row (that is, the fourth mirror 281, the fifth mirror 282, and the sixth mirror 283). Here, the fourth laser beam L4, the fifth laser beam L5, and the sixth laser beam L6 may be spatially coupled.

Next, the first laser beam L1, the second laser beam L2, and the third laser beam L3 having the first polarization direction are reflected by the mirror 291 and then incident on the polarization beam coupler 293, and have the fourth polarization direction. The laser beam L4, the fifth laser beam L5, and the sixth laser beam L6 are also incident on the polarization beam coupler 293. The polarization beam coupler 293 reflects the first laser beam L1, the second laser beam L2, and the third laser beam L3 having the first polarization direction, and causes the fourth laser beam L4 and the fifth mine having the second polarization direction. The first laser beam L1, the second laser beam L2, and the third laser beam L3 having the second polarization direction are transmitted through the fourth beam having the first polarization direction. The laser beam L4, the fifth laser beam L5, and the sixth laser beam L6 are coupled.

The first to sixth laser beams L1 to L6 coupled in this manner can be coupled to the optical fiber 299 by the coupling lens 293.

Fig. 8 is a plan view showing a light source device according to still another exemplary embodiment of the present invention. 9 is a side view of the light source device shown in FIG. 8. The light source device 300 shown in FIGS. 8 and 9 is the same as the light source device 100 shown in FIG. 1 except that there is a step difference between the adjacent laser light source 310 in the first row and the laser light source 320 in the second row.

Referring to FIG. 8, the light source device 300 includes a laser light source, a mirror, and a beam coupler that are disposed on the substrate 301. The laser source may include a laser source 310 of the first row and a laser source 320 of the second row that are disposed opposite each other. The laser light source 310 of the first row may include a first laser light source 311, a second laser light source 312, and a third laser light source 313. The laser light source 320 of the second row may include a fourth laser light source 321, a fifth laser light source 322, and a sixth laser light source 323. Here, the laser light source 310 of the first row and the laser light source 320 of the second row may be alternately arranged with each other. Thereby, the first laser beam L1 passes between the fourth laser light source 321 and the fifth laser light source 322, and the second laser beam L2 passes between the fifth laser light source 322 and the sixth laser light source 323. Further, the fourth laser beam L4 passes between the first laser light source 311 and the second laser light source 312, and the fifth laser beam L5 passes between the second laser light source 312 and the third laser light source 313.

The first laser light source 311, the second laser light source 312, and the third laser light source 313 constituting the laser light source 310 of the first row emit the first laser beam L1, the second laser beam L2, and the third laser beam. L3, the fourth laser light source 321, the fifth laser light source 322, and the sixth laser light source 323 constituting the laser light source 320 of the second row emit the fourth laser beam L4, the fifth laser beam L5, and the sixth mine The light beam L6. Here, the first to sixth laser beams L1 to L6 may have the same polarization direction, for example, the first polarization direction.

The first laser light source 311, the second laser light source 312, and the third laser light source 313 constituting the laser light source 310 of the first row are disposed so as to have a step of a specific size h so that the first laser beam L1 is provided. The second laser beam L2 and the third laser beam L3 do not interfere. Further, the fourth laser light source 321, the fifth laser light source 322, and the sixth laser light source 323 constituting the laser light source 320 of the second row are disposed so as to have a step of a specific size h so that the fourth laser beam is provided. L4, the fifth laser beam L5, and the sixth laser beam L6 do not interfere. Further, the adjacent laser light source 310 of the first row and the laser light source 320 of the second row are also provided with a step having a specific size h.

As shown in FIG. 9, the substrate 301 may include first to sixth surfaces S1 to S6 which are sequentially disposed according to a step of a specific size h. Here, the first surface S1 has the highest height, and the sixth surface S6 has the lowest the height of. The first laser light source 311, the second laser light source 312, and the third laser light source 313 constituting the laser light source 310 of the first row can be respectively provided to the first surface S1, the third surface S3, and the fifth surface of the substrate 301. S5. Further, the fourth laser light source 321 , the fifth laser light source 322 , and the sixth laser light source 323 constituting the laser light source 320 of the second row can be respectively provided to the second surface S2 and the fourth surface S4 and the second surface of the substrate 301 . 6 faces S6.

The mirror may include a mirror 370 arranged in the third row outside the laser light source 320 in the second row, and a mirror 380 in the fourth row disposed outside the laser light source 310 in the first row. Here, the mirror 370 of the third row may include the first mirror 371, the second mirror 372, and the third mirror that reflect the first laser beam L1, the second laser beam L2, and the third laser beam L3. 373. The mirror 380 of the fourth row may include a fourth mirror 381, a fifth mirror 382, and a sixth mirror 383 that reflect the fourth laser beam L4, the fifth laser beam L5, and the sixth laser beam L6. . Here, the first mirror 371, the second mirror 372, and the third mirror 373 may be provided to the first surface S1, the third surface S3, and the fifth surface S5 of the substrate 301, respectively, and the fourth mirror 381 and the fifth mirror 5, respectively. The mirror 382 and the sixth mirror 383 can be respectively provided to the second surface S2, the fourth surface S4, and the sixth surface S6 of the substrate 301.

The first FAC lens 331 and the first SAC lens 351 may be disposed between the first laser light source 311 and the first mirror 371, and the second FAC lens 332 and the second laser 312 may be disposed between the second laser light source 312 and the second mirror 372. The 2SAC lens 352 is provided with a third FAC lens 333 and a third SAC lens 353 between the third laser light source 313 and the third mirror 373. Further, a fourth FAC lens 341 and a fourth SAC lens 361 may be provided between the fourth laser light source 321 and the fourth mirror 381, and a fifth FAC lens 342 may be provided between the fifth laser light source 322 and the fifth mirror 382. The fifth SAC lens 362 and the sixth FAC lens 343 and the sixth SAC lens 363 are provided between the sixth laser light source 323 and the sixth mirror 383.

The beam coupler can include a polarizing beam coupler 393. Further, a polarization converter 392 that converts the polarization directions of the first laser beam L1, the second laser beam L2, and the third laser beam L3 may be provided between the mirror 370 of the third row and the polarization beam coupler 393. As the polarization converter 392, for example, a half-wavelength plate can be used. As described above, when the first laser beam L1 to the sixth laser beam L6 have the first polarization direction, the first laser beam L1, the second laser beam L2, and the third thunder pass through the polarization converter 392. The light beam L3 may have a second polarization direction perpendicular to the first polarization direction. On the other hand, between the mirror 370 of the third row and the polarization converter 392, the first laser beam L1, the second laser beam L2, and the third laser beam L3 can be further reflected toward the polarization converter 392 side. Mirror 391.

In the light source device 300 having the above-described configuration, the first laser light source L1 having the first polarization direction is emitted from the first laser light source to the sixth laser light source 311, 312, 313, 321, 322, and 323. 6 laser beam L6. Next, the first laser beam L1, the second laser beam L2, and the third laser beam L3 are reflected by the first mirror 371, the second mirror 372, and the third mirror 373. Here, the first laser beam L1, the second laser beam L2, and the third laser beam L3 are spatially coupled. Further, the fourth laser beam L4, the fifth laser beam L5, and the sixth laser beam L6 are reflected by the fourth mirror 381, the fifth mirror 382, and the sixth mirror 383. Here, the fourth laser beam L4, the fifth laser beam L5 and the sixth laser beam L6 are spatially coupled.

Fig. 10a is a view showing a cross section of a laser beam passing through the AA' plane of Fig. 8.

Referring to Fig. 10a, the first laser beam L1, the second laser beam L2, and the third laser beam L3 are spatially coupled, where the first laser beam L1, the second laser beam L2, and the third laser beam are coupled. The interval 2h between the light beams L3 is the same as the step size 2h between the first laser light source 311, the second laser light source 312, and the third laser light source 313. Further, the fourth laser beam L4, the fifth laser beam L5, and the sixth laser beam L6 are spatially coupled, where the fourth laser beam L4, the fifth laser beam L5, and the sixth laser beam L6 are spatially coupled. The interval 2h is the same as the step size 2h between the fourth laser light source 321, the fifth laser light source 322, and the sixth laser light source 323.

Next, the first laser beam L1, the second laser beam L2, and the third laser beam L3, which are spatially coupled, are reflected by the mirror 391 and then incident on the polarization converter 392. Here, the polarization converter 392 converts the first polarization directions of the incident first laser beam L1, the second laser beam L2, and the third laser beam L3 into the second conversion direction. The second polarization direction may be perpendicular to the first polarization direction. The first laser beam L1, the second laser beam L2, and the third laser beam L3 having the second polarization direction are incident on the polarization beam coupler 393 by the polarization converter 392. Further, the fourth laser beam L4, the fifth laser beam L5, and the sixth laser beam L6 having the first polarization direction coupled in space are also incident on the polarization beam coupler 393.

The polarization beam coupler 393 reflects the first laser beam L1, the second laser beam L2, and the third laser beam L3 having the second polarization direction, and causes the fourth laser beam L4 and the fifth mine having the first polarization direction. The first laser beam L1, the second laser beam L2, and the third laser beam L3 having the second polarization direction and the fourth laser beam having the first polarization direction are transmitted through the beam L5 and the sixth laser beam L6. The beam L4, the fifth laser beam L5, and the sixth laser beam L6 are coupled.

Fig. 10b is a view showing a cross section of a laser beam passing through the BB' plane of Fig. 1;

Referring to Fig. 10b, the first laser beam L1, the second laser beam L2, and the third laser beam L3 having the second polarization direction and the fourth laser beam L4 and the fifth laser beam L5 having the first polarization direction And the sixth laser beam L6 is coupled by a polarization beam coupler 393. Here, the first laser beam L1, the second laser beam L2, and the third laser beam L3 and the fourth portion are caused by the step difference between the adjacent laser light source 310 and the second laser light source 320 in the first row. The laser beam L4, the fifth laser beam L5, and the sixth laser beam L6 are alternately arranged up and down. The spacing h between such laser beams may be the step size h between the adjacent laser source 310 and the second laser source 320 in the first row. Also, the laser beam L1 to the laser beam L6 coupled in this manner can be coupled to the optical fiber 399 by the coupling lens 394.

On the other hand, the first laser light source 311, the fourth laser light source 321, the second laser light source 312, the fifth laser light source 322, the third laser light source 313, and the sixth laser light source 323 are of a specific size. The case where the steps of h are sequentially set is explained. However, the laser light source 310 and the second laser light source 320 in the first row can be variously arranged by using the step, and are not limited thereto.

11a and 11b are views showing a modification of the laser beam passing through the AA' plane and the BB' plane of Fig. 8. FIG. 11a shows a case where the first laser light source, the second laser light source, and the third laser light source are arranged in accordance with a step of a specific size, so that the first laser beam L1, the second laser beam L2, and the first 3 laser beam L3 is spatially coupled, and the fourth laser source, the fifth laser source, and the fifth laser source are arranged according to a step of a specific size, so that the fourth laser beam L4 and the fifth laser beam L5 And the sixth laser beam L6 is spatially coupled. Here, the fourth laser beam L4, the fifth laser beam L5, and the sixth laser beam L6 may be formed at positions lower than the first laser beam L1, the second laser beam L2, and the third laser beam L3. . Further, Fig. 11b shows a case where the first laser beam L1, the second laser beam L2, and the third laser beam L3 having the second polarization direction have the first polarization in the state shown in Fig. 11a. The fourth laser beam L4, the fifth laser beam L5, and the sixth laser beam L6 in the direction are coupled by a polarization beam coupler.

On the other hand, in the light source device 300 shown in FIG. 8, the first laser beam L1 having the same polarization direction, for example, the first polarization direction, is emitted to the laser light sources 311, 312, 313, 321, 322, and 323 to The case of the sixth laser beam L6 is explained. However, similarly to the configuration shown in FIG. 7, the first laser light source 311, the second laser light source 312, and the third laser light source 313 may emit the first laser beam having the first polarization direction. The L1, the second laser beam L2, and the third laser beam L3, the fourth laser source 321 , the fifth laser source 322, and the sixth laser source 323 emit the fourth laser beam L4 having the second polarization direction, The fifth laser beam L5 and the sixth laser beam L6. In this case, the polarization converter 392 shown in Fig. 8 is not provided.

Fig. 12 is a plan view showing a light source device according to still another exemplary embodiment of the present invention.

Referring to FIG. 12, the light source device 400 includes a laser light source, a mirror, and a beam coupler that are disposed on the substrate 401. The laser source may include a laser source 410 of the first row and a laser source 420 of the second row that are disposed opposite each other. The laser light source 410 of the first row may include a first laser light source 411, a second laser light source 412, and a third laser light source 413. The laser light source 420 of the second row may include a fourth laser light source 421, a fifth laser light source 422, and a sixth laser light source 423. Here, the laser light source 410 of the first row and the laser light source 420 of the second row may be alternately arranged with each other.

The first laser light source 411, the second laser light source 412, and the third laser light source 413 constituting the laser light source 410 of the first row emit the first laser beam L1, the second laser beam L2, and the third laser beam. L3, the fourth laser light source 421, the fifth laser light source 422, and the sixth laser light source 423 constituting the laser light source 420 of the second row emit the fourth laser beam L4, the fifth laser beam L5, and the sixth mine The light beam L6. Here, the first to sixth laser beams L1 to L6 may have the same wavelength range.

In the light source device 400 shown in FIG. 12, the configurations of the laser light sources 411, 412, 413, 421, 422, and 423 are the same as those in FIG. Specifically, the first laser light source 411, the second laser light source 412, and the third laser light source 413 are disposed so as to have a step of a specific size so that the first laser beam L1 and the second laser beam L2 and The third laser beam L3 does not interfere. Here, the first laser light source 411, the second laser light source 412, and the third laser light source 413 may be provided to the first surface S1, the second surface S2, and the third surface S3 of the substrate 401, respectively. The fourth laser light source 421, the fifth laser light source 422, and the sixth laser light source 423 are disposed in a manner having a step of a specific size so that the fourth laser beam L4, the fifth laser beam L5, and the sixth laser beam are provided. The light beam L6 does not interfere. Here, the fourth laser light source 421, the fifth laser light source 422, and the sixth laser light source 423 may be provided to the first surface S1, the second surface S2, and the third surface S3 of the substrate 401, respectively. The laser light source 410 of the first row adjacent to each other and the laser light source 420 of the second row are disposed on a plane of the same height.

The mirror may include a mirror 470 arranged in the third row outside the laser light source 420 in the second row, and a mirror 480 in the fourth row disposed outside the laser light source 410 in the first row. Here, the mirror 470 of the third row may include the first mirror 471, the second mirror 472, and the third mirror that reflect the first laser beam L1, the second laser beam L2, and the third laser beam L3. 473. The mirror 480 of the fourth row may include a fourth mirror 481, a fifth mirror 482, and a sixth mirror 483 that reflect the fourth laser beam L4, the fifth laser beam L5, and the sixth laser beam L6. .

The first FAC lens 431 and the first SAC lens 451 may be disposed between the first laser light source 411 and the first mirror 471, and the second FAC lens 432 and the second laser light source 412 and the second mirror 472 may be disposed between the second laser light source 412 and the second mirror 472. The 2SAC lens 452 is provided with a third FAC lens 433 and a third SAC lens 453 between the third laser light source 413 and the third mirror 473. Further, a fourth FAC lens 441 and a fourth SAC lens 461 may be provided between the fourth laser light source 421 and the fourth mirror 481, and a fifth FAC lens 442 may be provided between the fifth laser light source 422 and the fifth mirror 482. The fifth SAC lens 462 and the sixth FAC lens 443 and the sixth SAC lens 463 are provided between the sixth laser light source 423 and the sixth mirror 483.

The beam coupler can include a wavelength beam coupler 493 that couples beams of different wavelengths. As such a wavelength beam coupler 493, for example, a dichroic mirror can be used, but it is not limited thereto. Further, a first wavelength selecting element 495 can be disposed between the mirror 470 of the third row and the wavelength beam coupler 493, and a second wavelength selecting element can be disposed between the mirror 480 of the fourth row and the wavelength beam coupler 493. 496.

The first wavelength selecting element 495 can selectively transmit only the first wavelength range in the wavelength range of the incident light beam, and the second wavelength selecting element 496 can selectively only make the first wavelength range in the wavelength range of the incident light beam. Through. As such a first wavelength selection element 495 and a second wavelength selection element 496, for example, VBG (Volume Bragg Grating) can be used.

In the light source device 400 having the above-described configuration, the first to sixth laser light sources L1 to L6 are emitted from the first to sixth laser light sources 411, 412, 413, 421, 422, and 423. Here, the first to sixth laser beams L1 to L6 may have the same wavelength range. However, it is not necessarily limited to this. Next, the first laser beam L1, the second laser beam L2, and the third laser beam L3 are reflected by the first mirror 471, the second mirror 472, and the third mirror 473. Here, the first laser beam L1, the second laser beam L2, and the third laser beam L3 are spatially coupled. Further, the fourth laser beam L4, the fifth laser beam L5, and the sixth laser beam L6 are reflected by the fourth mirror 481, the fifth mirror 482, and the sixth mirror 483. Here, the fourth laser beam L4, the fifth laser beam L5 and the sixth laser beam L6 are spatially coupled.

Next, the first laser beam L1, the second laser beam L2, and the third laser beam L3 are incident on the first wavelength selecting element 495. The first wavelength selecting element 495 selectively transmits only the first wavelength range in the wavelength range of the first laser beam L1, the second laser beam L2, and the third laser beam L3. As described above, the first laser beam L1, the second laser beam L2, and the third laser beam L3 having the first wavelength range are reflected by the mirror 491 via the first wavelength selecting element 495, and are incident to the wavelength beam coupling. 493. Further, the fourth laser beam L4, the fifth laser beam L5, and the sixth laser beam L6 are incident on the second wavelength selecting element 496. The second wavelength selecting element 496 selectively transmits only the second wavelength range in the wavelength range of the fourth laser beam L4, the fifth laser beam L5, and the sixth laser beam L6. The fourth laser beam L4, the fifth laser beam L5, and the sixth laser beam L6 having the second wavelength range are incident on the wavelength beam coupler 494 via the second wavelength selecting element.

The wavelength beam coupler 494 reflects the first laser beam L1, the second laser beam L2, and the third laser beam L3 having the first wavelength range, and causes the fourth laser beam L4 and the fifth mine having the second wavelength range. The first laser beam L1, the second laser beam L2, and the third laser beam L3 having the first wavelength range can be transmitted to the fourth wavelength range. The laser beam L4, the fifth laser beam L5, and the sixth laser beam L6 are coupled. Also, the laser beam L1 to the laser beam L6 coupled in this manner can be coupled to the optical fiber 499 by the coupling lens 494.

In the light source device 400 of the present embodiment, two rows of laser light sources 411, 412, 413, 421, 422, and 423 are alternately arranged, and the mirrors 471, 472, 473, 481, 482, and 483 are set to the laser light source. The outer sides of 411, 412, 413, 421, 422, and 423, whereby a more simplified configuration can be realized. In addition, the laser beam L1 to the laser beam L6 having different wavelength ranges may be coupled to the optical fiber.

In the light source device shown in FIG. 12, the case where the laser light source 410 of the first row adjacent to each other and the laser light source 420 of the second row are provided on the same height plane have been described. However, similarly to the configuration shown in FIGS. 8 and 9, the laser light source 410 of the first row adjacent to each other and the laser light source 420 of the second row can be disposed with a step difference, in addition to The laser light sources 411, 412, 413, 421, 422, and 423 may be provided in various forms.

Fig. 13 is a plan view showing a light source device according to still another exemplary embodiment of the present invention. The wavelength ranges of the laser beams L1, L2, and L3 emitted from the laser light source 510 of the first row are different from those of the laser beams L4, L5, and L6 emitted from the laser light source 520 of the second row, and are not set. The light source device 500 shown in Fig. 13 is the same as the light source device 400 shown in Fig. 12 except for the first wavelength selecting element and the second wavelength selecting element.

Referring to Fig. 13, the first laser light source 511, the second laser light source 512, and the third laser light source 513 constituting the laser light source 510 of the first row can emit the first laser beam L1 having the first wavelength range. 2 laser beam L2 and third laser beam L3. Here, the first laser light source 511, the second laser light source 512, and the third laser light source 513 may be provided to the first surface S1, the second surface S2, and the third surface S3 of the substrate 501, respectively. Further, the fourth laser light source 521, the fifth laser light source 522, and the sixth laser light source 523 constituting the laser light source 520 of the second row can emit the fourth laser beam L4 and the fifth mine having the second wavelength range. The light beam L5 and the sixth laser beam L6. Here, the fourth laser light source 521, the fifth laser light source 522, and the sixth laser light source 523 may be provided to the first surface S1, the second surface S2, and the third surface S3 of the substrate 501, respectively.

The first laser beam L1, the second laser beam L2, and the third laser beam L3 pass through the first FAC lens 531, the second FAC lens 532, the third FAC lens 533, the first SAC lens 551, the second SAC lens 552, and the third SAC. After the lens 553, it is reflected by the mirror 570 of the third row (that is, the first mirror 571, the second mirror 572, and the third mirror 573). Here, the first laser beam L1, the second laser beam L2, and the third laser beam L3 may be spatially coupled. Further, the fourth laser beam L4, the fifth laser beam L5, and the sixth laser beam L6 pass through the fourth FAC lens 541, the fifth FAC lens 542 and the sixth FAC lens 543, the fourth SAC lens 561, and the fifth SAC lens 562. After the sixth SAC lens 563, it is reflected by the mirror 580 of the fourth row (that is, the fourth mirror 581, the fifth mirror 582, and the sixth mirror 583). Here, the fourth laser beam L4, the fifth laser beam L5, and the sixth laser beam L6 may be spatially coupled.

Next, the first laser beam L1, the second laser beam L2, and the third laser beam L3 having the first wavelength range are reflected by the mirror 591 and then incident on the wavelength beam coupler 593, and have the fourth wavelength range. The laser beam L4, the fifth laser beam L5, and the sixth laser beam L6 are also incident on the wavelength beam coupler 593. The wavelength beam coupler 593 reflects the first laser beam L1, the second laser beam L2, and the third laser beam L3 having the first wavelength range, and causes the fourth laser beam L4 and the fifth mine having the second wavelength range. The first laser beam L1, the second laser beam L2, and the third laser beam L3 having the first wavelength range can be transmitted to the fourth wavelength range. The laser beam L4, the fifth laser beam L5, and the sixth laser beam L6 are coupled. The first to sixth laser beams coupled in this manner can be coupled to the optical fiber 599 by a coupling lens 594.

According to the above embodiment, the light source device of high efficiency and high output can be realized by spatially coupling and polarizing coupling of the laser beam emitted from the laser light source. Further, the laser light source is arranged alternately with each other, and the mirror is disposed outside the laser light source, whereby a light source device having a more simplified structure can be produced. Alternatively, a laser beam having a different wavelength range may be coupled to be incident on the optical fiber.

The embodiments of the present invention have been described above, but the above-described embodiments are merely examples, and those skilled in the art should understand that various modifications and equivalents can be made.

100, 200, 300, 400, 500‧‧‧ light source devices

101, 201, 301, 401, 501‧‧‧ substrates

S1‧‧‧ first side

S2‧‧‧2nd

S3‧‧‧3rd

105‧‧‧Metal wire

106‧‧‧Electrically conductive structures

107‧‧‧Connecting mat

110, 210, 310, 410, 510‧ ‧ the first line of laser light source

111, 211, 311, 411, 511‧‧‧1st laser source

111a‧‧‧Sub Mounting Substrate

112, 212, 312, 412, 512‧‧‧2nd laser source

113, 213, 313, 413, 513 ‧ ‧ 3rd laser source

111b‧‧‧Laser diode

120, 220, 320, 420, 520‧ ‧ the second line of laser light source

121, 221, 321, 421, 521 ‧ ‧ 4th laser source

122, 222, 322, 422, 522 ‧ ‧ 5th laser source

123, 223, 323, 423, 523‧‧‧6th laser source

131, 231, 331, 431, 531‧‧1st FAC lens

132, 232, 332, 432, 532‧ ‧ 2FAC lens

133, 233, 333, 433, 533 ‧ ‧ 3FAC lens

141, 241, 341, 441, 541 ‧ ‧ 4FAC lens

142, 242, 342, 442, 542 ‧ ‧ 5FAC lens

143, 243, 343, 443, 543 ‧ ‧ 6FAC lens

151, 251, 351, 451, 551 ‧ ‧ 1st SAC lens

152, 252, 352, 452, 552‧ ‧ 2nd SAC lens

153, 253, 353, 453, 553 ‧ ‧ 3SAC lens

161, 261, 361, 461, 561 ‧ ‧ 4SAC lens

162, 262, 362, 462, 562‧ ‧ 5th SAC lens

163, 263, 363, 463, 563 ‧ ‧ 6SAC lens

Mirrors of row 3, 170, 270, 370, 470, 570‧ ‧

171, 271, 371, 471, 571 ‧ ‧ 1st mirror

172, 272, 372, 472, 572 ‧ ‧ 2nd mirror

173, 273, 373, 473, 573 ‧ ‧ 3rd mirror

Mirrors on the 4th line of 180, 280, 380, 480, 580‧ ‧

181, 281, 381, 481, 581 ‧ ‧ 4th mirror

182, 282, 382, 482, 582‧ ‧ 5th mirror

183, 283, 383, 483, 583 ‧ ‧ 6th mirror

191, 291, 391, 491, 591‧‧ Mirror

192, 392‧‧ ‧ polarization converter

193, 293, 393‧‧ ‧ polarized beam coupler

194, 294, 394, 494, 594 ‧ ‧ coupling lens

199, 299, 399, 499, 599‧‧‧ fiber

S4‧‧‧4th

S5‧‧‧5th

S6‧‧‧6th

493, 593‧‧‧wavelength beam coupler

495‧‧‧1st wavelength selective component

496‧‧‧2nd wavelength selective component

A-A', B-B'‧‧ plane

D1‧‧‧ horizontal direction

D2‧‧‧Vertical direction

h‧‧‧Specific size/step size/interval/specific step

2h‧‧‧ step size/step size/interval

L1‧‧‧1st laser beam

L2‧‧‧2nd laser beam

L3‧‧‧3rd laser beam

L4‧‧‧4th laser beam

L5‧‧‧5th laser beam

L6‧‧‧6th laser beam

Θ1, θ2‧‧‧ divergence angle/angle

Fig. 1 is a plan view showing a light source device according to an exemplary embodiment of the present invention. Fig. 2 is a side view of the light source device shown in Fig. 1. Fig. 3 is a perspective view showing a laser light source applicable to the light source device shown in Fig. 1. Figure 4a is a top plan view of the laser source shown in Figure 3. Figure 4b is a front elevational view of the laser source shown in Figure 3. Figure 4c is a side view of the laser source shown in Figure 3. Fig. 5a is a view showing a cross section of a laser beam passing through the AA' plane of Fig. 1. Fig. 5b is a view showing a cross section of a laser beam passing through the plane BB' of Fig. 1. 6a to 6c are views showing a method of electrically connecting laser light sources. Fig. 7 is a plan view showing a light source device according to another exemplary embodiment of the present invention. Fig. 8 is a plan view showing a light source device according to still another exemplary embodiment of the present invention. Fig. 9 is a side view of the light source device shown in Fig. 8. Fig. 10a is a view showing a cross section of a laser beam passing through the AA' plane of Fig. 8. Fig. 10b is a view showing a cross section of a laser beam passing through the BB' plane of Fig. 8. 11a and 11b are views showing a modification of the laser beam passing through the AA' plane and the BB' plane of Fig. 8. Fig. 12 is a plan view showing a light source device according to still another exemplary embodiment of the present invention. Fig. 13 is a plan view showing a light source device according to still another exemplary embodiment of the present invention.

Claims (16)

A light source device comprising: a laser light source of a first row and a laser light source of a second row, arranged opposite to each other; and a mirror of the third row, reflecting a thunder emitted from the laser light source of the first row The light beam is disposed outside the laser light source of the second row; the mirror of the fourth row reflects the laser beam emitted from the laser light source of the second row, and is disposed to the Ray of the first row a light source coupler coupling a laser beam reflected by the mirror of The light source is alternately arranged with the laser light sources of the second row, the laser light sources of the first row are disposed with a step difference from each other, and the laser light sources of the second row are arranged with a step difference from each other . The light source device according to claim 1, wherein a pair of the first row of the laser light sources adjacent to each other and the second row of the laser light sources are disposed on a plane of the same height. The light source device according to claim 1, wherein the pair of the first row of the laser light sources adjacent to each other and the second row of the laser light sources are provided with a step difference from each other. The light source device according to claim 1, wherein the laser light source between the laser light source of the first row and the mirror of the third row, and the laser light source of the second row and the first A fast axis collimating lens is placed between the mirrors of 4 rows. The light source device of claim 4, wherein the mirror of the third row and the fast axis collimating lens, and the mirror of the fourth row collimate with the fast axis A slow axis collimating lens is placed between the lenses. The light source device of claim 1, wherein the beam coupler comprises a polarization beam coupler, and a polarization converter is disposed between the mirror of the third row and the beam coupler. The light source device of claim 1, wherein the beam coupler comprises a wavelength beam coupler, and a first wavelength selective element is disposed between the mirror of the third row and the beam coupler, A second wavelength selecting element is disposed between the mirror of the fourth row and the beam coupler. The light source device of claim 1, further comprising a coupling lens that couples the laser beam coupled by the beam coupler to the optical fiber. A light source device comprising: a laser light source of a first row and a laser light source of a second row, arranged opposite to each other; and a mirror of the third row, reflecting a thunder emitted from the laser light source of the first row The light beam is disposed outside the laser light source of the second row; the mirror of the fourth row reflects the laser beam emitted from the laser light source of the second row, and is disposed to the Ray of the first row An outer side of the light source; and a polarizing beam coupler that couples the laser beam reflected by the mirror of the third row to the laser beam reflected by the mirror of the fourth row; and the Ray of the first row The light source is arranged alternately with the laser light sources of the second row, the laser light sources of the first row are arranged with a step difference from each other, and the laser light sources of the second row have a step difference with each other Settings. The light source device of claim 9, wherein the laser beam emitted from the laser light source of the first row and the laser beam emitted from the laser light source of the second row have the same polarization direction . The light source device of claim 10, wherein a polarization converter is disposed between the mirror of the third row and the beam coupler. The light source device of claim 9, wherein the laser beam emitted from the laser light source of the first row and the laser beam emitted from the laser light source of the second row have different polarization directions . A light source device comprising: a laser light source of a first row and a laser light source of a second row, arranged opposite to each other; and a mirror of the third row, reflecting a thunder emitted from the laser light source of the first row The light beam is disposed outside the laser light source of the second row; the mirror of the fourth row reflects the laser beam emitted from the laser light source of the second row, and is disposed to the Ray of the first row An outer side of the light source; and a wavelength beam coupler that couples the laser beam reflected by the mirror of the third row to the laser beam reflected by the mirror of the fourth row; and the Ray of the first row The light source is arranged alternately with the laser light sources of the second row, the laser light sources of the first row are arranged with a step difference from each other, and the laser light sources of the second row have a step difference with each other Settings. The light source device of claim 13, wherein the laser beam emitted from the laser light source of the first row and the laser beam emitted from the laser light source of the second row have the same wavelength range . The light source device of claim 14, wherein a first wavelength selecting element is disposed between the mirror of the third row and the beam coupler, and the mirror of the fourth row is A second wavelength selecting element is disposed between the beam couplers. The light source device according to claim 15, wherein the first wavelength selection element and the second wavelength selection element comprise a bulk Bole grating.