Multi-junction chip beam shaping method and laser

Abstract

The present disclosure relates to the technical field of lasers, and provides a multi-junction chip beam shaping method and a laser. The multi-junction chip beam shaping method provided in the present disclosure comprises: step S1, providing a multi-junction chip, the multi-junction chip at least comprising a first active laser junction and a second active laser junction, the attribute of light excited by the first active laser junction being different from that of light excited by the second active laser junction, and the attribute comprising at least one of a polarization mode and a wavelength; and step S2, on the basis of the difference between the attributes of the light, separating the light excited by the first active laser junction from the light excited by the second active laser junction and then, on the basis of the difference between the attributes of the light, combining same. In the present solution, on the basis of the difference of the light attributes, the light emitted by the multi-junction chip can be combined. After the light excited by the first active laser junction and the light excited by the second active laser junction have been combined, the degree of overlapping of light spots generated by the first active laser junction and the second active laser junction is improved, and dark regions are removed, thereby increasing the brightness in unit area.

Description

Multi-junction chip beam shaping method and laser

[0001] Cross Reference to Related Applications

[0002] This application claims priority to the application No. 202410734460.0 and entitled "Multi-junction chip beam shaping method and laser" filed with the China Patent Office on June 7, 2024, the whole content of which is incorporated herein by reference. TECHNICAL FIELD

[0003] The present disclosure relates to the technical field of lasers, in particular to a multi-junction chip beam shaping method and laser. BACKGROUND

[0004] The multi-junction chip is at least a double-junction chip, and the light output power of the multi-junction chip is multiple times of the light output power of a single-junction chip.

[0005] There is a gap between two adjacent active regions in the multi-junction chip, so that there is a dark area between the light emitted by the two adjacent active regions, resulting in low light output brightness per unit area of the multi-junction chip.

[0006] SUMMARY

[0007] The purpose of the present disclosure is to provide a multi-junction chip beam shaping method and laser to alleviate the technical problem of low light output brightness per unit area of the existing multi-junction chip.

[0008] The present disclosure provides a multi-junction chip beam shaping method, comprising:

[0009] Step S1. Providing a multi-junction chip, the multi-junction chip comprising at least a first active laser junction and a second active laser junction;

[0010] The properties of the light excited by the first active laser junction and the light excited by the second active laser junction are different, wherein the properties include at least one of polarization mode and wavelength;

[0011] Step S2. Separating the light excited by the first active laser junction and the light excited by the second active laser junction according to the difference in the properties of the light, and then combining the light according to the difference in the properties of the light.

[0012] Optionally, the step S2 comprises:

[0013] S21. Collimating the light excited by the first active laser junction and the light excited by the second active laser junction to form a first light beam and a second light beam, respectively;

[0014] S22. Emitting the first light beam and the second light beam to different directions according to the difference in the properties of the light, so as to separate the first light beam and the second light beam;

[0015] S23. Combining the separated first light beam and the second light beam according to the difference in the attribute of the light.

[0016] Optionally, in the step S2, the propagation direction of the first light beam is set as the light-out direction, so that the propagation direction of the collimated first light beam remains unchanged, but the collimated second light beam is arranged at an angle relative to the light-out direction.

[0017] Optionally, the step S22 specifically comprises: using a beam splitter to emit the first light beam and the second light beam towards different directions so as to separate the first light beam and the second light beam;

[0018] The step S23 specifically comprises: adjusting the first light beam and the second light beam to be parallel and in the same vertical position, wherein the vertical direction is the arrangement direction of the first active laser junction and the second active laser junction; and using a beam combiner to combine the first light beam and the second light beam;

[0019] When the polarization modes of the light excited by the first active laser junction and the light excited by the second active laser junction are different, the beam splitter and the beam combiner are both polarization prisms.

[0020] When the wavelengths of the light excited by the first active laser junction and the light excited by the second active laser junction are different, the beam splitter and the beam combiner are both wavelength selection plates.

[0021] In a second aspect, the disclosure provides a laser, comprising:

[0022] a multi-junction chip, the multi-junction chip comprising at least a first active laser junction and a second active laser junction; the light excited by the first active laser junction and the light excited by the second active laser junction being different in an attribute, wherein the attribute comprises at least one of a polarization mode and a wavelength;

[0023] a beam splitting module, the beam splitting module being configured to separate the light excited by the first active laser junction and the light excited by the second active laser junction according to the difference in the attribute of the light;

[0024] a beam combining module, the beam combining module being configured to combine the separated light of the beam splitting module according to the difference in the attribute of the light.

[0025] Optionally, the beam splitting module comprises:

[0026] a collimator, the collimator being arranged behind the multi-junction chip, the collimator being configured to collimate the light excited by the first active laser junction and the light excited by the second active laser junction, and form a first light beam and a second light beam respectively;

[0027] a beam splitter, the beam splitter being arranged behind the collimator, and being configured to emit the first light beam and the second light beam towards different directions so as to separate the first light beam and the second light beam.

[0028] The beam combining module is arranged behind the beam splitter.

[0029] Optionally, the beam splitter transmits the first light beam but reflects the second light beam.

[0030] The beam combining module comprises a first mirror, a translation prism, a second mirror and a beam combiner, the first mirror is arranged behind the reflecting surface of the beam splitter and configured to receive the reflected second light beam and reflect it to the translation prism; the translation prism is configured to adjust the first light beam and the second light beam to be in the same vertical position, the vertical position being the arrangement direction of the first active laser junction and the second active laser junction; the second mirror is arranged behind the translation prism and configured to receive the translated second light beam and reflect it to the beam combiner; the beam combiner receives the first light beam emitted from the beam splitter and the second light beam emitted from the second mirror and combines them.

[0031] Optionally, the first light beam and the second light beam have different polarization modes, and the beam splitter and the beam combiner are both polarization prisms.

[0032] Optionally, the first light beam and the second light beam have different wavelengths, and the beam splitter and the beam combiner are both wavelength selective films.

[0033] Optionally, the collimating mirror is coaxial with the first active laser junction.

[0034] The present disclosure has at least the following advantages or benefits:

[0035] The multi-junction chip light beam shaping method provided by the present disclosure comprises the following steps: S1. providing a multi-junction chip, the multi-junction chip comprising at least a first active laser junction and a second active laser junction; the light excited by the first active laser junction and the light excited by the second active laser junction have different properties, wherein the properties include at least one of polarization mode and wavelength; S2. separating the light excited by the first active laser junction and the light excited by the second active laser junction according to the difference in the properties of the light, and then combining the light according to the difference in the properties of the light.

[0036] In this scheme, the light emitted by the multi-junction chip can be first separated and then combined according to the difference in the properties of the light. After the light excited by the first active laser junction and the light excited by the second active laser junction are combined, the degree of coincidence of the light spots generated by the two light beams is improved, and the dark area is removed, thereby increasing the light brightness per unit area. BRIEF DESCRIPTION OF DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the specific embodiments of the present disclosure or the prior art, the accompanying drawings needed to be used in the description of the specific embodiments or the prior art will be briefly introduced. Obviously, the accompanying drawings in the following description represent some embodiments of the present disclosure. Based on these drawings, other drawings can be obtained by those skilled in the art without any creative effort.

[0038] Fig. 1 is a schematic diagram of a laser provided by an embodiment of the present disclosure;

[0039] Fig. 2 is a front view of the laser provided by an embodiment of the present disclosure;

[0040] Fig. 3 is a top view of the laser provided by an embodiment of the present disclosure;

[0041] Fig. 4 is an optical path diagram of a first light beam of the laser provided by an embodiment of the present disclosure;

[0042] Fig. 5 is an optical path diagram of a second light beam of the laser provided by an embodiment of the present disclosure.

[0043] Fig. 1 is a schematic diagram of a laser provided by an embodiment of the present disclosure;

[0044] 210- first light beam; 220- second light beam;

[0045] 300- beam splitter; 400- collimator; 510- first mirror; 520- translation prism; 530- second mirror; 540- beam combiner. DETAILED DESCRIPTION

[0046] In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions in the embodiments of the present disclosure will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only some of the embodiments of the present disclosure, rather than all the embodiments. The components of the embodiments of the present disclosure described and shown in the accompanying drawings can be arranged and designed in various different configurations.

[0047] Therefore, the detailed description of the embodiments of the present disclosure provided below in the accompanying drawings is not intended to limit the scope of the claimed present disclosure, but only represents selected embodiments of the present disclosure. All other embodiments obtained by those skilled in the art based on the embodiments in the present disclosure without any creative effort are within the scope of protection of the present disclosure.

[0048] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0049] In the description of the present disclosure, it should be pointed out that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly placed when the product of the present disclosure is used, and are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present disclosure. In addition, the terms "first", "second", "third" and the like are only used for differentiation in description and cannot be understood as indicating or implying relative importance.

[0050] In addition, the terms "horizontal", "vertical" and the like do not mean that the components must be absolutely horizontal or vertical, but can be slightly inclined. For example, "horizontal" only means that it is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0051] In the description of the present disclosure, it should also be pointed out that, unless otherwise explicitly specified and limited, the terms "arrangement", "installation", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present disclosure can be understood according to the specific circumstances.

[0052] The multi-junction chip light beam shaping method provided by the present disclosure comprises:

[0053] As shown in FIG. 1, step S1. A multi-junction chip 100 is provided, wherein the number of active laser junctions in the multi-junction chip 100 is greater than or equal to 2. The multi-junction chip 100 comprises at least a first active laser junction 110 and a second active laser junction 120; the properties of the light excited by the first active laser junction 110 and the light excited by the second active laser junction 120 are different, wherein the properties include at least one of polarization mode, wavelength.

[0054] As shown in FIG. 2, taking a double-junction chip as an example, vertically, the double-junction chip has two active laser junctions, namely a first active laser junction 110 and a second active laser junction 120, both of which can emit laser light. However, since the two are arranged at intervals, if the light spots generated by the two are not processed, there will be a dark area between the light spots, resulting in lower brightness per unit area.

[0055] Step S2. The light excited by the first active laser junction 110 and the light excited by the second active laser junction 120 are first separated according to the difference in the properties of the light, and then combined according to the difference in the properties of the light.

[0056] In this scheme, the concept of beam combining is applied to the multi-junction chip 100, and the light beams emitted by the first active laser junction 110 and the second active laser junction 120 are controlled to have different polarizations or different wavelengths, that is, the properties of the light excited by the first active laser junction 110 and the light excited by the second active laser junction 120 are different. For example, in the prior art, the patent with the publication number JPS6123384A and the name "Multi-wavelength semiconductor laser" realizes different light emitting wavelengths, and the patent with the publication number US6876680B2 and the name "Semiconductor laser device, semiconductor laser module, and fiber amplifier" realizes different light emitting polarizations. Then, the polarization beam combining or wavelength beam combining optical path is used for spatial beam combining, and then the combined light can be injected into an optical fiber. After the light excited by the first active laser junction 110 and the light excited by the second active laser junction 120 are combined, the spot coincidence degree of the two is improved, the dark area is removed, and the brightness per unit area is increased.

[0057] The step S2 includes:

[0058] S21. Collimate the light excited by the first active laser junction 110 and the second active laser junction 120 to form a first light beam 210 and a second light beam 220, respectively.

[0059] The light can be collimated by a convex lens, that is, a convex lens is placed behind the multi-junction chip 100, and the optical axis of the convex lens can be arranged between the first active laser junction 110 and the second active laser junction 120; or it can coincide with the optical axis of the first active laser junction 110. In this scheme, the latter is adopted, so that only the second light beam 220 is tilted, and the propagation direction of the first light beam 210 remains unchanged, which is convenient for setting the optical path.

[0060] S22. According to the difference in the properties of the light, the first light beam 210 and the second light beam 220 are emitted to different directions to separate the first light beam 210 and the second light beam 220.

[0061] As shown in FIG. 3, in this embodiment, the first light beam 210 and the second light beam 220 are separated by a corresponding beam splitter 300 according to the difference in polarization or wavelength. Assuming that the polarizations of the first light beam 210 and the second light beam 220 are different, the corresponding beam splitter 300 in the optical path is set as a polarization prism, which is arranged behind the collimating lens 400 and configured as a polarization prism that can transmit the first light beam 210 but reflect the second light beam 220. Therefore, the second light beam 220 propagates in a direction away from the first light beam 210, thereby separating the two in space. The separation is for better setting of the beam combining optical path in the next step. If the first light beam 210 and the second light beam 220 are not separated first, the spatial distance between the two is small, which is not convenient for setting the beam combining module.

[0062] Similarly, when the wavelengths of the first light beam 210 and the second light beam 220 are different, a wavelength selection sheet can be used to transmit the first light beam 210 and reflect the second light beam 220, so as to separate the two.

[0063] In this embodiment, the included angle of the separated first light beam 210 and the second light beam 220 can be 90°. In other implementable schemes, the included angle can also be other angles according to the selection of the beam splitting module.

[0064] S23. Combining the separated first light beam 210 and the second light beam 220 according to the difference in the properties of the light.

[0065] The principle of step S22 is the same, and the first light beam 210 and the second light beam 220 are combined by using a polarization prism or a wavelength selection sheet according to the properties of the first light beam 210 and the second light beam 220.

[0066] Specifically, as shown in FIGS. 4 and 5, the separated first light beam 210 and the second light beam 220 can be combined by a combining module, which specifically includes a first reflecting mirror 510, a translation prism 520, a second reflecting mirror 530, and a combining mirror 540. The first reflecting mirror 510 is arranged behind the reflecting surface of the beam splitting mirror 300 and is configured to receive the reflected second light beam 220 and reflect it to the translation prism 520. By changing the angle of the first reflecting mirror 510, the parallelism of the second light beam 220 and the first light beam 210 is adjusted.

[0067] As shown in FIG. 2, the second light beam 220 is refracted twice in the translation prism 520, which is configured to adjust the first light beam 210 and the second light beam 220 to be in the same vertical position. The vertical direction is the arrangement direction of the first active laser junction 110 and the second active laser junction 120.

[0068] The second reflecting mirror 530 is arranged behind the translation prism and is configured to receive the translated second light beam 220 and reflect it to the combining mirror 540. The combining mirror 540 is the same as the beam splitting mirror 300 in front and is a polarization prism or a wavelength selection sheet.

[0069] The combining mirror 540 receives the first light beam 210 emitted from the beam splitting mirror 300 and the second light beam 220 emitted from the second reflecting mirror 530 and combines the two. The beam splitting mirror 300 and the combining mirror 540 are coaxially arranged, and the reflecting surfaces of the two are at an included angle of 90°. The first light beam 210 is transmitted from the beam splitting mirror 300 and the combining mirror 540, and the optical path thereof is always unchanged.

[0070] In the step S2, the propagation direction of the first light beam 210 is taken as the light-out direction, so that the propagation direction of the collimated first light beam 210 remains unchanged, and the collimated second light beam 220 is arranged at an angle relative to the light-out direction.

[0071] A collimating mirror 400 is arranged behind the multi-junction chip 100. The collimating mirror 400 can be a convex lens, and the optical axis of the convex lens is arranged coaxially with the first active laser junction 110, so that the propagation direction of the collimated first light beam 210 remains unchanged. Only the propagation direction of the second light beam 220 is changed, which facilitates the subsequent arrangement of the optical path.

[0072] The step S22 specifically includes: using the beam splitter 300 to emit the first light beam 210 and the second light beam 220 in different directions to separate the first light beam 210 and the second light beam 220. The step S23 specifically includes: adjusting the first light beam 210 and the second light beam 220 to be parallel and in the same vertical position, wherein the vertical direction is the arrangement direction of the first active laser junction 110 and the second active laser junction 120; and using the beam combiner 540 to combine the first light beam 210 and the second light beam 220. In a first implementable scheme, the polarization modes of the light excited by the first active laser junction 110 and the light excited by the second active laser junction 120 are different, and the beam splitter 300 and the beam combiner 540 are both polarization prisms. In a second implementable scheme, the wavelengths of the light excited by the first active laser junction 110 and the light excited by the second active laser junction 120 are different, and the beam splitter 300 and the beam combiner 540 are both wavelength selection pieces.

[0073] Of course, for a three-junction or four-junction chip, the same beam splitting and combining principles can be used to increase the number of beam splitting and combining modules by one or two levels, so as to increase the unit brightness. Taking a three-junction chip as an example, a first beam splitting module transmits a first light beam generated by a first active laser junction and reflects a second light beam generated by a second active laser junction and a third light beam generated by a third active laser junction. A second beam splitting module is arranged below the first beam splitting module, transmits the second light beam and reflects the third light beam, a second beam combining module combines the second light beam and the third light beam, and a first beam combining module combines the first light beam, the second light beam and the third light beam.

[0074] As shown in FIGS. 1-5, the laser provided by the present disclosure includes a multi-junction chip 100, a beam splitting module and a beam combining module, wherein the number of active laser junctions in the multi-junction chip 100 is greater than or equal to 2. In the present embodiment, a double-junction chip is taken as an example.

[0075] The multi-junction chip 100 comprises a first active laser junction 110 and a second active laser junction 120; the light excited by the first active laser junction 110 and the light excited by the second active laser junction 120 have different properties, wherein the properties comprise at least one of polarization mode and wavelength. In a first embodiment, the polarization of the light excited by the first active laser junction 110 and the light excited by the second active laser junction 120 is different. In a second embodiment, the wavelength of the light excited by the first active laser junction 110 and the light excited by the second active laser junction 120 is different.

[0076] The beam splitting module is configured to separate the light excited by the first active laser junction 110 and the light excited by the second active laser junction 120 according to the difference in the properties of the light.

[0077] The beam combining module is configured to combine the light separated by the beam splitting module according to the difference in the properties of the light.

[0078] In this embodiment, the concept of beam combining is applied to the multi-junction chip 100, and the light beams emitted by the first active laser junction 110 and the second active laser junction 120 are controlled to have different polarization or different wavelength, i.e., the properties of the light excited by the first active laser junction 110 and the light excited by the second active laser junction 120 are different. Then, the light beams are combined by using a polarization beam combining path and a wavelength beam combining path, and then spatially combined, and then the combined light is injected into an optical fiber. After the light excited by the first active laser junction 110 and the light excited by the second active laser junction 120 are combined, the degree of coincidence of the light spots generated by the two light beams is improved, and the dark area is removed, so that the brightness per unit area is increased.

[0079] The beam splitting module comprises a collimating mirror 400 arranged behind the multi-junction chip 100, and the collimating mirror 400 is configured to collimate the light excited by the first active laser junction 110 and the light excited by the second active laser junction 120, and form a first light beam 210 and a second light beam 220, respectively. A convex lens can be used to collimate the light, i.e., a convex lens is placed behind the multi-junction chip 100, and the optical axis of the convex lens can be arranged between the first active laser junction 110 and the second active laser junction 120; or the optical axis of the convex lens can coincide with the optical axis of the first active laser junction 110. In this embodiment, the latter is used, so that only the second light beam 220 is tilted, and the propagation direction of the first light beam 210 is always unchanged, which facilitates the setting of the optical path.

[0080] The beam splitting module further comprises a beam splitter 300 arranged behind the collimating mirror 400 and configured to emit the first light beam 210 and the second light beam 220 in different directions so as to separate the first light beam 210 and the second light beam 220. In this embodiment, the included angle between the separated first light beam 210 and the second light beam 220 can be 90°. In other embodiments, the included angle can be other angles according to the selection of the beam splitting module.

[0081] In this embodiment, the first light beam 210 and the second light beam 220 are separated by the corresponding beam splitter 300 according to the polarization difference or the wavelength difference. Assuming that the first light beam 210 and the second light beam 220 have different polarizations, the corresponding beam splitter 300 in the optical path is arranged as a polarization prism arranged behind the collimating mirror 400 and configured to transmit the first light beam 210 and reflect the second light beam 220. Therefore, the second light beam 220 propagates in a direction away from the first light beam 210, thereby separating the two light beams in space. The separation is for better arrangement of the beam combining optical path in the next step to combine the first light beam 210 and the second light beam 220. If the two light beams are not separated first, the first light beam 210 and the second light beam 220 have a small spatial distance, which is not convenient for arrangement of the beam combining module.

[0082] Similarly, when the first light beam 210 and the second light beam 220 have different wavelengths, a wavelength selection sheet can be used to transmit the first light beam 210 and reflect the second light beam 220, thereby separating the two light beams.

[0083] The beam combining module is arranged behind the beam splitter 300 and configured to combine the separated first light beam 210 and the second light beam 220.

[0084] Optionally, the beam splitter 300 transmits the first light beam 210 and reflects the second light beam 220. The beam combining module comprises a first reflecting mirror 510, a translation prism 520, a second reflecting mirror 530 and a beam combining mirror 540. The first reflecting mirror 510 is arranged behind the reflecting surface of the beam splitter 300 and configured to receive the reflected second light beam 220 and reflect it to the translation prism 520. The translation prism 520 is configured to adjust the first light beam 210 and the second light beam 220 to be in the same vertical position, where the vertical direction is the arrangement direction of the first active laser junction 110 and the second active laser junction 120. The second reflecting mirror 530 is arranged behind the translation prism and configured to receive the translated second light beam 220 and reflect it to the beam combining mirror 540. The beam combining mirror 540 receives the first light beam 210 emitted from the beam splitter 300 and the second light beam 220 emitted from the second reflecting mirror 530 and combines the two light beams.

[0085] The first mirror 510 is arranged behind the reflecting surface of the beam splitter 300, configured to receive the reflected second light beam 220 and reflect it to the translation prism 520. By changing the angle of the first mirror 510, the second light beam 220 is adjusted to be parallel to the first light beam 210. Then, the second light beam 220 is refracted twice in the translation prism 520, which is configured to adjust the first light beam 210 and the second light beam 220 to be in the same vertical position. The vertical direction is the arrangement direction of the first active laser junction 110 and the second active laser junction 120. The second mirror 530 is arranged behind the translation prism, configured to receive the translated second light beam 220 and reflect it to the beam combiner 540. The beam combiner 540 is the same as the beam splitter 300 in front, which is a polarization prism or a wavelength selective sheet. The beam combiner 540 receives the first light beam 210 emitted from the beam splitter 300 and the second light beam 220 emitted from the second mirror 530, and combines them. The beam splitter 300 and the beam combiner 540 are coaxially arranged, and the reflecting surfaces of the two are at a 90-degree angle. The first light beam 210 is transmitted from the beam splitter 300 and the beam combiner 540, and its optical path is always unchanged.

[0086] In the first implementation scheme, the polarization modes of the first light beam 210 and the second light beam 220 are different, and the beam splitter 300 and the beam combiner 540 are both polarization prisms. The first light beam 210 emitted from the collimator 400 is transmitted through the above-mentioned two polarization prisms in turn; the second light beam 220 emitted from the collimator 400 is reflected by the first mirror 510, then passes through the translation prism 520, and is transmitted to the second mirror 530 after the propagation path is translated. The second mirror 530 reflects the second light beam 220 into the beam combiner 540, which reflects the second light beam 220. The first light beam 210 and the second light beam 220 are combined under the action of the beam combiner 540.

[0087] In the second implementation scheme, the wavelengths of the first light beam 210 and the second light beam 220 are different, and the beam splitter 300 and the beam combiner 540 are both wavelength selective sheets. The optical path principle is roughly the same as the first scheme.

[0088] A convex lens can be used to collimate light, i.e. a convex lens is placed behind the multi-junction chip 100. The optical axis of the convex lens can be arranged between the first active laser junction 110 and the second active laser junction 120; or it can coincide with the optical axis of the first active laser junction 110. In this scheme, the latter is adopted. In this way, only the second light beam 220 is tilted, and the propagation direction of the first light beam 210 is always unchanged, which is convenient for setting the optical path.

[0089] It should be finally pointed out that the above embodiments are only used to illustrate the technical solutions of the present disclosure, rather than limit them; although the present disclosure has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present disclosure. Industrial applicability

[0090] The multi-junction chip beam shaping method and the laser of the present disclosure can separate and then combine the light emitted by the multi-junction chip according to the difference in optical properties. After the light excited by the first active laser junction and the second active laser junction is combined, the coincidence degree of the light spots generated by the two is improved, and the dark area is removed, so that the light brightness per unit area is increased.

Claims

1. A multi-junction chip beam shaping method, characterized by, Comprising: Step S1. providing a multi-junction chip (100), the multi-junction chip (100) comprising at least a first active laser junction (110) and a second active laser junction (120); the light excited by the first active laser junction (110) and the light excited by the second active laser junction (120) are different in property, wherein the property comprises at least one of polarization mode, wavelength; Step S2. separating the light excited by the first active laser junction (110) and the light excited by the second active laser junction (120) according to the difference in property of the light, and then combining the light excited by the first active laser junction (110) and the light excited by the second active laser junction (120) according to the difference in property of the light.

2. The multi-junction chip beam shaping method of claim 1, wherein, The step S2 comprises: S21. collimating the light excited by the first active laser junction (110) and the light excited by the second active laser junction (120) to form a first light beam (210) and a second light beam (220) respectively; S22. emitting the first light beam (210) and the second light beam (220) to different directions according to the difference in property of the light, so as to separate the first light beam (210) and the second light beam (220); S23. combining the separated first light beam (210) and second light beam (220) according to the difference in property of the light.

3. The multi-junction chip beam shaping method of claim 2, wherein, In the step S2, the propagation direction of the first light beam (210) is the light emitting direction, so that the propagation direction of the collimated first light beam (210) is unchanged, but the collimated second light beam (220) is arranged at an angle relative to the light emitting direction.

4. The multi-junction chip light beam shaping method according to claim 2, wherein The step S22 specifically comprises: using a beam splitter (300) to emit the first light beam (210) and the second light beam (220) to different directions, so as to separate the first light beam (210) and the second light beam (220); The step S23 specifically comprises: adjusting the first light beam (210) and the second light beam (220) to be parallel and in the same vertical position, wherein the vertical direction is the arrangement direction of the first active laser junction (110) and the second active laser junction (120); and using a beam combiner (540) to combine the first light beam (210) and the second light beam (220); When the polarization modes of the light excited by the first active laser junction (110) and the light excited by the second active laser junction (120) are different, the beam splitter (300) and the beam combiner (540) are both polarization prisms; When the wavelengths of the light excited by the first active laser junction (110) and the light excited by the second active laser junction (120) are different, the beam splitter (300) and the beam combiner (540) are both wavelength selection pieces.

5. The multi-junction chip beam shaping method of claim 2, wherein, In the step S22, the included angle of the separated first light beam (210) and the second light beam (220) is 90°.

6. A laser characterized by, Comprising: a multi-junction chip (100) comprising at least a first active laser junction (110) and a second active laser junction (120); the light excited by the first active laser junction (110) and the light excited by the second active laser junction (120) are different in property, wherein the property comprises at least one of polarization mode, wavelength; a beam splitting module configured to separate the light excited by the first active laser junction (110) and the light excited by the second active laser junction (120) according to a difference in an attribute of the light; a beam combining module configured to combine the light separated by the beam splitting module according to the difference in the attribute of the light.

7. The laser of claim 6, wherein: the beam splitting module comprises: a collimating mirror (400) disposed behind the multi-junction chip (100), the collimating mirror (400) configured to collimate the light excited by the first active laser junction (110) and the light excited by the second active laser junction (120) and form a first light beam (210) and a second light beam (220), respectively; a beam splitting mirror (300) disposed behind the collimating mirror (400) and configured to emit the first light beam (210) and the second light beam (220) in different directions so as to separate the first light beam (210) and the second light beam (220); the beam combining module is disposed behind the beam splitting mirror (300).

8. The laser of claim 7, wherein, the beam splitting mirror (300) transmits the first light beam (210) but reflects the second light beam (220); the beam combining module comprises a first reflecting mirror (510), a translating prism (520), a second reflecting mirror (530), and a beam combining mirror (540), the first reflecting mirror (510) disposed behind a reflecting surface of the beam splitting mirror (300) and configured to receive the reflected second light beam (220) and reflect it toward the translating prism (520), the translating prism (520) configured to adjust the first light beam (210) and the second light beam (220) to be in the same vertical position, the vertical position being a direction in which the first active laser junction (110) and the second active laser junction (120) are arranged, the second reflecting mirror (530) disposed behind the translating prism and configured to receive the translated second light beam (220) and reflect it toward the beam combining mirror (540), and the beam combining mirror (540) configured to receive the first light beam (210) emitted from the beam splitting mirror (300) and the second light beam (220) emitted from the second reflecting mirror (530) and combine the two light beams.

9. The laser of claim 8, wherein, the first light beam (210) and the second light beam (220) have different polarization modes, and the beam splitting mirror (300) and the beam combining mirror (540) are both polarization prisms.

10. The laser of claim 8, wherein, the first light beam (210) and the second light beam (220) have different wavelengths, and the beam splitting mirror (300) and the beam combining mirror (540) are both wavelength selective films.

11. The laser of claim 7, wherein, the collimating mirror (400) is coaxial with the first active laser junction (110).

12. The laser of claim 7, wherein, an optical axis of the collimating mirror (400) is disposed between the first active laser junction (110) and the second active laser junction (120).

13. The laser of claim 7, wherein, the first light beam (210) and the second light beam (220) emitted from the beam splitting mirror (300) have an included angle of 90°.

14. The laser of claim 8, wherein, The second light beam (220) is reflected by the first mirror (510) and exits in parallel with the first light beam (210).

15. The laser of claim 8, wherein, The beam splitter (300) and the beam combiner (540) are coaxially arranged, and the reflecting surfaces of the beam splitter (300) and the beam combiner (540) form a 90° angle.

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