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CN-224233132-U - Gradual change Vcsel laser

CN224233132UCN 224233132 UCN224233132 UCN 224233132UCN-224233132-U

Abstract

A gradual change Vcsel laser is characterized in that an anode bonding pad is arranged on the outer side of the upper surface, an array luminous hole is arranged in the central area, a cathode bonding pad is arranged at the bottom, the diameters of the luminous holes are gradually changed along at least one direction, and the directions are perpendicular to the light emitting direction. According to the utility model, the diameters of the luminous holes are arranged in a gradual change way along a specific direction, so that the far-field distribution of light beams is effectively optimized, the near-distance exposure is avoided during oblique incidence, the far-distance brightness is higher, the light energy utilization rate is improved, and the application requirement of a high-requirement scene is met.

Inventors

  • HUANG RUIBIN
  • LV FANGLU
  • ZHU LI
  • WANG BO

Assignees

  • 深圳市光鉴科技有限公司
  • 重庆光鉴傲深科技有限公司

Dates

Publication Date
20260512
Application Date
20250611

Claims (10)

  1. 1. A gradual change Vcsel laser is characterized in that the outer side of the upper surface is provided with an anode bonding pad, the central area is provided with an array luminous hole, and the bottom is provided with a cathode bonding pad; The diameter of the luminous holes is gradually arranged along at least one direction, and the direction is perpendicular to the light emitting direction.
  2. 2. A graded Vcsel laser as in claim 1 wherein the number of light emitting holes is not less than 100.
  3. 3. A graded Vcsel laser as claimed in claim 1 wherein the diameter of the light emitting aperture is between 3 μm and 20 μm.
  4. 4. A graded Vcsel laser as in claim 1 wherein the diameters of the light emitting holes are arranged in a graded fashion in two mutually perpendicular directions, and the difference in diameters of adjacent light emitting holes in each direction remains constant.
  5. 5. A graded Vcsel laser as in claim 1 wherein the light emitting holes are circular holes and the centers of all light emitting holes are on the same plane.
  6. 6. A graded Vcsel laser as in claim 1 wherein the diameter of the light emitting holes increases or decreases gradually in a linear fashion along the graded direction and the distance between the centers of adjacent light emitting holes is positively correlated with the amount of diameter change.
  7. 7. A graded Vcsel laser as claimed in claim 1 wherein the diameter of the light emitting holes is graded in such a way that the beam output from the laser has a specific divergence angle in the far field distribution, the divergence angle being related to the gradient of the diameter of the light emitting holes, and the beam divergence angle being adjustable by adjusting the gradient of the diameter of the light emitting holes to vary in the range of 10 ° -30 °.
  8. 8. The gradual change Vcsel laser according to claim 1, wherein the light emitting hole is electrically connected to the anode pad by a conductive lead wire, the conductive lead wire is made by a gold wire bonding process, and the cathode pad is electrically connected to the electrode layer at the bottom of the laser by welding.
  9. 9. A graded Vcsel laser as in claim 1 wherein the anode pad material is a combination of one or more metals from the group consisting of gold, titanium, and platinum.
  10. 10. The graded Vcsel laser of claim 1, wherein the anode pad and the cathode pad are each provided with a conductive structure for enhancing current distribution uniformity, and the conductive structure is one or a combination of a plurality of conductive lines, conductive grids, or conductive bumps.

Description

Gradual change Vcsel laser Technical Field The utility model relates to the technical field of Vcsel lasers, in particular to a gradual change Vcsel laser. Background Vertical Cavity Surface Emitting Lasers (VCSELs) are widely used in the fields of optical communication, optical interconnection, 3D sensing and the like due to the advantages of compact structure, low power consumption, easiness in integration and the like. However, in the conventional VCSEL array, the sizes of the light emitting units are consistent, far field distribution of the emitted light beams has a multi-lobe structure, the quality of the light beams is poor, the energy distribution is dispersed, long-distance transmission and efficient coupling are not facilitated, and the application of the VCSEL array in the scenes with strict requirements on the quality and the energy concentration of the light beams such as high-speed optical communication and high-resolution laser radar is greatly limited. Meanwhile, with the continuous improvement of the performance requirements of the VCSEL in application scenes, the requirements of single-mode output and low-divergence-angle light beams are more urgent. Conventional uniformly sized VCSEL arrays are difficult to meet such demands through simple structural optimization, and development of new structural designs to improve beam characteristics thereof is desired. Under the background, a VCSEL laser which enables the diameter of a light emitting hole to be arranged gradually along a specific direction through special design is researched and developed, so that a beam mode is regulated and controlled, far-field distribution is optimized, when oblique incidence is carried out, the near-distance exposure is avoided, the far-distance brightness is higher, the light energy utilization rate is improved, the application requirement of a high-requirement scene is met, and the VCSEL laser has important practical significance and application value. The foregoing background is only for the purpose of providing an understanding of the inventive concepts and technical aspects of the present utility model and is not necessarily prior art to the present application and is not intended to be used as an aid in the evaluation of the novelty and creativity of the present utility model in the event that no clear evidence indicates that such is already disclosed at the date of filing of the present application. Disclosure of utility model Therefore, the light-emitting holes are arranged in a gradual change way along a specific direction, so that the far-field distribution of light beams is effectively optimized, the near-distance exposure is avoided when oblique incidence is performed, the far-distance brightness is higher, the light energy utilization rate is improved, and the application requirement of high-requirement scenes is met. The utility model provides a gradual change Vcsel laser which is characterized in that the outer side of the upper surface is provided with an anode bonding pad, the central area is provided with an array luminous hole, and the bottom is provided with a cathode bonding pad; The diameter of the luminous holes is gradually arranged along at least one direction, and the direction is perpendicular to the light emitting direction. Optionally, the graded Vcsel laser is characterized in that the number of the luminous holes is not less than 100. Optionally, the graded Vcsel laser is characterized in that the diameter of the light emitting hole is between 3 μm and 20 μm. Optionally, the gradient Vcsel laser is characterized in that the diameters of the light emitting holes are arranged in a gradient manner along two mutually perpendicular directions, and the diameter difference of the adjacent light emitting holes in each direction is kept constant. Optionally, the gradual change Vcsel laser is characterized in that the luminous holes are circular holes, and the circle centers of all the luminous holes are located on the same plane. Optionally, the diameter of the light emitting hole of the gradient Vcsel laser is gradually increased or decreased along the gradient direction according to a linear rule, and the distance between the centers of adjacent light emitting holes is in positive correlation with the diameter variation. Optionally, the gradual change Vcsel laser is characterized in that the diameter gradual change arrangement of the light emitting holes enables the light beam output by the laser to have a specific divergence angle on far field distribution, the divergence angle is related to the gradient of the gradual change of the diameter of the light emitting holes, and the divergence angle of the light beam can be adjusted to be changed within a range of 10-30 degrees by adjusting the gradient of the gradual change of the diameter of the light emitting holes. Optionally, the gradual change Vcsel laser is characterized in that the luminous hole is electrically connected with the anod