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High-power VCSEL for vehicle-mounted radar and preparation method thereof

A vehicle-mounted radar and high-power technology, applied to the structure of the active area, laser components, electrical components, etc., can solve problems such as failure to meet market requirements, difficulty in achieving high power, and space hole burning, and achieve room for improvement Hole burning phenomenon, reduction of internal loss and absorption, effect of increasing population inversion

Active Publication Date: 2021-04-30
南昌凯捷半导体科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0014] 1. The power is low, only limited to a few watts, and it is difficult to achieve high power in the same area;
[0015] 2. The gain is relatively low and cannot meet the current market requirements;
[0016] 3. The phenomenon of hole burning in space is serious;
[0017] 4. High-order modes are difficult to control

Method used

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  • High-power VCSEL for vehicle-mounted radar and preparation method thereof
  • High-power VCSEL for vehicle-mounted radar and preparation method thereof
  • High-power VCSEL for vehicle-mounted radar and preparation method thereof

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Embodiment Construction

[0056] The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. The following description of at least one exemplary embodiment is merely illustrative in nature and in no way serves as any limitation of the application, its application or uses. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.

[0057] In the description of this application, it should be understood that the use of words such as "first" and "second" to define parts is only for the convenience of distinguishing corresponding parts. Therefore, it should not be construed as a limitation of the protection scope of this application.

[0058] I...

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Abstract

The invention provides a high-power VCSEL for a vehicle-mounted radar and a preparation method of the high-power VCSEL. The high-power VCSEL comprises a GaAs substrate, a GaAs buffer layer, an N-type DBR layer, five active layers, an oxide layer, a P-type DBR layer and a P-type GaAs layer which sequentially grow along the growth direction, and the total cavity length of the VCSEL is integral multiples of the lengths of the five cavities. According to the invention, five active layers are connected in series by using a tunneling junction, and the power in a unit area is improved by designing a specific cavity length, so that higher power is realized; meanwhile, by designing different barrier heights, the carrier moving distance is solved, the radiation recombination probability is improved, the population inversion is increased, and the output power is improved; through the design of the growth thickness, the gain is improved, a standing wave field is improved, and the output power is improved.

Description

technical field [0001] The invention relates to the technical field of semiconductor lasers, in particular to a high-power VCSEL for vehicle-mounted radar and a preparation method thereof. Background technique [0002] Vertical-cavity surface-emitting lasers (VCSELs) have been used in data communications for more than two decades, but there are many emerging application requirements that are driving the volume production and performance improvement of VCSELs. These applications include, but are not limited to, face recognition, gesture recognition, proximity sensing, high-resolution video displays, automotive lidar, infrared lighting, infrared heating, atomic clocks. [0003] At present, single-junction VCSELs are widely used in mobile phones, which can only realize distance tests of tens of meters, and it is difficult to meet long-distance tests and cannot meet the needs of vehicle radar. Therefore, in order to achieve long-distance testing, it is particularly important to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S5/187H01S5/32H01S5/323H01S5/343H01S5/42
CPCH01S5/187H01S5/3205H01S5/323H01S5/343H01S5/34326H01S5/34333H01S5/426H01S2304/04
Inventor 林晓珊吴春寿宁如光杨祺王苏杰陈振宇潘彬王向武
Owner 南昌凯捷半导体科技有限公司
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