Laser, lidar including same, and method for generating laser

Abstract

The invention relates to a diode-pumped solid-state laser using a blue laser diode as a pump light source, which takes Cr-doped fluoroaluminate as a gain medium and can obtain 850nm laser output suitable for a laser radar. Due to the advantages of the blue laser diode in the aspects of light beam quality and power, the structure of the pumping system can be simplified, and the overall structure of the solid laser is further simplified; due to the advantages of the blue laser diode in the aspects of temperature range and temperature excursion, the solid laser is slightly influenced by the temperature excursion movement of the wavelength of the pump light, is high in reliability and is suitable for vehicle-gauge-level application. The microchip structure of the fixed heat-conducting transparent material is beneficial to reducing the influence of the pumping heat effect, and higher laser output can be obtained under higher pumping power.

Description

technical field [0001] The present invention generally relates to the field of optoelectronic technology, and in particular to a laser, a lidar including the laser and a method for generating laser. Background technique [0002] As a new type of laser, diode-pumped solid-state laser (DPSSL) has developed rapidly in recent years. Compared with traditional lamp-pumped solid-state lasers, DPSSL replaces the flash lamp with laser diodes of specific wavelengths, achieving higher light-to-light conversion efficiency, longer working time and small size. At present, many types of diode-pumped solid-state lasers have been commercialized and are widely used in laser ranging and industrial processing. [0003] Passive Q-switching is a way for solid-state lasers to generate pulsed laser light. The Q value of a resonant cavity is defined as the ratio of the total energy stored to the energy lost per unit time in the cavity. The Q value in the cavity is adjusted by changing the loss in...

AI Technical Summary

Problems solved by technology

[0004] Existing diode-pumped solid-state lasers mostly use red laser diodes as the pumping light source, but due to the low power of a single red laser diode, multiple laser diodes are usually combined for pumping, and the pumping system is relatively complicated; The central wavelength of optical laser diodes drifts with temperature, and its operating temperature is generally limited to 0°C to 50°C, and its application scenarios are also limited (for example, lidar is used in the field of automatic driving, and the temperature range of the car regulation is -40°C to 120°C )

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