Miniaturized human eye safety pulse laser

Abstract

The invention discloses a miniaturized human eye safety pulse laser. The pulse laser comprises a laser diode, a shaping coupling system, a resonant cavity, an optical window sheet and a shell; the laser diode emits pump light with the central wavelength of 940-980 nm, or 1.47 [mu]m, or 1.53 [mu]m, and the divergent pump light enters the resonant cavity after passing through the shaping coupling system; the shaping coupling system consists of two convex lenses and is used for realizing collimation and size adjustment of the pump light beam; the resonant cavity is used for generating pulse humaneye safety laser with the wavelength of 1.6 [mu]m; the optical window sheet is a laser-emitting window, and the surface of the window is plated with an antireflection film with the wave band of 1.6 [mu]m; and the shell is made of a metal material, and the laser diode, the shaping coupling system, the resonant cavity and the optical window sheet are all fixed on the shell. A new technical means for realizing high-peak-power and high-energy giant pulse output with low pumping power is adopted, and the whole laser is compact in design structure, stable, durable, miniature, convenient to carry and applicable to various scenes.

Description

technical field [0001] The invention relates to the field of pulse lasers, in particular to a miniaturized human eye-safe pulse laser. Background technique [0002] The human eye is extremely sensitive to light reception. It is composed of different refractive media and photoreceptors, which can radiate light of a certain frequency to the lens and image it on the retina. The refractive medium in the eyeball has a strong focusing effect, which can converge the incident light into a small spot, so that the light energy received by the retina per unit area is more than 100,000 times higher than the light energy incident on the cornea, so the high Lasers with high power density are very easy to cause huge damage to human eyes in an instant, so the research on lasers in human eye-safe bands is very meaningful. [0003] The refractive medium of the human eye has different transmittance and absorption characteristics for light of different frequencies: each component of the refrac...

AI Technical Summary

Problems solved by technology

[0003] The refractive medium of the human eye has different transmittance and absorption characteristics for light of different frequencies: each component of the refractive medium has different absorption rates for near-ultraviolet light with a wavelength of 300-380nm, which is easy to damage the human eye. The visible light in the 380-780nm band and the near-infrared light in the 780-1400nm wavelength are mainly absorbed by the lens, which is easy to cause damage to the retina and cause radiation cataract; while the laser light in the band below 300nm and above 2100nm is harmful to the The damage threshold of the human eye is very high, and almost all of them are absorbed by the cornea, which can easily cause diseases such as electro-optic ophthalmia

Images