Solid-state laser of human eye safety output

Abstract

The invention relates to a solid-state laser of human eye safety output. The laser comprises a LD pumping source 2, a gain medium and a plane-concave cavity. The LD pumping source 2 is side pumping. The gain medium is Er: glass crystal 3. The plane-concave cavity is formed by a reflecting mirror 1 and an output coupling mirror 5. The reflecting mirror 1 is a concave mirror. The output coupling mirror 5 is a plane mirror. The plane-concave cavity is located on an output light path of the side pumping. The gain medium is located in the plane-concave cavity. A passively q-switching switch is arranged in the plane-concave cavity. A Q switch 4 is located between the gain medium and the output coupling mirror 5. The structure is compact, miniaturization is realized and usage is simple and convenient. The laser is harmless to human eyes and usage is safe, and the laser can be applied in multiple fields. High peak power and single pulse base model output are realized. An atmospheric transmission distance is long so that long-distance range finding, monitoring and the like can be realized. An energy utilization rate is high.

Description

technical field [0001] The invention relates to a solid-state laser, in particular to a solid-state laser with safe output for human eyes. Background technique [0002] At present, the 1.06um wavelength rangefinder has the risk of blinding the human eye, while the 1.54um wavelength is a safe wavelength for the human eye, and it is in the atmospheric transmission window of 1.5-1.8um. ​​The atmospheric transmission performance is good, and it has a high reflection coefficient for the target. Smoke, fog, and battlefield smoke all have strong penetrating capabilities, which have great advantages in long-range laser weapons and equipment. [0003] Currently, there are direct output technology, stimulated Raman scattering technology (Stimulated Raman Scattering, referred to as SRS) and optical parametric oscillation technology (Optical Parametric Oscillators, referred to as OPO) to produce 1.5xum human eye harmless laser technology. [0004] SRS technology is based on the Raman s...

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Problems solved by technology

[0008] Chinese patent application number 201520146656.4 discloses a flat-cavity passive Q-switched laser. The laser includes a pumping system, a collimating mirror, a focusing mirror, and a resonant cavity optically coupled with the pumping system in sequence. The resonating cavity starts from the side of the focusing mirror. , including an optically coupled reflector, a gain component, a passive Q-switched crystal, and an output mirror in turn. The output mirror is coupled with a nonlinear crystal. The pumping system includes a pump source, a driving source for powering the pump source, a reflector, At least one of the output mirrors is a concave mirror, and the radius of curvature of the concave surface ranges from 50mm to 1000mm; the laser structure is relatively complex, and the wavelength is not safe for human eyes, and it is not a single pulse output

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