Yellow light laser using cascading superlattice as frequency changer crystal

Abstract

The invention provides a yellow light laser using a cascading superlattice as frequency changer crystal. The laser comprises a pumping light source, a resonant cavity formed by front and back cavity mirrors, a temperature control furnace and a two-segment cascading optical superlattice, wherein the cascading optical superlattice is used as the non-linear frequency changer crystal; and the light emitted by the pumping light source enters the resonant cavity and then passes the cascading optical superlattice, and finally the yellow light, of which the wavelength is 590nm, is outputted from the back cavity mirror. The first-segment structure of the cascading superlattice is used for realizing an oscillatory process of light parameters, and the second-segment structure of the cascading superlattice is used for generating the double frequency yellow light. The yellow light laser has the advantages that: the design is flexible; both the cascading periodic structure and the pseudo periodic, aperiodic or double periodic structure can be used to simultaneously realize the phase matching of two non-linear processes; a plurality of structures can be integrated on one chip, the structure is compact; the integrated property of the system is improved; the broad tuning yellow light output is realized; and the laser output is stably achieved, and the highly efficient and stable full solid-state yellow light laser is realized.

Description

technical field [0001] The invention relates to a device for realizing the cascade frequency doubling process of optical parametric oscillation by using a cascaded optical superlattice to obtain a laser output in the visible light band, especially an all-solid-state yellow light that uses a superlattice such as lithium tantalate as a frequency conversion crystal. The laser is a yellow laser with a cascaded superlattice as a frequency conversion crystal. Background technique [0002] Lasers in the yellow light spectral band are widely used in laser display, chemistry, biomedicine, space target detection and recognition, etc. For example, in biomedicine, because hemoglobin has a strong absorption of yellow light, yellow laser can be used In ophthalmology and dermatology; in astronomy, it can replace the traditional sodium guide signal light source in astronomical telescopes; in military, it can be used in the detection and identification of space targets. In the early days, i...

AI Technical Summary

Problems solved by technology

[0009] The problems to be solved by the present invention are: the existing yellow light laser has complex structure, is not conducive to integration, requires high working conditions, unstable yellow light output, low efficiency, and the yellow light wavelength tuning range produced is small

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