Dysprosium and terbium co-doped scandium-containing garnet laser crystal and its preparation method and application of ld pumping the crystal to realize yellow laser output

Abstract

The present invention discloses dysprosium and terbium co-doped scandium-containing garnet laser crystal and its preparation method and the application of LD pumping the crystal to realize yellow laser output. The crystal chemical expression is Dy x Tb y A 3‑x‑ y sc 2 B 3 o 12 ; Prepare Dy by solid-phase method or liquid-phase method x Tb y A 3‑x‑ y sc 2 B 3 o 12 Polycrystalline raw material, after which Dy is grown by melt method x Tb y A 3‑x‑y sc 2 B 3 o 12 Single crystal; using GaN LD as pumping light source, pumping Dy x Tb y A 3‑x‑y sc 2 B 3 o 12 Crystal realizes yellow laser output. In the present invention, dysprosium and terbium are used as active ions, and Dy 3+ with Tb 3+ Resonant energy transfer between the Dy 3+ lower laser level 6 h 13 / 2 Particles on Tb are transferred to Tb by 3+ ion 7 f 4 energy level, so that Dy 3+ It is easier to achieve particle number inversion and reduce the threshold of yellow laser; use scandium-containing garnet laser crystal as the host crystal, so that Dy 3+ It is easy to realize the inverse number of particles, and the crystal has high thermal conductivity, which can endure due to the Dy 3+ The lower absorption and emission cross-sections necessitate the use of high pump powers resulting in waste heat problems.

Description

technical field [0001] The invention relates to the technical field of laser crystals, in particular to a dysprosium and terbium co-doped scandium-containing garnet laser crystal, a preparation method thereof, and an application of LD pumping the crystal to realize yellow laser output. Background technique [0002] The yellow laser with a wavelength of 550-600nm belongs to the most sensitive wavelength band of the human eye, so it has important applications in the fields of laser display and laser lighting, especially for space measurement and indication in heavy fog environments. In addition, yellow laser is widely used in many fields, such as the treatment of skin and eye diseases, the detection and identification of space targets, photoelectric countermeasures, high-density information storage, ocean detection and other industrial, national defense and scientific research fields. . At present, there are three main ways to realize yellow laser: dye laser, dual wavelength ...

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Problems solved by technology

[0004] The single-doped Dy pumped by GaN blue light LD has been reported so far 3+ Laser crystals have fewer crystals that obtain yellow laser output, mainly Dy:YAG, because Dy 3+ Particles with lower stimulated emission cross-sections and lower laser energy levels cannot relax rapidly to the ground state, resulting in high laser threshold

Furthermore, the vast majority of Dy 3+ Doped yellow laser crystals have low thermal conductivity and are unbearable due to Dy 3+ Low absorption and emission cross sections necessitate high pump power waste heat issues

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