Full solid-state laser for integrated laser diode intracavity pump

A laser diode and all-solid-state technology, applied in lasers, laser components, laser components, etc., can solve the problems of bulky solid-state lasers, low electro-optical conversion efficiency, and inability to meet energy conservation, and achieve high-efficiency beam quality and electro-optic conversion Efficiency improvement, increased stability and reliability effects

Inactive Publication Date: 2010-10-06
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Traditionally, all solid-state lasers pumped by laser diodes adopt a discrete structure. Laser diodes (or laser diode arrays) form a module, including laser chips, heat sinks, electrodes, and optical alignment systems, while solid-state The laser is mainly composed of a laser active medium and constitutes a module, including crystal (or optical fiber), cooling system, optical system, Q-switching and mode-locking system and mechanical structure, etc., resulting in bulky solid-state lasers and low electro-optic conversion efficiency , unable to meet the needs of modern applications for unit power-to-weight ratio (that is, the laser weight required to obtain 1 watt laser output) and energy saving, so that the use range of all-solid-state lasers can only be limited to relatively traditional industrial applications, and cannot be widely used in In increasingly important industries such as fine machining, aerospace and hand-held processing equipment

Method used

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  • Full solid-state laser for integrated laser diode intracavity pump
  • Full solid-state laser for integrated laser diode intracavity pump
  • Full solid-state laser for integrated laser diode intracavity pump

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Such as image 3 As shown, the laser medium 106 is made of Nd:YAG crystal strip 301. The size of the crystal strip 301 is 1 mm thick, 8 mm wide, and 10 mm long. The doping concentration of Nd ions is 1%. On one end face of the crystal strip 301 116 is coated with a reflective film with a reflectivity greater than 99.7% to a wavelength of 1064nm, and the other end face 114 of the crystal slat 301 is coated with a partial reflective film with a reflectivity of 75% to a wavelength of 1064nm. An anti-reflection film with an emissivity of less than 0.2% to 808nm is coated, and a total reflection film with an emissivity of more than 99.7% to 808nm is coated on the other side 115 of the crystal slat 301 . The laser diode chip 104 is a chip with an AsGaAl multilayer quantum well structure. The working center wavelength of the laser diode chip is 808nm, the width of the light-emitting area is 0.2mm, and the distance between the light-emitting areas is 0.5mm. A total of 19 light-...

Embodiment 2

[0026] Such as Figure 4 As shown, the laser medium 106 in Embodiment 2 is made up of an optical fiber array 403, and the optical fiber array 403 is formed by side-by-side fusion splicing of four ytterbium-doped double-clad silica fibers with the outer cladding removed. The inner cladding diameter of the optical fiber is 500 microns, and the numerical aperture of the inner cladding is is 0.46, the core diameter of the ytterbium-doped double-clad fiber is 20 microns, the numerical aperture is 0.07, and the doping concentration of trivalent ytterbium ions in the core is 4000ppm. 4 double-clad silica fibers form a tapered fiber waveguide light cone by the method of parallel melting and tapering. When a 1.7V, 16A current is applied between the anode 107 and the cathode 109, the test result is that the laser of this embodiment The output power is 12W, the output wavelength is 1100nm, and the electro-optical conversion efficiency is 44%.

Embodiment 3

[0028] Multiple modules are connected in series to obtain higher power output. Such as Figure 5 As shown, in this embodiment, three optical fiber modules 501 are connected in series by means of optical fiber fusion. The structure of the optical fiber module 501 is as follows Figure 4 shown. The core diameter of the fiber at the fiber fusion point 502 is consistent with the numerical aperture, and the insertion loss is less than 0.1 dB. The output power of each module is 12W, the total output power of 3 modules connected in series is 36W, and the electro-optic conversion efficiency is still 44%.

[0029] In summary, the present invention is an integrated, miniature, high-efficiency and high-beam-quality high-power output all-solid-state laser. It greatly reduces the unit power-to-weight ratio of the current laser diode-pumped all-solid-state laser, and at the same time the electro-optic conversion efficiency has been greatly improved. Compared with the traditional all-soli...

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Abstract

The invention relates to a full solid-state laser for an integrated laser diode intracavity pump, which is characterized in that a laser diode chip, a micro-optics shaper and a solid laser medium are sequentially integrated between an upper heat sink and a lower heat sink; a laser diode resonant cavity is formed on the back end surface of a total reflection film plated on the laser diode chip for the pump light and the left side face of a total reflection film plated on the solid laser medium for the pump light; an antireflection film is respectively plated on the natural surfaces among the laser diode chip, the micro-optics shaper and the solid laser medium; resonant cavity lenses at the two ends of the solid laser medium form a resonant cavity of the solid laser; and the anode and the cathode of the laser diode chip are respectively led out from the lower heat sink and the upper heat sink. The invention greatly reduces the unit power weight ratio of the full solid-state laser, increases the electronic-optic conversion efficiency of the full solid-state laser to over 35 percent, has the expansibility that a plurality of modules are connected in series, and ensures large-scale standard production.

Description

technical field [0001] The invention relates to an all-solid-state laser, in particular to an all-solid-state laser pumped in the cavity of an integrated laser diode. Background technique [0002] Traditionally, all solid-state lasers pumped by laser diodes adopt a discrete structure. Laser diodes (or laser diode arrays) form a module, including laser chips, heat sinks, electrodes, and optical alignment systems, while solid-state The laser is mainly composed of a laser active medium and constitutes a module, including crystal (or optical fiber), cooling system, optical system, Q-switching and mode-locking system and mechanical structure, etc., resulting in bulky solid-state lasers and low electro-optic conversion efficiency , unable to meet the needs of modern applications for unit power-to-weight ratio (that is, the laser weight required to obtain 1 watt laser output) and energy saving, so that the use range of all-solid-state lasers can only be limited to relatively tradit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/16H01S3/0941H01S3/06H01S3/04
Inventor 徐剑秋陈凡
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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