Laser based on cascade effect of bulk laser self-variable-frequency material

A cascade effect, self-conversion technology, applied in lasers, laser parts, phonon exciters, etc., can solve the problems of low stability and complex structure of ultraviolet solid-state lasers, and achieve low production cost, compact structure, composite functional effect

Inactive Publication Date: 2011-10-12
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] Aiming at the problems of complex structure and low stability of current ultraviolet solid-state laser

Method used

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  • Laser based on cascade effect of bulk laser self-variable-frequency material
  • Laser based on cascade effect of bulk laser self-variable-frequency material
  • Laser based on cascade effect of bulk laser self-variable-frequency material

Examples

Experimental program
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Effect test

Embodiment 1

[0035] see figure 1 , figure 2 In this embodiment, a solid-state laser based on the cascade effect of Nd:YCOB self-converting crystal is produced. The fundamental frequency light is 1060nm. The intracavity laser propagates along the "V" shape in the crystal, and the triple frequency light exits at the output mirror B. Achieve 354nm ultraviolet laser output.

[0036] Substrate 3-1 is a hafnium dioxide (HfO 2 ) material, the size of the substrate is equal to the size of the third optical surface 1-3 of the Nd:YCOB self-converting crystal. The cooling and temperature control device 4-1 is placed on the above-mentioned substrate 3-1, and the cooling and temperature control device 4-1 adopts a conventional crystal cooling and temperature control device purchased in the market.

[0037] The pumping source 5-1 adopts a pumping source with a center wavelength near 811 nm, which is a semiconductor laser in this embodiment.

[0038] Block laser self-converting material 2-1 adopts N...

Embodiment 2

[0050] The specific structure of this embodiment refers to Figure 5 ; In this embodiment, a solid-state laser (1.3 μm fundamental frequency self-tripling solid-state laser) is produced based on the laser self-frequency conversion crystal Nd:YCOB cascade effect. This embodiment is similar to Embodiment 1. The intracavity laser propagates along a "V" shape in the crystal, and the frequency tripled light emerges from the B terminal of the output mirror to achieve 443.3nm laser output.

[0051] The difference with embodiment 1 is mainly:

[0052] 1. The wavelength of the fundamental frequency light is the 1.3μm center output wavelength of the Nd:YCOB self-converting material.

[0053] 2. The cavity film of the resonant cavity is changed, and the first optical surface 1-1 of the self-converting crystal is coated with a high-reflection film for 1.3μm fundamental frequency light and 443.3nm triple frequency light (reflectivity is greater than 90%), and 665.5nm frequency double ligh...

Embodiment 3

[0059] The specific structure reference of this embodiment Figure 6 ; This embodiment makes a solid-state ultraviolet laser based on the laser frequency conversion crystal Nd:GdCOB cascade effect. This embodiment is similar to Embodiment 1. The intracavity laser propagates along a "V" shape in the crystal. The main differences from Embodiment 1 are:

[0060] 1. Nd:GdCOB crystal with a doping concentration of 8at.% is used as the self-converting material. The crystal cutting and manufacturing method is similar to that of Example 1. The fundamental frequency light is the 1061nm central radiation wavelength of the Nd:GdCOB crystal.

[0061] 2. The frequency-doubled light 7-2 exits from the mirror of the laser resonator A, and the frequency-tripled light 7-3 exits from the laser resonator B, realizing dual-wavelength output of 530.5nm frequency-doubled light and 354nm ultraviolet laser.

[0062] 3. The pumping method is changed to double-end pumping of the self-variable crystal,...

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Abstract

The invention discloses a laser based on the cascade effect of a bulk laser self-variable-frequency material. The laser comprises a pumping source, a laser resonant cavity and a bulk laser self-variable-frequency material, wherein the laser resonant cavity consists of a laser resonant cavity mirror A and a laser resonant cavity mirror B; the bulk laser self-variable-frequency material at least comprises three optical surfaces; a first optical surface and a second optical surface are respectively vertical to a fundamental frequency light and multiple frequency phase matching direction (theta1,phi1) and a fundamental frequency light, frequency doubled light and frequency phase matching direction (theta2, phi2) in which the self-variable-frequency material has the maximum nonlinear coefficient; a third optical surface is vertical to a bisector for the phase matching directions (theta1, phi1) and (theta2, phi2); the pumping source is used for pumping at least one surface of the self-variable-frequency material; a high-transmittivity film system is arranged at a position from which pumping light enters; fundamental frequency light produces frequency doubled light along the phase matching direction (theta1, phi1); and the fundamental frequency light and the frequency doubled light are transmitted in a V form in the self-variable-frequency material and produce sum frequency light (triple frequency light) along the phase matching direction (theta2, phi2). In the laser, multiple functions such as basic frequency laser resonance, frequency doubling and frequency summing are realized by using a self-variable-frequency material. The laser has a strong composite function, a compact structure, high stability and low manufacturing cost.

Description

technical field [0001] The invention relates to the field of all solid-state lasers, in particular to a laser based on the cascade effect of bulk laser self-variable frequency materials. Background technique [0002] Due to its short wavelength and high photon energy, ultraviolet laser has important applications in device processing, biomedicine, and data storage. In the field of device processing, compared with infrared light with longer wavelength, ultraviolet laser has special advantages: First, infrared light or visible light is usually processed by generating local heat to melt or vaporize the device, which will cause the processed area Severe damage to surrounding structures, thus limiting device edge strength and the ability to produce fine features. UV laser processing directly breaks the chemical bonds connecting the atoms of the substance to separate the substance into particles without heating the processing area. Secondly, some materials such as glass and cryst...

Claims

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Application Information

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IPC IPC(8): H01S3/16H01S3/108H01S3/109
Inventor 宗楠申玉许祖彦韩琳王保山彭钦军王继扬张怀金于浩海王正平蒋民华
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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