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Continuously-tuning full solid state ultraviolet laser

An ultraviolet laser, all-solid-state technology, used in lasers, laser parts, phonon exciters, etc., can solve problems such as complex procedures and affect the efficiency of instrument use, and achieve the effect of continuous tuning output

Inactive Publication Date: 2008-02-27
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the output mirror needs to be replaced, the laser resonator needs to be readjusted; in addition, there are overlaps between the different output bands, that is, some wavelengths output in the previous band will appear in the next band, so the laser operates Not only the procedure is complicated, but also seriously affects the efficiency of the instrument

Method used

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  • Continuously-tuning full solid state ultraviolet laser

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The coating bandwidth used in this embodiment is 100nm; the 532nm quasi-continuous Nd:YAG laser pumped by LD is used as the pumping source to pump the titanium sapphire solid-state laser; the tunable output of the fundamental frequency of 700-900nm is realized by tuning through a prism; and The continuously adjustable violet laser output with a wavelength of 350-450nm is realized by means of frequency conversion. The specific content is as follows:

[0024] 1) Use the 532nm quasi-continuous Nd:YAG 1b laser pumped by the existing LD (wavelength 808nm) as the pump source, and its maximum output average power can reach 25W; use the acousto-optic modulator 1c for frequency adjustment, and the modulation frequency is 5KHz . In order to improve the beam quality of 532nm to improve the pumping efficiency, a plano-convex unstable cavity structure is adopted in the experiment—the total reflection mirror (1a) is a plano-convex lens (R=600) coated with a 1.06um total reflection f...

Embodiment 2

[0029] The main difference between this embodiment and Embodiment 1 is that the polished surface of the output mirror 6 is divided into three parts along the X-axis and coated separately, which can realize continuous tuning output of 600-900 nm. The specific coating method is: from left to right along the X-axis, three types of film systems with a bandwidth of 100nm are plated sequentially—600-700nm, 700-800nm ​​and 800-900nm. The left third of the polished surface of the output mirror 6 is coated with a partial reflection film of 600-700nm, the transmittance at 700nm is T=8%, and the transmittance decreases by 0.2% every 10nm, then the transmittance at 600nm is T=6 %. The middle third of the output mirror 6 is coated with a partial reflection film of 700-800nm, the transmittance at 700nm is T=8%, and the transmittance at 10nm increases by 1%, then the transmittance at 800nm ​​is T=18%. The remaining one-third of the right side is coated with 800-900nm partial reflection film...

Embodiment 3

[0031] The main difference between this embodiment and Embodiment 1 is that the polished surface of the output mirror 6 is divided into four parts along the X-axis and coated separately, which can realize continuous tuning output of 600-1000 nm. The specific coating method is: from left to right along the X axis, four film systems with a bandwidth of 100nm are plated sequentially—600-700nm, 700-800nm, 800-900nm and 900-1000nm. A quarter of the polished surface of the output mirror 6 is coated with a partial reflection film of 600-700nm, the transmittance at 700nm is T=8%, and the transmittance decreases by 0.2% every 10nm, then the transmittance at 600nm is T=6%; A quarter of the output mirror 6 is coated with a partial reflection film of 700-800nm, the transmittance of 700nm is T=8%, and the transmittance of 10nm increases by 1%, then the transmittance of 800nm ​​is T=18%; One of them is coated with a partial reflection film of 800-900nm, the transmittance at 800nm ​​is T=18%...

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Abstract

This invention relates to a laser device, particularly the full solid-state ultraviolet laser device realizing continuous tunable output. This invention solves the problems of prior art products that different bands of output lenses are needed for alternation, to realize tunable laser output of broadband (the range being greater than 200nm) laser, need of readjusting cavity structure, and presence of crossed-overlapping between different wave-bands of output. This inventive technical scheme is : the polished surface of the output lens (6) of the laser device is separated into two parts, three parts and four parts along its X-axis, and being coated separately. So, the turning of total reflection mirror is needed only to realize tunable broadband laser output, needing no readjusting of resonant cavity, and so to realize tunable ultraviolet laser output by frequency-doubling.

Description

technical field [0001] The invention relates to a laser device, in particular to an all-solid-state ultraviolet laser that can realize continuous tuning output. It belongs to the field of optoelectronics and laser. Background technique [0002] All-solid-state tunable lasers have important applications in many fields due to their small size, high power, and tunable wavelength. Ti:Sapphire laser has attracted much attention because of its wide gain curve (660nm~1100nm). However, in previous experimental studies, in order to obtain tunable laser output with a tuning range greater than 200nm, the method of switching to different output mirrors is generally adopted, that is, to output light of different wavelength bands, it is necessary to switch to output mirrors of different wavelength bands. For example, to obtain tunable output between 700-1000nm, two output mirrors of 700-850nm and 850-1000nm need to be used to obtain tunable output of 700-850nm and 850-1000nm respectivel...

Claims

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Application Information

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IPC IPC(8): H01S3/08H01S3/105
Inventor 李港李平雪陈檬黄道波张大鹏颜凡江庞庆生
Owner BEIJING UNIV OF TECH
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