Method for two-step excitation of continuous-wave ultraviolet laser
An ultraviolet laser, laser technology, applied in the field of lasers, can solve the problems of poor laser beam quality, unable to meet the requirements of medical level use, etc., and achieve the effect of good stability and high beam quality
Active Publication Date: 2016-12-07
HEILONGJIANG INST OF TECH
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[0004] The purpose of the present invention is to provide a two-step method for exciting a continuous wave ultraviolet laser, aiming to solve the problem that the quality of the laser beam output by the diode laser is poor and cannot meet the requirements of a higher medical level.
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[0017] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0018] Attached below figure 1 The application principle of the two-step method for exciting a continuous wave ultraviolet laser of the present invention will be further described in specific embodiments.
[0019] The frequency-doubled laser 1 with an output wavelength of 532nm outputs laser light which is collimated by the collimating mirror 2 and becomes parallel light. After the parallel light passes through the focusing mirror 3, the Er:YAP crystal 4 includes two Er:YAlO 3 crystal, this parallel light (pump light) is focused to Er:YAlO 3 Er:YAlO on the side of the crystal close to the focusing mirror 3 3 At the cente...
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The invention discloses a method for two-step excitation of a continuous-wave ultraviolet laser. Output laser light of a frequency-doubled laser of which the output wavelength is 532nm is collimated through a collimating lens and then becomes parallel light; the parallel light is focused to the center of the end surface of Er:YAlO3 crystal at one side, close to a focusing lens, of Er:YAP crystal through the focusing lens; Er<3+> in the Er:YAlO3 crystal absorbs pump light and the Er<3+> in a ground state <4>I15 / 2 energy level in the Er:YAlO3 crystal is excited to reach a <2>H11 / 2 energy level; the Er<3+> in the <2>H11 / 2 energy level absorbs the pump light and transits into a <2>P3 / 2 energy level; and population inversion and 320nm up-conversion laser light output are achieved through Er<3+> accumulation in the <2>P3 / 2 energy level along with an increase of the Er<3+> in the <2>P3 / 2 energy level. The output laser light beam is high in quality, the efficiency is relatively high, the laser light is tunable and the stability is good.
Description
technical field [0001] The invention belongs to the technical field of lasers, in particular to a two-step method for exciting a continuous wave ultraviolet laser. Background technique [0002] Ultraviolet band lasers are widely used in optical data storage, photolithography, optical disc control, micromachining, atmospheric detection, microelectronics, photochemistry, photobiology, and medical treatment. Among them, the ultraviolet continuous laser is the main light source in the treatment of skin diseases, sterilization and antivirus, ore identification, etc., and the 320nm ultraviolet continuous laser is the main light source in the treatment of skin diseases (treatment of psoriasis and other skin diseases). [0003] Diode laser: This laser can directly realize continuous laser output in the visible light band, but the quality of the output laser beam is poor, and it cannot meet the use requirements of a higher medical level. Contents of the invention [0004] The purp...
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IPC IPC(8): H01S3/0941H01S3/08H01S3/16A61N5/067
Inventor 李林军杨曦凝白云峰
Owner HEILONGJIANG INST OF TECH