A simple pulsed CO2 laser with long milliseconds pulse duration

被引:14
作者
Chung, HJ [1 ]
Lee, DH [1 ]
Hong, JH [1 ]
Joung, JH [1 ]
Sung, YM [1 ]
Park, SJ [1 ]
Kim, HJ [1 ]
机构
[1] Pusan Natl Univ, Dept Elect Engn, Pusan 609735, South Korea
关键词
D O I
10.1063/1.1431255
中图分类号
TH7 [仪器、仪表];
学科分类号
0804 ; 080401 ; 081102 ;
摘要
We demonstrate a simple pulsed CO2 laser with long pulse duration of millisecond order in a tube at a low pressure of less than 30 Torr. The power supply for our laser system switches the voltage of the ac power line (60 Hz) directly. The power supply does not need elements such as a rectifier bridge, energy-storage capacitors, or a current-limiting resistor in the discharge circuit. In order to control the laser output power, the pulse repetition rate is adjusted up to 60 Hz and the firing angle of the silicon controlled rectifier (SCR) gate is varied from 30degrees to 150degrees. The maximum laser output of 35 W is obtained at a total pressure of 18 Torr, a pulse repetition rate of 60 Hz, and a SCR gate firing angle of 90degrees. In addition, the resulting laser pulse width is approximately 3 ms (full width at half maximum). This is a relatively long pulse width, compared with other repetitively pulsed CO2 lasers. (C) 2002 American Institute of Physics.
引用
收藏
页码:484 / 485
页数:2
相关论文
共 6 条
[1]   SIMPLE LONGITUDINALLY PULSED CO2-LASER AND ITS APPLICATION IN SINGLE-MODE OPERATION OF TEA LASERS [J].
LOY, MMT ;
ROLAND, PA .
REVIEW OF SCIENTIFIC INSTRUMENTS, 1977, 48 (05) :554-556
[2]   DEVELOPMENT OF A HIGH-REPETITION-RATE MINI-TEA CO2-LASER [J].
MENYUK, N ;
MOULTON, PF .
REVIEW OF SCIENTIFIC INSTRUMENTS, 1980, 51 (02) :216-220
[3]   HIGH REPETITION RATE MINI TEA CO2-LASER USING A SEMICONDUCTOR PRE-IONIZER [J].
RICKWOOD, KR ;
MCINNES, J .
REVIEW OF SCIENTIFIC INSTRUMENTS, 1982, 53 (11) :1667-1669
[4]  
Ross EV, 1996, LASER SURG MED, V19, P123
[5]   PULSED CO2-LASER TISSUE ABLATION - MEASUREMENT OF THE ABLATION RATE [J].
WALSH, JT ;
DEUTSCH, TF .
LASERS IN SURGERY AND MEDICINE, 1988, 8 (03) :264-275
[6]  
Wildi T., 1997, ELECT MACHINES DRIVE