Laser Hazard Analysis for Ultra-Fast Sub-Nanosecond, Mode-Locked Near Infrared Lasers Operated with Pulse Repetition Frequencies Above the Critical Frequency

AUGUSTONI, ARNOLD L.

Sandia National Laboratories

关键词: Wavelengths;    Safety Analysis;    61 Radiation Protection And Dosimetry;    Lasers;    Critical Frequency;   

DOI  :  10.2172/809628
RP-ID  :  SAND2003-1005
RP-ID  :  AC04-94AL85000
RP-ID  :  809628

美国|英语

来源: UNT Digital Library

【 摘 要 】

Ultra fast, sub-nanosecond (picosecond to femtosecond) duration, laser pulses present unique challenges when performing laser safety analysis involving mode-locked lasers, which operate at pulse repetition frequencies above the critical frequency in the near infrared wavelength bands. Two specific cases are presented, one such case that agrees and one that disagrees with the general rule on critical frequency. The results show that in all cases the appropriate maximum permissible exposure is always the smallest of the values calculated from ANSI rule 1, 2 and 3.