Open AccessLaser induced visible and infrared emission of a tungsten filament
Author(s) -
W. Stręk,
Mariusz Stefański,
Taras Hanulia,
Robert Tomala,
P. Wiewiórski
Publication year - 2021
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.433852
Subject(s) - tungsten , infrared , materials science , laser , optics , protein filament , visible spectrum , electric field , ionization , atomic physics , optoelectronics , physics , ion , quantum mechanics , metallurgy , composite material
The measurements of laser induced emission (LIE) of a tungsten filament upon irradiation with the focused beam of a CW IR laser diode are reported. It was found that the emission occurred in visible and infrared range. The influence of the applied DC electric field significantly affected the intensity of LIE of the tungsten filament. The origin of LIE is discussed in terms of multiphoton ionization of tungsten W + atoms assisted by light emission due to the intervalence charge transfer in the tungsten hybrid domain (W, W + ).