Open AccessTunable UV source based on an LED-pumped cavity-dumped Cr:LiSAF laser
Author(s) -
Pierre Pichon,
Hussein Taleb,
Frédéric Druon,
Jean-Philippe Blanchot,
Patrick Georges,
François Balembois
Publication year - 2019
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.27.023446
Subject(s) - materials science , optics , laser , spectral width , optoelectronics , diode , pulse duration , pulse width modulation , wavelength , power (physics) , physics , quantum mechanics
We developed a light-emitting diode (LED)-pumped Cr:LiSAF laser operating in Q-switched and cavity-dumped regimes. The laser produces 1.1 mJ pulses with a pulse duration of 8.5 ns at a repetition rate of 10 Hz on a broad spectrum centered at 840 nm with a full width at half maximum of 23 nm. After frequency tripling in two cascaded LBO crystals, we obtained 7 ns pulses with an energy of 13 µJ at 280 nm and with a spectral width of 0.5 nm, limited by the spectral acceptance of the phase matching process. By rotating both LBO crystals, UV emission is tuned from 276 nm to 284 nm taking advantage of the broad infrared spectrum of the Cr:LiSAF laser.