Title :
Blue Light Generation of Strongly Focused Gaussian Beams by Frequency Doubling of Nd:GSAG Laser
Author :
Wang, X. ; Kallmeyer, Frank ; Wang, S. ; Eichler, Hans J. ; Ding, Adalbert M G ; Zhang, Zhiguo
Author_Institution :
Inst. fur Opt. und Atomare Phys., Tech. Univ. Berlin, Berlin
fDate :
7/1/2009 12:00:00 AM
Abstract :
Frequency doubling of a focused Gaussian beam involves phase mismatching due to beam divergence. The conversion efficiency was calculated by integration second-harmonic (SH) field along the energy flow propagation path. The resulting SH field spatial distribution was discussed. We demonstrated the generation of blue light in critically type-I phase-matched LiB3O5 by frequency doubling of a diode-pumped electrooptic Q -switched Nd:GSAG laser at room temperature. Pulsed blue light with 8-mJ energy and 300-ns pulse duration at 471 nm was generated with 19-mJ incident radiation at 10 Hz. The maximum conversion efficiency was 42%. The experimental results agree well with our calculations.
Keywords :
Q-switching; electro-optical devices; gadolinium compounds; integrated optics; laser beams; lithium compounds; neodymium; optical harmonic generation; optical phase matching; optical pulse generation; scandium compounds; solid lasers; Gd3Sc2Ga3O12:Nd; LiB3O5; blue light generation; diode-pumped electrooptic Q-switched laser; efficiency 42 percent; energy 8 mJ; focused Gaussian beam; frequency 10 Hz; integration second-harmonic generation; laser frequency doubling; phase mismatching; pulse generation; temperature 293 K to 298 K; time 300 ns; type-I phase-matching; wavelength 471 nm; Diodes; Frequency; Laser beams; Laser excitation; Laser transitions; Microchip lasers; Optical pulses; Pulse modulation; Pump lasers; Temperature; Focusing Gaussian beam; high energy; second-harmonic generation (SHG);
Journal_Title :
Quantum Electronics, IEEE Journal of
DOI :
10.1109/JQE.2009.2013207
