Title :
Experimental investigation of nonlinear frequency conversion in pure SiO2-core monomode optical fibers pumped at 1.319 μm: single pass and oscillators
Author :
Vermelho, M.V.D. ; Hickmann, J.Miguel ; Gouveia, E.A. ; Gouveia-Neto, A.S.
Author_Institution :
Dept. de Fisica, Alagoas Univ., Maceio, Brazil
fDate :
8/1/1995 12:00:00 AM
Abstract :
Generation of intense visible picosecond pulses in the spectral region of 580-610 nm through efficient nonlinear frequency conversion of 1.319 μm Nd:YAG Q-switched and mode-locked laser pulses in pure SiO 2-core single mode optical fibers was experimentally investigated. Peak powers of ten´s of watts in single-pass arrangement and over 100 W in synchronously pumped amplifier/oscillators were obtained. The LP02 mode signal light generated exhibits threshold power, critical fiber length, and an asymmetrical spectrum of a few nanometers. A phase-matched four-wave mixing process involving two photons around 800 nm and one photon around 1.4 μm was responsible for the visible light generation. Varying the test fiber minimum dispersion wavelength, the four-wave mixing signal wavelength is shifted within the region of 580-610 nm
Keywords :
Q-switching; high-speed optical techniques; laser beams; laser mode locking; laser modes; multiwave mixing; neodymium; optical fibre dispersion; optical fibres; optical frequency conversion; optical pumping; silicon compounds; solid lasers; 1.319 mum; 1.4 mum; 100 W; 580 to 610 nm; 800 nm; LP02 mode; Nd:YAG Q-switched laser pulses; SiO2; YAG:Nd; YAl5O12:Nd; asymmetrical spectrum; critical fiber length; four-wave mixing signal wavelength; intense visible picosecond pulse generation; mode-locked laser pulses; nonlinear frequency conversion; oscillators; peak powers; phase-matched four-wave mixing process; pure SiO2-core monomode optical fibers; pure SiO2-core single mode optical fibers; signal light generation; single pass; single-pass arrangement; spectral region; synchronously pumped amplifier/oscillators; test fiber minimum dispersion wavelength; threshold power; visible light generation; Fiber lasers; Four-wave mixing; Frequency conversion; Laser mode locking; Optical amplifiers; Optical fiber testing; Optical fibers; Optical pulse generation; Pulse amplifiers; Pump lasers;
Journal_Title :
Quantum Electronics, IEEE Journal of
