Title :
Generation of picosecond blue light pulse by frequency doubling of gain-switched GaAlAs laser diode having saturable absorber
Author :
Ohya, Jun ; Tohmon, Genji ; Yamamoto, Kazuhisa ; Taniuchi, Tetsuo ; Kume, Masahiro
Author_Institution :
Matsushita Electr. Ind. Co., Osaka, Japan
fDate :
8/1/1991 12:00:00 AM
Abstract :
Picosecond pulse generation of blue light by frequency doubling of a GaAlAs laser diode is reported. High power pulse generation is realized by incorporating gain switching of a laser diode with a saturable absorber and frequency doubling in a proton-exchanged MgO:LiNbO3 waveguide. The laser diode with a longer saturable absorber can produce optical pulses with higher peak power and narrower pulse width. The spectral bandwidth of second-harmonic generation for the waveguide is evaluated at about 20 nm. This is wide enough to frequency-double all the multilongitudinal modes of the gain-switched laser diode. A blue light pulse of 7.88-mW maximum peak power and 28.7-ps pulsewidth is obtained for a 1.23-W peak pulse of the laser diode
Keywords :
III-V semiconductors; aluminium compounds; gallium arsenide; high-speed optical techniques; integrated optics; laser beams; lithium compounds; magnesium compounds; optical harmonic generation; optical saturable absorption; optical waveguides; semiconductor junction lasers; 1.23 W; 28.7 ps; 7.88 mW; GaAlAs laser diode; LiNbO3:MgO planar optical waveguides; frequency doubling; gain switching; multilongitudinal modes; narrower pulse width; optical pulses; peak power; picosecond blue light pulse; proton-exchanged; pulse generation; second-harmonic generation; spectral bandwidth; Diode lasers; Free electron lasers; Frequency; Optical harmonic generation; Optical pulse generation; Optical pulses; Optical waveguides; Pulse generation; Pulse measurements; Space vector pulse width modulation;
Journal_Title :
Quantum Electronics, IEEE Journal of
