Title :
Passively Q-switched Nd:YAG microchip laser emits radially and azimuthally polarized light
Author :
Li, Jian-lang ; Ueda, Ken-ichi ; Shirakawa, Akira ; Zhong, Lan-xiang
Author_Institution :
Shanghai Inst. of Opt. & Fine Mech., Chinese Acad. of Sci., Shanghai, China
Abstract :
In this paper a LD end-pumped Nd:YAG ceramic microchip laser passively Q-switched by Cr4+:YAG absorber is demonstrated to generate axisymmetrically polarized pulse. The reason to employ the end-pumped microchip laser lies in the fact that such cavity configuration is beneficial carrier both for producing energetic Q-switched pulse and also the axisymmetrical polarization. The Cr4+:YAG crystal absorber has an initial transmission of 95% and was antireflection-coated at both sides. A photonic crystal grating (PCG) was deployed as an output coupler to force radial- or azimuthal-polarization oscillation. The length of laser was 5.5 cm, and the distance between the grating and the absorber was 5 mm.
Keywords :
Q-switching; antireflection coatings; chromium; diffraction gratings; laser beams; laser cavity resonators; microchip lasers; optical pulse generation; photonic crystals; ytterbium; LD end-pumped microchip laser; YAG:Cr4+; YAG:Nd; antireflection-coating; azimuthally polarized light; crystal absorber; distance 5 mm; passively Q-switched microchip laser; photonic crystal grating; size 5.5 cm; Gratings; Laser excitation; Laser modes; Laser theory; Microchip lasers; Optical polarization; Optical pulses; Power lasers; Pump lasers; Surface emitting lasers;
Conference_Titel :
Lasers and Electro-Optics 2009 and the European Quantum Electronics Conference. CLEO Europe - EQEC 2009. European Conference on
Conference_Location :
Munich
Print_ISBN :
978-1-4244-4079-5
Electronic_ISBN :
978-1-4244-4080-1
DOI :
10.1109/CLEOE-EQEC.2009.5192901
