Title :
Actively Q-Switched Multisegmented Nd:YAG Laser Pumped at 885 nm for Remote Sensing
Author :
Evangelatos, Christos ; Tsaknakis, Georgios ; Bakopoulos, Paraskevas ; Papadopoulos, Dimitris ; Avdikos, Georgios ; Papayannis, Alexandros ; Tzeremes, Georgios
Author_Institution :
Dept. of Phys., Nat. Tech. Univ. of Athens, Athens, Greece
Abstract :
An end-pumped actively Q-switched Nd:YAG laser using a multisegmented crystal rod as laser active material, directly pumped to the upper laser level by an 885-nm emitting diode is demonstrated. The Nd:YAG crystal was pumped both in CW and quasi-CW mode. The maximum energy per pulse obtained was 2.57 mJ at 1 kHz, with an overall efficiency of ~ 7.5) %. The pulse duration was 22-ns full-width at half-maximum while the spatial beam profile was excellent (M2<;1.3) .
Keywords :
Q-switching; laser beams; laser modes; neodymium; optical pumping; solid lasers; YAG:Nd; emitting diode; end-pumped actively Q-switched multisegmented Nd:YAG laser; energy 2.57 mJ; frequency 1 kHz; full-width at half-maximum; laser active material; laser level; multisegmented crystal rod; pulse duration; quasiCW mode; remote sensing; spatial beam profile; time 22 ns; wavelength 885 nm; Crystals; Laser beams; Laser excitation; Laser modes; Measurement by laser beam; Pump lasers; Semiconductor lasers; Actively Q-switched; end-pumped; environmental sensing; multi-segment Nd:YAG; upper laser level pumping;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2014.2341656
