School of Optoelectronics, Beijing Institute of Technology, Beijing 100081, China
Frontiers of Optoelectronics
2009, 2(4): 410
Author Affiliations
Abstract
Department of Opto-Electronics Engineering, Beijing Institute of Technology, Beijing 100081
A high-repetition-rate eye-safe optical parametric oscillator (OPO), using a non-critically phase-matched KTP crystal intracavity pumped by a passively Q-switched Nd:GdVO4/Cr4+:YAG laser, is experimentally demonstrated. The conversion efficiency for the average power is 7% from pump diode input to OPO signal output and the slope efficiency is up to 10.3%. With an incident pump power of 7.3 W, the compact intracavity OPO (IOPO) cavity, operating at 15 kHz, produces an average power of 0.57 W at 1570 nm with a pulse width as short as 6 ns. The peak power at 1570 nm is higher than 6.3 kW.
人眼安全激光 被动调Q光学参量振荡器 190.4970 Parametric oscillators and amplifiers 140.3540 Lasers, Q-switched Chinese Optics Letters
2008, 6(2): 02127
Author Affiliations
Abstract
Department of Opto-Electronics Engineering, Beijing Institute of Technology, Beijing 100081
The twisted Laguerre-Gaussian beam was generated by transforming of Hermite-Gaussian beams through an optical system consisting of three rotated cylindrical lenses. The intensity distribution and phase structure of the twisted hollow beam were theoretically analyzed by using Collins diffraction integral. By utilizing the method of mode decomposition, the theory of transformation was analyzed. In the experiment, micro particles were trapped and rotated by this twisted beam.
激光光学 扭转对称光束 轨道角动量 光束变换 140.3460 Lasers 260.2110 Electromagnetic optics 140.3300 Laser beam shaping Chinese Optics Letters
2007, 5(2): 89
