Frequency Doubled Pulsed Single Longitudinal Mode Nd:YAG Laser at 1319 nm with Pulse Buildup Negative Feedback Controls

摘要

We report on creation of frequency doubled E-O Q-switched Nd: YAG laser lasing Single Longitudinal and Transversal mode radiation at 1319 nm (~4F_(3/2) to ~4I_(11/12) transition) at repetition rate of 10 Hz. By means of linear resonator stable red-light pulses were obtained at 660 nm having Emax = 5mJ output energy and x = 50 ns (FWHM) pulse duration by using NCPM LBO crystal as an extra-cavity frequency doubler. Laser design incorporates particularly made fast negative feedback loop controls for pulse buildup control. It allowed obtaining much more stable laser performance as well as much shorter Optical Jitter and fast pulse buildup time. To best our knowledge, these are the first time such pulse energy, rep rate Transversal and Longitudinal mode structure ever achieved in compact flashlamp pumped E-0 Q-Switched laser operating at 1319 nm.