Author Affiliations
Abstract
1 Institute of Photonics and Photon-Technology, National Key Laboratory of Photoelectric Technology and Functional Materials (Culture Base), Northwest University, Xi’an 710069, China
2 Shaanxi Engineering Technology Research Center for Solid State Lasers and Application, Xi’an 710069, China
We report a double Q-switched 946 nm laser with a magnesium-oxide-doped LiNbO3 (MgO:LN) electro-optic (EO) crystal and a monolayer molybdenum diselenide (MoSe2) saturable absorber (SA). A pulsed laser diode side-pumped long neodymium-doped yttrium aluminum garnet rod (φ3×65 mm) is used as the gain medium. Large pulse energy up to 3.15 mJ and peak power up to 346 kW are generated at the repetition rate of 550 Hz, corresponding to the beam quality factors of Mx2=3.849, My2=3.868. Monolayer MoSe2 nanosheets applied in the experiment would be a promising SA for a passive Q-switching operation.
140.3580 Lasers, solid-state 140.3540 Lasers, Q-switched 160.4236 Nanomaterials Chinese Optics Letters
2018, 16(3): 031402
Yang Bai 1,2,3,†Bing Bai 1,2,3Diao Li 1,2,3Yanxiao Sun 1,2,3[ ... ]Jintao Bai 1,2,3
Author Affiliations
Abstract
1 National Key Laboratory of Photoelectric Technology and Functional Materials (Culture Base), Institute of Photonics and Photon-Technology, Northwest University, Xi’an 710069, China
2 Shaanxi Engineering Technology Research Center for Solid State Lasers and Application, Xi’an 710069, China
3 Provincial Key Laboratory of Photo-electronic Technology, Institute of Photonics and Photon-Technology, Northwest University, Xi’an 710069, China
We report a cavity-dumped 1123 nm laser with narrow pulse width and high peak power by an MgO: LN crystal electro-optic (EO) modulator. Based on the structural optimization design of a folded biconcave cavity using the 808 nm pulsed laser diode (LD) side-pumped ceramic Nd: YAG rod, output pulses with maximum pulse energy and peak power up to 39.6 mJ and 9.73 MW were obtained, corresponding to 100 Hz repetition rate and 4.07 ns pulse width. The instabilities of pulse width and pulse energy were $\pm$1.55% and $\pm$2.06%, respectively. At the highest repetition rate of 1 kHz, the pulse energy, pulse width, and peak power were 11.3 mJ, 5.05 ns, and 2.24 MW, respectively. The instabilities of pulse width and pulse energy were $\pm$2.65% and $\pm$3.47%, respectively.
cavity-dumped high peak power MgO: LN EO 1123?nm laser short pulse width High Power Laser Science and Engineering
2018, 6(1): 010000e4
1 西北大学 光子学与光子技术研究所, 陕西 西安 710069
2 陕西省全固态激光及应用工程技术研究中心, 陕西 西安 710069
3 西安重装渭南光电科技有限公司, 陕西 渭南 714000
介绍了基于复合腔结构的全固态波长可调谐的连续橙红色激光的输出特性。该复合腔由一个使用周期极化晶体MgO∶PPLN的信号光单谐振光参量振荡器和一个LD侧面泵浦Nd∶GdVO4晶体的1 062.9 nm基频光谐振腔构成。s-偏振1 062.9 nm泵浦光抽运单谐振光参量振荡器产生s-偏振信号光腔内独立振荡。通过复合腔结构的优化设计, 使独立振荡的p-偏振1 062.9 nm基频光与s-偏振信号光在2个子腔的重叠区内通过II类角度匹配KTP晶体的腔内和频过程获得橙红色激光。当MgO∶PPLN晶体的调谐温度从30 ℃ 上升至 200 ℃时, s-偏振信号光的中心波长产生红移, 导致其与p-偏振1 062.9 nm基频光和频产生的橙红色激光的中心波长从620.2 nm 红移至 628.9 nm。同时测得中红外波段闲频光的中心波长从3 714.2 nm蓝移至3 438.3 nm。在30 ℃最低设定温度时,中心波长620.2 nm 的橙红色激光和中心波长3 714.2 nm的闲频光最大连续输出功率分别达到2.0 W和2.9 W。
橙红色激光 波长可调谐 温度调谐 复合谐振腔 和频 orange-red laser wavelength tunable temperature tuning composite cavity sum frequency generation(SFG)
