Effects of second harmonic generation （SHG） and cascaded second harmonic generation/difference frequency generation（cSHG/DFG） based on the quasi-phase-matching （QPM） condition in periodically poled lithium nioba...Effects of second harmonic generation （SHG） and cascaded second harmonic generation/difference frequency generation（cSHG/DFG） based on the quasi-phase-matching （QPM） condition in periodically poled lithium niobate （PPLN） waveguide were investigated experimentally. SHG conversion efficiency of -13.6dB and QPM bandwidth of 0.45nm were achieved using a 16.1dBm power of fundamental wave at 1550.4nm. Using pulsed all-fiber passive mode locked laser and tunable continuous wave laser, cSHG/DFG effect utilized for optical sampling was observed. Conversion efficiencies were calculated, and 11.88nm-wide QPM bandwidth was achieved through changing the wavelength of input signal. Conversion efficiency of cSHG/DFG effect increased linearly with the total injected power.展开更多
Prof.Chen Yiyu,NSFC President met with Prof.Matthias Kleiner,DFG President and DFG delegation on Oct.31. In a cozy and friendly atmosphere,both sides briefed each other about the latest development in NSFC and DFG,and...Prof.Chen Yiyu,NSFC President met with Prof.Matthias Kleiner,DFG President and DFG delegation on Oct.31. In a cozy and friendly atmosphere,both sides briefed each other about the latest development in NSFC and DFG,and exchanged views on the Excellent Initiative Program of DFG,the preparatory work of the Global Research Council,as well as the NSFC-DFG joint research projects approved in 2012.Both sides expressed satisfaction about the development of bilateral relations and confidence in future cooperation.展开更多
At the invitation of NSFC, the DFG delegation, led by its President Prof. Ernst-Ludwig Winnacker, paid a visit to China from Apr. 9 to 19, 2005. Members of the delegation include Prof. Frank Steglich, Vice President o...At the invitation of NSFC, the DFG delegation, led by its President Prof. Ernst-Ludwig Winnacker, paid a visit to China from Apr. 9 to 19, 2005. Members of the delegation include Prof. Frank Steglich, Vice President of DFG and Dr. Axel-Hubertus Zienicke, the Deputy Secretary General, etc.展开更多
On Apr. 11, Prof. Chen Yiyu, on behalf of NSFC, signed the “Agreement between NSFC and DFG on support of Sino-German joint interdisciplinary research programs （SG-JIRP）”with visiting Prof. Winnacker, President of ...On Apr. 11, Prof. Chen Yiyu, on behalf of NSFC, signed the “Agreement between NSFC and DFG on support of Sino-German joint interdisciplinary research programs （SG-JIRP）”with visiting Prof. Winnacker, President of DFG.. The agreement aims to encourage scientists from both countries to undertake ambitious long- term research at an international level, promote interdisciplinary research and foster young researchers. It will serve as a platform for joint interdisciplinary research. Groups of researchers at a limited number of research institutions, based at one principal location in China and one principal location in Germany, can combine their expertise, agree on a common research topic, identify common research goals and submit joint proposals to NSFC and DFG for funding. Within the spheres of competence, NSFC and DFG will take joint responsibility for decision on the proposals based on strict international evaluation.展开更多
On May 31,2013,Prof.Yang Wei,President of National Natural Science Foundation of China(NSFC)met with Prof.Peter Strohschneider,President of German Research Foundation(DFG).Both sides briefed each other the latest deve...On May 31,2013,Prof.Yang Wei,President of National Natural Science Foundation of China(NSFC)met with Prof.Peter Strohschneider,President of German Research Foundation(DFG).Both sides briefed each other the latest development in NSFC and DFG and reviewed the NSFC-DFG cooperation and achievements in the past years.Both Prof.Yang and Prof.Strohschneider highly praised the development of bilateral relations and expressed the willingness and confidence in strengthening展开更多
基金Supported by the National Natural Science Foundation of China(6077702460978007)
文摘Effects of second harmonic generation （SHG） and cascaded second harmonic generation/difference frequency generation（cSHG/DFG） based on the quasi-phase-matching （QPM） condition in periodically poled lithium niobate （PPLN） waveguide were investigated experimentally. SHG conversion efficiency of -13.6dB and QPM bandwidth of 0.45nm were achieved using a 16.1dBm power of fundamental wave at 1550.4nm. Using pulsed all-fiber passive mode locked laser and tunable continuous wave laser, cSHG/DFG effect utilized for optical sampling was observed. Conversion efficiencies were calculated, and 11.88nm-wide QPM bandwidth was achieved through changing the wavelength of input signal. Conversion efficiency of cSHG/DFG effect increased linearly with the total injected power.
文摘Prof.Chen Yiyu,NSFC President met with Prof.Matthias Kleiner,DFG President and DFG delegation on Oct.31. In a cozy and friendly atmosphere,both sides briefed each other about the latest development in NSFC and DFG,and exchanged views on the Excellent Initiative Program of DFG,the preparatory work of the Global Research Council,as well as the NSFC-DFG joint research projects approved in 2012.Both sides expressed satisfaction about the development of bilateral relations and confidence in future cooperation.
文摘At the invitation of NSFC, the DFG delegation, led by its President Prof. Ernst-Ludwig Winnacker, paid a visit to China from Apr. 9 to 19, 2005. Members of the delegation include Prof. Frank Steglich, Vice President of DFG and Dr. Axel-Hubertus Zienicke, the Deputy Secretary General, etc.
文摘On Apr. 11, Prof. Chen Yiyu, on behalf of NSFC, signed the “Agreement between NSFC and DFG on support of Sino-German joint interdisciplinary research programs （SG-JIRP）”with visiting Prof. Winnacker, President of DFG.. The agreement aims to encourage scientists from both countries to undertake ambitious long- term research at an international level, promote interdisciplinary research and foster young researchers. It will serve as a platform for joint interdisciplinary research. Groups of researchers at a limited number of research institutions, based at one principal location in China and one principal location in Germany, can combine their expertise, agree on a common research topic, identify common research goals and submit joint proposals to NSFC and DFG for funding. Within the spheres of competence, NSFC and DFG will take joint responsibility for decision on the proposals based on strict international evaluation.
文摘On May 31,2013,Prof.Yang Wei,President of National Natural Science Foundation of China(NSFC)met with Prof.Peter Strohschneider,President of German Research Foundation(DFG).Both sides briefed each other the latest development in NSFC and DFG and reviewed the NSFC-DFG cooperation and achievements in the past years.Both Prof.Yang and Prof.Strohschneider highly praised the development of bilateral relations and expressed the willingness and confidence in strengthening
