We report a monolithic integrated dual-wavelength laser diode based on a distributed Bragg reflector （DBR） composite resonant cavity. The device consists of three sections, a DBR grating section, a passive phase sec...We report a monolithic integrated dual-wavelength laser diode based on a distributed Bragg reflector （DBR） composite resonant cavity. The device consists of three sections, a DBR grating section, a passive phase section, and an active gain section. The gain section facet is cleaved to work as a laser cavity mirror. The other laser mirror is the DBR grating, which also functions as a wavelength filter and can control the number of wavelengths involved in the laser action. The reflection bandwidth of the DBR grating is fabricated to have an appropriate value to make the device work at the dual-wavelength lasing state. We adopt the quantum well intermixing （QWI） technique to provide low-absorption loss grating and passive phase section in the fabrication process. By tuning the injection currents on the DBR and the gain sections, the device can generate 0.596 nm-spaced dual-wavelength lasing at room temperature.展开更多
The cross-correlation method for temporal characterization is investigated using simulations of the two- color above threshold ionization （ATI） on He induced by a vacuum ultraviolet （VUV） free-electron laser （FEL...The cross-correlation method for temporal characterization is investigated using simulations of the two- color above threshold ionization （ATI） on He induced by a vacuum ultraviolet （VUV） free-electron laser （FEL） in the presence of an infrared （IR） field. Non-linear dependencies of the sideband structure pro- duced in the two-color ATI process are expressed as a function of IR laser intensity by considering the spatial distributions and temporal jitter of both lasers. The temporal properties of the FEL pulse can be characterized accurately using the cross-correlation method at a low IR laser intensity of ~3~101~ W/cm2 but with low cross-correlation signals. When the dynamic range of sidebands is increased to high IR intensity, the accuracy of the cross-correlation method becomes crucially dependent on the actual non- linear index. An approach of determining this index is proposed here to improve the accuracy of temporal characterizations.展开更多
“响应型材料与器件集成”国际联合实验室（英文：Joint Research Lab of Device Integrated Responsive Materials,简称DIRM）是华南师范大学与荷兰埃因霍温理工大学（Eindhoven University of Technology ） ,在汇聚双方功能材料与集...“响应型材料与器件集成”国际联合实验室（英文：Joint Research Lab of Device Integrated Responsive Materials,简称DIRM）是华南师范大学与荷兰埃因霍温理工大学（Eindhoven University of Technology ） ,在汇聚双方功能材料与集成器件领域的顶尖人才和技术基础上共同创立的，其目的是促进两校乃至两国间的科技交流与合作、实现资源共享、搭建学术研究与创新成果产业化之间的桥梁．DIRM的成立，标志着华南师范大学在高端人才引进和国际化创新平台建设方面取得又一重大突破．DIRM的职责和功能主要在以下几点．展开更多
TN248.5 99020902 连续波氧碘化学激光器的新进展=New progress inCW chemical oxygen—iodine laser[刊,中]/周大正(中科院大连化物所.辽宁,大连(116023))//物理.—1998,27(2).—83-89介绍了连续氧碘化学激光器的原理及发展过程,分析...TN248.5 99020902 连续波氧碘化学激光器的新进展=New progress inCW chemical oxygen—iodine laser[刊,中]/周大正(中科院大连化物所.辽宁,大连(116023))//物理.—1998,27(2).—83-89介绍了连续氧碘化学激光器的原理及发展过程,分析了氧碘激光器的主要关键技术,报道了新进展,提出了该激光器今后的发展趋势。参22(李瑞琴)TN248.5 99020903氧碘化学激光器高能强激光测量与校准问题的理论分析与计算=Theoretical analysis and calculationof the measurement and calibration of high—energyCOIL laser[刊。展开更多
基金Project supported by the National Natural Science Foundation of China (Grant Nos. 60736036 and 61021003)the National Basic Research Program of China (Grant No. 2011CB301702)
文摘We report a monolithic integrated dual-wavelength laser diode based on a distributed Bragg reflector （DBR） composite resonant cavity. The device consists of three sections, a DBR grating section, a passive phase section, and an active gain section. The gain section facet is cleaved to work as a laser cavity mirror. The other laser mirror is the DBR grating, which also functions as a wavelength filter and can control the number of wavelengths involved in the laser action. The reflection bandwidth of the DBR grating is fabricated to have an appropriate value to make the device work at the dual-wavelength lasing state. We adopt the quantum well intermixing （QWI） technique to provide low-absorption loss grating and passive phase section in the fabrication process. By tuning the injection currents on the DBR and the gain sections, the device can generate 0.596 nm-spaced dual-wavelength lasing at room temperature.
基金supported by the National Natural Science Foundation of China(No.11075118)the Specialized Research Fund for the Doctoral Program of Higher Education(No.20100072120036)
文摘The cross-correlation method for temporal characterization is investigated using simulations of the two- color above threshold ionization （ATI） on He induced by a vacuum ultraviolet （VUV） free-electron laser （FEL） in the presence of an infrared （IR） field. Non-linear dependencies of the sideband structure pro- duced in the two-color ATI process are expressed as a function of IR laser intensity by considering the spatial distributions and temporal jitter of both lasers. The temporal properties of the FEL pulse can be characterized accurately using the cross-correlation method at a low IR laser intensity of ~3~101~ W/cm2 but with low cross-correlation signals. When the dynamic range of sidebands is increased to high IR intensity, the accuracy of the cross-correlation method becomes crucially dependent on the actual non- linear index. An approach of determining this index is proposed here to improve the accuracy of temporal characterizations.
文摘“响应型材料与器件集成”国际联合实验室（英文：Joint Research Lab of Device Integrated Responsive Materials,简称DIRM）是华南师范大学与荷兰埃因霍温理工大学（Eindhoven University of Technology ） ,在汇聚双方功能材料与集成器件领域的顶尖人才和技术基础上共同创立的，其目的是促进两校乃至两国间的科技交流与合作、实现资源共享、搭建学术研究与创新成果产业化之间的桥梁．DIRM的成立，标志着华南师范大学在高端人才引进和国际化创新平台建设方面取得又一重大突破．DIRM的职责和功能主要在以下几点．
文摘TN248.5 99020902 连续波氧碘化学激光器的新进展=New progress inCW chemical oxygen—iodine laser[刊,中]/周大正(中科院大连化物所.辽宁,大连(116023))//物理.—1998,27(2).—83-89介绍了连续氧碘化学激光器的原理及发展过程,分析了氧碘激光器的主要关键技术,报道了新进展,提出了该激光器今后的发展趋势。参22(李瑞琴)TN248.5 99020903氧碘化学激光器高能强激光测量与校准问题的理论分析与计算=Theoretical analysis and calculationof the measurement and calibration of high—energyCOIL laser[刊。
