For future micro-and nanotechnologies,the manufacturing of miniaturized,functionalized,and integrated devices is indispensable.In this paper,an assembly technique based on a bottom-up strategy that enables the manufac...For future micro-and nanotechnologies,the manufacturing of miniaturized,functionalized,and integrated devices is indispensable.In this paper,an assembly technique based on a bottom-up strategy that enables the manufacturing of complex microsystems using only optical methods is presented.A screw connection is transferred to the micrometer range and used to assemble screwand nut-shaped microcomponents.Micro-stereolithography is performed by means of two-photon polymerization,and microstructures are fabricated and subsequently trapped,moved,and screwed together using optical forces in a holographic optical tweezer set-up.The design and construction of interlocking microcomponents and the verification of a stable and releasable joint form the main focus of this paper.The assembly technique is also applied to a microfluidic system to enable the pumping or intermixing of fluids on a microfluidic chip.This strategy not only enables the assembly of microcomponents but also the combination of different materials and features to form complex hybrid microsystems.展开更多
This letter proposes a new burst assembly technique for supporting QoS in optical burst switching (OBS) networks. It consists of the adaptive-threshold burst assembly mechanism and QoS-based random offset-time scheme....This letter proposes a new burst assembly technique for supporting QoS in optical burst switching (OBS) networks. It consists of the adaptive-threshold burst assembly mechanism and QoS-based random offset-time scheme. The assembly mechanism, which is fit well to multi-class burst assembly, not only matches with IP QoS mechanism based on packet classification, and also utilizes fairly and efficiently assembly capacity. Based on token-bucket model and burst segment selective discard (BSSD), the offset-time scheme can smooth the traffic to support OBS QoS. The simulation results show that the technique can improve the performance in terms of packet loss probability (PLP).展开更多
In order to have a better support of differentiated service, we propose Priority-based mixed burst assembly, in which packets of different priorities are assembled in a burst with an assigned proportion, and the prior...In order to have a better support of differentiated service, we propose Priority-based mixed burst assembly, in which packets of different priorities are assembled in a burst with an assigned proportion, and the priorities are lined in an ascending order in a burst from head to tail. Simulation results show that the proposed scheme performs very well in terms of latency and packet loss probability.展开更多
Recently, theoretical and experimental nano-sized fundamental devices for optical circuits have been proposed at the single-photon level. The assembly of a realistic optical circuit is now a reality. In this work, we ...Recently, theoretical and experimental nano-sized fundamental devices for optical circuits have been proposed at the single-photon level. The assembly of a realistic optical circuit is now a reality. In this work, we introduce a single-photon interconnector composed of two individual nanowires and an optical N-type four-level emitter that can turn the optical connection on and off optically. Because of dipole-induced transmission at the single-photon level, a single photon can travel between the two nanowires reciprocally, which guarantees its application as an all-optical interconnector.展开更多
In high power laser facility for inertial confinement fusion research, final optics assembly(FOA) plays a critical role in the frequency conversion, beam focusing, color separation, beam sampling and debris shielding....In high power laser facility for inertial confinement fusion research, final optics assembly(FOA) plays a critical role in the frequency conversion, beam focusing, color separation, beam sampling and debris shielding. The design and performance of FOA in SG-II Upgrade laser facility are mainly introduced here. Due to the limited space and short focal length, a coaxial aspheric wedged focus lens is designed and applied in the FOA configuration. Then the ghost image analysis,the focus characteristic analysis, the B integral control design and the optomechanical design are carried out in the FOA design phase. In order to ensure the FOA performance, two key technologies are developed including measurement and adjustment technique of the wedged focus lens and the stray light management technique based on ground glass.Experimental results show that the design specifications including laser fluence, frequency conversion efficiency and perforation efficiency of the focus spot have been achieved, which meet the requirements of physical experiments well.展开更多
基金We thank the German Research Foundation DFG(Deutsche Forschungsgesellschaft)for their generous support within the Reinhardt Koselleck project(OS 188/28-1).
文摘For future micro-and nanotechnologies,the manufacturing of miniaturized,functionalized,and integrated devices is indispensable.In this paper,an assembly technique based on a bottom-up strategy that enables the manufacturing of complex microsystems using only optical methods is presented.A screw connection is transferred to the micrometer range and used to assemble screwand nut-shaped microcomponents.Micro-stereolithography is performed by means of two-photon polymerization,and microstructures are fabricated and subsequently trapped,moved,and screwed together using optical forces in a holographic optical tweezer set-up.The design and construction of interlocking microcomponents and the verification of a stable and releasable joint form the main focus of this paper.The assembly technique is also applied to a microfluidic system to enable the pumping or intermixing of fluids on a microfluidic chip.This strategy not only enables the assembly of microcomponents but also the combination of different materials and features to form complex hybrid microsystems.
基金This work was supported by National Hi-Tech Research and Development Program of China (863 Program) under contract No. 2002AA122021.
文摘This letter proposes a new burst assembly technique for supporting QoS in optical burst switching (OBS) networks. It consists of the adaptive-threshold burst assembly mechanism and QoS-based random offset-time scheme. The assembly mechanism, which is fit well to multi-class burst assembly, not only matches with IP QoS mechanism based on packet classification, and also utilizes fairly and efficiently assembly capacity. Based on token-bucket model and burst segment selective discard (BSSD), the offset-time scheme can smooth the traffic to support OBS QoS. The simulation results show that the technique can improve the performance in terms of packet loss probability (PLP).
基金This work is partially supported by the National Natural Science Foundation of China under contract 69990540.
文摘In order to have a better support of differentiated service, we propose Priority-based mixed burst assembly, in which packets of different priorities are assembled in a burst with an assigned proportion, and the priorities are lined in an ascending order in a burst from head to tail. Simulation results show that the proposed scheme performs very well in terms of latency and packet loss probability.
基金Project supported by the National Natural Science Foundation of China(Grant Nos.11274242,11474221,and 11574229)the Joint Fund of the National Natural Science Foundation of China+2 种基金the China Academy of Engineering Physics(Grant No.U1330203)the National Key Basic Research Special Foundation of China(Grant Nos.2011CB922203 and 2013CB632701)the Doctor Startup Fund of the Natural Science of Jinggangshan University,China(Grant No.JZB16003)
文摘Recently, theoretical and experimental nano-sized fundamental devices for optical circuits have been proposed at the single-photon level. The assembly of a realistic optical circuit is now a reality. In this work, we introduce a single-photon interconnector composed of two individual nanowires and an optical N-type four-level emitter that can turn the optical connection on and off optically. Because of dipole-induced transmission at the single-photon level, a single photon can travel between the two nanowires reciprocally, which guarantees its application as an all-optical interconnector.
文摘In high power laser facility for inertial confinement fusion research, final optics assembly(FOA) plays a critical role in the frequency conversion, beam focusing, color separation, beam sampling and debris shielding. The design and performance of FOA in SG-II Upgrade laser facility are mainly introduced here. Due to the limited space and short focal length, a coaxial aspheric wedged focus lens is designed and applied in the FOA configuration. Then the ghost image analysis,the focus characteristic analysis, the B integral control design and the optomechanical design are carried out in the FOA design phase. In order to ensure the FOA performance, two key technologies are developed including measurement and adjustment technique of the wedged focus lens and the stray light management technique based on ground glass.Experimental results show that the design specifications including laser fluence, frequency conversion efficiency and perforation efficiency of the focus spot have been achieved, which meet the requirements of physical experiments well.
