WDM systems cascaded by Er 3 -Tm 3+ -codoped tellurite fiber amplifiers pumped by 800- and 980-nm lasers are analyzed for the first time in this paper. We use an amplifier model based on propagation and population-rat...
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WDM systems cascaded by Er 3 -Tm 3+ -codoped tellurite fiber amplifiers pumped by 800- and 980-nm lasers are analyzed for the first time in this paper. We use an amplifier model based on propagation and population-rate equations that are solved numerically using the Runge-Kutta algorithm and Newton's iterative method. In addition to analyzing the performance of the 800-nm pump, we also study the performance improvement after adding a new pump of 980 nm. With this new 980-nm pump, channels in the 1420-1620-nm wavelength region can reach a bit error rate (BER) less than 1times10 -9 , with a transmission distance of 400 km.
We demonstrated a simple all-normal-dispersion Yb-doped femtosecond fiber laser, which delivers a pulse with 8.9 nJ and 33 MHz. After the extracavity compression with a grating pair, the pulse was compressed to 210 fs...
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As a new solution raised in recent years of optical switches, Semiconductor microring resonator device has its advantages in low-power consumption, ultralow-latency, ultracompactness. Other research groups have propos...
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As a new solution raised in recent years of optical switches, Semiconductor microring resonator device has its advantages in low-power consumption, ultralow-latency, ultracompactness. Other research groups have proposed many valuable schemes on microring resonator optical switch. We analyzed the characteristic of the microring resonator based on its theory and structure. Depending on the latest research progress, we introduce the use of the microring resonator as switches. We also discuss the emphasis which need to be further improved and the perspective of the microring resonator as ultralow-latency optical switches.
Under the current and foreseeable limitations of optical technology, performance of optical packet-switched networks is mainly hampered at the network node by resource contention. The contention is serious constraints...
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A multi-sender-controlled quantum teleportation scheme is proposed to teleport several secret quan- tum states from different senders to a distance receiver based on only one Einstein-Podolsky-Rosen (EPR) pair with co...
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A multi-sender-controlled quantum teleportation scheme is proposed to teleport several secret quan- tum states from different senders to a distance receiver based on only one Einstein-Podolsky-Rosen (EPR) pair with controlled-NOT (CNOT) *** the present scheme,several secret single-qubit quantum states are encoded into a multi-qubit entangled quantum *** communication modes,i.e.,the detecting mode and the message mode,are employed so that the eavesdropping can be detected easily and the teleported message may be recovered *** has an advantage over teleporting several different quantum states for one scheme run with more efficiency than the previous quantum teleportation schemes.
FTTH development is slow but steady in China. The phenomenon is rooted from some major challenges, such as cost, limited bandwidth in Metro networks, bandwidth consumption behaviours. To address above challenges, FTTH...
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ISBN:
(纸本)9781424429059
FTTH development is slow but steady in China. The phenomenon is rooted from some major challenges, such as cost, limited bandwidth in Metro networks, bandwidth consumption behaviours. To address above challenges, FTTH architectures and bandwidth consumption behaviours are studied in the paper. To remove the bandwidth bottleneck between access and Metro networks and reduce cost, LR-PON (Long-Reach Passive optical Network) is suggested to be applied in two ways in China. For resolving the challenge of bandwidth exhaustion in Metro networks caused by high-capacity consumption in access networks, a new bandwidth scheduling, Bandwidth on Schedule (BoS) is proposed to improve efficiency of bandwidth utilization. In the paper, the proposed solutions to challenges will be helpful to increase the penetration rate of FTTH deployment in China.
To reply to the Comment on our original paper entitled “Arbitrated quantum-signature scheme” [Phys. Rev. A 65, 042312 (2002)], we present more detailed presentations and proofs of the quantum-signature scheme in our...
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To reply to the Comment on our original paper entitled “Arbitrated quantum-signature scheme” [Phys. Rev. A 65, 042312 (2002)], we present more detailed presentations and proofs of the quantum-signature scheme in our paper. We feel our further investigation has shown that the original quantum-signature scheme is secure and operationally well defined. In addition, proofs illustrate that the quantum-signature scheme with unknown quantum states is also suitable in principle.
We propose an optical crosspoint buffered switching fabric to simplify the implementation of optical packet switches. With the proposed switching fabric architecture, the control complexity of the optical buffers can ...
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ISBN:
(纸本)0858258072
We propose an optical crosspoint buffered switching fabric to simplify the implementation of optical packet switches. With the proposed switching fabric architecture, the control complexity of the optical buffers can be significantly reduced.
A quantum secure direct intercommunication scheme is proposed to exchange directly the communicators＇ secret messages by making ase of swapping entanglement of Bell states. It has great capacity to distribute the sec...
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A quantum secure direct intercommunication scheme is proposed to exchange directly the communicators＇ secret messages by making ase of swapping entanglement of Bell states. It has great capacity to distribute the secret messages since these messages have been imposed on high-dimensional Bell states via the local unitary operations with superdense coding. The security is ensured by the secure transmission of the travel sequences and the application of entanglement swapping.
We present a universal protocol for continuous-variable graph-state teleportation. A mathematical model is established to determine an arbitrary graph state’s properties, including the possibility of teleportation an...
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We present a universal protocol for continuous-variable graph-state teleportation. A mathematical model is established to determine an arbitrary graph state’s properties, including the possibility of teleportation and the relevant analytical criteria. By investigating the properties of several fundamental graph-state types, we identify a general strategy for optimizing excess noise due to finite squeezing. As an application, a general scheme for teleportation between two arbitrary parties on a two-dimensional square lattice cluster state is given, along with a cheaper yet equivalent optimization for fixed source-target teleportation. Finally, a universal way to distill bipartite entanglement from a graph-state entanglement network is presented based on the equivalence between teleportation and entanglement distillation.
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