Fiber lasers of high-order spatial modes are advantageous in a number of applications. We experimentally demonstrate a transverse mode-selective few-mode Brillouin fiber laser using a pair of mode-selective photonic lanterns as spatial mode filters. The three LP lasing modes were generated based on both intra- and inter-modal stimulated Brillouin scattering. Their slope efficiencies, optical spectra, mode profiles, and linewidths were characterized for both cases. Based on the ring-cavity configuration, distributed temperature and strain sensing with 1-m spatial resolution is also demonstrated. The Brillouin dynamic grating was generated in the LP01 mode and high-order modes were used as probes. The feasibility of simultaneous temperature and strain sensing has also been investigated.
The convergence of EPON and WiMAX is one promising solution for Fiber Wireless access network, QoS is an important technical issue in this hybrid access network. We propose a novel QoS scheme of EPON and WiMAX integrated network based on unified QoS management which has been implemented and proved its effectiveness.
In order to resolve the P2P topology mismatch problem, a novel P2P service redirection scheme has been proposed by us
and the scheme is fully described in reference. Furthermore, we have successfully implemented this mechanism in
EPON system. Experimental results show that our scheme can effectively reduce core network traffic, and evidently
improve clients' downloading rate.
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