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We investigate the amplitude and phase noise of an optical frequency comb based on InAs/InP quantum-dash mode-locked laser. The laser demonstrates low relative intensity noise (< −125 dB/Hz) and phase noise in the passive mode-locking regime. By actively mode-locking the laser, we observe a reduction in the flicker FM noise and timing jitter, as a result of which the optical linewidth decreases,...
In this paper, a horizontally polarized antenna is proposed for the omnidirectional coverage in the 2.4-GHz WLAN band. The azimuthal omnidirectional pattern is provided by an open-ended cavity with a probe feed. The proposed structure exhibits good imitation of the ideal magnetic current with similar isotropic radiation pattern, even though with asymmetrical structure. A series of numerical simulations...
The development of distributed application in mobile ad hoc network faces great challenges. Accordingly, it has important significance to introduce the content-based publish/subscribe middleware. First this paper defines subscription language and event model containing event type domain. Then it proposes a novel content-based routing protocol which establishes an optimized dynamic multicast mesh and...
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