We propose a novel optical intensity modulator based on the combination of a symmetrical metal cladding optical waveguide （SMCW） and ferrofluid, where the ferrofluid is sealed in the waveguide to act as a guiding la...
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We propose a novel optical intensity modulator based on the combination of a symmetrical metal cladding optical waveguide （SMCW） and ferrofluid, where the ferrofluid is sealed in the waveguide to act as a guiding layer. The light matter interaction in the ferrofluid film leads to the formation of a regular nanoparticle pattern, which changes the phase match condition of the ultrahigh order modes in return. When two lasers are incident on the same spot of the waveguide chip, experiments illustrate all-optical modulation of one laser beam by adjusting the intensity of the other laser. A possible theoretical explanation may be due to the optical trapping and Soret effect since the phenomenon is considerable only when the control laser is effectively coupled into the waveguide.
We have experimentally demonstrated symmetric 40Gb/s TWDM-PON with long passive reach and high power budget. Directly-modulated lasers (DMLs) are used as both downstream and upstream lasers to reduce the system cost, ...
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This work introduces for the first time the notion of minimum interference to the RSA algorithm design and proposes two novel RSA algorithms for EON. Our results show a noticeable spectrum efficiency improvement. ....
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A review of our recent work on ultrahigh resolution optical fiber sensors in the quasi-static region is presented, and their applications in crustal deformation measurement are introduced. Geophysical research such as...
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A review of our recent work on ultrahigh resolution optical fiber sensors in the quasi-static region is presented, and their applications in crustal deformation measurement are introduced. Geophysical research such as studies on earthquake and volcano requires monitoring the earth＇s crustal deformation continuously with a strain resolution on the order of nano-strains （ne） in static to low frequency region. optical fiber sensors are very attractive due to their unique advantages such as low cost, small size, and easy deployment. However, the resolution of conventional optical fiber strain sensors is far from satisfactory in the quasi-static domain. In this paper, several types of recently developed fiber-optic sensors with ultrahigh resolution in the quasi-static domain are introduced, including a fiber Bragg grating （FBG） sensor interrogated with a narrow linewidth tunable laser, an FBG based fiber Fabry-Perot interferometer （FFPI） sensor by using a phase modulation technique, and an FFPI sensor with a sideband interrogation technique. Quantificational analyses and field experimental results demonstrated that the FBG sensor can provide nano-order strain resolution. The sub-nano strain resolution was also achieved by the FFPI sensors in laboratory. Above achievements provide the basis to develop powerful fiber-optic tools for geophysical research on crustal deformation monitoring.
We propose and experimentally demonstrate mutual optical format conversion between signals characterized as 1.-Gb/s nonreturn-to-zero on-of-{1.ing(NRZ-OOK) and NRZ binary phase-shift {1.ing(BPSK) types. The conversion...
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We propose and experimentally demonstrate mutual optical format conversion between signals characterized as 1.-Gb/s nonreturn-to-zero on-of-{1.ing(NRZ-OOK) and NRZ binary phase-shift {1.ing(BPSK) types. The conversion is based on stimulated Brillouin scattering(SBS) in a single-mode optical fber. An OOK signal is converted into a BPSK signal through optical carrier absorption, for which a SBS loss of 30 MHz is used in long-haul transmission. The converted BPSK signal is reverted to an OOK signal with a corresponding SBS gain of 30 MHz for direct detection. The proposed OOK-to-BPSK and BPSK-to-OOK format conversions can be implemented in transmitter and receiver nodes by using a laser source as the Brillouin pump.
Service fairness of traffic with different granularities in elastic optical {1. is addressed and correspondingly a fairness-aware spectrum allocation scheme is proposed. Simulation results imply that it achieves ...
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We experimentally demonstrate reconfigurable optical add-drop multiplexer functionality with less than 0.5-dB error vector magnitude penalty in a Nyquist superchannel system based on single carrier frequency domain eq...
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We propose subband-based optical networking on optical OFDM/SCFDM superchannel in elastic opticalnetworks. Feasibilities of add-drop, switching, conversion and multicasting functionalities on optical superchannel are...
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Service fairness of traffic with different granularities in flexible optical {1. is addressed, and correspondingly a spectrum allocation scheme is proposed. Simulation results imply that it achieves service fairn...
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