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We show a direct comparison between silicon reconfigurable delay lines based on coupled resonator optical waveguides and photonic crystal waveguides. The structures are used to selectively delay the two orthogonally polarized channels of a RZ-PolDM-DQPSK format at 100 Gbit/s.
An integrated device capable of dynamically controlling the differential delay between two orthogonally polarized data channels is presented. The polarization-selective delay is induced by exploiting waveguide birefringence in a ring-resonator coupled resonator optical waveguide. A prototype realized in silicon-oxynitride technology is employed to manage the differential delay between two polarization-division-multiplexed...
We demonstrate that a coupled resonator optical waveguide can be used to control the delay of a 10 Gbit/s NRZ duobinary signal by 3 bit-lengths without significantly corrupting phase information.
Continuously tunable relative delay between orthogonally polarized data-streams is demonstrated in an integrated ring-resonator CROW. System performance and applications to polarization-division multiplexing transmission systems are discussed.
10 Gb/s DPSK demodulation effectiveness of a suitably-designed FBG structure is compared with the performance achieved by a compact integrated-optic MZDI. BER measures versus operation stability are reported.
A continuously tunable delay of 8 bit-lengths at 10 and 25 Gbit/s is achieved by using a ring-based coupled-resonator-optical-waveguide fabricated in SiON technology. Fractional loss below 1 dB per bit-delay and storage efficiencies exceeding 1 bit-delay per ring-resonator are demonstrated.
The possibility of dynamically controlling the speed of light can be extremely useful in all the optical applications where a variable delay is needed, such as bit and frame synchronization and optical storage. To this aim, coupled resonator slow-wave structures (SWSs) represent a promising approach to slow down the propagation of optical signals with as large bandwidths as required by optical communication...
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