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Employing a nanotube-based saturable absorber, we demonstrate a continuously tunable (1533–1563nm) ultrafast fiber laser, with output pulsewidth switchable between picosecond (1.2 ps) and femtosecond (610 fs) regimes.
We demonstrate gain-guided dissipative soliton operation of a linearly polarized Yb-doped fiber laser, mode-locked by carbon nanotubes. In the regime of low nonlinear phase shift per cavity roundtrip, a dissipative soliton pulse can be supported by the finite gain bandwidth, without the need for strong spectral selection. The gain-guiding dynamics are confirmed by simulations.
A silicon-on-insulator bandpass filter based on the integration of a Mach-Zehnder interferometer with ring resonators and phase shifters is fabricated. The device exhibits wide tunability over both the central wavelength and bandwidth of the filter.
We demonstrate that travelling-wave four-wave mixing in coupled resonators overcomes the bandwidth limitations of wavelength conversion in single resonators, preserving the efficiency enhancement: 28-dB gain over silicon waveguides of the same length is here achieved.
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.
Reconfigurable architectures based on bi-dimensional arrays of integrated ring-resonators (RRs), also known as resonant routers (ReRs), are good candidates for implementing advanced routing and switching operations in both WDM and access optical networks. ReRs provide high flexibility, full reconfigurability and the capability of handling many WDM optical channels in small footprint devices. In this...
Coupled resonator optical waveguides (CROWs) are widely considered promising building blocks for the on-chip processing of wideband data-streams. The performances of these structures are much sensitive to disorder effects, affecting both losses and the maximum achievable slowing ratio. To date, how and how much disorder influences the slow-wave propagation regime is still an open issue. In this contribution,...
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