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We demonstrate the use of integrated micro-resonator based optical frequency comb sources as the basis for transversal filtering functions for microwave and radio frequency photonic filtering and advanced functions.
Many different mode-locking techniques have been realized in the past [1, 2], but mainly focused on increasing the spectral bandwidth to achieve ultra-short coherent light pulses with well below picosecond duration. In contrast, no mode-locked laser scheme has managed to generate Fourier-limited nanosecond long pulses, which feature narrow spectral bandwidths (∼MHz regime) instrumental to applications...
Using high nonlinear enhancement in a CMOS compatible microring resonator incorporated in a SOA based nonlinear loop-mirror laser architecture, we observe passive mode-locking at extremely-low power levels generating 570ps pulses at a 14.8MHz repetition rate.
In this talk, the physics of microring resonators is discussed in the classical and quantum regimes, in the context of the exploitation of chi-3 effects in these cavities as done by our group. Through the implementation of a novel microring pumping scheme and a quantum reinterpretation of the frequency comb, we present an integrated platform for the generation of quantum optical states spread over...
Raman scattering can be exploited for amplification in optical fiber telecommunications or, chemical identification in spectroscopy, but represents a source of detrimental noise photons for quantum communications. The spectral distribution of spontaneous Raman scattering (SpRS) can be measured in bulk samples with the free-space 90° scattering method [1]. In long fibers the SpRS spectra can be measured...
We demonstrate 1st and 2nd order all-optical ultra-high speed temporal integration of complex optical waveforms by using an integrated CMOS compatible four-port micro-ring resonator. The device offers an unprecedented processing speed > 400GHz.
We demonstrate a silicon nanowire based radio frequency spectrum analyser based on cross-phase modulation. We show that the device is accurate, with cross-chirp from photogenerated free-carriers negligible and measure RF spectra for 640Gbaud on-off-keyed data.
We demonstrate temporal imaging of optical signals with sub-picosecond time features based on four wave mixing temporal-to-frequency domain conversion in a CMOS compatible, high index glass waveguide.
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