The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
We report the first demonstration of a broadband optical isolation using a Silicon nanowaveguide via Bragg scattering four-wave mixing. We achieve an isolation ratio of 4 dB over a bandwidth of 8 nm.
We investigate optical crosstalk on a signal in a silicon nanowaveguide due to the presence of another signal by direct radio frequency crosstalk level measurements in a pump-probe configuration and by bit-error-rate-based characterization. We quantify this degradation as a function of the modulation frequency and power of the auxiliary signal. Our results indicate that two-photon and free-carrier...
We experimentally demonstrate all-optical control of a single resonance in a silicon micro-ring resonator using Raman-induced loss. Simulations indicate the potential for signal routing with >97% throughput using picojoule control pulses.
We demonstrate all-optical switching of a silicon ring-resonator using two photon absorption of engineered organic materials. We show hitless switching of 7dB change in extinction with power dissipation of 400 fJ/op.
We generate optical frequency combs spanning 75 THz with a 204-GHz spacing using parametric oscillation in an integrated silicon-nitride microring resonator. The comb spacing is uniform to better than 5.2×10−11 relative to the optical frequency.
We characterize optical crosstalk and the associated bit-error rate degradation in silicon nanowaveguides. Results indicate that crosstalk decreases with increasing modulation frequency, which we attribute to free-carrier lifetime in the nanowaveguides.
We demonstrate an all-optical method for characterizing ultrafast pulses by differential tomography, using four-wave mixing. The technique is used to measure dispersion for various lengths of silica fiber.
We demonstrate single-shot measurement of the phase and amplitude of an ultrafast waveform using time-magnification and heterodyning with simple external clock synchronization.
We characterize optical crosstalk and the associated bit-error rate degradation in silicon nanowaveguides. Our results indicate that the crosstalk decreases with increasing modulation frequency and decreases with input power, which we attribute to free-carrier absorption.
We demonstrate a new technique of efficient, time-resolved, infrared single-photon detection using noncollinearly phase-matched frequency upconversion by an ultrafast pump, allowing nearly background-free sub-picosecond characterization of 1582-nm time anti-correlated entangled photons.
We demonstrate a narrowband pulsed source of polarization-entangled photons based on parametric downconversion in a phase-stable Sagnac interferometer that is suitable for free-space quantum key distribution with high key generation rates.
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.