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We report on our experimental progress towards observing weak-value amplification of low-light-level cross-phase modulation which will be the first observation of a weak measurement relying on true entanglement between distinct systems.
We present modulators developed in the projects “HELIOS”, and “UK Silicon Photonics”, integration with modulator driver to produce the first silicon modulator fully integrated with BiCMOS, and multiplexed photonic crystal modulators for ultra-low power operation.
Coherently injection-locked and directly modulated WRC-FPLD for optical 16-QAM/122-subcarrier OFDM transmission at 1.5625GHz central carrier over 25km is demonstrated to achieve 12.5Gbit/s bit-rate with receiving sensitivity of −7dBm at BER of 1 × 10−7.
We proposed a linearized analog link based on single sideband phase modulator. Results show that the nonlinearity of modulator and dispersion are simultaneously compensated, and the improvement of ∼21-dB in spurious-free dynamic range are obtained.
We present theoretical design and experimental demonstration of surface-normal modulation on a gold metallic photonic crystal slab. It requires a moderate index modulation of 0.0043 that is induced by thermal-optical effects of the glass substrate.
We demonstrate all-optical modulation of individual resonances of a two-ring silicon microresonator switching fabric using Raman-induced loss. The number of unique output states for such a switching fabric scales exponentially with the number of signals.
Vanadium dioxide (VO2) films have optical properties that are strongly temperature dependent. Optical switching of VO2 thin films with co-planar surface electrodes is demonstrated and characterized for possible spatial light modulating applications in the mid-infrared. Switch time, amplitude, voltage, and recovery are reported for electrode gap sizes from 200 to 800 microns.
Pulses from an actively modelocked terahertz quantum cascade laser are characterized using an optical sampling technique to detect the instantaneous terahertz intensity. Dependence of the pulse width on modulation power and drive current are investigated.
We demonstrate linear optical pulse compression by using temporal phase zone plates based on electro-optic phase modulation, achieving experimental time-bandwidth products (or equivalent time compression factors) > 150 using phase-modulation amplitudes of only ττ radians.
We temporally resolve ultrafast modulation of quantum cascade lasers (QCLs) using a near-infrared pump mid-infrared probe technique. We compare interband and intersubband transition mechanism assisted modulation of QCLs by using different pump wavelengths.
Record transmissions with the direct modulation of a 1550nm-hybrid III/V-on-Silicon laser of 21.5Gbps in optical back-to-back (B2B) and 12.4Gbps over 50km of Single-Mode Fiber (SMF) are achieved. Neither optical amplification, nor optical dispersion-compensation is used.
By integrating compact and high-speed silicon modulators and germanium photodiodes with light sources, we demonstrated a silicon optical interposer for inter-chip interconnects with a bandwidth density of 6.6 Tbps/cm2.
We demonstrate that by optimizing excitation photon energy in optical modulation of quantum cascade laser, both amplitude and frequency modulation depth are increased. Also, optical switch on and off can be controlled by excitation wavelength.
Using scanning probe microscopy with modulated illumination, we demonstrate simultaneous measurement of topography and optical forces exerted on a probe. Broadband optical field detection is possible using a single probe.
A coupling-modulated microring in an add-drop configuration for DPSK that uses the jt phase-flip in a 2×2 Mach-Zehnder interferometer coupler for the modulation is proposed. The concept is demonstrated in silicon-on-insulator at 10 Gb/s.
A 25-GHz 3-ps optical Gaussian pulse generator using phase modulators is experimentally demonstrated with wavelength tunability over C-band. Error-free 100-km transmission of 100-Gb/s OTDM signal is achieved with it.
We propose to use a dispersive element to linearize the phase-modulation-induced chirp for ultraflat optical frequency comb generation. The spectral power variation is reduced to less than 1 dB in both the simulation and experiment.
We demonstrate a new temporal cloak capable of hiding 46% of the entire time axis at a repetition rate of 12.7 GHz. Our results introduce temporal cloaking into the practical domain of secure optical communication.
We experimentally demonstrate tunable fast light in a semiconductor optical amplifier based on cross-gain modulation. Up to 60 ps amplitude-invariant time delay is achieved on a 500 MHz microwave signal.
We demonstrate experimentally a plasmonic enhancement of the transverse magneto-optical Kerr effect. The enhanced Kerr effect modulates the transmitted light intensity by a large value of 1.5%, while high transparency of the system is maintained.
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