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A Full 25GB/S silicon photonics platform is described in this paper, and new technological challenges that aim to improve this platform, such as multiple silicon levels, silicon nitride levels, edge coupling processing or integration of heterogeneous materials to enable tunable integrated lasers, are discussed.
Despite the high phase non-linearity of a Silicon Mach-Zehnder Modulator in forward bias, we demonstrate that high third order spur-free dynamic range ~102.8 dB. Hz2/3 can be obtained by optimizing the D.C. bias operating point at 1 GHz.
We demonstrate multi-level optical weights embedded in a silicon photonic platform based on ferroelectric domain switching. Ferroelectric barium titanate integrated on silicon resonator structures is used as the memory material. By applying short voltage pulses of 100ns, we can switch fractions of the ferroelectric domains and thus change the transmission of the waveguides by more than one order of...
Sensors and wearables that monitor physiological data in fitness and healthcare applications are becoming more and more popular. More particularly the use of high signal-to-noise ratio Silicon Photomultipliers (SiPMs) could represent a breakthrough in terms of enhanced detection capability and portability in many applications used for physiological signs monitoring such as Photopletysmography (PPG)...
We present the first demonstration of a continuous wave DBR laser for the Indium Phosphide Membrane On Silicon (IMOS) platform. The laser with 500 μm long cavity has a threshold current density of 2.5 kA/cm2 and total output power in a waveguide of 0.6 mW.
We have demonstrated packaging of a silicon photonic chip with polymer multimode waveguides on a package substrate in a face-up electro-optic 3D integration scheme. The optical loss at the die-to-package interface in O-band was measured to be 7.6dB, which agrees well with simulation.
In future radio access networks, radio-over-fiber links will be a key enabling technology. A link which is cost-effective in both deployment and operation will be of paramount importance to the development of such networks. Using silicon photonics for the transmitter and receiver is a cost-effective and high-performance solution. In this work we present a link which can transport up to 16 Gbps 16-QAM...
Bandwidth limitation of current wireless frequency bands and the energy consumption are challenges that have to be addressed by future 5G wireless networks. The millimeter wave (mm-wave) spectrum, spanning 30 GHz to 300 GHz, is a prime candidate to resolve the bandwidth limitation issue in future networks. High-speed electronics, though, are quite energy-inefficient for such mm-wave signal generation...
We propose a silicon photonics (SiP) enabled interference cancellation scheme for orthogonal frequency division multiplexing (OFDM) using direct detection. System performance is evaluated by sweeping the signal-to-carrier ratio, guard band, and SiP component parameters.
Mach-Zehnder modulators introduce nonlinearities for large driving signals that induce bit error rate (BER) penalties. In silicon photonics a nonlinear phase response leads to a more complex nonlinear response. We propose a digital pre-distorter based on a nonlinear memory polynomial model to reduce BER penalty.
We present an ultra-broadband two-mode de/multiplexer based on a multimode interference coupler with sub-wavelength grating waveguides, a symmetric Y-junction and a 90° phase shifter. Numerical simulations show insertion losses below 0.18 dB and crosstalk lower than −20.6 dB in a 300 nm wavelength range.
Fully three-dimensional wavefront matching method for waveguide discontinuity problem is newly developed. In principle, the developed method can be applied to optimize any geometries including reflection. The application for Si mode converters (TE0-TE1, and TE0-TE2) are demonstrated and ultrasmall structure with low-loss is obtained.
We report theoretical and experimental results on second harmonic generation from individual pillars and dimers monolithic AlGaAs-on-AlOx nanoantennas. We demonstrate peak conversion efficiencies exceeding 10−5 for a 1.6 GW/cm2 pump intensity.
Microring weight banks enable reconfiguration in analog photonic networks and multi-channel RF front-ends. We demonstrate 2-ring weight banks and show that they are tolerant to fabrication and thermal effects. Weights consisting of two microrings can potentially increase channel capacity by a factor of 2.72-fold.
We present the Ge-on-insulator platform for photonic integrated circuits. We have successfully demonstrated Ge photodetector integrated with a-Si waveguide. Ge passive waveguides and carrier-injection modulator operating at 2 μm wavelength are also demonstrated.
A novel piezoelectric actuator is fabricated on a suspended silicon nitride ring resonator to tune the optical resonance via mechanical deformation. Fabricated devices exhibit tuning across a full free spectral range by applying 16 V across the piezoelectric.
GaN emitters have historically been of hexagonal phase due to natural crystallization. Here we introduce a cubic phase GaN emitter technology that is polarization-free via cointegration on cheap and scalable CMOS-compatible Si(100) substrate.
In the application of microwave photonic links, a solution is proposed to suppress the harmonic of the silicon microring modulator by optimizing the bias voltage applied on this modulator, and the influence of input rf power on this bias voltage is also analyzed. Simulation results show that this optimized bias voltage varies by the input rf power due to the nonlinearity in the silicon microring modulator,...
We have experimentally demonstrated that the linearity of a silicon Mach-Zehnder modulator (MZM) could be improved by optimizing its phase-shifter length (PSL). Through the optimization of the PSL, the third order intermodulation distortion of the silicon MZM could be 16.7 dB lower than that of a commercial LiNbO3 MZM. The spurious free dynamic range of the link with the silicon MZM could be 4.1 dB...
Monolithic CMOS photonics seeks to minimize total transceiver cost by simplifying packaging, design and test. Here, I examine 25 Gb/s applications in commercially available process technology with a focus on receiver sub-system optimization.
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