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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.
In this paper, a compact triplexer is proposed by cascading three tilted multimode interference couplers for FTTH applications. AH components based on silicon rib waveguides. Firstly, a MMI coupler is designed to separate the 1310 nm wavelength band by using pseudo self-imaging technique. A tiled MMI coupler is then cascaded to separate the 1490 nm and 1550 nm wavelength bands. Numerical simulations...
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...
We demonstrate first results towards sub-THz integration system based on micromachined waveguides on Silicon. The demonstrated components at 270 GHz include waveguides, filters and vias, as well as a loss-low transition between the waveguide and the MMIC. The developed process relies on well known MEMS manufacturing methods and Silicon wafer substrates, promising scalable and cost efficient system...
The process where a laser and a Si waveguide were coupled was simulated by MATLAB. In order to obtain the coupling efficiency accurately and quickly, an improved finite-difference beam-propagation method(FD-BPM) and the simple transparent boundary condition(STBC) were selected. Several spot-size convertors (SSCs) of different structure with tapered Si waveguide, square SiON waveguide and SiO2 layer...
A broadband silicon PSR is presented with an insertion loss lower than ∼0.7dB/0.3dB and crosstalk lower than 12.1dB/14.7dB for TE and TM mode respectively. By combining the PSR with AWG and Germanium PDs, an integrated polarization insensitive DWDM receiver is further demonstrated.
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.
A heterogeneous platform i s demonstrated by integrating lithiumniobate and chalcogenide glass waveguides on silicon with optical transition through low-loss mode-converting tapers. The method provides an efficient utilization of second- and third-order nonlinearities on t he same chip for applications like stabilized octave-spanning optical combs.
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 present a simple device architecture enabled by an effective fabrication process to realize high-Q, ultra-compact microresonators with large free spectral ranges on silicon nitride at visible wavelengths. We demonstrate Qs >60 K for microdisks with radii as small as 2.5 μm.
We demonstrated the distributed optoelectronic properties enabled by graphene Bragg gratings (GBGs) to realize a hybrid single mode laser on silicon. A remarkable side-mode suppression ratio (SMSR) of 48 dB is achieved, benefitting from the complex coupling of the GBGs.
In this work we present a methodology to post-process a large array of a few hundred nanometer thin photonic membranes that were fabricated using complementary metal-oxide-semiconductor (CMOS) technological platform. The post processing results in local removal of the silicon substrate and of the buried oxide (BOX), which provides a free access from both side of the photonic structures. The membranes...
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.
In this paper, an all-optical logic gate with multiple functions and asymmetric structure is theoretically designed and simulated using a silicon on insulator (SOI)-based multimode interference (MMI) coupler. By switching the optical signal to different input waveguide ports, the device can function as an OR, NOT, NAND, or NOR gate simultaneously or individually. Simulation results by using three-dimensional...
Design a component structure of an SOI microneic resonator. It is a waveguide with a width of 450 nm and a height of 220 nm. The light is in the range of 2.5 μm. It surrounds its waveguide with SiO2. In order to make the ring resonant cavity meet the phase matching conditions. The element uses a ring-to-waveguide coupling zone and adjusts the coupling parameters by changing the coupling pitch. In...
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 demonstrate first results towards sub-THz integration system based on micromachined waveguides on Silicon. The demonstrated components at 270 GHz include waveguides, filters and vias, as well as a loss-low transition between the waveguide and the MMIC. The developed process relies on well known MEMS manufacturing methods and Silicon wafer substrates, promising scalable and cost efficient system...
In this paper, we investigated two designed structures for application in optical buffers with using photonic crystal technology. In the first structure, silicon slab is used with air holes in hexagonal lattice. However, in the second structure, we used Lithium Niobate slab with air holes. In the two cases, slow light criteria and optical buffering is demonstrated with bit length, delay time and buffer...
Germanium-on-silicon waveguides are designed, fabricated and characterized with a novel near-field infrared spectroscopy technique that allows on-chip investigation of the in-coupling efficiency. On-chip propagation along bends and straight sections up to 0.8 mm is demonstrated around λ = 6 μm.
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