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Periodically patterning Si with a pitch small enough to suppress diffraction, we synthesize an effective photonic medium with refractive index between those of Si and the cladding material. This technique releases new degrees of freedom in engineering of light-matter interaction, chromatic dispersion and light propagation in Si photonic waveguides. We report our advances in the development of subwavelength...
A novel kind of Add/Drop Mode Division Multiplexer based on a Mach-Zehnder interferometer with SubWave-length Grating waveguides as arms is presented. The proposed device exhibits less than 1dB insertion loss and more than 20dB extinction ratio in the whole C-Band.
Mode-division multiplexing (MDM) is currently under study due to its potential to further increase data rates in optical communication circuits. In this paper, we propose an add/drop MDM for the first- and second-order modes that cover the whole C-Band (1.53–1.57 $\mu{\rm m} $) . The device is based on a Mach–Zehnder interferometer, including periodic waveguides in the arms. Mode selectivity is provided...
Silicon-based photonics has generated a strong interest in the last years, mainly for optical telecommunications and optical interconnects in microelectronic circuits and industrial breakthroughs have been even performed by companies like IBM, Luxtera, INTEL, and ST Microelectronics. The main future rationales are the reduction of photonic system costs, the increase of the number of functionalities...
In this work, we present and analyze the ability of periodic SubWavelength Grating waveguides to act as mode filters. Moreover, we exploit this ability to design a novel kind of Add/Drop Mode Division Multiplexer exhibiting an extinction ratio over 20dB in the whole C-Band.
We demonstrate a monolithically integrated coherent receiver PIC on an InP substrate with a 120° optical hybrid and 40GHz pin-photodetectors. Moreover, the performance of the device for colorless detection of 28Gbaud 16-QAM signals in the C- and L-band is investigated.
We report 40Gbit/s ring resonator based silicon modulator fabricated on 300mm SOI wafers, with a comparison between theoretical and experimental performances.
Silicon-based photonics has generated a strong interest in recent years, mainly for optical telecommunications and optical interconnects in microelectronic circuits. The main rationales of silicon photonics are the reduction of photonic system costs and the increase of the number of functionalities on the same integrated chip by combining photonics and electronics. In this paper, we will present recent...
In most integrated optics platforms, including silicon-on-insulator, only minor modifications in refractive index are possible. The geometry of the waveguiding structure is thus the only degree of freedom for the design of devices. The use of sub-wavelength gratings (SWGs), i.e. structures that are small enough to suppress diffraction effects, enables local engineering of both refractive index and...
Multimode-Interference (MMI) devices (see Fig. 1a) are fundamental building blocks in photonic integrated circuits, where they are used for power splitting and combining, optical switches and modulators, Mach-Zehnder interferometers and 90º hybrids for coherent optical receivers [1]. MMIs are based on the self-image principle, by which the guided modes of the multimode region interfere to form replicas...
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