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We demonstrate an all-optical phase-sensitive amplifier, a critical component in integrated circuits for all-optical computing. The amplifier is fabricated in amorphous silicon-on-insulator and relies on thermo-optic self-heating in a ring-loaded Mach-Zehnder interferometer. changing the power and phase of the bias input tunes the gain.
We propose and experimentally demonstrate a coupled micro-ring cavity system. The cavity enables tunable resonance mode spacing, with mode spacing as low as 27.5 GHz is demonstrated in a footprint that is 87% less than a conventional single cavity system.
Quantum photonic technologies have the potential to revolutionise our information and communication systems, enabling ultra-secure communication and advanced computation with applications in quantum simulation and machine learning. Here we overview the potential of silicon photonics to realise such a technology platform.
We present the Ge Zener-Emitter injection mechanism for synthesis of an indirect semiconductor optical amplifier (ISOA), featuring gain characteristics and electro-absorption modulation with extinction ratios > 14 dB by sufficient Moss-Burstein shift, for generic Ge-on-Si Photonics platform.
This paper presents the design and preliminary results of a low power, compact and high-speed modulator in the O-band featuring apodized slow-light structures and a slow-wave RF design. The device is a candidate for future single mode optical interconnects in large-scale data centers.
We present a sealed, permanent, compact and efficient optical fiber-to-chip interface utilizing the wide-spread grating coupler. The easily produced fiber link is based on the reflection in an angle-polished fiber with a reflective metal coating. Efficiencies for different coupling methods to grating couplers are compared.
This paper presents a novel robust method to excite a slot waveguide mode. We experimentally demonstrate the fundamental slot-mode excitation in a Si slot-waveguide ring resonator. Furthermore, we also demonstrate nearly athermal (12 pm/°C) behaviour of PMMA filled slotted ring resonator.
Electro-optic phase modulation schemes are investigated by inducing carrier-concentration changes in transparent conducting oxide semiconductors, integrated in well-established silicon-photonic platforms. By exploiting the epsilon-near-zero effect, binary phase-shift keying modulation is manifested, resulting in high-speed modulation solutions of reduced footprint, compared to the conventional all-silicon...
The detection and amplification of molecular absorption lines from a chemical weapons simulant is demonstrated using plasmonic antennas fabricated from n-Ge epitaxially grown on Si. A free-standing Si0.25Ge0.75 microbolometer detector with n-Ge plasmonic antenna is demonstrated as an integrated mid-infrared plasmonic sensor.
Summary form only given, as follows. Tunable laser trace-gas spectroscopy has been effectively used in both environmental and medical applications, for its sensitivity and specificity. We’ll describe how contemporary silicon photonics manufacturing and assembly are leveraged for a cost-effective miniaturized spectroscopic sensor platform, and outline uses in fugitive methane emissions monitoring.
We demonstrated high reflection tolerance of a quantum dot distributed feedback laser. Laser characteristics of single mode operation of 40 dB SMSR and high power operation over 15 mW were obtained, and significant improvements of tolerance up to −30 dB near end reflection were successfully achieved.
We experimentally demonstrate a CMOS compatible optical parametric amplifier based on Si7N3 waveguides which are compositionally tailored that the 1550nm wavelength resides within the multi-photon regime, while possessing large nonlinear parameter of 550 W−1/m, 500 times larger than that in Si3N4.
We report on an optically wideband, resonantly enhanced Mach-Zehnder modulator co-integrated with a 4Ω output impedance, 28Gbd driver from Mellanox Technologies. Error free transmission is demonstrated, at 14Gbps (25Gbps), in 4nm (3nm) wide optical wavelength range at a 10mW (20mW) laser output power level.
A fully suspended mid-infrared racetrack resonator is experimentally demonstrated. It has good mechanical stability and broad spectral range of transparency. The measured loaded optical Q factor is 16,440 at 2402.38 nm, with an extinction ratio of 11.83 dB.
A hybrid III-V/SOI directly modulated DFB laser operating at 1.5 μο is fabricated, showing a side mode suppression ratio above 50 dB and a 3-dB bandwidth of 12 GHz. Error-free transmission (BER<10−9) at 10 Gb/s over 66-km SSMF is demonstrated without dispersion compensation and FEC.
We report on the first hybrid III-V on silicon integration of a DFB laser, an electro-absorption modulator and a semiconductor optical amplifier. We packaged the fabricated chipset and validated the module through 25Gb/s error-free transmissions for short reach communication applications.
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