Steven C Nicholes

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Novel monolithic programmable optical filters are proposed and demonstrated. Deeply-etched waveguides are used throughout. Unit cells, incorporating a ring resonator in one arm of a Mach-Zehnder, have given programmable poles and zeros; cascaded unit cells have yielded flat-topped band-pass filter characteristics.
—In this paper, we demonstrate single-channel operation of the first InP monolithic tunable optical router (MOTOR) chip designed to function as the packet forwarding engine of an all-optical router. The device has eight-input and eight-output ports and is capable of 40-Gb/s operation per port with bit-error rates below 1E-9. MOTOR integrates eight(More)
—A novel monolithic programmable optical lattice filter consisting of unit cell building blocks is proposed. Single unit cells incorporating a ring resonator in one arm of a Mach–Zehnder are fabricated in an InGaAsP–InP material system. Programmable poles and zeros are demonstrated and monolithically cascaded unit cells are used to synthesize a flat(More)
—Communications interconnects and networks will continue to play a large role in contributing to the global carbon footprint, especially in data center and cloud-computing applications exponential growth in capacity. Key to maximizing the benefits of photonics technology is highly functional, lower power, and large-scale photonics integration. In this(More)
We demonstrate the first InP monolithic tunable optical router with error-free 40 Gbps operation per port. The device has eight wavelength converters and an 8x8 arrayed-waveguide grating router, yielding more than 200 on-chip functional elements. 1. Introduction Advanced photonic integrated circuits (PIC) in InP are a critical technology for next-generation(More)
—The performance of relatively complex photonic integrated circuits (PICs) is now reaching such high levels that the long sought goal of realizing low-cost, –size,-weight, and-power chips to replace hybrid solutions seems to have been achieved for some applications. This tutorial traces some of the evolution of this technology that has led to an array of(More)
High verticality and reduced sidewall deterioration of InP/InGaAsP in Cl 2 / H 2 / Ar inductively coupled plasma etching is demonstrated for a hydrogen dominant gas mixture. Selectivity Ͼ20: 1, an etch rate of 24 nm/s, and a sidewall slope angle of Ͼ89° have been measured for etch depths Ͼ7 ␮m. The Ar flow is minimized to reduce surface etch damage while(More)
We demonstrate a novel technique for free-carrier absorption reduction using an InP buffer layer with quantum well intermixing. Application of this technique enabled fabrication of monolithic tunable optical routers with more than 200 functions.
We demonstrate 10 Gbps error free operation through multiple ports of an InP monolithic tunable optical router consisting of eight input wavelength converters and an 8x8 passive arrayed-waveguide grating router. 1. Introduction All-optical routing technologies are an attractive alternative to traditional electronic-based routing because of the potential to(More)
Large-scale photonic integration depends on robust epitaxial design and fabrication techniques. This paper reviews the integration strategy we developed to demonstrate an 8x8 InP-based monolithic tunable optical router capable of 40 Gbps operation per port.