Kuanping Shang

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We present the design, fabrication and characterization of athermal nano-photonic silicon ring modulators. The athermalization method employs compensation of the silicon core thermo-optic contribution with that from the amorphous titanium dioxide (a-TiO(2)) overcladding with a negative thermo-optic coefficient. We developed a new CMOS-compatible fabrication(More)
This paper discusses optimum design strategies for high-efficiency hybrid semiconductor optical amplifiers (SOA). A comprehensive model is presented to determine the width, composition, and number of quantum wells for a hydrophobic bonded SOA with Ins−x−y)Ga(x)Al(y)As quantum-wells (QW). Optimizing the interfacial bonding layer, III–V wafer stack design,(More)
We design, fabricate, and demonstrate a silicon nitride (Si(3)N(4)) multilayer platform optimized for low-loss and compact multilayer photonic integrated circuits. The designed platform, with 200 nm thick waveguide core and 700 nm interlayer gap, is compatible for active thermal tuning and applicable to realizing compact photonic devices such as arrayed(More)
Arrayed waveguide gratings (AWGs) are one of the key components for dense wavelength division multiplexing (DWDM) systems enabling wavelength(de)multiplexing and routing scaling to a large number of channels with graceful increases in optical losses. AWGs are widely used in telecommunications, datacom, optical sensing, optical spectroscopy, and many other(More)
We have developed a simple and scalable graphene patterning method using electron-beam or ultraviolet lithography followed by a lift-off process. This method, with the merits of: high pattern resolution and high alignment accuracy, being free from additional etching or harsh processes, being universal to arbitrary substrates, and being compatible to Si(More)
Heterogeneously Integrated InP/Si3N4 Chip-Scale Module Chuan Qin1, Shaoqi Feng1, Kuanping Shang1, Shibnath Pathak1, Binbin Guan1, Matthew Clements1, Hongbo Lu1 and S. J. Ben Yoo1* 1Department of Electrical and Computer Engineering, University of California, Davis, CA 95616, USA *sbyoo@ucdavis.edu Abstract: We demonstrate static and dynamic optical arbitrary(More)
We investigate the athermal characteristics of silicon waveguides clad with TiO(2) designed for 1.3 µm wavelength operation. Using CMOS-compatible fabrication processes, we realize and experimentally demonstrate silicon photonic ring resonators with resonant wavelengths that vary by less than 6 pm/°C at 1.3 µm. The measured ring resonance wavelengths across(More)
We discuss the design and demonstration of highly efficient 1.55 µm hybrid III-V/Silicon semiconductor optical amplifiers (SOA). The optimized III-V wafer stack consists of Al(0.10)In(0.71)Ga(0.18)As multiple quantum wells (MQW) and Al(0.48)In(0.52)As electron stop layers to realize SOAs with high wall-plug efficiency (WPE). We present various designs and(More)
This paper demonstrates rapidly reconfigurable, high-fidelity optical arbitrary waveform generation (OAWG) in a heterogeneous photonic integrated circuit (PIC). The heterogeneous PIC combines advantages of high-speed indium phosphide (InP) modulators and low-loss, high-contrast silicon nitride (Si<sub>3</sub>N<sub>4</sub>) arrayed waveguide gratings (AWGs)(More)