Waveguide nonlinear-optic devices and integrated semiconductor lasers with appropriate design can perform quantum-optics functions that are potentially useful for R&D of quantum information processing. This paper reports the current status of the work of the authors group in this new subarea "Quantum Photonic Devices", including theoretical background, design and fabrication of quasi-phase matc...

We discuss a first-order design tool for waveguidecoupled microring resonators based on an approximate solution of the wave propagation in a microring waveguide with micronsize radius of curvature and a large lateral index contrast. The model makes use of the conformal transformation method and a linear approximation of the refractive index profile, and takes into account the effect of waveguid...

Arrayed waveguide gratings (AWGs) are useful structures for the implementation of wavelength division multiplexing. The AWG consists of an input splitter, a dispersive waveguide array which creates the wavelength demultiplexing and multiplexing effects, and an output coupler. Because the dispersive waveguide array consists of bent waveguides, the size of an AWG is limited by the light loss in t...

Larger width of P-cladding layer in p-i-n waveguide of traveling wave electroabsorption modulator (TWEAM) results in lower resistance and microwave propagation loss which provides an enhanced high speed electro-optical response. In this paper, a fullvectorial finite-difference-based optical mode solver is presented to analyze mushroom-type TWEAM for the first time. In this analysis, the discont...

This paper demonstrates the design of an Arrayed Waveguide Gratings (AWG) based optical switch. In the design both physical and network layer analysis is performed. The physical layer power and noise analysis is done to obtain Bit Error Rate (BER). This has been found that at the higher bit rates, BER is not affected with number of buffer modules. Network layer analysis is done to obtain perfor...

We describe a novel scheme based on evanescent guided-wave coupling for optically interfacing between conventional fiber-optic and planar photonic crystal devices such as waveguides and resonant cavities. By considering the band structure of bulk photonic crystal slabs, we analyze the k space properties of a linear defect waveguide and establish a set of design rules to ensure efficient evanesc...