Bahaa E. A. Saleh

Photonic Circuits for Quantum Information Processing in Two-Mode Integrated Diffused-Channel Waveguides

We present designs of photonic circuits for the generation, separation, and manipulation of modal, polarization, and spectral photonic qubits generated in two-mode diffused-channel Ti:LiNbO3 waveguides via spontaneous parametric downconversion.

Generation and Analysis of Entangled Two-Photon States in Spatial-Parity Space

We demonstrate the generation of two-photon states entangled in the parity of their transverse spatial coordinates. Continuous superpositions of the |Φ+> and |Ψ+> Bell states are synthesized and analyzed with simple linear optical components.

Engineering Robust Optical Entanglement for Quantum Communication

A robust source of polarization-entangled photons for quantum communication at telecom wavelength is implemented. The benefits of using Superconducting Photon Counting Detectors (SSPD) have been evaluated.

Quantum Cryptography with Optical Entanglement at 1.5 μm

We report on the engineering, preparation, and utilization of polarization entangled-photon states in the telecommunications window of 1.5 μm for secure quantum key distribution.