Laser gain media offer a limited number of radiative wavelengths. With the continued
development of laser applications, there has grown a need for a diversity of laser …

Entangled photon pairs are a critical resource in quantum communication protocols ranging
from quantum key distribution to teleportation. The current workhorse technique for …

Lithium niobate (LiNbO3) is a material that has drawn great interest in nonlinear optics
because of its large nonlinear susceptibility and wide transparency window. However, for …

We discuss the development of quantum optical coherence tomography (Q-OCT), an
imaging modality with a number of potential applications. Although Q-OCT is not expected to …

One promising technique for working toward practical photonic quantum technologies is to
implement multiple operations on a monolithic chip, thereby improving stability, scalability …

We demonstrate second harmonic generation in quasi phase-matched waveguide
structures fabricated by direct laser writing. Circular waveguides are inscribed in z-cut …

In this chapter we review the process of parametric down-conversion (PDC) and discuss the
different methods to use PDC as a heralded single-photon source. PDC is a non-linear …

We propose a scheme for the generation of counterpropagating polarization-entangled
photon pairs from a dual-periodically-poled crystal. Compared with the usual forward-wave …

Nonlinear photonic crystals are capable of highly efficient nonlinear wavefront manipulation,
providing a promising platform for compact and large-scale integrated nonlinear devices …

Although χ^(2) nonlinear optical processes, such as difference frequency generation (DFG),
are often used in conjunction with fiber lasers for wavelength conversion and photon-pair …