Wave optic modeling of semi-transparent textured curved surfaces.

Lightwave propagation through a multilayer structure of patterned semi-transparent curved surfaces is a fundamental issue for various display applications from practical industrial problems such as moiré pattern strain in touch panel displays to fundamental research issues in layered tensor displays and layered complex modulation holographic displays. In this paper, a wave optic modeling of multiple layers of patterned semi-transparent curved surfaces is presented. The proposed wave optic modeling is based on the algorithmic framework used in the field of polygon computer-generated holograms, a framework which can additionally devise the characteristic transmittance function of textured curved surfaces.

Quantitative modal analysis of optical power flow and energy loss in photonic structures with a dipole emission source.

Fourier modal method based quantitative analysis method of optical power flow and energy loss in general multi-block photonic structures with an internal dipole emitter is described. The analytic expressions of modal power flow and loss are derived for accurate and efficient quantitative analysis. It is revealed that a few dominating excited photonic modes substantially govern the internal energy flow and energy loss.

Modal power decomposition of beam intensity profiles into linearly polarized modes of multimode optical fibers.

We calculate the modal power distribution of a randomly and linearly polarized (LP) multimode beam inside a cylindrical fiber core from knowledge of spatial-intensity profiles of a beam emitted from the fiber. We provide an exact analysis with rigorous proofs that forms the basis for our calculations. The beam from the fiber end is collimated by a spherical lens with a specific focal length.

Electrically controllable in-line-type polarizer using polymer-dispersed liquid-crystal spliced optical fibers.

The polarization-dependent transmission of light through an electrically controllable in-line-type polarizer that is made from polymer-dispersed liquid-crystal spliced optical fibers is discussed experimentally and theoretically. This in-line-type optical splicing method has the advantage of low transmission loss when it is applied in optical fiber communication systems. An anomalous diffraction approach is used to compute the scattering cross section of polymer-dispersed liquid-crystal droplets.

Characteristics of short-period blazed fiber Bragg gratings for use as macro-bending sensors.

The characteristics of short-period blazed fiber Bragg gratings for use as macro-bending sensors are discussed. This sensor is able to detect macro bending with the transmitted power variation of the first side mode in the blazed fiber Bragg grating. Since an incident ray experiences different variations of tilt angles with respect to bending direction, the blazed fiber Bragg grating has different coupling efficiencies of the first side mode, which can be reduced considerably in the case of twisted blazed fiber Bragg gratings.