Design and evaluation of a large-scale autostereoscopic multi-view laser display for outdoor applications.

State-of-the-art autostereoscopic displays often do not comply with mandatory requirements for outdoor use, because of their limitations in size, luminance, number of 3D viewing zones, and maximum 3D viewing distances. In this paper we propose a concept for a modular autostereoscopic multi-view laser display with sunlight readable luminance, theoretically up to several thousand 3D viewing zones, and maximum 3D viewing distances of up to 70 meters. Each picture element contains three laser diodes, a cylindrical microlens, as well as a MEMS mirror, which deflects the collimated light beams to the left and right eyes of multiple viewers in a time-multiplexed manner.

Development and characterization of optoelectronic circuit boards produced by two-photon polymerization using a polysiloxane containing acrylate functional groups.

Research into the integration of optical interconnects in printed circuit boards (PCBs) is rapidly gaining interest due to the increase in data transfer speeds now required along with the need for miniaturized devices with increased complexity and functionality. We present a method that involves embedding optoelectronic components in a polymeric material and fabricating optical waveguides in one step. A silanol-terminated polysiloxane cross-linked with an acryloxy functional silane is utilized as a matrix material into which the 3D optical waveguides are inscribed by two-photon-induced polymerization.

Transient fields in the input coupling region of optical single-mode waveguides.

We investigate numerically the optical field in the region immediately behind the input facets of dielectric step-index single-mode slab and fiber waveguides. Visualization of the intensity distributions gives insight into the formation of the fundamental mode and of radiation modes. For a more quantitative characterization we determine the amount of optical power and mode purity of the field in core vicinity as a function of propagation distance.

Two-dimensional optical beam deflector operated by wavelength tuning.

A new method based on an optical delay line structure is proposed for two-dimensional raster optical beam steering. For one-dimensional beam steering, the laser beam to be deflected is split into N co-directional sub-beams of equal intensity with the aid of a plane-parallel plate. These sub-beams experience a relative time delay, which translates into a phase difference, thus forming a phased array.

Minimum length of a single-mode fiber spatial filter.

Using the concept of leaky modes, we derive the minimum length of a single-mode fiber required to act as a spatial-mode filter of given quality. The degree of filter action is defined by the ratio of power carried by the fundamental mode to that carried by the leaky modes.

Alignment tolerances for plane-wave to single-mode fiber coupling and their mitigation by use of pigtailed collimators.

We discuss the efficiency with which coherent plane waves can be coupled to single-mode fibers in the presence of deterministic or stochastic misalignments of the fiber relative to the focal point of a lens. We point out how the alignment demands can be relaxed by means of graded-index-lens fiber-pigtailed collimators.