摘要:
An integrated optical component includes at least one input waveguide, at least one output waveguide; a first slab waveguide having a first refractive index, n1. The first slab waveguide may be disposed between at least one of the input waveguides and at least one of the output waveguides. The integrated optical component may further include a second slab waveguide having a second refractive index, n2. The integrated optical component may also include a third cladding slab having a third refractive index, n3. The third cladding slab may be disposed between the first slab and the second slab. The thickness of the second slab waveguide and the thickness of the third slab waveguide are adjustable to reduce a birefringence of the integrated optical component.
摘要:
A bent taper is provided that includes one or more waveguide bends, at least one of which has a tapering waveguide width along at least a portion thereof. In one embodiment, the bent taper is an S-shaped bent taper that is configured as a TE0-TE1 mode convertor. Such a bent taper can be combined with a linear bi-layer taper configured as a TM0-TE1 mode converter to form a TM0-TE0 polarization rotator.
摘要:
An imaging directional backlight apparatus including a waveguide, a light source array, for providing large area directed illumination from localized light sources. The waveguide may include a stepped structure, in which the steps may further include extraction features optically hidden to guided light, propagating in a first forward direction. Returning light propagating in a second backward direction may be refracted, diffracted, or reflected by the features to provide discrete illumination beams exiting from the top surface of the waveguide, in operation, luminance streaks and bright illumination regions may be formed due to undesirable imaging characteristics from the structure of the Fresnel mirror. Fresnel mirror draft facets and reflective facet microstructures are provided that achieve reduction of visibility' of light streaks and bright illumination regions.
摘要:
A wavelength selective switch apparatus is disclosed, which comprises: a plurality of optical ports configured to emit input light beams to a switching module and receive output light beams from the switching module; and the switching module configured to receive the input light beams, select, according to a wavelength component of the input light beams, at least one of the plurality of optical ports to which the output light beams of the wavelength component are to propagate, and output the output light beams of the wavelength component to the selected at least one optical port, the switching module comprising: a polarization modulation element including an array of a plurality of liquid crystal (LC) pixels; a polarizer; and a steering element including an array of a plurality of liquid crystal on silicon (LCOS) pixels.
摘要:
La présente invention concerne un système interférométrique à fibre optique comprenant une source de lumière (1), une bobine de fibre optique (8), un séparateur de bobine (3), un photodétecteur (2) et des moyens de filtrage en polarisation. Selon l'invention, les moyens de filtrage en polarisation comprennent un premier polariseur à guide d'onde (51), au moins un deuxième polariseur à lame mince (52) et une section de guide d'onde optique (12), le au moins un autre polariseur (52) étant intercalé dans la zone de Rayleigh entre d'une part une première extrémité (21) de guide d'onde du premier polariseur (51) et d'autre part une seconde extrémité (22) de guide d'onde de ladite section de guide d'onde optique (12).
摘要:
A photonic integrated circuit (10) comprises an input interface (12) adapted for receiving an optical input signal and splitting it into two distinct polarization modes and furthermore adapted for rotating the polarization of one of the modes for providing the splitted signals in a common polarization mode,. The PIC also comprises a combiner (16) adapted for combining the first mode signal and the second mode signal into a combined signal and a decohering means (15) adapted for transforming at least one of the first mode signal and the second mode signal such that the first mode signal and the second mode signal are received by the combiner in a mutually incoherent state. A processing component (17) for receiving and processing said combined signal is also comprised.
摘要:
Various embodiments provide a waveguide-based polarization rotator that comprises top and bottom claddings of substantially the same material. In some embodiments, the waveguide-based polarization rotator converts between Transverse Electric (TE) and Transverse Magnetic (TM) modes.