摘要:
An optical coupling may involve orienting a waveguide and a lens such that light rays are focused on a surface. The lens may involve the use of a material having a variable refractive index to focus rays of light along first axis and a curved surface to focus the rays of light along a second axis.
摘要:
An optical fiber coupler configured to couple signal beams into a non-circularly shaped output optical beam or device is provided. The coupler includes an adiabatically tapered optical device. The tapered optical device has a core taper ratio equal to the ratio between a second core diameter and a first core diameter and a mode taper ratio equal to the ratio between a second mode field diameter and a first mode field diameter. The mode taper ratio is greater than the core taper ratio. A spacing between adjacent cores at the output end is less than a spacing between adjacent cores at the input end by approximately the core taper ratio, thereby increasing brightness of a combined output optical signal relative to the combined brightness of the plurality of input optical fibers by approximately a factor equal to the ratio of the mode taper ratio to the core taper ratio.
摘要:
According to embodiments of the present invention, an optical arrangement is provided. The optical arrangement includes a support substrate; at least one optical fiber arranged on the support substrate; at least one waveguide arranged on the support substrate and adjacent to the at least one optical fiber; the at least one waveguide defining a light propagation direction; and at least one grin index lens arranged asymmetrically relative to the light propagation direction such that light is coupled from the at least one optical fiber through the at least one grin index lens to the at least one waveguide.
摘要:
The invention relates to an array of waveguides (1) comprising a set of coupled waveguides that are substantially parallel and oriented in a guidance direction (Y), the set of waveguides comprising a first zone (2) formed by waveguides coupled according to a first coupling coefficient, and a second zone (3) formed by waveguides coupled according to a second coupling coefficient that is different from the first coupling coefficient, characterized in that the second coupling coefficient is different from the first coupling coefficient in the guidance direction and in the direction (X) perpendicular to the guidance direction.
摘要:
To realize a diffusion film in which arbitrary control of the diffuse light intensity distribution characteristics, and an angular range of diffusion does not change with respect to an incoming light from a specific angular range and a light-outgoing direction converting element that is high in efficiency of conversion of the outgoing direction, and has no limit in the angle of conversion of the outgoing direction, and to provide a thin-model high-quality projection display using the same as a screen.
摘要:
Methods for the production of integrated optical waveguides which have a patterned upper cladding with a defined opening to allow at least one side or at least one end of a light transmissive element to be air clad The at least one side or at least one end is, for preference, a lens structure unitary with the waveguide or a bend.
摘要:
A focusing device with a refractive index profile changing from the center of the focusing device towards its perimeter, is made of a material wherein the lateral refractive index distribution of the focusing device material is homogeneous and wherein the focusing device comprises holes for introducing a graded refractive index profile. This allows accurate control of the graded refractive index profile.
摘要:
Disclosed herein is an optical waveguide comprising a core layer to be an optical transmission region, an upper clad layer and a lower clad layer covering the core layer, in which the core layer, the upper clad layer and the lower clad layer are formed from resin materials, characterized in that a microlens made of a material having a higher refractive index than that of a material constituting said core layer is disposed in the vicinity of an end face of said core layer.
摘要:
Optical waveguides with integrated collimating lenses and/or reflectors or mirrors are disclosed. The waveguides can include a convex collimating lens disposed at an end of the core. An integrated reflecting device may be inserted into the core so that at least a portion of the signal is directed upward through a convex collimating lens disposed above the upper cladding and core for power monitoring. An additional integrated reflecting device may be incorporated beyond a distal end of the core of the waveguide for power monitoring. The lenses and reflective devices or mirrors are made using reflow techniques and therefore do not require the use of separate, prefabricated components.
摘要:
Integrated optical waveguides and methods for the production thereof which have a patterned upper cladding with a defined opening to allow at least one side or at least one end of a light transmissive element to be air clad. The at least one side or at least one end is, for preference, a lens structure unitary with the waveguide or a bend. Also provided is a method of fabricating an optical waveguide with a patterned cladding which comprises forming a patterned blocking layer opaque to a predetermined wavelength on a portion of a substrate transparent to the predetermined wavelength; depositing a core layer on said patterned blocking layer and/or on an uncovered portion of the substrate; patterning the core layer from above to provide a light transmissive element; depositing an upper cladding layer, which comprises a material curable by exposure to light of the predetermined wavelength, on the light transmissive element, and/or on the patterned blocking layer and/or on an uncovered portion of the substrate; irradiating said upper cladding layer from below with light of the predetermined wavelength, to cure those portions of said upper cladding layer not positioned above said patterned blocking layer; and removing non-cured portions of said upper cladding layer.