A system including an optical transmitter. In some embodiments, the system includes: a first array of lasers; a first wavelength multiplexer, connected to the first array of lasers; a first coupler, connected to the wavelength multiplexer; and a first wavelength meter, connected to a first output of the first coupler.

An optical circuit for routing a signal includes a coupler and first and second waveguides. The coupler has an input for the signal and has first and second outputs. The first waveguide has a first optical connection to the first output, and the second waveguide has a second optical connection to the second output. Both waveguides have the same propagation length. The first and second waveguides include different widths at the respective optical connections to the respective outputs. This coupler can be used with another input couplers, two additional waveguides, and two 2×2 output couplers to provide a 90-degree hybrid for mixing signal light and local oscillator light in a coherent receiver or the like.

A spectral beam combining (SBC) fiber laser amplifier system including a beam shaper array assembly and a beam source that provides a plurality of beams having a low fill factor profile. The assembly includes an input beam shaper array having a plurality of input cells positioned adjacent to each other that are shaped to cause the beams to expand as they propagates away from the input array to be converted from the low fill factor profile to a high fill factor profile and be tapered to a lower value at a perimeter of each input array cell. The assembly further includes an output beam shaper array having a plurality of output cells positioned adjacent to each other that are shaped to cause the beams to stop expanding so that the output array provides a plurality of adjacent beams with minimal overlap and a minimal gap between the beams.

An optical circuit for routing a signal includes a coupler and first and second waveguides. The coupler has an input for the signal and has first and second outputs. The first waveguide has a first optical connection to the first output, and the second waveguide has a second optical connection to the second output. Both waveguides have the same propagation length. The first and second waveguides include different widths at the respective optical connections to the respective outputs. This coupler can be used with another input couplers, two additional waveguides, and two 2×2 output couplers to provide a 90-degree hybrid for mixing signal light and local oscillator light in a coherent receiver or the like.

The present invention relates to a scanner provided with a vibratory beam on or in which is formed a phased array intended to extract according to either one of two parallel faces of the beam a light radiation that could be emitted by a light source.

A device for concentrating an electromagnetic wave includes a waveguide array that includes a central waveguide having a first refractive index and a central axis and feeder waveguides disposed around the central waveguide. Each feeder waveguide has a second refractive index. The waveguide array also includes a support structure coupled to the waveguide arrays and configured to, in a deployed configuration, retain the feeder waveguides of the waveguide array in a substantially symmetric arrangement with respect to the central waveguide to enable concentration of an electromagnetic wave of a particular wavelength in the central waveguide via electromagnetic coupling of the central waveguide with each of the feeder waveguides, with the respective axis of each feeder waveguide oriented substantially parallel to the central axis of the central waveguide and with each feeder waveguide spaced apart from the central waveguide by a distance that is based on the particular wavelength.

A return loss in an optical connector connection structure according to a lens scheme is reduced. An optical connector (10) according to this disclosure, includes: a plurality of optical fibers (18) arranged in an array; and a lens array plate (14) that includes a first principal surface (40) with a plurality of lenses (44) corresponding to the respective optical fibers being formed on this surface, and a second principal surface (41) joined to end faces (180) of the optical fibers so as to be opposed to the first principal surface and optically coupled to the optical fibers to which the respective lenses correspond, wherein at least one of the end faces of the optical fibers and the second principal surface is inclined from a plane (182) perpendicular to optical axes (181) of the optical fibers.

An optical device. In some embodiments, the optical device includes a first interface; a second interface; a first plurality of waveguides, at the first interface; a second plurality of waveguides, at the second interface; and a free propagation region. A first waveguide of the first plurality of waveguides has a width at least 20% greater than a second waveguide of the first plurality of waveguides.

An optical communication element includes a plurality of slabs, an input port group, an output port group, a first waveguide group, and a second waveguide group. The plurality of slabs includes third waveguide. Each of the plurality of slabs include a predetermined number of first ports being arranged at an inlet the third waveguide at equal intervals in a lateral direction perpendicular to a light traveling direction, and input the optical signals, and a predetermined number of second ports being arranged at an outlet of the third waveguide at the equal intervals in the lateral direction so as to face the first ports, and output the optical signals. Each of the third waveguides are configured with a dimension that allows light intensity to be distributed at all traveling positions located in the lateral direction.

A plurality of bandpass filters (2) are arranged side by side in a row on a fixed surface (1a) of a glass block (1) and fixed using an adhesive (3). Each bandpass filter (2) includes a coating film (6) for transmitting or reflecting light depending on a wavelength. Each bandpass filter (2) includes a first surface (2a) fixed to the fixed surface (1a), and a second surface (2b) opposite to the first surface (2a) and having a width larger than that of the first surface (2a). Opposing side surfaces of the adjacent bandpass filters (2) include a first portion (2c) on the first surface (2a) side and a second portion (2d) on the second surface (2b) side. A spacing between the first portions (2c) of the adjacent bandpass filters (2) is wider than a spacing between the second portions (2d) of the adjacent bandpass filters (2).