Abstract: A waveguide-mode (WM) coupler having a plurality of single-mode fibers, each optically coupled to a different respective waveguide mode of a multimode fiber. The coupling optics employed by the WM coupler are scalable and include reflective fiber-tip coatings, polarization beam splitters, phase masks, and quarter-wave plates configured to overlap and/or separate the optical beams corresponding to different waveguide modes of the multimode fiber in a manner that does not cause a significant increase in the optical insertion losses with an increase in the number of optical channels in the WM coupler.

Abstract: A method for density error correction is disclosed. In one embodiment, the method includes a) calculating an average density error for at least one row of an image considering density errors for printhead elements employed to print the at least one row, and a number of passes that the printhead elements will utilize to print the at least one row, b) calculating a density error correction value for the at least one row considering the average density error, and c) applying the density error correction value to adjust ink flow from the printhead elements while printing the at least one row.

Abstract: Electronic devices are provided that communicate over cables and other communications paths that include optical and electrical paths. A cable may include wires for forming an electrical path and one or more optical fibers for forming an optical path. Connectors at one or both ends of the cable may include electrical contacts and an optical coupling structure associated with the optical path. Optical paths may be included in connectors such as tip-ring-sleeve connectors and connectors of other types. Interface circuitry may be included in a connector to convert between optical and electrical signaling schemes. Wavelength-division-multiplexing may be used to support bidirectional communications. Breakout boxes and other equipment may be connected using the cables. Digital signals such as digital noise cancellation signals may be conveyed over the optical paths. Power and other electrical signals may be conveyed over the electrical paths.

Abstract: Various embodiments include large cores fibers that can propagate few modes or a single mode while introducing loss to higher order modes. Some of these fibers are holey fibers that comprising cladding features such as air-holes. Additional embodiments described herein include holey rods. The rods and fibers may be used in many optical systems including optical amplification systems, lasers, short pulse generators, Q-switched lasers, etc. and may be used for example for micromachining.

Abstract: An optical fiber connector includes a shell, a lens and a strengthening unit. The shell includes a blind hole extended along a first direction for receiving a fiber and a through hole communicated with the blind hole and extended along a second direction perpendicular to the first direction. The lens is formed on the shell to align with a bottom of the blind hole. The lens is capable of optically coupling with the fiber in the blind hole. The strengthening unit is formed in the through hole.

Abstract: There are provided optical fiber configurations that provide for the delivery of laser energy, and in particular, the transmission and delivery of high power laser energy over great distances. These configurations further are hardened to protect the optical fibers from the stresses and conditions of an intended application. The configurations provide means for determining the additional fiber length (AFL) need to obtain the benefits of such additional fiber, while avoiding bending losses.

Abstract: A ring resonator has a first optical waveguide arranged in a loop, a second optical waveguide tangentially connected to the first optical waveguide, and an electrical coil inductively coupled to the first optical waveguide.

Abstract: The present invention relates to optical-fiber modules having improved accessibility. In a typical embodiment, the optical-fiber module includes one or more optical fibers surrounded by an intermediate layer. The intermediate layer typically includes a polymeric medium with a liquid lubricant dispersed therein. A buffer tube encloses the optical fibers and the intermediate layer.

Abstract: A crush-resistant fiber optic cable is disclosed, wherein the cable includes a plurality of optical fibers. The fibers are generally arranged longitudinally about a central axis, with no strength member arranged along the central axis. A tensile-strength layer surrounds the plurality of optical fibers. A protective cover surrounds the tensile-strength layer and has an outside diameter DO in the range 3 mm?DO?5 mm.

Abstract: The invention relates to an optical backplane, comprising a plurality of component connectors and at least two interconnections configurations interconnecting the component connectors. The at least two interconnections configurations allow a dynamical selection of an interconnections configuration interconnecting the component connectors.

Abstract: To achieve high-speed optical modulation using a crystal having a complicated refractive index characteristic with respect to applied electric field, provided is an optical device comprising a substrate; a dielectric film that is formed on the substrate and includes a first optical waveguide and a second optical waveguide that run parallel to each other; a transmission line that is formed on the dielectric film and includes a signal line arranged between the first optical waveguide and the second optical waveguide, a first bias electrode, and a second bias electrode, the first bias electrode and the second bias electrode arranged respectively in a first region that is on a side of the first optical waveguide opposite the second optical waveguide and a second region on a side of the second optical waveguide opposite the first optical waveguide; and a drive circuit section that respectively applies a first bias voltage and a second bias voltage differing from each other to the first bias electrode and the secon

Abstract: Provided is an optical modulator that modulates input light with a high frequency and low half-wave voltage. An optical device comprises a substrate; a dielectric film that is formed on the substrate and includes a first optical waveguide and a second optical waveguide that run parallel to each other; an insulating film formed on the dielectric film; a coplanar line that is formed on the insulating film and includes a signal line arranged between the first optical waveguide and the second optical waveguide, a first ground line arranged in a first region, and a second ground line arranged in a second region; and auxiliary electrodes that are arranged in the first region and the second region, are formed in contact with the dielectric film or within the insulating film, and apply bias voltages to the first optical waveguide and the second optical waveguide.

Abstract: A graded index multimode optical fiber (10) includes: a core (11) having an outside diameter of 45-65 ?m; a first cladding (12) surrounding the core (11); a second cladding (13) surrounding the first cladding (12) and made of a material having a lower refractive index than the first cladding (12); and a third cladding (14) surrounding the second cladding (13) and made of a material having a higher refractive index than the second cladding (13). The ratio of the outside diameter of the first cladding (12) to the outside diameter of the core (11) is 1.15-1.25.

Abstract: There are provided an unbalanced Mach-Zehnder interferometer and a modulator based thereupon. The interferometer comprises a loop comprising a plurality of cascaded segments of polarization-maintaining fibers, into which an input signal is split such that two light portions of the split signal propagate concurrently in mutually opposite directions along the loop; and a first optical arrangement between a first and a second segment of the loop for rearranging the axes of propagation of the two light portions such that, on at least a one segment, the two light portions propagate along mutually orthogonal polarization axes of the polarization-maintaining fiber. The light portions are then recombined to mutually interfere. Birefringence of the segment(s) where the light portions propagate on mutually orthogonal polarization axes then provides a differential path length of the interferometer. An unbalanced Mach-Zehnder modulator is obtained by inserting a phase modulator within the loop.

Abstract: A fiber to wafer interface system includes an interface device comprising a flexible substrate portion, a flexible cladding portion arranged on the substrate portion, a flexible single-mode waveguide portion arranged on the cladding portion including a substantially optically transparent material, a connector portion engaging a first distal end of the flexible substrate portion, the connector portion operative to engage a portion of an optical fiber ferrule, a wafer portion comprising a single mode waveguide portion arranged on a portion of the wafer, an adhesive disposed between a portion of the single mode waveguide portion of the body portion and the single mode waveguide portion of the wafer portion, the adhesive securing the body portion to the wafer portion.

Abstract: Ferrule retainers for retaining and supporting fiber optic ferrules in an optical fiber connector are disclosed. In one embodiment, the ferrule retainers include one or more access windows for accessing an alignment feature(s) of the ferrule located inside the ferrule retainer when the ferrule is assembled in the ferrule retainer. In this manner, the alignment feature(s) of the ferrule is accessible for referencing, if desired, when processing (e.g., polishing) the optical fiber(s) disposed in the ferrule when the ferrule is assembled in the ferrule retainer. The access window(s) provided in the ferrule retainers allows fiber processing equipment to reference the alignment feature(s) of the ferrule when assembled in a ferrule retainer regardless of whether the fiber processing equipment also references the ferrule retainer to reference the ferrule. The embodiments disclosed herein also include related fiber optic connector assemblies, connectors, and referencing methods.

Abstract: An acoustic sensor includes a diaphragm having a reflective element. The sensor has an optical fiber positioned relative to the reflective element such that light emitted from the optical fiber is reflected by the reflective element. A first end of the optical fiber and the reflective element form an optical cavity therebetween. The acoustic sensor further includes a structural element mechanically coupled to the diaphragm and the optical fiber. The structural element includes a material having a coefficient of thermal expansion substantially similar to the coefficient of thermal expansion of the optical fiber. For example, the material can be silica.

Abstract: An optical fiber coupling device and a method are disclosed. The optical fiber coupling device includes a first patch strip having a first plurality of optical fiber connectors arranged along a face of the first patch strip and a second patch strip having a second plurality of optical fiber connectors arranged along a face of the second patch strip. The first and second patch strips are in a stacked arrangement where the second plurality of optical fiber connectors is offset from the first plurality of optical fiber connectors in a first and a second direction transverse to a stacking direction. The offsetting improves access to the individual optical fiber connectors which assists an operative when managing or maintaining optical fiber connections and helps to reduce the likelihood of fatigue or failure since adjacent optical fiber connections are undisturbed during this process and the optical fiber connections may be easily accessed without needing to move or manipulate adjacent patch strips.

Abstract: An optical fiber having both low macrobend loss and low microbend loss. The fiber has a first inner cladding region having an outer radius r2>8 microns and refractive index ?2 and a second outer cladding region surrounding the inner cladding region having refractive index ?3, wherein ?1>?3>?2. The difference between ?3 and ?2 is greater than 0.01. The fiber exhibits a 22 m cable cutoff less than or equal to 1260 nm, and r1/r2 is greater or equal to 0.25.

Abstract: A liquid ejector includes a substrate, a heating element, a dielectric material layer, and a chamber. The substrate includes a first surface. The heating element is located over the first surface of the substrate such that a cavity exists between the heating element and the first surface of the substrate. The dielectric material layer is located between the heating element and the cavity such that the cavity is laterally bounded by the dielectric material layer. The chamber, including a nozzle, is located over the heating element. The chamber is shaped to receive a liquid with the cavity being isolated from the liquid.