An optical device is provided. The optical device includes a fiber array and an optical assembly. The fiber array includes a common channel and a plurality of divided. channels arranged in parallel in a first direction and extending along a second direction, and the fiber array has a first surface from a top view perspective. The optical assembly is coupled to the first surface of the fiber array. The first surface and the common channel of the fiber array form an angle less than 90 degrees from the top view perspective.

A light coupling unit for use in an optical connector includes a waveguide alignment member that receives and aligns at least one optical waveguide. The light coupling unit includes a light redirecting member that has an input surface configured to receive input light from the end face of the optical wave guide. A curved reflective surface of the light redirecting member receives light from the input surface propagating along an input axis and redirects the light such that the redirected light propagates along a different redirected axis. An output surface of the light redirecting member receives the redirected light and transmits the redirected light as output light propagating along an output axis and exiting the light redirecting member. A curved intersection of the curved reflective surface and a first plane formed by the input and redirected axes has a radius of curvature. The curved reflective surface has an axis of revolution disposed in the first plane. The axis of revolution forms a first angle with the redirected axis which is non-zero. The waveguide alignment member is configured such that the end face of the optical wave guide is positioned at a location that is not a geometric focus of the curved reflective surface.

An in-fiber beam scanning system may comprise an input fiber to provide a beam, a feeding fiber comprising an imaging bundle with multiple cores embedded in a first cladding that is surrounded by a second cladding, and an in-fiber beam shifter that comprises a first multibend beam shifter coupled to the input fiber, a graded index fiber following the first multibend beam shifter, and a second multibend beam shifter following the graded index fiber and coupling into the feeding fiber. In some implementations, the first multibend beam shifter is actuated by a first amount and the second multibend beam shifter is actuated by a second amount to shift the beam in two dimensions and deliver the beam into one or more target cores in the imaging bundle.

An optical fiber connector has a lens component and a fiber component. The lens component has at least one lens and an opening with at least one V-groove therein. The at least one lens is associated with the at least one V-groove. The fiber component is configured to be partially inserted into the lens component and has at least one bare fiber flexible retention feature configured to retain a fiber of a fiber optic cable within the at least one V-groove and also to align the fiber with the lens.

The disclosure relates to an optical connection device reducing a connection loss between an SCF and an MCF. The optical connection device includes plural relay fibers and a capillary having third and fourth end faces. Each relay fiber includes a first core of Δ1, a second core of Δ2, and a cladding of Δ3. The capillary includes a tapered portion with an outer diameter ratio R of the fourth end face to the third end face of 0.2 or less. In each relay fiber, a value of Formula (V2−V1)/R falls within a range from 156% μm.sup.2 to 177% μm.sup.2, V1 (% μm.sup.2) is given by (π.Math.r1.sub.b.sup.2)×(Δ1−Δ2) by using a radius r1.sub.b (μm) of the first core, and V2 (% μm.sup.2) is given by (π.Math.r2.sub.b.sup.2)×(Δ1−Δ2) by using a radius r2.sub.b (μm) of the second core.

Disclosed are methods of providing a hermetically sealed optical connection between an optical fiber and an optical element of a chip and a photonic-integrated chip manufactured using such methods.

A process for terminating an optical fiber with a ferrule includes the steps of: (a) providing an optical fiber and ferrule with an end of the optical fiber extending beyond a surface of the ferrule; and (b) directing a jet comprising an air-abrasive mixture at the end of the optical fiber to cleave the end of the optical fiber from the remainder of the optical fiber.

A method of processing by controlling one or more beam characteristics of an optical beam may include: launching the optical beam into a first length of fiber having a first refractive-index profile (RIP); coupling the optical beam from the first length of fiber into a second length of fiber having a second RIP and one or more confinement regions; modifying the one or more beam characteristics of the optical beam in the first length of fiber, in the second length of fiber, or in the first and second lengths of fiber; confining the modified one or more beam characteristics of the optical beam within the one or more confinement regions of the second length of fiber; and/or generating an output beam, having the modified one or more beam characteristics of the optical beam, from the second length of fiber. The first RIP may differ from the second RIP.

The present invention relates to an optical fiber device for removing cladding light, an apparatus and a method for etching the same. The optical fiber device comprises: a first optical fiber section through an N.sup.th optical fiber section arranged in sequence along a light travelling direction; and a first tapered coupling section coupling a K.sup.th optical fiber section and a (K+1).sup.th optical fiber section, where the K.sup.th optical fiber section is any one of the first optical fiber section through the N.sup.th optical fiber section and the (K+1).sup.th optical fiber section is any one of the first optical fiber section through the N.sup.th optical fiber section adjacent to the K.sup.th optical fiber section, wherein the K.sup.th optical fiber section comprises: at least one first subsection and at least one second subsection alternately arranged along the light travelling direction, each of the at least one first subsection having a diameter D.sub.2K−1 and a length L.sub.2K−1; and each of the at least one second subsection having a diameter D.sub.2K and a length L.sub.2K; and a second tapered coupling section coupling the first subsection and the second subsection adjacent to the first subsection, wherein the diameter D.sub.2K−1 and the length L.sub.2K−1 of the first subsection and the diameter D.sub.2K and the length L.sub.2K of the second subsection of the K.sup.th optical fiber section and a diameter D.sub.2K+1 and a length L.sub.2K+1 of the first subsection and a diameter D.sub.2K+2 and a length L.sub.2K+2 of the second subsection of the (K+1).sup.th optical fiber section satisfy D.sub.2K−1>D.sub.2K, D.sub.2K+1>D.sub.2K+2, L.sub.2K−1>L.sub.2K+1, L.sub.2K>L.sub.2K+2 and D.sub.2K−1=D.sub.2K+1, and satisfy D.sub.2K>D.sub.2K+2 for odd K and D.sub.2K<D.sub.2K+2 for even K (where N is a natural number, and K is any natural number satisfying 1≤K≤N−1).

The present disclosure provides devices, systems, circuits, and effective methods for advanced optical applications using plasmonics and ENZ materials. The disclosure provides for enhancement of the optical tunability of phase and amplitude of propagating plasmons, nonlinear-optical effects, and resonant network in optical fiber tip nanocircuits and integrates the tunable plasmonic and ENZ effects for in-fiber applications to provide optical fiber with high operating speed and low power consumption. The invention yields efficient coupling of a plasmonic functional nanocircuit on the facet of an optical fiber core. The invention also can use gate-tunable ENZ materials to electrically and nonlinear optically tune the plasmonic nanocircuits for advanced light manipulation. The invention efficiently integrates and manipulates the voltage-tuned ENZ resonance for phase and amplitude modulation in optical fiber nanocircuits.