Abstract: There is provided an electro-optic modulator comprising: a substrate having a first channel of waveguide material embedded therein, the substrate and the waveguide material together providing a substantially flat upper surface, a first insulative layer on and across the upper surface; a graphene layer arranged on the first insulative layer and over at least a first portion of the first channel of waveguide material; and a second insulative layer provided on and across the graphene layer; wherein the graphene layer provides a first electrode, and wherein a, preferably non-graphene, second electrode is either: (i) provided on the second insulative layer at least overlapping the first portion of the first channel of waveguide material, or (ii) provided within the substrate at least underlapping the first portion of the first channel of waveguide material.

Abstract: Provided are a method for determining parameters of a waveguide core in an optical-electronic printed circuit board, an optical-electronic printed circuit board, an electronic device, and a storage medium. The method includes: determining, according to a refractive index of a material from which the waveguide core is made and a refractive index of a material from which a base layer is made, a critical angle of total reflection at an interface between the waveguide core and the base layer; and determining the parameters of the waveguide core according to a relative positional relationship between one end port of the waveguide core and the other end port of the waveguide core in the optical-electronic printed circuit board, a condition of a region through which the waveguide core passes, and the critical angle, so that steering of the waveguide core is achieved without introducing a curved surface to the waveguide core.

Abstract: Systems and methods are provided for optical devices having a field-effect transistor (FET) for optical tuning. Examples include a device layer formed on a substrate and comprising a first material, and a FET formed on the substrate. The MOSFET comprises a drain formed in the device layer comprising a first doped region, a source formed in the device layer comprising a second doped region, a gate comprising a second material formed on the device layer, and a conductive channel formed in the device layer based on a voltage bias applied to the gate. An optical waveguide is formed between the gate and the conductive channel.

Abstract: A method includes electrostatically poling a ferroelectric electro-optic (“EO”) layer and heating the ferroelectric EO layer to a temperature of at least 50 degrees Celsius during the electrostatically poling the ferroelectric EO layer.

Abstract: Programmable waveguide devices and associated methods are described. The waveguide devices can be programmed to operate as an optical switch, an optical attenuator, an interferometer, a mode transformer, an optical computer or other devices. An example programmable waveguide device includes a grid where an electro-optic material is positioned between a plurality of top and bottom electrodes that each form a pair of electrodes as part of a grid element. The programmable waveguide device also includes input ports and output ports; the latter output one or more beams produced from the one or more input beams after propagation through the grid. Each grid element can receive a voltage across the electro-optic material of the grid element, which exhibits different indices of refraction depending on the voltage. The grid elements are thus configurable to produce regions within the grid with varying indices of refraction based on the voltage.

Abstract: An optical isolator core includes: a first birefringent crystal, a Faraday rotator, a second birefringent crystal, and a third birefringent crystal that are successively arranged along a forward optical path. In response to forward o light and forward e light successively traveling through the aforementioned optical elements, displacements of exit points of the forward o light and the forward e light with respect to an incident point are the same, and the forward o light and the forward e light are merged as exiting forward light. In response to backward o light and backward e light successively reversely traveling through the aforementioned optical element, displacements of exit points of the backward o light and the backward e light with respect to the incident point of the forward light causes the backward o light and the backward e light to deviate from the forward optical path.

Abstract: An ultraviolet optical transmission system, in which light with an ultraviolet band is transmitted along an optical transmission path formed of a quartz-based optical fiber, and includes an optical transmission unit that is switched by a rotation mechanism in which an optical transmission path of one of an optical coupling unit rotates about an axis. The optical coupling unit includes an optical transmission path including a plurality of optical transmission units on the same circumference from a center on an end surface of the optical coupling unit; an optical transmission path in which the optical transmission units are arranged on the same circumference as a circumference on which the plurality of optical transmission units are arranged; two ferrules each containing the two optical transmission paths; and a cylindrical sleeve in which the two ferrules are inserted in a hollow.

Abstract: An optical ferrule for transmitting and propagating light having a predetermined wavelength includes a polymeric ferrule body having a fiber alignment feature for receiving an optical fiber, a redirecting side for redirecting light, and an output side window for exiting light therethrough. A multilayer anti-reflection film is disposed on the output side window and includes at least two first layers including titanium oxide and at least two second layers including silicon dioxide. At least one of the two first layers is thinner than an optimum thickness that would minimize reflection at the predetermined wavelength. Heating the optical ferrule at a temperature of about 85 degrees centigrade for at least five hours results in no, or very little, damage to the multilayer anti-reflection film.

Abstract: An embodiment photonic device may include a first terminal including silicon and a waveguide structure optically connected with the first terminal, a cladding dielectric layer formed around the first terminal including the waveguide structure, a second terminal including polysilicon, and a capacitor dielectric layer disposed between the first terminal and the second terminal. The capacitor dielectric layer may include a SiON layer. The waveguide structure may include a first index of refraction in response to an application of a first voltage difference between the first terminal and the second terminal and a second index of refraction in response to an application of a second voltage difference between the first terminal and the second terminal. The silicon of the first terminal may include a p-typed doping and the polysilicon of the second terminal may include an n-type doping.

Abstract: The invention relates to an assembly for optical coupling and for mode-selective separation or overlaying of optical fields, to the use thereof and to a method for producing a waveguide-based optical coupling element (10) which is designed for mode-selective separation or overlaying of optical fields at a further optical coupling point (410) of an optical component (400).

Abstract: Disclosed is an optical module that improves optical coupling efficiency. Embodiments of the present invention provide an optical module including a first photonic device comprising a first emitting surface emitting an optical signal having a predetermined wavelength and intensity; a second photonic device comprising a first incident surface where the optical signal having the predetermined wavelength is incident; and a first intermediate layer comprising a first receiving surface receiving an optical signal delivered from the first photonic device and a first transmitting surface transmitting an optical signal to the outside and formed with a material having at least one of predetermined physical, mechanical, thermal, and optical properties between the first emitting surface and the first incident surface for transmission of an optical signal passing through the first receiving surface and the first transmitting surface.

Abstract: Embodiments herein describe a method for selectively filtering different wavelengths of optical signals received from an optical channel using cascaded ring resonators, each of the cascaded ring resonators having a first ring and a second ring. The first ring has a varying waveguide width along its length configured to form a first waveguide width portion and a second waveguide width portion, the first waveguide width portion having a greater width than the second waveguide width portion. The second ring has a varying waveguide width along its length configured to form a third waveguide width portion and a fourth waveguide width portion, the fourth waveguide width portion having a greater width than the third waveguide width portion. The method further connects receivers to respective cascaded ring resonators, each of the receivers having a photodetector configured to differentiate between the optical signals.

Abstract: An optical attenuating structure is provided. The optical attenuating structure includes a substrate, a waveguide, doping regions, an optical attenuating member, and a dielectric layer. The waveguide is extended over the substrate. The doping regions are disposed over the substrate, and include a first doping region, a second doping region opposite to the first doping region and separated from the first doping region by the waveguide, a first electrode extended over the substrate and in the first doping region, and a second electrode extended over the substrate and in the second doping region. The first optical attenuating member is coupled with the waveguide and disposed between the waveguide and the first electrode. The dielectric layer is disposed over the substrate and covers the waveguide, the doping regions and the first optical attenuating member.

Abstract: An optical system includes a connector, an optical filter, an optical receiving device, an optical transmission device, and a central processing and transmission unit. The connector is configured for routing optical signals. The optical filter is configured for routing optical signals to and from the connector. The optical receiving device is configured for receiving optical signals routed from the optical filter via the connector. The optical transmission device is configured for generating the optical signals routed from the optical filter via the connector. The central processing and transmission unit is in electrical communication with the optical receiving device.

Abstract: A connector for connecting a cable to a cabinet in a manner that enhances feeding of a fiber through the connector includes first and second portions. The first portion is configured to be rotatingly coupled with the second portion; passageways in the first and second portions are configured to be positioned at a first angle relative to each other in a first position and at a second angle relative to each other in a second position; the first and second angles are different angles; the passageways in the first position are configured so as to enhance feeding of the fiber of the cable through the connector for connection of the cable to a cabinet; and the first portion is configured to be secured to the second portion in the first position so as to enhance feeding of the fiber through the connector for connection of the cable to the cabinet.

Abstract: Structures including a photonics chip and a cavity-mounted laser chip, and methods of forming such structures. The structure comprises a photonics chip including a substrate and a cavity in the substrate, a laser chip including a body inside the cavity, a first anchor disposed inside the cavity adjacent to a first corner of the body of the laser chip, and a second anchor disposed inside the cavity adjacent to a second corner of the body of the laser chip. The first and second anchors are configured to attach the laser chip to the photonics chip.

Abstract: Structures for an optical switch and methods of forming such structures. The structure comprises a first waveguide core including a first portion and a second portion, a second waveguide core including a first portion and a second portion, a ring resonator having a first portion adjacent to the first portion of the first waveguide core and a second portion adjacent to the first portion of the second waveguide core, and an optical coupler coupled to the second portion of first waveguide core and the second portion of the second waveguide core. The first portion of the ring resonator is spaced from the first portion of the first waveguide core by a first gap over a first light coupling region, and the second portion of the ring resonator is spaced from the first portion of the second waveguide core by a second gap over a second light coupling region.

Abstract: In one embodiment, an optical module includes an electronic integrated circuit, a photonic integrated circuit, and a pluggable optical coupling connector. The photonic integrated circuit sends or receives optical signals. The pluggable optical coupling connector is adjacent to the photonic integrated circuit and includes a pluggable interface to optically couple a fiber array to the photonic integrated circuit. Further, the electronic integrated circuit, the photonic integrated circuit, and the pluggable optical coupling connector are all embedded in a mold.

Abstract: One embodiment of the present disclosure relates to an optical fiber alignment method that enables highly accurate alignment of an optical fiber without applying a complicated driving system. The alignment method includes finely aligning the first and second optical fibers and finely aligning. Roughly aligning the first and second optical fibers based on a result of end-surface observation. Finely aligning the first and second optical fibers based on a result of side-surface observation in such a manner as to increase an optical coupling efficiency between each pair of the cores in the first and second optical fibers.

Abstract: A combinable optical-fiber adapter assembly includes combinable optical-fiber adapters. A first optical-fiber adapter of the adapters has first connection units. A second optical-fiber adapter of the adapters has second connection units. The first connection units are assembled with the second connection units. In a one-to-one manner, the first connection unit on the front portion of the outer side surface of the first adapter body is docked with the second connection unit on the front portion of the outer side surface of the second adapter body adjacent to the first adapter body, and the first connection unit on the rear portion of the outer side surface of the first adapter body is docked with the second connection unit on the rear portion of the outer side surface of the second adapter body adjacent to the first adapter body, so that two adjacent optical-fiber adapters can be assembled side-by-side.