Abstract: A controllable optical ring resonator, a photonic system and a method of controlling an optical ring resonator employ control electrodes periodically spaced apart along a closed loop optical path of an optical waveguide. The controllable optical ring resonator includes the optical waveguide and a plurality of the periodically spaced control electrodes. The photonic system includes an input optical waveguide segment and the controllable optical ring resonator adjacent and optically coupled to the segment. The method includes providing the plurality of periodically spaced control electrodes, providing an optical signal within the optical path, and addressing one or more of the control electrodes to interact with the optical signal within the optical path.

Abstract: Methods and systems for generating a supercontinuum light source, including generating electromagnetic radiation from a seed laser; coupling the seed laser electromagnetic radiation to a fiber amplifier comprising: a pump laser, a fiber coupler comprising an input and an output, and a nonlinear gain fiber comprising an input and an output, wherein the nonlinear gain fiber is configured to amplify and broaden the electromagnetic radiation from the seed laser; generating electromagnetic radiation from the pump laser; coupling the pump laser electromagnetic radiation and the seed laser electromagnetic radiation into the input of the fiber coupler; coupling the output of the fiber coupler into the input of the nonlinear gain fiber; and coupling out the amplified and broadened electromagnetic radiation from the nonlinear gain fiber. Other embodiments are described and claimed.

Abstract: An optical fiber includes a cladding, a first core, and a second core. At least one of the first core and the second core is hollow and is substantially surrounded by the cladding. At least a portion of the first core is generally parallel to and spaced from at least a portion of the second core. The optical fiber includes a defect substantially surrounded by the cladding, the defect increasing a coupling coefficient between the first core and the second core.

Abstract: The application of optical microstructures improve the quality of light available to the viewer of an optical display system, or any display which works on the concept of moving one surface into direct contact or close proximity of a light guide to extract light through frustrated total internal reflection. Certain ones of the microstructures can act to assist in overcoming stiction between the surface and the light guide.

Abstract: An integrated electro-optical fluid rotary joint has been invented in which optical signals, electrical power, and/or signal(s), as well as fluids can be simultaneously transmitted across a common rotary-stationary interface between two relatively rotatable members for such applications, as a tethered aerostats, and tethered ROV. It consists of a main stator, a main rotor rotatable relative to said main stator. An electrical rotary joint, or slip ring, a fiber optical rotary joint, and a fluid rotary joint are integrated together on the main stator and main rotor. As a result, when the main rotor rotates relative to the main stator, optical signals, electrical power, and/or signal(s), as well as fluids from the main rotor can be transmitted to the main stator, and vise versa.

Abstract: A system for making temperature and pressure measurements distributed over a distance comprises a plurality of Bragg grating measurement points disposed in an optical fiber with a predetermined spacing between adjacent Bragg grating measurement points and a substrate with the optical fiber disposed thereon, at least a portion of the optical fiber being wrapped around the substrate with at least one predetermined wrap angle, wherein the predetermined wrap angle and predetermined spacing are selected to enable a temperature measurement signal to be distinguished from a bending measurement signal, wherein the substrate has a first coefficient of thermal expansion greater than a second coefficient of thermal expansion of the optical fiber and wherein the substrate comprises a hollow tube portion and a solid rod portion, each having optical fiber disposed thereon.

Abstract: A conductive polymer and a semiconducting carbon nanotube material are combined to form a highly conductive composite. The composite can be used for EMI shielding, optical sensing, optical switching, and other uses.

Abstract: The optical multiplexer system comprises an optical multiplexer, an output path and an adjustable beam steering element. The optical multiplexer comprises an input port characterized by an original acceptance range. The output path is disposed relative to the optical multiplexer such that a light beam incident on the input port within the original acceptance range enters the output path. The adjustable beam steering element is located adjacent the input port and is adjustable such that a light beam incident on the beam steering element within an enhanced acceptance range enters the output path as an output beam. The enhanced acceptance range is at least angularly greater than the original acceptance range.

Abstract: An optical wavelength multiplexing/de-multiplexing circuit having a low loss and a flat transmission spectrum is provided. The optical wavelength multiplexing/de-multiplexing circuit compensates a temperature dependence of a center transmission wavelength which remains in an athermal AWG, and has an excellent accuracy of the center transmission wavelength in a whole operating temperature range or has a comparatively wide operable temperature range. The temperature dependence of the transmission wavelength in the athermal MZI is modulated and set so as to cancel the temperature dependence of the center wavelength which remains in the athermal AWG. The present invention focuses particularly on an optical coupler in the MZI and modulates the temperature dependence of the transmission wavelength in the MZI by providing the optical coupler itself with a mechanism which changes a phase difference between two outputs by temperature.

Abstract: In one or more embodiments, wedge light guides are constructed that are monolithic in nature and include integrally-formed optical concentrators. The wedge light guide and its associated optical concentrators are defined by a mold. In at least some embodiments, structure within the mold that defines the optical concentrators can be used as injection ports through which formation material can be injected to form the monolithic wedge light guide.

Abstract: A set of planar, two-dimensional optical devices is able to be created in a sub-micron surface layer of an SOI structure, or within a sub-micron thick combination of an SOI surface layer and an overlying polysilicon layer. Conventional masking/etching techniques may be used to form a variety of passive and optical devices in this SOI platform. Various regions of the devices may be doped to form the active device structures. Additionally, the polysilicon layer may be separately patterned to provide a region of effective mode index change for a propagating optical signal.

Abstract: An optical sight is provided and may include: a housing; at least one prism supported by the housing; an optical device disposed on the prism and including a longitudinal axis; and an illumination device associated with the optical device and operable to supply the prism with light via the optical device by supplying light to the optical device in a direction along the longitudinal axis.

Abstract: In one exemplary embodiment, an optical coupler of a fiber optic system can include a light-source input cavity packaged in an outer casing. The cavity can receive an optical signal from a light source. An optical collimator packaged in the outer casing such that a receiving end of the optical collimator can receive the light source from the light-source input cavity. The optical collimator can include at least one beam forming stage. The optical collimator can generate a collimated beam output from the optical signal. An optical cavity can receive the collimated beam output of the optical collimator. The optical cavity can be coaxially included in a receiving optical fiber coupled with the outer casing coupled with optical cavity. The optical cavity can receive the collimated beam output of the optical collimator and input the collimated beam into the receiving optical fiber.

Abstract: Optical stack is disclosed. The optical stack includes a first optical stack that includes, a first optical adhesive layer, and a reflective polarizer layer that is disposed on the first optical adhesive layer. The reflective polarizer layer substantially reflects light of a first polarization state and substantially transmits light of a second polarization state orthogonal to the first polarization state. The optical stack also includes a second optical stack that includes a second optical adhesive layer, a low index layer that is disposed on the second optical adhesive layer and includes a plurality of voids dispersed in a binder, and a light directing film that is disposed on the low index layer and includes a plurality of unitary discrete structures. Portions of each unitary discrete structure penetrate into the first optical adhesive layer. Portions of each unitary discrete structure do not penetrate into the first optical adhesive layer.

Abstract: A bi-directional fiber optical subassembly, including a laser diode, a photodiode and an optical fiber, an optical transceiver including the same, and methods of making and using the same are provided. An antireflection unit is added to a position facing the photodiode within the transceiver. The antireflection unit is configured to decrease or eliminate reflected light interference within the transceiver. The present subassembly, transceiver, and methods can reduce, minimize, or prevent interference, and the performance of the optical subassembly can also be enhanced by decreasing or eliminating reflected light interference within the transceiver.

Abstract: In one embodiment, an apparatus may include an optical fiber that may have a surface non-normal to a longitudinal axis of a distal end portion of the optical fiber. The surface may define a portion of an interface configured to redirect electromagnetic radiation propagated from within the optical fiber and incident on the interface to a direction offset from the longitudinal axis. The apparatus may also include a doped silica cap that may be fused to the optical fiber such that the surface of the optical fiber may be disposed within a cavity defined by the doped silica cap.

Abstract: Optical elements (light sources 16 or photodetectors 18) are arranged in a two-dimensional array, and the relative positional relationship between the optical elements and optical waveguides 12 is defined such that optical waveguides 12 extend between the optical elements in the two-dimensional array substantially parallel to substrate 19 for increased parallelism. Micromirrors 15 are disposed in respective optical waveguides 12 to bend light beams through 90 degrees to realize a highly efficient optical coupling between the optical elements and optical waveguides 12. The optical waveguides are stacked in multiple stages, and light beams are lead to the optical waveguides in the multiple stacks through micromirrors 15 across the stacked plane of the optical waveguides, thereby realizing parallel connection between the two-dimensional array of optical elements and a two-dimensional array of optical waveguides.

Abstract: The present invention relates to various methods of fabricating Planar Bragg Gratings (PBG) in a doped waveguide in a Planar Lightwave Circuit (PLC) device, suppressing unwanted parasitic grating effects during fabrication of the device. One approach to reduce parasitic gratings is to use a hard mask before the waveguide photolithography and etch, that results in a steeper sidewall angle that reduces or eliminates the parasitic grating effect. Another method of reducing parasitic grating effect is to deposit a layer of developable Bottom Anti Reflective Coating (BARC) prior to depositing the photo resist for waveguide etch. A third method of resisting parasitic gratings comprises using a planarizing undoped silica layer as a barrier layer on top of the core. During subsequent high temperature annealing germanium outdiffuses laterally into the cladding.

Abstract: Apparatus and method for in-line cladding-light dissipation including forming a light-scattering surface on the optical fiber such that the light-scattering surface scatters cladding light away from the optical fiber. In some embodiments, the apparatus includes an optical fiber having a core and a first cladding layer that surrounds the core, wherein a first portion of the optical fiber has a light-scattering exterior surface. Some embodiments further include a transparent enclosure, wherein the transparent enclosure includes an opening that extends from a first end of the transparent enclosure to a second end of the transparent enclosure, and wherein at least the first portion of the optical fiber is located within the opening of the transparent enclosure. Some embodiments include a light-absorbing housing that surrounds the optical fiber and the transparent enclosure and is configured to absorb the light scattered away from the optical fiber by the light-scattering exterior surface.

Abstract: A new concept of the light guide device has developed to have multi channels, the present invention comprises: a transparent body through which light can freely pass; channel condensing units disposed at predetermined intervals on the body to form a plurality of one-dimensional arrays; an optical module unit for independently sighting incident light, and re-sighting and focusing light which passes through the one-dimensional arrays formed by the channel condensing units disposed at predetermined intervals in the body; and a fiber channel module for creating independent light passages (fiber channels) which condense light from the left, right, up and down aspects of the optical module unit, at a one-to-one correspondence between the body and the optical module unit. The present device maximizes the efficiency of the solar energy utilization by reducing the guide distance of incident light.

Abstract: An apparatus for patterning objects for the manufacture of semiconductor integrated circuits includes an optical source, multiple fiber cores coupled to the optical source, each of the fiber cores has an input end and an output end, and each of the input ends is coupled to the optical source. The apparatus further includes an array coupled to each of the fiber cores, the array is configured to allow each of the fiber ends to output toward a common plane, an object having a photosensitive material coupled to the common plane, and a pattern that is exposed onto the photosensitive material. The pattern is composed of a number beams corresponding to a number of fiber cores.

Abstract: A suspension board with circuit includes a metal supporting board; an insulating base layer formed on the metal supporting board; a conductive pattern formed on the insulating base layer; an insulating cover layer formed on the insulating base layer so as to cover the conductive pattern; and an optical waveguide. The optical waveguide is provided on the metal supporting board separately from the insulating base layer, the conductive pattern, and the insulating cover layer.

Abstract: A method of detecting fluorescence/absorbance/luminescence from 24-well, 48-well, 96-well, 384-well and 1536-well microplates and other sample containers. The sample is pumped into a waveguide. The waveguide efficiently gathers and guides the emission light to the end of the waveguide. The emission light exits the ends of the waveguide and is focused into a detector. To minimize background caused by the excitation light used for fluorescence, the excitation illuminates the waveguides at 90 degrees. To facilitate reuse, the waveguide assembly can be configured to be washed by an appropriate wash solution.

Abstract: Embodiments of optical collimators are disclosed. For example, one disclosed embodiment comprises an optical waveguide having a first end, a second end opposing the first end, a viewing surface extending at least partially between the first end and the second end, and a back surface opposing the viewing surface. The viewing surface comprises a first critical angle of internal reflection, and the back surface is configured to be reflective at the first critical angle of internal reflection. Further, a collimating end reflector comprising a faceted lens structure having a plurality of facets is disposed at the second end of the optical waveguide.

Abstract: Multi-port optical connection terminal assemblies, related terminals and methods are disclosed herein. In one embodiment, a multi-port optical connection terminal assembly may include an enclosure including an internal cavity, an input orifice, and optical connection nodes. The multi-port optical connection terminal assembly may also include an optical splitter comprising a body, an input optical fiber, and output optical fibers. At least a portion of the body of the optical splitter may be disposed outside the internal cavity of the enclosure. The input optical fiber of the optical splitter may be disposed outside the internal cavity of the enclosure, and the plurality of the output optical fibers of the optical splitter may be disposed inside the internal cavity. In this manner, the enclosure of the multi-port optical connection terminal assembly is not required to be sized to completely contain the optical splitter.

Abstract: Optical path length difference should be correctly controlled for a pair of optical waveguides even in the pair of the optical waveguides which include combination of a large number of curved waveguide portions. A pair of optical waveguides include curved sections, wherein the curved section has the shape including arcuate waveguide portions which have the same curvatures, and wherein the optical waveguides have the same number of the arcuate waveguide portions.

Abstract: Optical stack is disclosed. The optical stack includes a light redirecting film that includes a first structured major surface that includes a plurality of unitary discrete structures. The optical stack also includes an optical adhesive layer that is disposed on the light directing film. At least portions of at least some unitary discrete structures in the plurality of unitary discrete structures penetrate into the optical adhesive layer. At least portions of at least some unitary discrete structures in the plurality of unitary discrete structures do not penetrate into the optical adhesive layer. The peel strength of the light redirecting film and the optical adhesive layer is greater than about 30 grams/inch. The average effective transmission of the optical stack is not less or is less than by no more than about 10% as compared to an optical stack that has the same construction except that no unitary discrete structure penetrates into the optical adhesive layer.

Abstract: A confocal optical system comprising a scanning fiber is provided. The scanning fiber is a single-mode fiber of which a first end is shaped as a curved surface. The scanning fiber transmits illumination light to the first end. The illumination light is emitted toward an observation area. The illumination light emanates from the first end. The illumination light emanates from the first end striking a target area within the observation area. The first end receives at least one of reflected light and fluorescence from the target area. The reflected light is the illumination light reflected from the target area. The fluorescence is induced at the target area by illumination from the illumination light.

Abstract: An optical selector includes: an optical waveguide which includes a first light guide section having a first refractive index, a second light guide section having a second refractive index provided to the side of and along the entire circumference of the first light guide section, and a reflector provided at opposing positions on both surfaces of each of the first and second light guide sections while exposing the outer circumferential surface of the second light guide section; a single or plurality of LDs that are placed on the outer circumference of the optical waveguide, and emit light toward the first light guide section; and a single or plurality of photodetectors that are placed on the outer circumference of the optical waveguide, and receive light emitted from the outer circumference of the optical waveguide.

Abstract: An optical assembly includes a combination of laser sources emitting radiation, focused by a combination of lenses into optical waveguides. The optical waveguide and the laser source are permanently attached to a common carrier, while at least one of the lenses is attached to a holder that is an integral part of the carrier, but is free to move initially. Micromechanical techniques are used to adjust the position of the lens and holder, and then fix the holder it into place permanently using integrated heaters with solder.

Abstract: Provided is an electro-optic device. The electro-optic device includes an input Y-branch comprising a first input branch and a second input branch, an output Y-branch comprising a first output branch and a second output branch, a first optical modulator and a second optical modulator connected in series between the first input branch and the first output branch, and a third optical modulator connecting the second input branch to the second output branch. The first optical modulator comprises a PIN diode, and each of the second optical modulator and the third optical modulator comprises a PN diode.

Abstract: An optical device which reduces coupling loss while improving practicality is provided. A multi-core fiber coupling device is an optical device which couples a multi-core fiber to single core fibers, and includes a first optical system which is located on optical axes of a plurality of beams emitted from the multi-core fiber, and which makes the optical axes of the respective beams non-parallel to each other, thereby making the beams in a state of being separated from each other, and a second optical system S2 which makes the optical axes of the plurality of beams in a state of being non-parallel to each other on the side of the first optical system, in a state of being approximately parallel to each other.

Abstract: Optical flow cell detector comprising a sample inlet and outlet in fluidic communication through a flow cell channel of cross sectional area A, an input light guide with an light exit surface arranged adjacent and in optical alignment with a light entrance surface of an output light guide, wherein the input light guide and the output light guide protrudes into the flow cell channel and wherein the distance between the light exit surface and the light entrance surface is less than 1.0 mm, and wherein the cross sectional area of the protruding portions of the input light guide and the output light guide in the flow direction is less than A/2.

Abstract: The invention relates to an optical system for coupling light from at least one approximately point-shaped light source such as a LED into a flat light guide made of a transparent material such as glass or plastic. The inventive system is characterized in that the point light source is arranged above a surface of the light guide and is associated with an optical element, which couples the light from the point light source into the flat light guide at the surface thereof, wherein the in-coupled light satisfies the condition of the critical angle for total reflection and remains inside the flat light guide until controlled out-coupling.

Abstract: An optical bus. Optical sub-assemblies are used to connect lengths of optical fiber to form a single optical fiber that is a bus. A master transceiver may be connected to one end of the fiber and nodes can be connected to the optical sub-assemblies. Each optical sub-assembly includes a center fiber with a mirror that enables each connector to reflect optical signals out of the fiber and that enables a node to launch optical signals on the optical bus. The optical bus can also be connected with a second transceiver that may be used to deliver optical power to the attached nodes. Some nodes include two optical subassemblies to enable bidirectional communication on the optical bus.

Abstract: In a method and system to fabricate a compact optical device, a periodic group-delay device (PGDD) includes N optical input ports, N being a positive integer number, each port being configured to include one or more wavelength-division-multiplexing (WDM) channels; N corresponding optical output ports, each port being configured to include one or more WDM channels. The PGDD also includes a first slab waveguide region (FSWR) coupled to the N optical input ports, a second slab waveguide region (SSWR) coupled to the said N optical output ports, a first optical grating coupled to the FSWR, a second optical grating coupled to the SSWR, and; a third slab waveguide region (TSWR) coupled to at least one of the first and second optical gratings. The TSWR is configured to provide a configurable amount of dispersion to the N optical output ports. Optical signals carried by each WDM channel are processed concurrently and independently.

Abstract: Methods and devices are provided to facilitate production of optical signals that exhibit reduced crosstalk noise and intersymbol interference. In some configurations, a multi-stage optical interleaver, including a first and a second optical interleaver, is used to process a first and a second set of input optical channels. The composite optical output of the multi-stage interleaver includes the first set of optical channels and the second set of optical channels, where each of the first and second set of input optical channels is processed once by the first optical interleaver and once by the second optical interleaver. As such, the first and second sets of input optical channels are each filtered twice using only two optical interleavers.

Abstract: Designs and manufacturing methods are provided for lighting components and systems with improved performance in luminous efficacy, total lumen output, product lifetime, and form factor through the use of optical composites with improved thermal management. Some embodiments also provide designs and manufacturing methods to minimize thermal warpage and increase the rigidity of optical films and sheets through improved balance of thermal stresses.

Abstract: An optical wave guide includes an optical waveguide layer in which a core layer is surrounded by a cladding layer, a light path converting portion provided to a light entering side and a light emitting side of the optical waveguide layer respectively, a light entering portion demarcated in an outer surface of the cladding layer, in which a light is entered to the light path converting portion of the light entering side; and a light emitting portion demarcated in an outer surface of the cladding laver, in which a light from the light path converting portion of the light emitting side is emitted, wherein an outer surface of the cladding layer except the light entering portion and the light emitting portion is formed as a roughened. surface.

Abstract: An opto-electric hybrid module capable of shortening the distance between a light-emitting section or a light-receiving section of a semiconductor chip and a reflecting surface formed in a core to reduce optical losses between an opto-electric conversion substrate section and an optical waveguide section, and a method of manufacturing the same. A recessed portion (3a) is formed in a surface of an over cladding layer (3) of the optical waveguide section (W1). At least part of the light-emitting section (7a) or the light-receiving section of the semiconductor chip (7) for opto-electric conversion and at least part of a loop portion (8a) of a bonding wire (8) in the opto-electric conversion substrate section (E1) are positioned within the recessed portion (3a). This brings the light-emitting section (7a) or the light-receiving section of the semiconductor chip (7) and the reflecting surface (2a) formed in the core (2) closer to each other.

Abstract: A mirror-embedded light transmission medium according to the present invention comprises: a light transmission medium including a light transmission layer, light being transmitted through the light transmission layer; a rough surface which terminates the light transmission layer, a direction of the rough surface being parallel or oblique to a light transmission direction of the light transmission layer; a reflection enhancing layer that adherently covers the rough surface; and a smooth surface formed over the reflection enhancing layer, the smooth surface reflecting the light transmitted through the light transmission layer.

Abstract: A method and system for coupling optical signals into silicon optoelectronic chips are disclosed and may include coupling one or more optical signals into a back surface of one or more of a plurality of CMOS photonic chips comprising photonic, electronic, and optoelectronic devices. The devices may be integrated in a front surface of the chips and optical couplers may receive the optical signals in the front surface of the chips. The optical signals may be coupled into the back surface of the chips via optical fibers and/or optical source assemblies. The optical signals may be coupled to the optical couplers via a light path etched in the chips, which may be refilled with silicon dioxide. The chips may be flip-chip bonded to a packaging substrate. Optical signals may be reflected back to the optical couplers via metal reflectors, which may be integrated in dielectric layers on the chips.

Abstract: Various embodiments of optical fiber designs and fabrication processes for ultra small core fibers (USCF) are disclosed. In some embodiments, the USCF includes a core that is at least partially surrounded by a region comprising first features. The USCF further includes a second region at least partially surrounding the first region. The second region includes second features. In an embodiment, the first features are smaller than the second features, and the second features have a filling fraction greater than about 90 percent. The first features and/or the second features may include air holes. Embodiments of the USCF may provide dispersion tailoring. Embodiments of the USCF may be used with nonlinear optical devices configured to provide, for example, a frequency comb or a supercontinuum.

Abstract: The present invention describes a microresonator that can be used as a 1:f variable coupler in a unit cell. It is described how a cascade of unit cells can be used to form a tunable, higher-order RF-filter with reconfigurable passbands. The disclosed filter structure can be utilized for the narrowband channelization of RF signals that have been modulated onto optical carriers. It is also disclosed how to utilize add/drop capabilities of the contemplated microdisks to confer connectivity and cascading in two dimensions. The present invention can conveniently provide a wavelength division multiplexing router, where an array of unit cells as provided herein can form a programmable optical switching matrix, through electronic programming of filter parameters.

Abstract: An optical fiber filter device comprises: a first fiber pigtail assembly (110) having a first optical fiber (111), a second fiber pigtail assembly (120) having a second optical fiber (121), a first optical filtering element (114) and a second optical filtering element (124). The first optical filtering element is arranged between a first port (113) of the first optical fiber and a second port (123) of the second optical fiber and is inclined at an angle to an optical axis of the first optical fiber such that a light component within a first wavelength range emitted from the first port is transmitted through the first optical filtering element and enters the second optical fiber via the second port, and a light component within a second wavelength range emitted from the first port is reflected by the first optical filtering element to form a reflected light.

Abstract: An optical probe includes an optical probe main body and a covering member. The optical probe main body includes a light-emitting portion configured to emit laser light. The covering member is configured to cover a part of the optical probe main body from the light-emitting portion such that laser light from the light-emitting portion can be emitted to an outside, and to be detachable from the optical probe main body.

Abstract: Two-dimensional coupled resonator optical waveguide arrangements and systems, devices, and methods thereof. Networks of coupled resonator optical waveguides are arranged so as to exploit topological properties of these optical networks. Such arrangement affords topological protection against disorders or perturbations in the network that may hinder or block photon flow. As a result of a disorder, photons traversing along edge states of the array are rerouted based on the disorder or perturbation. Photon routing in the network is accordingly protected against disorder or defects.

Abstract: A hollow-core optical-fiber filter is provided. The hollow-core optical-fiber filter includes a hollow-core optical fiber having a first end-face and an opposing second end-face. The first end-face and the second end-face set a fiber length. The hollow-core optical-fiber filter also includes a first reflective end-cap positioned at the first end-face and a second reflective end-cap positioned at the second end-face. When an optical beam from a laser is coupled into one of the first end-face or the second end-face, an optical output from the opposing end-face has a narrow linewidth and low frequency noise fluctuations.

Abstract: Apparatus and method are provided for transmitting at least one electro-magnetic radiation is provided. In particular, at least one optical fiber having at least one end extending along a first axis may be provided. Further, a light transmissive optical arrangement may be provided in optical cooperation with the optical fiber. The optical arrangement may have a first surface having a portion that is perpendicular to a second axis, and a second surface which includes a curved portion. The first axis can be provided at a particular angle that is more than 0° and less than 90° with respect to the second axis.

Abstract: An optical chromatic dispersion compensator (60) betters optical communication system performance. The dispersion compensator (60) includes a collimating means (61) that receives a spatially diverging beam of light from an end of an optical fiber (30). The collimating means (61) converts the spatially diverging beam into a mainly collimated beam that is emitted therefrom. An optical phaser (62) receives the mainly collimated beam from the collimating means (61) through an entrance window (63), and angularly disperses the beam in a banded pattern that is emitted from the optical phaser (61). A light-returning means (66) receives the angularly dispersed light and reflects it back through the optical phaser (62) to exit the optical phaser near the entrance window (63) thereof.