Abstract:
Optical switches can include collimator elements that accommodate two or more optical ports. This increases the number of ports the switch can accommodate without having to increase the size of other optical components within the switch. Separate deflectors can be used to accommodate optical signals from two different groups of ports. In some embodiments cross-coupling of signals between the two groups can be accomplished through use of re-direction optics.
Abstract:
An optical assembly for double passing a transmission grating may include a prism having first, second and third surfaces. A transmission grating may be bonded to the first surface. A first mirror coating may be bonded to the second surface and a second mirror coating to the third surface. The first, second and third surfaces, the transmission grating and the first and second mirror coatings are configured such that light of a predetermined wavelength entering the prism that is incident on the transmission grating is diffracted a first time by the transmission grating towards the second surface, reflected from the second surface to the third surface, reflected from the third surface back to the transmission grating, and diffracted a second time by the transmission grating as the light exits the prism.
Abstract:
A micromirror for use in an optical apparatus may comprise a reflective portion, configured to be rotatable about a switching axis and an attenuation axis that is different from the switching axis. The reflective portion may include an edge that is substantially parallel to the attenuation axis. The edge may include one or more edge features that protrude above a plane of the micromirror surface and/or are submerged below the plane of the micromirror surface, and/or have an edge shape that deviates from a straight line. Alternatively, an array of micromirrors may have mirrors characterized by sawtooth features disposed along edges that are substantially parallel to the attenuation axis.
Abstract:
The invention relates to optical modules for use in larger electro-optic components, such as erbium doped fiber amplifiers. One aspect of the invention relates to the optical module including input and/or output fiber tube ferrules surrounded by glass mounting sleeves secured to a metal housing using a suitable adhesive. Preferably, the optical module includes one or more optical elements, such as isolators, WDM filters and beam splitters, for effecting light traveling therethrough before entering or exiting a main housing of the electro-optic component. Another aspect of the invention relates to the electro-optic component including the main housing with gaps in the outer wall thereof for receiving the optical modules. Preferably, the optical component includes an electro-optical system including lasers, erbium doped fiber, an integrated circuit board and controller hardware. The present invention provides a fully integrated system, while eliminating the vast majority of optical splicing required in conventional electro-optical components.
Abstract:
Optical performance monitoring device for monitoring and analyzing an optical signal has a periodically movable reflective mirror to receive an input optical beam and to cyclically “scan” (deflect) the beam in a one-dimensional direction. The deflected beam at a varying deflection angle is directed to a linear variable filter (LVF) that passes a selected wavelength channel of the deflected beam in dependence upon the deflection angle. The selected channel is then passed to a photodetector via a focusing lens, typically a cylindrical lens. The device is durable, tunable, offers low loss, good wavelength registrability and spectral resolution.
Abstract:
An optical attenuator has a planar MEMS substrate supporting two optical fibers; an actuator; and a silicon vane actuatable by said actuator for a movement into and out of the optical beam passed between the fibers. The vane is configured to divert at least a portion of the optical beam off the optical axis when the element is moved into the optical beam. The vane has at least one surface disposed non-perpendicularly relative to the optical axis of the beam. The vane may be of a wedged shape.
Abstract:
An integrated photonics device is described. The integrated photonics device includes a photo detector having an active area. A substrate has a side surface intersecting a top surface of the substrate at a predetermined angle. The side surface is reflective. The photo detector is bonded onto the top surface of the substrate with the active area of the photo detector facing the side surface such that light traveling parallel to the top surface of the substrate can be reflected onto the active area of the photo detector via the side surface. A method of fabricating the integrated photonics device is also described.
Abstract:
A surface-emitting laser with an integral nonlinear crystal. The laser generates light at a fundamental frequency. The nonlinear crystal converts the light into light at twice the fundamental frequency. The laser is configured in a vertical-cavity, surface-emitting structure. An adhesive layer containing indium such as indium gallium phosphide is disposed between a phosphide nonlinear crystal and an arsenide optical amplifier. The optical amplifier and the nonlinear crystal are fused together. The optical amplifier and the nonlinear crystal are located inside a laser cavity that is defined between a pair of reflectors. One of the reflectors is located adjacent the nonlinear crystal and is highly reflective of light at the fundamental frequency but transmissive of light at twice the fundamental frequency. Light is generated at the fundamental frequency, doubled in frequency as it passes back and forth through the nonlinear crystal, and emitted through the reflector adjacent the nonlinear crystal. An intracavity reflector may be included between the optical amplifier and the nonlinear crystal to prevent light at twice the fundamental frequency from propagating from the nonlinear crystal into the optical amplifier.
Abstract:
Enlightening device and method for making the same are disclosed. Individual light emitting devices such as LEDs are separated to form individual dies by process in which a first narrow trench cuts the light emitting portion of the device and a second trench cuts the substrate to which the light emitting portion is attached. The first trench can be less than 10 μm. Hence, a semiconductor area that would normally be devoted to dicing streets on the wafer is substantially reduced thereby increasing the yield of devices. The devices generated by this method can also include base members that are electrically conducting as well as heat conducting in which the base member is directly bonded to the light emitting layers thereby providing improved heat conduction.
Abstract:
Enlightening device and method for making the same are disclosed. Individual light emitting devices such as LEDs are separated to form individual dies by process in which a first narrow trench cuts the light emitting portion of the device and a second trench cuts the substrate to which the light emitting portion is attached. The first trench can be less than 10 μm. Hence, a semiconductor area that would normally be devoted to dicing streets on the wafer is substantially reduced thereby increasing the yield of devices. The devices generated by this method can also include base members that are electrically conducting as well as heat conducting in which the base member is directly bonded to the light emitting layers thereby providing improved heat conduction.