Optical switch

About: Optical switch is a research topic. Over the lifetime, 28538 publications have been published within this topic receiving 351176 citations.

High-frequency switch module

Abstract: A high-frequency switch module which comprises a high-frequency switch circuit connected among an antenna, a transmission circuit, and a reception circuit and comprising switching elements and a surface acoustic wave filter connected between the high-frequency switch circuit and the reception circuit, uses a laminate constituted of dielectric layers having electrode patterns as the multilayered board, and has a phase correction circuit disposed between the switch circuit and the surface acoustic wave filter, wherein the high-frequency switch circuit comprises a switching element, a transmission line, and a capacitor as main elements, with at least a part of the transmission line and the capacitor constituted of an electrode pattern in the laminate, and with the surface acoustic wave filter mounted on the laminate.

Electrical circuit and optical data buss

Abstract: The invention provides a printed circuit board having an optical data buss incorporated therein. Optical fibers are imbedded within the body of the printed circuit board and form an optical data circuitry within the board. Holes are formed in the printed circuit board at predetermined locations to receive a novel chip carrier. The chip carriers have a transparent area that interfaces with the optical fibers. Optical data entering the chip carrier is intercepted by an optical beam-splitter where the signals are directed to a photo transistor die for conversion to electrical signals which are then conducted to an integrated circuit die and into the printed circuitry of the printed circuit board. Electrical data signals from the printed circuit board may be conducted to the chip carrier which also contains a photo-transmitter die where the electrical data signals are converted to optical signal data and are projected to a beam-splitter for deflection into the optical fiber circuitry. When arranged in a stack, printed circuit boards are separated by physically contacting heat conductive plates which may be aluminum that act as heat sinks for cooling purposes. Holes drilled through the plates allow optical data signals to be projected from any one printed circuit board to another throughout the stack. A novel connector is provided to supply electrical power, electrical data input, and optical data input to the system. The optical circuitry is bidirectional.

Single-mode waveguide microcavity for fast optical switching.

Abstract: We investigate the properties of a tunable single-mode waveguide microcavity that is well suited for frequency modulation and switching. The cavity mode has a volume of less than one cubic half-wavelength, and the resonant frequency is tuned by refractive-index modulation. We suggest using a photorefractive effect to drive the device, based on the photoionization of deep donor levels known as DX centers in compound semiconductors. Picosecond on–off switching times are achievable when two of these cavities are placed in series. The resulting switch has the advantages of being compact and requiring as little as 10 pJ of energy of operate.

Semiconductor optical amplifiers

Abstract: # Basic Concepts # Recombination Mechanisms and Gain # Epitaxial Growth and Amplifier Designs # Low Reflectivity Facet Designs # Amplifier Rate Equations and Operating Characteristics # Photonic Integrated Circuit Using Amplifiers # Functional Properties and Applications # Optical Logic Operations # Optical Logic Circuits

Silicon-Organic Hybrid Electro-Optical Devices

Abstract: Organic materials combined with strongly guiding silicon waveguides open the route to highly efficient electro-optical devices. Modulators based on the so-called silicon-organic hybrid (SOH) platform have only recently shown frequency responses up to 100 GHz, high-speed operation beyond 112 Gbit/s with fJ/bit power consumption. In this paper, we review the SOH platform and discuss important devices such as Mach-Zehnder and IQ-modulators based on the linear electro-optic effect. We further show liquid-crystal phase-shifters with a voltage-length product as low as VπL = 0.06 V·mm and sub-μW power consumption as required for slow optical switching or tuning optical filters and devices.