Finisar

About: Finisar is a company organization based out in Sunnyvale, California, United States. It is known for research contribution in the topics: Signal & Laser. The organization has 900 authors who have published 1523 publications receiving 22634 citations.

System and method for transmitting data on return path of a cable television system

Abstract: An optical signal return path system includes a transmitter (200) having a sample clock generator (212) for generating a sample clock (213) and an RF signal receiver (202-1) for receiving and converting an analog RF data signal into a first data stream of digitized RF data samples (Data-1) at a rate determined by the sample clock. Supplemental channel circuitry (202-2) provides a second data stream (Data-2). A multiplexor (204) receives and combines the first data stream (Data-1) and second data stream (Data-2), and an optical transmitter (206) converts the combined data stream into a serialized optical data signal for transmission over an optical fiber (210). The second data stream may contain maintenance data reflecting an operational state of the transmitter.

Multi-protocol dual fiber link laser diode controller and method

Abstract: A dual optical fiber transceiver, for use with first and second optical fibers, includes a laser transmitter for transmitting laser light into the first optical fiber, a laser light receiver for receiving laser light from the second optical fiber, and a controller coupled to the laser transmitter and laser light receiver The controller includes a multi-protocol state machine for establishing the full duplex connection whenever the other device operates in compliance with either (A) a predefined "on-off-on" signaling protocol for establishing full duplex connections, or (B) a second predefined signaling protocol for establishing full duplex connections In a preferred embodiment, the predefined "on-off-on" signaling protocol is the Open Fiber Control (OFC) protocol and the second predefined signaling protocol is a standard "laser transmitter always on" protocol In the preferred embodiment, the multi-protocol state machine disables operation of the laser transmitter whenever a loss of light condition is detected by the transceiver's laser light receiver that is not in compliance with the OFC protocol

Apparatus and method for rebroadcasting signals in an optical backplane bus system

Abstract: An apparatus and method are provided for communicating optical signals between components attached to an optical backplane bus. Each component has a respective active coupler to receive and transmit optical signals through a waveguiding plate. Multiplexed polymeric holograms may be used to couple or direct optical signals between the components and the waveguiding plate. Optical signals received from any component may be rebroadcast to all other components by a distributor and its active coupler using a doubly multiplexed hologram. The distributor and its active coupler may be located proximate a midpoint of the waveguiding plate.

Beyond 100G client optics

Abstract: Major client optics applications are the high-density data center, structured data center, carrier central office, general data center, and metro inter data center, corresponding to link reaches from 100 m to 40 km. First-generation 100G multimode fiber and single-mode fiber client optics are based on 10 × 10G electrical lane and 10 × 10G or 4 × 25G optical lane architectures. Next-generation 100G MMF and SMF client optics will be based on 4 × 25G electrical lane and 4 × 25G optical lane architecture. Beyond 100G, it is likely the next standard will be 400G based on extensions of 100G technologies. Beyond 400G, 1.6T is a possible standard, requiring highly novel technologies.

Active optical cable with electrical connector

Abstract: An active cable that communicates over much of its length using one or more optical fibers, but which includes at integrated electrical connector at least one of its ends. The cable may be an electrical to optical cable, and electrical to electrical cable, or one of many other potential configurations.