Abstract: A monitoring and troubleshooting system to determine whether or not an antenna that is used for receiving wireless weak signals, like base station for cellular wireless communication, is operational. The antenna status condition is signaled over the Fiber Optic (FO) link without interfering the signal during normal operation. When a fault is detected the status at the FO receiver is determined. Then, an indication using special signaling allows a service technician to distinguish if the status fault is antenna failure or antenna disconnect. The present invention will also allow a service technician to determine if there is a FO link failure by use of light intensity monitoring. The present invention also includes a method of monitoring the status of a radio frequency antenna with the apparatus as discussed above.

Abstract: A monitoring and troubleshooting system to determine whether or not an antenna that is used for receiving wireless weak signals, like base station for cellular wireless communication, is operational. The antenna status condition is signaled over the Fiber Optic (FO) link without interfering the signal during normal operation. When a fault is detected the status at the FO receiver is determined. Then, an indication using special signaling allows a service technician to distinguish if the status fault is antenna failure or antenna disconnect. The present invention will also allow a service technician to determine if there is a FO link failure by use of light intensity monitoring.

Abstract: The present invention is an apparatus and method that identifies and localizes fiber breaks or faults automatically, utilizing a fiber optic data transceiver that has ?OTDR functionality. The transceiver of the present invention is a single wavelength bi-directional transceiver that during normal operation sends and receives optical data streams in the same wavelength window using any protocol and reports the distance to the fault or multiple faults nearly instantaneously when the transfer of data is disrupted, without the need to have fiber lines dedicated for this purpose or physically connect and reconnect each fiber line to check for faults and eliminates the need to map out the distance to the remote transceiver.

Abstract: A passive optical network which is capable of full duplex digital transmission at high data rates and which also provides analog broadcast transmission is disclosed. A central station provides analog broadcast transmission at a first wavelength of light and full duplex digital transmission using second and third wavelengths of light. Optical networking units, electrically or wirelessly coupled to end users in the network, are optically coupled to the central station via passive optical network nodes. The optical networking units resolve the two broadcast streams from the central station employing compact optics configured on a transparent substrate and provide burst mode digital transmission up stream to the central station on a time division multiple access basis.

Abstract: A hybrid optical and electrical module is disclosed. The hybrid optical and electrical module includes an optical fiber and an active optical component module configured in a fixed relation to the fiber. The active optical component module includes a substrate, an active optical component mounted on the substrate in a configuration to optically couple to the fiber, and an electrical circuit on the substrate electrically coupled to the active optical component. The electrical circuit includes at least one integrated circuit. The active optical component module includes external electrical leads extending through the substrate to connect with external circuitry.

Abstract: A passive optical network which is capable of full duplex digital transmission at high data rates and which also provides analog broadcast transmission is disclosed. A central station provides analog broadcast transmission at a first wavelength of light and full duplex digital transmission using second and third wavelengths of light. Optical networking units, electrically or wirelessly coupled to end users in the network, are optically coupled to the central station via passive optical network nodes. The optical networking units resolve the two broadcast streams from the central station employing compact optics configured on a transparent substrate and provide burst mode digital transmission up stream to the central station on a time division multiple access basis.

Abstract: A fiber optic transmitter and/or transceiver adapted for use in an optical fiber data transmission system which is capable of transmitting data at high data rates in burst mode is disclosed. An analog dual loop automatic power control circuit samples monitored laser power peak and valley levels and uses them for modulation and bias laser driver control. These levels compensate for variations in laser power due to temperature variations or other factors. The sampled peak and valley levels are held between bursts in an analog level memory and are reestablished on a burst by burst basis. The optical transmitter or transceiver is further capable of operating in both burst and continuous modes.

Abstract: A fiber optic transceiver operable in a continuous or burst mode is disclosed. The transceiver operating in a receive mode receives modulated light signals and converts the signals to modulated electrical signals. The modulated electrical signals are provided with a front end level control on a bit by bit basis to adjust the signals to a substantially constant reference level. The receiver front end detects also differentiates the signal to provide a signal corresponding to transitions in the incoming modulated electrical signal. The differentiated signal with stable reference level is provided to a quantizer. The quantizer employs the differentiated signal to extract a digital signal which may be accurately used for data and clock signal extraction.