Programmable optical subassemblies and modules

摘要

An optical receiver, transmitter, transceiver or transponder for bursty, framed or continuous data. The optical receiver includes a burst mode clock recovery module that recovers the clock rapidly and with a small number of preamble or overhead bits at the front end of the data. A local clock is used for timing when the recovered clock is not available. Transitions between the recovered clock and local clock are smoothed out to avoid undesirable artifacts.

主权项

1. A programmable optical subassembly or module comprising:
application specific optoelectronics for receiving and transmitting optical data; control circuitry comprising a field programmable gate array (FPGA) centric programmable element in communication with the application specific optoelectronics for transmitting and receiving fiber optical data, and an electrical client side, wherein the control circuitry is configured to control and monitor the transmitting and receiving of the fiber optical data, the control circuitry being a common engine to implement one or more optical transport protocols and one or more communications applications, and wherein the control circuitry further comprises a clock and data recovery (CDR) module configured to: recover a clock from an incoming data transmission; and combine the recovered clock and a local clock into a synthesized clock that can be used to time processing of the incoming data transmission, wherein the combining of the recovered clock and the local clock includes:selecting primarily the recovered clock when the recovered clock is available; andselecting primarily the local clock when the recovered clock is not available.