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Phyworks rolls ref design for 1.25Gbit/s optical modules

Posted: 28 May 2008 ?? ?Print Version ?Bookmark and Share

Keywords:reference design? optical module? digital configuration?

Phyworks has launched a complete hardware and software reference design for 125Mbit/s to 1.25Gbit/s SFP optical modules offering a digital configuration and monitoring capability. Aiming to help datacomm module makers and network operators significantly reduce costs and time-to-market, this flexible reference design does not require specialized software engineering knowledge.

The design is based on the recently introduced PHY1040 laser transceiver and limiting amplifier IC and an off-the shelf 8bit MCU with embedded flash, running a ready-made GUI. The system architecture allows users to configure the PHY1040 in software to meet specific optics and network requirements and to create custom solutions fully compliant with the SFF8472 standard.

Using a consistent circuit layout, optical module manufacturers can use the GUI to configure the PHY1040 firmware via its two-wire interface to match the requirements of either VCSEL or FP and DFB lasers in 125Mbit/s to 1.25Gbit/s applications. Programmable device parameters include VSCSEL/laser operation, bias and modulation current, transmit power, control loop, receive path filters and loss of signal.

Module performance monitoring is also quickly set-up and customized in firmware using the GUI configuration screen. Users can configure their firmware to monitor module temperature, power supply, laser bias current, average transmitted power and average received power.

In addition, setting up the optical assembly in firmware, as opposed to the use of fixed resistors also improves laser matching accuracy and yield and reduces re-work costs. The use of a two-wire interface to configure both datacomm and FTTx modules also allows optical module manufacturers to use a single production line to produce both.

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