V23836-C18-R363 Product Specification – October 2006

© Finisar Corporation October 2006 Rev. A Preliminary Data

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FUNCTIONAL DESCRIPTION

This transceiver is designed to transmit serial data via single mode fiber.

Figure 2

Functional Diagram

The receiver component converts the optical serial data into PECL compatible electrical

data (RD+ and RD–). The Signal Detect (SD, active high) shows whether optical data

The transmitter converts electrical PECL compatible serial data (TD+ and TD–) into

optical serial data.

The transmitter contains a laser driver circuit that drives the modulation and bias

currentof the laser diode. The currents are controlled by a power control circuit to

guarantee constant output power of the laser over temperature and aging.

The power control uses the output of the monitor PIN diode (mechanically built into the

laser coupling unit) as a controlling signal, to prevent the laser power from exceeding the

operating limits.

Single fault condition is ensured by means of an integrated automatic shutdown circuit

is only possible by turning the power off, and then on again.

Notes: