The Oclaro LambdaFLEXTM Tunable XFP module is a high performance tunable pluggable transceiver for use in the C-band window covering 1528nm to 1566nm. The module supports data rates from 9.95Gb/s to 11.35Gb/s and is provided in an XFP, MSA compliant package. The optical transmitter utilizes the Oclaro LambdaFLEX™ Tunable ILMZ chip to provide a high performance, low cost 10Gb/s transceiver. Channel tuning is supported on the ITU-T 50GHz grid across full C-band with ±2.5GHz stability. Wavelength and frequency tuning modes are supported in accordance with SFF-8477. The receive path comprises an APD receiver with linear amplifier and CDR. For optimum system performance in noise loaded applications, support is provided for external control of the receiver decision threshold. An external 2- wire serial interface is provided to support extensive control, monitor and diagnostic functions in accordance with INF 8077i. L- band transmitters and high temperature operation options will be available in the future.