The SPS-9140FWG series single mode transceivers is small form factor pluggable module for bi-directional serial optical data communications such as Gigabit Ethernet and Fiber Channel 1x/2x SM-LC-L FC-PI. It is with the SFP 20-pin connector to allow hot plug capability. Digital diagnostic functions are available via an I2C. This module is designed for single mode fiber and operates at a nominal wavelength of 1310 nm. A guaranteed minimum optical link budget of 22 dB is offered which can correspond to a link distance of over 40 km (assuming worst case fiber loss of 0.4 dB/km). The transmitter section uses a multiple quantum well 1310 nm DFB laser and is a class 1 laser compliant according to International Safety Standard IEC-60825. The receiver section uses an integrated InGaAs detector preamplifier (IDP) mounted in an optical header and a limiting post-amplifier IC.