The TRML-9100FG series multi-mode transceivers is small form factor, low power, high performance module for bi-directional serial optical data communications such as Fibre Channel FC-PH-2 for 200-M5-SN-1 and 200-M6-SN-1 and Gigabit Ethernet IEEE 802.3z 1000BASE-SX. This module is designed for multi-mode fiber and operates at a nominal wavelength of 850 nm. The transmitter section uses a multiple quantum well 850 nm VCSEL and is a class 1 laser compliant according to International Safety Standard IEC-60825. The receiver section uses an integrated GaAs detector preamplifier (IDP) mounted in an optical header and a limiting post-amplifier IC. A PECL logic interface simplifies interface to external circuitry.