http://fabiobaltieri.com/2013/05/26/usb-to-100base-fx-optical-fiber-network-card/
This project is an Open-Hardware USB to 100BASE-FX fiber optic network card, based on an ASIX AX88772B USB to Fast Ethernet controller, and comes in two variants for the fiber transciver.
This work is licensed under a Creative Commons Attribution-ShareAlike 3.0 License.
README this file
docs/ datasheets and documentation
scsc/ source directory for the 1x9 hardware variant
sfp/ source directory for the SFP hardware variant
eeprom-notes some notes and snippets on device configuration
All hardware files (schematic, layout and libraries) are in CadSoft Eagle format.