You can use fiber optic Washer Attenuators as a quick and inexpensive way to prevent certain types of high-output transmitters from overdriving the receiver at the other end of the fiber link. Typical attenuation levels of these fixed attenuators, when installed at the light source, are as follows. Color 850nm (dB) 1300nm (dB)

• Red 2.5 7.4
• Blue 3.6 9.1
• Green 4.8 10.2
• Gold 5.5 11.3
• Silver 6 11.7