Embodiments of fiber optic communication systems are disclosed. In one
embodiment, the system includes an optical channel having a channel
response, a pulse-shaping transmitter coupled to a first end of the
optical channel, and a receiver coupled to a second end of the optical
channel. The transmitter includes a spread pulse modulator to shape
pulses of data prior to transmission and an electrical to optical
converter to transmit electrical data signals as the light signals over
the optical channel. The receiver includes an optical to electrical
converter to receive light signals from the optical channel and generate
electrical data signals and a matched filter to receive and filter the
electrical data signals with a response substantially matching a combined
response of the transmitter and the channel response to increase a signal
to noise ratio thereof.