A free space wavelength duplexed system includes first and second
terminals. The first terminal includes an optical transmitter and an
optical receiver. The optical receiver has a telescope, an optical to
electrical converter and an optical amplifier coupled between the
telescope and the optical to electrical converter. A method includes the
steps of receiving a received optical signal through a telescope,
diverting the received optical signal in an optical splitter into an
optical amplifier, and transmitting a transmit optical signal through the
optical splitter to the telescope. Another method includes the steps of
receiving plural received optical signals through a telescope, diverting
the plural received optical signals in an optical splitter into an optical
amplifier, separating the plural amplified optical signals by wavelength,
and transmitting plural transmit optical signals at distinct wavelengths
through the optical splitter to the telescope.
