CPC H04B 10/1123 (2013.01) [H04B 10/118 (2013.01); H04B 10/5057 (2013.01); H04B 10/564 (2013.01); H04W 16/28 (2013.01); H04W 84/06 (2013.01)] | 15 Claims |
1. A device comprising:
an optical modulator configured to generate an optical beam, wherein the optical beam encodes network data and has a beam intensity, a beam direction and a carrier frequency;
an optical power amplifier configured to adjust a transmitted power of the optical beam;
a transmit beam angle mechanism, configured to:
adjust the beam direction; and
transmit the optical beam to a remote receiver over a free-space optical link; and
a controller, configured to:
receive backchannel data from the remote receiver comprising a received power, a bit error rate, and a carrier frequency offset between local oscillator frequencies used by the device and the remote receiver; and
modify a plurality of characteristics of the optical beam based on the backchannel data, the plurality of characteristics comprising:
adjustment of the beam intensity to maintain the bit error rate at a level that is correctable by the remote receiver while not further increasing the beam intensity; and
adjustment of the carrier frequency to reduce the carrier frequency offset,
wherein the carrier frequency offset is a difference between a local oscillator frequency of the device and a second local oscillator frequency of the remote receiver and is minimized to reduce the transmitted power of the optical beam for the bit error rate.
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