Patent ID: 8768166

Claim:
A method comprising: receiving optical signals at a first optical transceiver device that are transmitted from a second optical transceiver device; determining a receive power of the optical signals received at the first optical transceiver device from the second optical transceiver device; and adjusting a duty cycle of pulse width modulated optical signals transmitted by the first optical transceiver device to the second optical transceiver device to one of three values, to indicate to the second optical transceiver device a disparity of the receive power with respect to a target receive power level at the first optical transceiver device, wherein adjusting comprises setting the duty cycle of the optical signals transmitted by the first optical transceiver device to a first value of approximately 90% when the receive power is within the predetermined range associated with the target receive power level, a second value of approximately 85% when the receive power is below the predetermined range associated with the target receive power level, and a third value of approximately 95% when the receive power is above the predetermined range associated with the target receive power level.