Patent ID: 8401045

Claim:
A method comprising: at a transmitter, biasing a vertical-cavity surface-emitting laser (VCSEL) coupled to an optical medium, the biasing of the VCSEL determining at least in part an optical power output by the VCSEL to the optical medium; at the transmitter, modulating the VCSEL with data to transmit the data optically through the optical medium to a receiver operable to recover the modulated data; at the transmitter, receiving from the receiver through a feedback channel: an error vector representing a degradation in performance of the VCSEL; or an instruction vector comprising one or more coefficients for use in biasing the VCSEL, the coefficients having been derived from the error vector; and at the transmitter, adjusting the biasing of the VCSEL based on the error vector or the instruction vector to regulate the optical power output by the VCSEL to the optical medium.