Bias signal generation for a laser transmitter in a passive...

Details Bias signal generation for a laser transmitter in a passive... Bias signal generation for a laser transmitter in a passive...

2011-03-15

2011-03-15

Rodriguez, Armando (Department: 2828)

Coherent light generators

Particular beam control device

Optical output stabilization

C372S038080

Reexamination Certificate

active

07907649

ABSTRACT:
The teachings presented herein disclose a method and apparatus for controlling the optical power of a laser in a passive optical network transmitter that outputs a modulated optical signal responsive to a modulated input signal. In one or more embodiments, such a control method comprises detecting the voltage of the modulated input signal, and setting the DC bias level of the laser as a function of the detected voltage. These teachings may be implemented, for example, by a laser control circuit in the transceiver module of an optical network unit (“ONU”). Such an ONU may be advantageously used in a hybrid coaxial cable-optical fiber network, such as used in DPONs which interface cable system subscriber equipment to cable system head-end equipment.

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