Jitter suppression techniques for laser driver circuits

Details Jitter suppression techniques for laser driver circuits Jitter suppression techniques for laser driver circuits

2006-04-25

2006-04-25

Ho, Tan (Department: 2821)

Coherent light generators

Particular component circuitry

For driving or controlling laser

C372S038070

Reexamination Certificate

active

07035303

ABSTRACT:
Driver circuits of the present invention provide current to drive laser diodes. The output current of the driver circuit includes a data signal and a low frequency tone signal. The low frequency tone signal is within the bandwidth of a power control feedback loop. The tone signal introduces low frequency noise into the output signal of the driver circuit. The low frequency noise causes jitter at the zero crossing points of the driver circuit output signal. A laser driver circuit of the present invention provides a compensation current to a laser diode. The compensation current is out of phase with the tone signal. The compensation current eliminates the low frequency noise in the output signal of the laser driver circuit.

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European Search Report for Application No. EP 03017102 mailed on Sep. 15, 2005; search completed Aug. 22, 2005. Munich.

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