Apparatus for linearization of optic modulators using a...

Details Apparatus for linearization of optic modulators using a... Apparatus for linearization of optic modulators using a...

H - Electricity

04

B

H04B 1/62 (2006.01) H04B 10/145 (2006.01) H04B 10/155 (2006.01)

Patent

CA 2144960

A feed-forward predistortion circuit to provide improved linear response in optic modulators. The circuit includes a non- linear element, an amplifier/delay means and a power combiner. The non-linear element generates a first signal sin(X), where (X) is the input signal. The amplifier/delay means generates a second signal 2(X). The first and second signals are combined in the power combiner to produce a modulating signal 2(X)-sin(X) which is fed to an optic modulator. The modulating signal 2(X)-sin(X) compensates for the transfer function of the optic modulator which has a transfer function sin(X), thereby producing a linear output.

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