Apparatus for linearization of optic modulators using a feed-for

Details Apparatus for linearization of optic modulators using a feed-for Apparatus for linearization of optic modulators using a feed-for

1992-07-17

1994-07-05

Pascal, Leslie

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359188, 359161, 332160, 455 63, 375 60, H04B 1004

Patent

active

053272790

ABSTRACT:
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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