If the amplitude modulation is performed by an active element, for example by modulating the current of a laser diode, the following equation can be used to describe the output field:
However, passive amplitude modulators (like acousto-optic modulators or electro-optic modulators with polarisers) can only reduce the amplitude. In these cases, the following equation is more useful:http://www.livingreviews.org/lrr-2010-1 | ![]() This work is licensed under a Creative Commons License. Problems/comments to |