absorption modulation

absorption modulation

[əb′sȯrp·shən mäd·yü′lā·shən]
(electronics)
A system of amplitude modulation in which a variable-impedance device is inserted in or coupled to the output circuit of the transmitter. Also known as absorption control; loss modulation.
References in periodicals archive ?
A paper reports a terahertz saturable absorber with an order of magnitude higher absorption modulation than other devices.
The interference pattern of the writing beams leads to a spatially modulated optical anisotropy of the phase type [DELTA]n([chi]) (refractive index modulation) and/or the amplitude type [DELTA][alpha]([chi]) (absorption modulation) and also, in the case of azobenezene functionalized polymers, to the surface modulation [DELTA]d([chi]).