phase quadrature

phase quadrature

[′fāz ‚kwäd·rə·chər]
(astronomy)
References in periodicals archive ?
The 1st BioCD demonstration was related in structure to conventional optical compact discs, but rather than operating in digital mode, it was modified to operate in interferometric phase quadrature (3), in which the signal and reference beams have a 90[degrees] relative phase difference.
The BioCD is based on the principle of optical interferometric detection in the condition of phase quadrature, in which interference intensity depends linearly, and with maximum sensitivity, on small phase differences in the signal beam.