Patent ID: 7042573
Filing Date: 2006-05-09
Classification: G01M

Abstract:
1. An optical vector analyzer for analyzing the characteristics of a fiber-optic device under test (DUT) over a frequency range of interest, comprising: (a) a source of light for providing a varying optical frequency light over said frequency range of interest, said light having an initial polarization; (b) a spinner coupled to receive said light including: (c) a beam combiner for adding light from said reference path and from said DUT for a plurality of frequencies in said frequency range of interest and for providing an output indicative of optical power, in two orthogonal polarization states, of said combined light; (d) a spectral acquisition unit for measuring said optical power with respect to wavelength for said plurality of frequencies without the DUT coupled to receive the spinner light output, first with the switch open to obtain first measurement data and then with the switch closed to obtain second measurement data; and (e) a microprocessor responsive to said measured power and programmed to use the first and second measurement data in calibrating the optical vector analyzer.