Abstract: Determining properties of an optical device under test (ODUT), includes: splitting an incoming light beam into first and second light beams, coupling the first light beam into the ODUT, letting the second light beam travel a different path as the first light beam, splitting the second light beam into first and second parts, delaying the second part of the second light beam relative to the first part of the second light beam, recombining the first and the second parts of the second light beam, superimposing the first light beam and the recombined second light beam to produce interferences between the first light beam and the recombined second light beam in at least one resulting superimposed light beam as a function of frequency and polarization when tuning the frequency of the incoming light beam over a given range, deriving the optical property of the ODUT from the frequency dependence of the detected powers.

Abstract: An apparatus and a method of determination of at least one optical parameter of an optical signal includes providing a beam of the optical signal having a diameter, manipulating the beam, the manipulation having polarization properties, the properties being dependent of the position in the beam laterally with respect to a direction of propagation of the beam during manipulation, detecting in intensities at least three parts of the beam in their dependence of the position in the beam laterally with respect to a direction of propagation of the beam during detection.

Abstract: A method and an apparatus for determination of properties, e.g. of elements of the Jones matrix of an optical device under test, comprising the steps of: producing an incoming light beam, splitting the light beam into a first light beam and a second light beam, coupling the first light beam, preferably having two parts delayed with respect to each other, with a given initial polarization into the optical device under test, letting the second light beam travel a different path than the first light beam, superimposing the first light beam and the second light beam to produce interference between the first light beam and the second light beam in a resulting superimposed light beam, splitting the superimposed light beam into a third light beam polarization dependent and a fourth light beam, detecting the power of the third and the fourth light beam as a function of frequency when tuning the frequency of the incoming light beam over a given frequency range, deriving optical properties, e.g.

Abstract: The present invention relates a method of influencing a group delay of an optical signal, comprising the steps of a: splitting a beam of the optical signal into n parts, each part traveling an optical path, n being a natural number greater zero, b: splitting all of the n parts into m subparts, each part traveling an optical path, m being a natural number greater zero, c: superimposing the kth subpart of at least two of the m subparts to a resulting kth superimposed part, k=1, d: repeating step c for k from 2 to m, e: performing steps b to d at least one time with at least two of the superimposed parts, f: using at least one of the resulting superimposed parts for influencing the group delay of the optical signal.

Abstract: A method and an apparatus for delaying parts of a coherent optical signal beam relative to each other, comprising: a first device for splitting the beam into a first part and a second part, a second device for delaying the second part relative to the first part, a third device for recombining the first and the second part, a fourth device for providing the recombined parts with different polarizations.

Abstract: The invention relates to an apparatus and a method of determination of at least one optical parameter of an optical signal, comprising the steps of: providing a beam of the optical signal having a diameter, manipulating the beam, the manipulation having polarization properties, the properties being dependent of the position in the beam laterally with respect to a direction of propagation of the beam during manipulation, detecting in intensities at least three parts of the beam in their dependence of the position in the beam laterally with respect to a direction of propagation of the beam during detection.

Abstract: A method and an apparatus for determination of properties, e.g. of elements of the Jones matrix of an optical device under test, comprising the steps of: producing an incoming light beam, splitting the light beam into a first light beam and a second light beam, coupling the first light beam, preferably having two parts delayed with respect to each other, with a given initial polarization into the optical device under test, letting the second light beam travel a different path than the first light beam, superimposing the first light beam and the second light beam to produce interference between the first light beam and the second light beam in a resulting superimposed light beam, splitting the superimposed light beam into a third light beam polarization dependent and a fourth light beam, detecting the power of the third and the fourth light beam as a function of frequency when tuning the frequency of the incoming light beam over a given frequency range, deriving optical properties, e.g.