Polarization state frequency multiplexing

Details Polarization state frequency multiplexing Polarization state frequency multiplexing

2007-08-07

2007-08-07

Lee, Hwa (Andrew) (Department: 2886)

Optics: measuring and testing

By light interference

Using fiber or waveguide interferometer

C356S073100

Reexamination Certificate

active

10600925

ABSTRACT:
A method for the rapid measurement of polarization dependent properties of an optical device under test uses a novel technique to generate light in four different polarization states in which each state is individually sensed at a different interference frequency.The device for executing this method includes a Mach-Zehnder interferometer (M-Z) having a reference arm and a signal arm. In the signal arm, a device called a “polarization state frequency multiplexer” (PSFM) splits the light into four ports, transforms each part into one of four predetermined polarization states and then combines the light in the different polarization states together. The combined light is then passed through the device under test and combined/interfered with the light propagating through the reference arm at the output of the M-Z interferometer. Since the optical frequency of the input light to the M-Z interferometer is scanned through a range of wavelengths at a fixed repetition rate, the output light intensity (reference pattern) from the interferometer is modulated. By analyzing the M-Z interferometer output in the frequency domain, the signal levels of each polarization state can be identified and measured.

REFERENCES:
patent: 6043887 (2000-03-01), Allard et al.
patent: 6606158 (2003-08-01), Rosenfeldt et al.
patent: 1 113 250 (2001-07-01), None
patent: 1 191 320 (2002-03-01), None
patent: 1 207 377 (2002-05-01), None
Gregory D. VanWiggerren et al., “Single-Scan Polarization-Resolved Heterodyne Optical Network Analyzer”, Technical Digest, OFC 2002, Optical Fiber Communication Conference and Exhibit, Mar. 17-22, 2002, pp. 253-254.
P.A. Williams, “Modulation Phase-Shift Measurement of PMD Using Only Four Launched Polarisation States: A New Algorithm”, Electronics Letters, Sep. 2, 1999, vol. 35, No. 18.

Affiliated with

Also associated with

Rating

Polarization state frequency multiplexing does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Polarization state frequency multiplexing, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Polarization state frequency multiplexing will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3838359