Appliance for measuring polarization mode dispersion and corresp

Details Appliance for measuring polarization mode dispersion and corresp Appliance for measuring polarization mode dispersion and corresp

1996-09-13

1998-01-27

Font, Frank G.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

356345, 356 731, G01B 902

Patent

active

057127042

ABSTRACT:
An appliance for measuring polarization mode dispersion (PMD) of a waveguide (2) comprises a source (1, 6) of wide-band polarized light, an interferometer (5) capable of receiving a light beam (21) sent by the source (1, 6), a detector (3) capable of detecting the light beam (25) from the interferometer (5), and an electronic processing unit (4) connected to the detector (3), capable of extracting a value .tau. representative of the polarization mode dispersion of the waveguide (2). The interferometer (5) divides a measuring light beam (22) sent by the source (1) into two interference light beams (23, 24). The measuring appliance comprises at least one birefringent element (17) positioned on the interferometer (5), capable of producing an algebraic difference of relative phase shifts in each of the two interference light beams (23, 24) equal to .pi..

REFERENCES:
patent: 4893931 (1990-01-01), Lefevre et al.
patent: 5206924 (1993-04-01), Kersey
patent: 5255068 (1993-10-01), Emo et al.
Journal of Lightwave Technology, vol. 9, No. 7, 1 Jul. 1991, pp. 821-827, Gisin et al, "Polarization Mode Dispersion of Short and Long Single-Mode Fibers".
Electronics Letters, vol. 17, No. 4, 19 Feb. 1981, pp. 153-154, K. Mochizuki et al, "Polarisation Mode Dispersion Measurments in Long Single Mode Fibres".
Optics Letters, vol. 19, No. 15, 1 Aug. 1994, pp. 1104-1106, B. L. Heffner, "Single-Mode Propagation of Mutual Temporal Coherence: Equivalance of Time and Frequency Measurements of Polarization-Mode Dispersion".
Patent Abstracts of Japan, vol. 010, No. 019 (P-423), 24 Jan. 1986 & JP-A-60 173429 (Nippon Denshin Denwa Kosha), 6 Sep. 1985.

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