Tunable dispersion compensator

Details Tunable dispersion compensator Tunable dispersion compensator

2005-11-01

2005-11-01

Font, Frank G. (Department: 2883)

Optical waveguides

With optical coupler

Particular coupling structure

C398S147000, C385S015000, C385S027000

Reexamination Certificate

active

06961492

ABSTRACT:
A method and apparatus for implementing a colorless polarization independent Mach-Zehnder-interferometer (MZI)-based tunable dispersion compensator (TDC) that has only three MZI stages (two in a reflective MZI-TDC) and two adjustable couplers which are responsive to one control voltage, making it compact, low power, and simple to fabricate, test, and operate. Polarization independence is obtained by using a half-wave plate positioned across the midpoints of the two path lengths of middle stage MZI of the three stage MZI-TDC and by using a quarter-wave plate in front of a reflective facet of the reflective MZI-TDC. A cascaded MZI-TDC arrangement with also only a single control is formed by cascading two MZI-TDC arrangements and driving all adjustable couplers with the same control signal.

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J. Gehler, R. Wessel, F. Buchali, G. Thielecke, A. Heid, H. Blow, “Dynamic Adaption of a PLC Residual Chromatic Dispersion Compensator at 40 Gb/s” in OFC 2003, vol. 2, pp. 750-751.
Doerr C. R. et al “Potentially inexpensive 10-Gb/s tunable dispersion compensator with low polarization sensitivity” IEEE Photonics Tech. Letters, vol. 16, No. 5, May 5, 2004, pp. 1340-1342.

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