High-resolution digital phase modulator for a fiber-optic...

Details High-resolution digital phase modulator for a fiber-optic... High-resolution digital phase modulator for a fiber-optic...

2011-06-14

2011-06-14

Mack, Ricky (Department: 2873)

Optical: systems and elements

Optical modulator

Light wave temporal modulation

C359S254000, C359S279000, C385S002000, C385S003000

Reexamination Certificate

active

07961373

ABSTRACT:
A digital phase modulator for a fiber-optic measurement device. A predetermined total number of electrodes of different lengths are arranged in parallel and on both sides of a light guidance path in or on an optical substrate. The electrodes are arranged in two or more triples along the light guidance path. In each case, two electrodes of successive length within a triple have the same length ratio with respect to one another. Such length ratio is chosen, in particular, to be ν=1.618. The electrode lengths of this triple are chosen such that the smallest step widths of the output value range of the phase modulator can be formed by subtraction between the values of at least two larger electrodes. This allows the resolution of the phase modulator to be increased from 9 bits to 11 bits without change in chip size.

REFERENCES:
patent: 5137359 (1992-08-01), Steele
patent: 5237629 (1993-08-01), Hietala et al.
patent: 6760111 (2004-07-01), Mark et al.
patent: 19629260 (1998-02-01), None
patent: 19753427 (1999-02-01), None
patent: 2185123 (1987-07-01), None
patent: 9928707 (1999-07-01), None
Article: Vawter et al., “Digital Optical Phase Control in Ridge-Waveguide Phase, Modulators,” IEEE Photonics Technology Letters, vol. 5, No. 3 (Mar. 1993), pp. 313-315.

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