Wavelength locking of variable dispersive elements

Details Wavelength locking of variable dispersive elements Wavelength locking of variable dispersive elements

1997-08-12

2000-06-20

Pascal, Leslie

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359130, 385 37, H04B 1018, H04J 1402

Patent

active

060784180

ABSTRACT:
A variable dispersion optical unit is used to vary the relative dispersion between an input signal and an output signal of the optical unit under control of a control circuit. The control unit uses an optical homodyne detector to beat the input optical signal with the output optical signal to generate a control signal to adjust the relative dispersion a variable dispersive element. The variable dispersive optical element may be selected from a group of dispersive elements including at least a Bragg grating, a Fabry-Perot filter, a Mach-Zehnder filter, and a waveguide routing element. The variable dispersive optical unit can be used as part of a variable wavelength selective optical circuit (e.g., a tunable wavelength filter) where the varying dispersion characteristics is used to control the selection of the wavelength of the tunable wavelength filter, or is used to select the drop/add wavelength(s) of an Add/Drop circuit.

REFERENCES:
patent: 5673129 (1997-09-01), mizrahi
patent: 5808788 (1998-09-01), Park et al.
patent: 5915052 (1999-06-01), Ball
patent: 5933270 (1999-08-01), Toyohara
patent: 5963361 (1999-10-01), Taylor et al.
patent: 5966237 (1999-10-01), Sugaya et al.

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