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Optical data transmission apparatus and method
(United States. Patent and Trademark Office, 2004-05-25)
In a system for transmitting intensity modulated light waves (20) over an optical fiber (18), an optical data transmission apparatus (10) includes a cw laser (12) conformed to emit light at substantially a single frequency. ...
Tunable electrooptic add-drop filter apparatus and method
(United States. Patent and Trademark Office, 2004-11-02)
In filters fabricated on a birefringent electrooptic substrate (28), a tunable electrooptic add-drop filter apparatus (10) includes two input single mode waveguides (44) and a first beam splitter (24) connected to the ...