Optical: systems and elements – Optical modulator – Having particular chemical composition or structure
Patent
1998-11-16
2000-07-11
Epps, Georgia
Optical: systems and elements
Optical modulator
Having particular chemical composition or structure
359320, 359245, 359252, 385 33, 385 36, G02F 100, G02B 632
Patent
active
060881518
ABSTRACT:
An optical modulator controllably attenuates an optical signal by changing the index of refraction of an electro-optic prism in the modulator by varying the electrical bias applied to the electro-optic prism. Changing the index of refraction alters the path along which the optical signal travels through the optical modulator. By appropriately focusing the optical signal, the location of the optical signal relative to an output fiber can be controlled to vary the degree of optical coupling between the optical signal and the output fiber, thereby changing the amplitude of the outgoing optical signal. In one embodiment, the optical modulator has an electro-optic prism located between a lens and a mirror, where the mirror reflects the optical signal to pass through the prism and the lens two times: once along an input path and once along an output path. In another embodiment, the optical modulator has an electro-optic prism located between two lenses and the optical signal passes through the prism and each lens a single time, where one lens focuses the optical signal before passing through the prism and the other lens focuses the optical signal after passing through the prism.
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Epps Georgia
Lester Evelyn A.
Lucent Technologies - Inc.
Mendelsohn Steve
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