Gain-assisted electroabsorption modulators

Details Gain-assisted electroabsorption modulators Gain-assisted electroabsorption modulators

2006-07-04

2006-07-04

Connelly-Cushwa, Michelle (Department: 2874)

Optical waveguides

Temporal optical modulation within an optical waveguide

Electro-optic

C359S247000

Reexamination Certificate

active

07072531

ABSTRACT:
A light modulator having a waveguide and a resonator is disclosed. The waveguide routes light of wavelength λ past the resonator. The resonator is coupled to the waveguide such that a portion of the light is input to the resonator, the resonator having a resonance at λ. The resonator includes a gain region in which light of wavelength λ is amplified and an absorption region in which light of wavelength λ is absorbed, the absorption region having first and second states, the first state absorbing less light of wavelength λ than the second state, the state of the absorption region is determined by an electrical signal coupled to the absorption region. The gain region provides a gain that compensates for the light absorption in the first state. In one embodiment, the waveguide and resonator are critically coupled when the absorption region is in the second state.

REFERENCES:
patent: 6633696 (2003-10-01), Vahala et al.
patent: 6871025 (2005-03-01), Maleki et al.
patent: 2003/0202555 (2003-10-01), Liu et al.
patent: 2004/0037341 (2004-02-01), Tan et al.

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