Amplitude modulation circuit having an electro-absorption modula

Details Amplitude modulation circuit having an electro-absorption modula Amplitude modulation circuit having an electro-absorption modula

1996-10-22

1998-03-03

Ben, Loha

Optical: systems and elements

Optical modulator

Light wave temporal modulation

359276, 372 26, 372 38, G02F 101

Patent

active

057241783

ABSTRACT:
The invention provides a circuit for amplitude modulating an optical signal with an N-state electrical signal where N is greater than or equal to 2, the circuit comprising a modulator having a first input for receiving the optical signal to be modulated and a second input for receiving a modulating electrical signal. According to the invention, the circuit comprises, upstream from the second input, shaping component having an input receiving the N-state electrical signal and having an output that switches from one of the N states to another of the N states in response to the N-state electrical signal taking up a level that is greater than a predetermined threshold, and switching from the other state to the one of the N states in response to the N-state electrical signal taking up a level that is less than the predetermined threshold, the predetermined threshold being associated with the pair of states, and having a level that lies between and is different from the respective levels taken by the two states.

REFERENCES:
patent: 5208817 (1993-05-01), Kao et al.
patent: 5317581 (1994-05-01), Onishi et al.
patent: 5629792 (1997-05-01), Masaki
patent: 5663823 (1997-09-01), Suzuki

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