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Optical Square-Wave Clock Generation Based on an All-Optical Flip-Flop

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3 Author(s)
Kaplan, A.M. ; Univ. of Rochester, Rochester, NY, USA ; Agrawal, G.P. ; Maywar, D.N.

We demonstrate optical square-wave clock generation based on an all-optical flip-flop. The bistable output power from a resonant-type semiconductor optical amplifier (SOA) is switched on and off by modulating its input with its output via cross-gain modulation in a traveling-wave SOA. All active components are driven by dc currents, and the wavelength and clock frequency are selectable. A clock frequency of 3.5 MHz is demonstrated, limited by the time of flight between bulk optical components. Optical square-wave clock signals are promising for applications in photonic integrated circuits and all-optical signal processing.

Published in:

Photonics Technology Letters, IEEE  (Volume:22 ,  Issue: 7 )

Date of Publication:

April1, 2010

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