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Integrated optical differential amplifier with large dynamic range for gigahertz bandwidth electrical signals

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2 Author(s)
Berry, M.H. ; US Naval Ocean Syst. Center, San Diego, CA, USA ; Gookin, D.M.

An optoelectronic differential amplifier for gigahertz-bandwidth electrical signals using fiber optics and integrated optical devices is presented. In the amplifier presented the signal subtraction is done while still in the optical domain. The differential gain is a function of the electrical-to-optical and optical-to-electrical conversion factors. The common-mode rejection ratio of the differential amplifier at 1 GHz is greater than 30 dB. The common-mode rejection ratio depends on the time difference between the differential amplifier inputs. This device could be used as an integrated module in radar and communications systems.<>

Published in:

Photonics Technology Letters, IEEE  (Volume:3 ,  Issue: 3 )