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Investigation of an optoelectronic nonlinear effect in a GaInAs photodiode, and its application in a coherent optical communication system

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2 Author(s)
D. A. Humphreys ; National Physical Laboratory, Teddington, UK ; R. A. Lobbett

A nonlinear mixing effect has been predicted theoretically, and measured using a GaInAs PIN photodiode. The nonlinear effect has been simulated using a small signal finite difference model. The variation of the effect has been measured over the frequency range 1.2¿¿15 GHz for a number of bias voltages from 5 to 20 V, and the effect has been shown to be optoelectronic in origin. A high frequency heterodyne experiment has been performed with the optical and local oscillator signals in the range 10¿¿20 GHz. The difference beat frequency was observed at 500 MHz and 2 GHz. The measured conversion loss was between 27 and 40 dB for a 0 dBm local oscillator signal. The application of the optoelectronic mixing effect to optical fibre frequency domain multiplex systems for the dissemination of frequency standards has been considered.

Published in:

IEE Proceedings J - Optoelectronics  (Volume:135 ,  Issue: 1 )