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Noise performance of optical receivers: comparison of directional coupler and resistive feedback based front ends

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2 Author(s)
Korhonen, T. ; Div. of Telecommun., Asian Inst. of Technol., Bangkok, Thailand ; Sharma, A.B.

Noise properties of a directional-coupler-based optical receiver (DCOR) and the resistive-feedback optical receiver (RFOR) topologies are compared. For the DCOR the authors have both simulated and subsequently measured an input equivalent noise current of 3 pA/ square root (Hz) for a bandwidth of up to 2.5 GHz. By using the same noise modelling approach the simulation results for the RFOR topology gave a noise current of 10 pA/ square root (Hz) over the same bandwidth thus verifying the superiority of the DCOR over the resistive feedback optical receiver.

Published in:

Electronics Letters  (Volume:28 ,  Issue: 5 )