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Analysis of operation of fast peak detectors in burst-mode fibre optic receivers

Śliwczyński Ł.

Poznan University of Technology Academic Journals. Electrical Engineering

2007

No 54

181-188

In the paper, the analysis of operation of fast peak detectors is presented. It is assumed that the signal driving the detector is composed of short pulses with amplitude in the order of a few mV. Such detectors are used in the fibre optic burst-mode networks, where digital data is conveyed in the form of packets, which differ in amplitude substantially. Peak detectors are used there to determine proper threshold voltage that is necessary to perform data detection in each packet. The paper is focused mostly on the effects occurring in the peak detectors with transconductance amplifier in the feedback loop, resulting from amplifier bandwidth limitation and presence of stray capacitances.

Novel burst mode laser driver with just-at-threshold bias

Śliwczyński Ł., Krehlik P.

Opto-Electronics Review

2004

Vol. 12, No. 3

333-337

In the paper, the novel idea of burst mode laser driver with high extinction ratio is presented. The concept is based on controlling the bias current very close to the laser threshold, what is obtained by stabilising the laser power between the data bursts in the range of a few µW. The at-threshold bias eliminates the laser turn on delay, making the driver suitable to transmit the bursts of data without any prebiasing procedure. The experimental driver design is described and measurement results are reported.