Title :
Semiconductor optical amplifier used as an in-line detector with the signal DC-component conservation
Author :
Rampone, Thierry ; Li, Hong-Wu ; Sharaiha, Ammar
Author_Institution :
Lab. RESO, Ecole Nat. d´´Ingenieurs de Brest, France
fDate :
7/1/1998 12:00:00 AM
Abstract :
We present in this paper a dc-coupled in-line optical detector based on a multisection semiconductor optical amplifier (SOA). The key principle is to use a voltage reference correlated with the bias voltage level by the way of a two-section or a three-section SOA. So, by means of the differential detection, the signal dc-component is kept with reduced sensitivity to temperature and bias current fluctuations. Experimental and theoretical results are presented when a two-section SOA is used and performance predictions when a three-section is employed. The obtained responsivity is -63 VNV at 40 mA and over -110 VNV at 50 mA when the input optical power, measured within the fiber, is -13 dBm. When the SOA is biased at 40 mA, the detection bandwidth is over 1 GHz when the input optical power is -4 dBm
Keywords :
current fluctuations; demodulation; electro-optical modulation; optical communication equipment; photodetectors; semiconductor lasers; sensitivity; 1 GHz; 40 mA; 50 mA; bias current fluctuations; bias voltage level; dc-coupled in-line optical detector; detection bandwidth; differential detection; in-line detector; input optical power; multisection semiconductor optical amplifier; performance predictions; reduced sensitivity; responsivity; semiconductor optical amplifier; signal DC-component conservation; signal dc-component; two-section SOA; voltage reference correlation; Charge carrier density; Intersymbol interference; Optical amplifiers; Optical detectors; Optical fiber communication; Optical sensors; Semiconductor optical amplifiers; Signal detection; Stimulated emission; Voltage;
Journal_Title :
Lightwave Technology, Journal of
