Polarization-independent DPSK demodulation using a birefringent fiber loop
- 23 May 2005
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Photonics Technology Letters
- Vol. 17 (6) , 1313-1315
- https://doi.org/10.1109/lpt.2005.846566
Abstract
A robust polarization-independent technique for demodulating optical differential phase-shift-keying (DPSK) signals using a birefringent-fiber-loop (BFL) is proposed and demonstrated. The BFL has a differential group delay between its fast and slow optical axes, providing interference which allows the phase modulation to be converted to intensity modulation and then directly detected by a photodiode. Error-free bit-error-rate measurements and clear demodulated eyes were observed. The temperature stability of the scheme improves with the bit rate of the DPSK signal.Keywords
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