Title :
Direct phase modulation of a DFB laser for udWDM-PON
Author :
Cano, Ivan N. ; Lerin, Adolfo ; Polo, Victor ; Prat, Josep
Author_Institution :
Univ. Politec. de Catalunya, Barcelona, Spain
Abstract :
The response of a DFB was equalized with a simple RC network for modulating directly its phase and producing a BPSK signal. The system was tested with a heterodyne coherent detector at 1.25 Gb/s and 2.5 Gb/s showing a sensitivity penalty of around 1dB when compared with external phase modulation. The results indicate that the technique could be considered as a reliable low-cost ONU transmitter solution in udWDM-PONs.
Keywords :
RC circuits; distributed feedback lasers; heterodyne detection; optical fibre networks; optical modulation; semiconductor lasers; wavelength division multiplexing; BPSK signal; DFB laser; ONU transmitter solution; RC network; bit rate 1.25 Gbit/s; bit rate 1.25 Gbit/s to 2.5 Gbit/s; direct phase modulation; heterodyne coherent detector; sensitivity penalty; udWDM-PON; Bit error rate; Optical fibers; Optical mixing; Optical network units; Passive optical networks; Phase modulation; DFB; PON; PSK; direct phase modulation; heterodyne; udWDM;
Conference_Titel :
Transparent Optical Networks (ICTON), 2014 16th International Conference on
Conference_Location :
Graz
DOI :
10.1109/ICTON.2014.6876281
