Title :
Direct Phase Modulation DFBs for Cost-Effective ONU Transmitter in udWDM PONs
Author :
Cano, Ivan N. ; Lerin, Adolfo ; Polo, Victor ; Prat, Josep
Author_Institution :
Univ. Politec. de Catalunya, Barcelona, Spain
Abstract :
A technique for direct phase modulating a low-cost distributed feedback laser is presented for user transmitter in ultra dense wavelength division multiplexing passive optical networks. It consists of a simple RC network, which equalizes the phase response. The method is tested with differential phase-shift keying modulation and heterodyne coherent detection at 1.25 and 2.5 Gb/s showing a penalty <;1 dB at BER = 10-3 compared with external phase modulation.
Keywords :
differential phase shift keying; distributed feedback lasers; heterodyne detection; optical modulation; optical transmitters; passive optical networks; phase modulation; wavelength division multiplexing; DFB; WDM PON; cost-effective ONU transmitter; differential phase-shift keying modulation; direct phase modulation; heterodyne coherent detection; low-cost distributed feedback laser; simple RC network; ultradense wavelength division multiplexing passive optical networks; Bit error rate; Frequency modulation; Optical mixing; Optical network units; Optical transmitters; Passive optical networks; Phase modulation; PONs; Ultra dense wavelength division multiplexing; differential phase shift keying; direct modulated lasers; heterodyne detection; passive optical networks; udWDM;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2014.2309852
