Title :
Up to 40 Gb/s Directly Modulated Laser Operating at Low Driving Current: Buried-Heterostructure Passive Feedback Laser (BH-PFL)
Author :
Kreissl, Jochen ; Vercesi, Valeria ; Troppenz, Ute ; Gaertner, Tom ; Wenisch, Wolfgang ; Schell, Martin
Author_Institution :
Fraunhofer-Inst. fur Nachrichtentechnik, Heinrich-Hertz-Inst., Berlin, Germany
fDate :
3/1/2012 12:00:00 AM
Abstract :
A directly modulated 1.55-μm buried-heterostructure passive feedback laser exhibits a high modulation bandwidth of up to 34 GHz at moderate distributed-feedback (DFB) section currents between 20 and 60 mA. A very flat frequency response and a low alpha parameter have been demonstrated in the small signal modulation analysis. The device has open eyes at data rates of 25 and 40 Gb/s with reduced frequency chirp.
Keywords :
distributed feedback lasers; optical modulation; bandwidth 34 GHz; bit rate 25 Gbit/s to 40 Gbit/s; buried-heterostructure passive feedback laser; current 20 mA to 60 mA; directly modulated laser; distributed-feedback section currents; small signal modulation analysis; wavelength 1.55 mum; Bandwidth; Chirp; Distributed feedback devices; Laser feedback; Modulation; Optical transmitters; Waveguide lasers; Directly modulated laser (DML); InGaAsP/InP; distributed-feedback (DFB) laser; integrated optics;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2011.2179530
