Title :
Characterization of Frequency Drift of Sampled-Grating DBR Laser Module Under Direct Modulation
Author :
Anandarajah, Prince M. ; Maher, Robert ; Barry, Liam P. ; Kaszubowska-Anandarajah, Aleksandra ; Connoly, E. ; Farrell, Tom ; McDonald, David
Author_Institution :
Dublin City Univ., Dublin
Abstract :
The authors demonstrate the drift in frequency of a static sampled-grating distributed Bragg reflector (SG DBR) laser module when it is subjected to direct modulation. The magnitude of drift and its settling time is characterized as a function of the index of modulation. Results show that when the directly modulated SG DBR is optically filtered, as in a dense wavelength-division-multiplexed system, a power penalty of 6.7 dB is incurred in comparison to the unfiltered case.
Keywords :
distributed Bragg reflector lasers; laser frequency stability; laser tuning; optical fibre communication; optical modulation; wavelength division multiplexing; DWDM; dense wavelength-division-multiplexed system; direct modulation; distributed Bragg reflector laser module; frequency drift characterization; laser stability; optical fiber communications; sampled-grating DBR laser module; tunable lasers; Distributed Bragg reflectors; Fiber lasers; Frequency; Laser stability; Optical filters; Optical modulation; Optical packet switching; Optical transmitters; Tunable circuits and devices; Wavelength division multiplexing; Dense wavelength-division multiplexing (DWDM); direct intensity modulation; laser stability; optical fiber communications; tunable lasers (TLs);
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2007.912478
