Title :
Uncooled DBR laser directly Modulated at 3.125 gb/s as athermal transmitter for low-cost WDM systems
Author :
Liu, Yiran ; Davies, Andrew R. ; Ingham, Jonathan D. ; Penty, Richard V. ; White, Ian H.
Author_Institution :
Photonic Syst. Group, Cambridge Univ., UK
Abstract :
An uncooled three-section tunable distributed Bragg reflector laser is demonstrated as an athermal transmitter for low-cost uncooled wavelength-division-multiplexing (WDM) systems with tight channel spacing. A ±0.02-nm thermal wavelength drift is achieved under continuous-wave operation up to 70°C. Dynamic sidemode suppression ratio of greater than 35 dB is consistently obtained under 3.125-Gb/s direct modulation over a 20°C-70°C temperature range, with wavelength variation of as low as ±0.2 nm. This indicates that more than an order of magnitude reduction in coarse WDM channel spacing is possible using this source.
Keywords :
channel spacing; distributed Bragg reflector lasers; optical modulation; optical transmitters; semiconductor lasers; wavelength division multiplexing; 20 to 70 degC; 3.125 Gbit/s; DBR laser; athermal transmitter; channel spacing; coarse WDM; continuous-wave operation; direct modulation; dynamic sidemode suppression ratio; low-cost WDM systems; semiconductor lasers; thermal wavelength drift; three-section laser; tight channel spacing; tunable laser; uncooled laser; wavelength variation; Channel spacing; Distributed Bragg reflectors; Erbium-doped fiber lasers; Gratings; Laser tuning; Optical transmitters; Semiconductor lasers; Temperature control; Temperature distribution; Wavelength division multiplexing; Direct intensity modulation; optical fiber communications; semiconductor lasers; tunable lasers; wavelength-division-multiplexing (WDM) applications;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2005.856367
