Title :
Noise Reduction in Multiwavelength SOA-Based Ring Laser by Coupled Dual Cavities for WDM Applications
Author :
Lee, Kwanil ; Lim, Sun Do ; Kim, Chul Han ; Lee, Ju Han ; Han, Young-Geun ; Lee, Sang Bae
Author_Institution :
Korea Inst. of Sci. & Technol. (KIST), Seoul, South Korea
fDate :
3/1/2010 12:00:00 AM
Abstract :
A novel scheme for the suppression of intra- wavelength-channel mode competition in a multiwavelength SOA-based ring laser is proposed and experimentally demonstrated. The scheme is based on coupled ring cavities, which act as mode filters to suppress the side mode frequencies. The proposed scheme performance is evaluated in terms the output power, long term stability, and side-mode suppression ratio of the proposed SOA-based ring laser. A side mode suppression ratio lager than 10 dB is readily achieved by incorporating a subcavity inside a main ring cavity, due to Vernier effect induced by the coupled dual cavities. Also is investigated the possibility of the use of the noise-reduced multiwavelength laser as a transmitter light source within wavelength division-multiplexed passive optical network.
Keywords :
interference filters; interference suppression; laser cavity resonators; laser mode locking; laser modes; laser noise; optical couplers; optical fibre networks; optical transmitters; ring lasers; semiconductor optical amplifiers; signal denoising; wavelength division multiplexing; Vernier effect; WDM applications; coupled dual cavities; coupled ring cavities; intra wavelength-channel mode; mode filters; multiwavelength SOA-based ring laser; noise reduction; passive optical network; side-mode suppression; transmitter light source; Multiwavlength fiber laser; Vernier effect; wavelength-division-multiplexed passive optical network (WDM-PON);
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2009.2037928
