Title :
Very low phase noise optical links: experiments and theory
Author :
Bibey, M.-B. ; Deborgies, F. ; Krakowski, M. ; Mongardien, D.
Author_Institution :
Lab. Central de Recherches, Thomson-CSF, Orsay, France
Abstract :
Additive phase noise is studied in directly modulated optical links (1.55 /spl mu/m DFB laser and PIN photodiode). Upconversion close to the microwave carrier, of the very low frequency noise of the laser, is calculated and verified experimentally. Noise sources are identified and included in the model to evaluate the microwave phase noise and then the noise to signal ratio in terms of phase fluctuations. Good agreement is obtained between calculations and measurements. Very good additive phase noise values have been obtained at 10 kHz offset: -148 dBc/Hz and -139 dBc/Hz at 3 GHz and 9 GHz respectively.
Keywords :
microwave photonics; optical fibre communication; optical fibre losses; optical modulation; optical noise; phase noise; 1.55 micrometre; 3 GHz; 9 GHz; DFB laser; PIN photodiode; additive phase noise; directly modulated optical links; microwave carrier; microwave phase noise; noise sources; noise to signal ratio; phase fluctuations; upconversion; Additive noise; Laser modes; Laser noise; Laser theory; Low-frequency noise; Masers; Optical fiber communication; Optical noise; Phase noise; Signal to noise ratio;
Conference_Titel :
Microwave Symposium Digest, 1999 IEEE MTT-S International
Conference_Location :
Anaheim, CA, USA
Print_ISBN :
0-7803-5135-5
DOI :
10.1109/MWSYM.1999.780324
