Title :
Delayed differential RIN reduction with interferometric noise suppression
Author :
Helkey, R. ; Roussell, H.
Author_Institution :
Lincoln Lab., MIT, Lexington, MA, USA
Abstract :
Summary form only given. The performance of a 4-GHz delayed differential link was measured, using a 1.55-/spl mu/m SDL distributed feedback (DFB) laser and a UTP dual-output modulator. Present polarization couplers only have isolation of -20 -30 dB between the polarization states. The large optical path length difference in combination with this residual cross talk leads to an optical filter, which causes frequency to amplitude noise conversion.
Keywords :
distributed feedback lasers; laser noise; light interferometry; optical fibre communication; optical filters; optical polarisers; semiconductor lasers; 1.55 mum; 4 GHz; GHz delayed differential link; SDL DFB laser; UTP dual-output modulator; delayed differential RIN reduction; frequency to amplitude noise conversion; interferometric noise suppression; large optical path length difference; optical filter; polarization couplers; polarization states; residual cross talk; Couplers; Delay; Distributed feedback devices; Laser feedback; Laser noise; Noise reduction; Optical filters; Optical interferometry; Optical noise; Optical polarization;
Conference_Titel :
Optical Fiber Communication Conference and Exhibit, 1998. OFC '98., Technical Digest
Conference_Location :
San Jose, CA, USA
Print_ISBN :
1-55752-521-8
DOI :
10.1109/OFC.1998.657378
