Title :
Experimental verification of new EDFA gain-tilt distortion theory
Author :
Hansen, Steffen Lomholt ; Andreasen, Svend Bank ; Thorsen, Per ; Dybdal, Kristen
Author_Institution :
Res. & Dev., Jydsk Telefon, Tranbjerg, Denmark
Abstract :
Measurement of composite second-order distortion (CSO) for a 28-channel AM-TV system verifies a recent theory on erbium-doped fiber amplifier (EDFA) gain-tilt distortion. The fundamental difference between locked-inversion and continuous-wave (CW) gain-till is explained experimentally and theoretically. Good agreement between simulated and measured locked-inversion gain curves are found. The results confirm that gain-tilt distortion in optical AM-TV systems can be reduced to acceptable levels by proper EDFA design. The measurements indicate that EDFA-induced CSO cannot be used to compensate CSO generated by other mechanisms over the whole frequency band in multichannel systems.<>
Keywords :
erbium; fibre lasers; laser mode locking; laser theory; 28-channel AM-TV system; EDFA gain-tilt distortion theory; Er-doped fiber amplifier; composite second-order distortion; continuous-wave gain-tilt; locked-inversion; locked-inversion gain curves; multichannel systems; Chirp; Distortion measurement; Erbium-doped fiber amplifier; Frequency; Gain measurement; Laser noise; Optical distortion; Optical modulation; Optical pumping; Stimulated emission;
Journal_Title :
Photonics Technology Letters, IEEE
