Title :
Measurement of carrier-density mediated intermodulation distortion in an optical amplifier
Author :
Jopson, R.M. ; Darcie, Thomas ; Gayliard, K.T. ; Ku, R.T. ; Tench, R.E. ; Rice, T.C. ; Olsson, N.A.
Author_Institution :
AT&T Bell Laboratories, Crawford Hill Laboratory, Holmdel, USA
Abstract :
We measured intermodulation distortion (IMD) generated by the presence of two optical tones separated by up to 1 GHz in a 1.3¿m near-travelling-wave optical amplifier. The measured distortion agrees with calculations of third-order nonlinearity caused by carrier-density modulation. The third-order intercept of 5dBm may be more restrictive in closely spaced frequency-multiplexed systems than gain saturation.
Keywords :
amplifiers; carrier density; intermodulation measurement; optical communication equipment; optical modulation; semiconductor junction lasers; 1 GHz; 1.3 micron; carrier-density modulation; closely spaced frequency-multiplexed systems; intermodulation distortion; near-travelling-wave optical amplifier; optical communication equipment; semiconductor lasers; third-order nonlinearity; two optical tones;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19870962
