Abstract
Limitations imposed on the saturation energy of high-power slab-coupled optical waveguide amplifiers were studied for pulsed signal transmission. Loss due to the two-photon absorption and free-carrier absorption processes becomes a dominant factor for ultrashort-pulse amplification, leading to lower saturation energy. TPA and FCA coefficients are measured to be 65cm/GW and 7×10−17 cm2, respectively. Carrier-related gain recovery times vary from 160ps to 380ps at bias currents from 4A to 1A, respectively.
© 2009 Optical Society of America
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