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Modulation Characteristics of a Directly Modulated Super Luminescent Diode Followed by a Gain-Saturated Semiconductor Optical Amplifier
IEICE TRANSACTIONS on Electronics
Publication Date: 2000/03/25
Print ISSN: 0916-8516
Type of Manuscript: LETTER
semiconductor optical amplifier, gain saturation, super luminescent diode, direct modulation,
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A directly modulated LED or SLD (super luminescent diode) is attractive for low-cost lightwave systems such as access networks. This letter experimentally studies a directly modulated SLD followed by a gain-saturated semiconductor optical amplifier (SOA), and shows that the modulation rate is expanded in effect by the use of the gain-saturated SOA. This results from the shortened response time of the SLD due to the ASE light from the SOA and a level-equalizing effect in the gain-saturated SOA.