Modulation Characteristics of a Directly Modulated Super Luminescent Diode Followed by a Gain-Saturated Semiconductor Optical Amplifier


IEICE TRANSACTIONS on Electronics   Vol.E83-C   No.3   pp.520-522
Publication Date: 2000/03/25
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Optoelectronics
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.