Enhancement of Modulation Speed of RSOA by Using Instantaneous Injection/Depletion Current

Akira AGATA
Takayuki SANO
Kosuke NISHIMURA

Publication
IEICE TRANSACTIONS on Electronics   Vol.E95-C    No.7    pp.1252-1257
Publication Date: 2012/07/01
Online ISSN: 1745-1353
DOI: 10.1587/transele.E95.C.1252
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Section on Recent Progress in Active Photonic Device Technologies)
Category: 
Keyword: 
RSOA,  PSK,  coherent detection,  digital signal processing (DSP),  WDM PON,  

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Summary: 
We propose and demonstrate a simple and novel technique to accelerate the carrier injection/depletion processes in an RSOA by applying instantaneous injection/depletion currents at the transition edges of the modulation signal to force the carrier density to respond at a high speed and, as a result, to increase its modulation speed. We theoretically and experimentally show that, by using the proposed technique, it is possible to obtain 5 Gbit/s optical BPSK signal from an RSOA having a modulation bandwidth of only 0.9 GHz.