Impact of a Post-OTDM-Demultiplexing Optical Filter on Dense OOK OTDM-WDM Transmission |
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| Authors: | C C Hiew H T Chuah H A Abdul-Rashid F M Abbou S P Majumder |
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| Institution: |
a Faculty of Engineering, Multimedia University, Culperjaya, Malaysia
b Alcatel Network Systems, Kuala Lumpur, Malaysia
c Balgladesh University of Engineering and Technology, Dhaka, Bangladesh |
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| Abstract: | The impact of a post-OTDM-demultiplexing optical filter on the performance of dense on-off keying (OOK) optical time division multiplexing (OTDM)—wavelength division multiplexing (WDM) systems was studied. For return-to-zero (RZ) modulation, it was found that the additional filter working in a double-tier filter configuration did not offer any significant improvements to performance when the signal pulse width is optimized. Improvements generally increase only when the signal pulse width deviates from its optimal value and only for low spectral densities. For ideal non-return-to-zero (NRZ) modulation, however, significant improvements of around 1 dB are obtained using the double-tier configuration over a large range of spectral densities. |
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| Keywords: | optical communications wavelength division multiplexing time division multiplexing optical filters modulation |
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