Abstract
In this paper all-optical non-return to zero to pseudo-return to zero format conversion limitations, using optical notch filters, are evaluated numerically. Open source simulation toolbox Optilux was used for simulations. Gauss and short term integrator notch filter performance and full width half maximum bandwidth impact on format conversion at transmission speed up to 40 Gbit/s was compared. Then format conversion performance was evaluated in a cascade of single ring microring resonators. Results show that large depth of an optical notch filter can cause two pulses generation at the edges of input pulses and lead to clock signal degradation.DOI: http://dx.doi.org/10.5755/j01.eee.21.1.9807
Highlights
Photonic technologies for optical communications have gained great breakthrough in last years, because of high demand for bandwidth from consumers and need to reduce costs per every transmitted bit from service provider side [1]
After converter the PRZ optical signal was detected in optical receiver, which consists of photodiode (PIN), optical spectrum analyser (OSA) and electrical scope
Generated optical signals were filtered with Gauss or short term integrator notch filter with different full width half maximum (FWHM) bandwidth
Summary
Photonic technologies for optical communications have gained great breakthrough in last years, because of high demand for bandwidth from consumers and need to reduce costs per every transmitted bit from service provider side [1]. To overcome these obstacles various optical modulation formats have been created for optical transmission [2]. Format conversion with single ring and double ring microring resonators (MRR) at gigabit speeds [5]. This approach seems to be more advanced in terms of on-chip devices. Results show that increase of notch filter depth can cause two pulses generation at the edges of input NRZ pulses and lead to recovered clock signal degradations
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