All-Optical Format Conversion of NRZ-OOK to RZ-OOK in a Silicon Nanowire Utilizing Either XPM or FWM and Resulting in a Receiver Sensitivity Gain of $\sim$2.5 dB

Astar, W.; Driscoll, Jeffrey B.; Liu, Xiaoping; Dadap, Jerry I.; Green, W.M.J.; Vlasov, Yu. A.; Carter, G.M.; Osgood, Richard M.

doi:10.1109/jstqe.2009.2029872

Cited by 42 publications

(24 citation statements)

References 68 publications

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“…The first two are usually used in consideration such as dispersion and dispersion slope ′ , as the other higher order terms from Eq. (1) are too small to be compensated and have not been taken in the consideration [3,11,23].…”

Section: Dispersion Compensation Schemementioning

confidence: 99%

“…RZ format is more robust against the waveform distortion than the NRZ format [7]. The modulation formats are basically an on-off key (OOK) of the pulses at a certain duty cycle [22][23][24]. For the configuration 1, the simulations were done on the Optiwave system [25], whereas the configuration 2 was implemented and analysed on VPI Photonics simulation software [26].…”

Section: Introductionmentioning

confidence: 99%

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Optimisation of dispersion compensating in a long-haul fibre for RF transmission of up to 100 Gbit/s by using RZ and NRZ formats

Paloi

Mirza

Haxha

2017

Optik

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With the recent data rate increase it is very challenging to build a fibre optic network that would enable a high data rate transmission over a long haul distance. The signal suffers large degradation over a certain distance due to distortion by the nonlinear effects of the optical fibres. In particular, transmission of high data rates over existing fibre optic systems, while keeping the cost low, avoiding an increase of the system's complexity and the usage of expensive devices, would be a very challenging task. In this paper, we address this problem by increasing the transmission distance in the fibre optic links for up to 2500km. We have used Standard Single Mode Fibre (SSMF) and Dispersion Compensation Fibre (DCF), where DCF is used as a loss compensator in Radio-Over-Fibre (RoF) systems. A mixture combination of the pre, post and symmetrical fibre compensation schemes were developed to overcome the dispersion in the fibre. We have found that in order to achieve high RF over fibre optic system performance for high data rates and long transmission, there is a requirement to upgrade the optical configuration scheme in a proportional way, by raising the length of the fibre span, compensation span and amplification. We have reported optimised RF over fibre configuration schemes that would have a great impact on reducing the cost, reducing the system's complexity and avoiding usage of expensive devices, in order to achieve high data rate transmission over existing fibre optic systems.

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Section: Dispersion Compensation Schemementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Optimisation of dispersion compensating in a long-haul fibre for RF transmission of up to 100 Gbit/s by using RZ and NRZ formats

Paloi

Mirza

Haxha

2017

Optik

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show abstract

“…The modulation contrast was estimated by using a noise floor given by the power level measured when the weak signal was off. For BER measurements, the pump signal was replaced by a 10 GHz RZ signal with 12% duty cycle, which was further modulated in the OOK format at 10 Gbit/s using a pulse pattern generator with 2 7 -1 or 2 31 -1 PRBS length before injection into the device.…”

Section: All-optical Modulationmentioning

confidence: 99%

Fano resonance control in a photonic crystal structure and its application to ultrafast switching

Yu¹,

Heuck²,

Hu³

et al. 2014

Applied Physics Letters

123

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Fano resonances appear in quantum mechanical as well as classical systems as a result of the interference between two paths: one involving a discrete resonance and the other a continuum. Compared to a conventional resonance, characterized by a Lorentzian spectral response, the characteristic asymmetric and "sharp" spectral response of a Fano resonance is suggested to enable photonic switches and sensors with superior characteristics. While experimental demonstrations of the appearance of Fano resonances have been made in both plasmonic and photonic-crystal structures, the control of these resonances is experimentally challenging, often involving the coupling of near-resonant cavities. Here, we experimentally demonstrate two simple structures that allow surprisingly robust control of the Fano spectrum. One structure relies on controlling the amplitude of one of the paths and the other uses symmetry breaking. Short-pulse dynamic measurements show that besides drastically increasing the switching contrast, the transmission dynamics itself is strongly affected by the nature of the resonance. The influence of slow-recovery tails implied by a long carrier lifetime can thus be reduced using a Fano resonance due to a hitherto unrecognized reshaping effect of the nonlinear Fano transfer function. For the first time, we present a system application of a Fano structure, demonstrating its advantages by the experimental realization of 10 Gbit/s all-optical modulation with bit-error-ratios on the order of 10 -7 for input powers less than 1 mW. These results represent a significant improvement compared to the use of a conventional Lorentzian resonance.Ultra-compact photonic structures that perform optical signal processing such as modulation and switching at high-speed with low-energy consumption are essential for enabling integrated photonic chips that can meet the growing demand for information capacity . It remains, however, an important task to identify and demonstrate PhC structures that can meet the low-energy and high-bandwidth requirement. In cavity-based switches an applied control signal changes the refractive index of the cavity, thereby shifting the cavity resonance and modulating the transmission of the data signal. The shape of the transmission spectrum is then very important, since it determines the refractive

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“…All-optical format conversion of 10 Gbit/s NRZ-OOK to Return-to-Zero On-Off Keying (RZ-OOK) has been successfully achieved, utilizing either XPM or FWM, in a Silicon (Si) nanowire [55]. In both cases, the format conversion resulted in a correctly encoded and polarity-preserved RZ-OOK signal, exhibiting no error floor for BER < 10 10 .…”

Section: Mzdimentioning

confidence: 99%

Advanced optical modulation and format conversion

2014

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All-Optical Format Conversion of NRZ-OOK to RZ-OOK in a Silicon Nanowire Utilizing Either XPM or FWM and Resulting in a Receiver Sensitivity Gain of $\sim$2.5 dB

Cited by 42 publications

References 68 publications

Optimisation of dispersion compensating in a long-haul fibre for RF transmission of up to 100 Gbit/s by using RZ and NRZ formats

Optimisation of dispersion compensating in a long-haul fibre for RF transmission of up to 100 Gbit/s by using RZ and NRZ formats

Fano resonance control in a photonic crystal structure and its application to ultrafast switching

Advanced optical modulation and format conversion

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