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We demonstrate the single and dual wavelength signals delays via Brillouin slow light in the single mode fiber at the same time. Moreover, each wavelength delay of the signal can be also controlled by the other wavelength pump power. For single wavelength, the width of 100 ns pulse can be delayed from 0 ns to 40 ns by tuning the power of the pump while for dual wavelengths pump the delay time decrease...
This paper presents a complete experimental low-cost downlink setup for the transmission of QPSK-COFDM signal over standard graded index multimode fiber. Moreover, many parameters are assessed in detail such as the effect of the fiber lengths, RMS delay spread, link gain, noise figure and AM-AM/AM-PM to investigate the link performance. This experimental work has been carried out in frequency and...
This paper presents a performance analysis of SPE-OCDMA (spectrally phase-encoded optical CDMA) over WDM networks. The discrete time Markov chain model is used to build analytical model of multi-channel random access slotted Aloha. The number of WDM wavelength is corresponded to multi-channel slotted Aloha. We measure several performance characteristics, namely, steady-state throughput and average...
A novel configuration for a Brillouin distributed fiber sensor based on Brillouin optical time-domain analysis is proposed. This configuration eliminates many intensity noise issues found in previous schemes. Resolution of 7 m all over a 47 km single-mode fiber was achieved and resolution down to 30 cm in a few kilometer fiber. Noise reduction makes possible measurements with a 16 times averaging.
This paper presents some key issues in fiber-optic interferometric magnetic field sensors. Practically applicable methods to design and implement fiber-optic Michelson interferometer and transducers are described with experimental verifications. Detection scheme of traditional hardware demodulation is improved, and a new software demodulation method is addressed. Transducers were implemented by using...
We designed and built a novel all-optical re-timing, re-amplifying, and re-shaping (3R) regeneration system based on terahertz optical asymmetric demultiplexers (TOADs) developed in our laboratory. The system is capable of parallel processing multiple wavelengths, a feature which will significantly improve the scalability of current wavelength division multiplexing (WDM) networks. Performance against...
In conventional optical data transmission schemes, electrical filters and/or optical filters are used to improve the quality of system performance. In this paper, improved design of dense wavelength division multiplexing (DWDM) optical systems is achieved by using a selective electrical filter assignment method. The methodology objective is to optimize system design and mitigate the effects of fiber...
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