Nonlinear fibre-optic receiver for ultrashort pulse code division multiple access communications

Sardesai, H.P.; Weiner, Andrew M.

doi:10.1049/el:19970416

Cited by 45 publications

(9 citation statements)

References 4 publications

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“…Consequently, it is highly desirable to employ an all‐optical thresholder to suppress the noise ratio and accordingly improve the SNR. Persistent efforts have been made to achieve high‐performance optical thresholder by taking advantage of diverse nonlinear optics properties existing in optical materials, including nonlinear effects in various special types of optical fibers, second harmonic generation (SHG) effect in periodically poled lithium niobate (PPLN), cross gain modulation (XGM) effect in distributed‐feedback (DFB) semiconductor laser, and so on. In spite of those achievements, however, the limitations coming from the current materials still trigger strong motivations to search for new advanced optical materials with desired properties, especially for all‐optical noise suppression and optical pulse reshaping.…”

Section: Introductionmentioning

confidence: 61%

Few‐Layer Phosphorene‐Decorated Microfiber for All‐Optical Thresholding and Optical Modulation

Zheng

Tang

Yang

et al. 2017

Advanced Optical Materials

127

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Phosphorene, mono/few‐layered black phosphorous with advantages of tunable energy bandgaps and strong light–matter interaction, is fabricated by electrochemical intercalation with large area (≈3 µm) and controllable thickness (mainly four layers). Thanks to the direct gap and resonant absorption of four‐layer phosphorene at the telecommunication band, all‐optical thresholding and optical modulation are demonstrated for optical communications by using few‐layer phosphorene‐decorated microfibers. This device is experimentally verified as an efficient noise suppressor that can enhance the signal‐to‐noise ratio and reshape the deteriorated signal pulse, and also as an optical modulator that can switch the signal on/off by pumping light. The findings, as the first prototypic device of all‐optical thresholding and optical modulation, might facilitate the development of phosphorene‐based optical communication technologies.

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Section: Introductionmentioning

confidence: 61%

Few‐Layer Phosphorene‐Decorated Microfiber for All‐Optical Thresholding and Optical Modulation

Zheng

Tang

Yang

et al. 2017

Advanced Optical Materials

127

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“…The performance of OCDMA systems is degraded by MAI and beat noises [19]- [21]. Here, the MAI and beat noises refer to the incoherent and coherent part of the noises, respectively, as discussed in [21].…”

Section: Ocdma-pon Systemmentioning

confidence: 99%

Ten-user truly asynchronous gigabit OCDMA transmission experiment with a 511-chip SSFBG en/decoder

Hamanaka

Wang

Wada³

et al. 2006

J. Lightwave Technol.

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A ten-user truly asynchronous gigabit coherentoptical-code-division-multiple-access (OCDMA) transmission was experimentally demonstrated without using any timing coordination. The enabling technologies are a record-length 511-chip superstructured-fiber-Bragg-grating (SSFBG) en/decoder and a supercontinuum (SC)-based optical-thresholding technique to significantly suppress the signal interference beat noise as well as the multiple-access-interference (MAI) noise.

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“…Nonlinear optical loop mirror (NOLM) was reported to be able to suppress the pedestal of the decoded pulse with low operation power [28], however, it might be not suitable for optical thresholding since the power transfer function of NOLM does not have a steep thrteshold characteristic. While, using self-phase-modulation (SPM) induced signal spectral broadening followed by long-pass-filter [19,27,29] could have better thresholding performance, however, still operate at relatively high power so far. Using super-continuum (SC) generation in normal DFF can be also used for optical thresholding with features the polarization-independency, rather low insertion loss, steep transfer function as well as the pulse reshaping capability [30].…”

Section: B Detection Techniquesmentioning

confidence: 99%

Enabling techniques for asynchronous coherent OCDMA

2005

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The coherent OCDMA system could suffer from severe multiple access interference (MAI) and beat noise, which limit the maximum number of active users that can be supported in a network. One effective method to reduce the beat noise as well as the MAI noise is to lower the interference level by adopting ultra-long optical code. Applying optical thresholding technique is also crucial to enable data-rate detection for achieving a practical OCDMA system. In this paper, we review the recent progress in the key enabling techniques for asynchronous coherent OCDMA: the novel encoder/decoders including spatial lightwave phase modulator, micro-ring resonator for spectral phase coding and superstructured FBG (SSFBG) and AWG type encode/decoder for time-spreading coding; optical thresholding techniques with PPLN and nonlinearity in fiber. The FEC has also been applied in OCDMA system recently.With 511-chip SSFBG and SC-based optical thresholder, 10-user, truly-asynchronous gigabit OCDMA transmission has been successfully achieved. Most recently, a record throughput 12×10.71 Gbps truly-asynchronous OCDMA has been demonstrated by using the 16×16 ports AWG-type encoder/decoder and FEC transmit ITU-T G.709 OTN frames.

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Nonlinear fibre-optic receiver for ultrashort pulse code division multiple access communications

Cited by 45 publications

References 4 publications

Few‐Layer Phosphorene‐Decorated Microfiber for All‐Optical Thresholding and Optical Modulation

Few‐Layer Phosphorene‐Decorated Microfiber for All‐Optical Thresholding and Optical Modulation

Ten-user truly asynchronous gigabit OCDMA transmission experiment with a 511-chip SSFBG en/decoder

Enabling techniques for asynchronous coherent OCDMA

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