Ultrahigh-Speed OTDM-Transmission Technology

Weber, H.G.; Ludwig, R.; Ferber, S.; Schmidt‐Langhorst, Carsten; Kroh, M.; Marembert, V.; Boerner, C.; Schubert, C.

doi:10.1109/jlt.2006.885784

Cited by 115 publications

(53 citation statements)

References 64 publications

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“…Pulses produced by compression of the original beat note are obtained. Several groups have been investigating this technique with a primary interest on generation of short, high-repetition rate pulses for optical time division multiplexing (OTDM) for optical telecommunications [ 24 ]. FWMcombs have been demonstrated using optical fibers with anomalous [ 25 ] and normal dispersion [26].…”

Section: Accuracy and Stability Of Four-wave Mixing Fiber Combsmentioning

confidence: 99%

Optical frequency combs generated by four-wave mixing in optical fibers for astrophysical spectrometer calibration and metrology

Cruz¹

2008

Opt. Express

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Optical frequency combs generated by multiple four-wave mixing of two stabilized single-frequency lasers in optical fibers are proposed for use as high precision frequency markers, calibration of astrophysical spectrometers and metrology. Use of highly nonlinear and photonic crystal fibers with very short lengths and small group velocity dispersion, combined with energy and momentum conservation required by the parametric generation, assures negligible phase mismatch between comb frequencies. In contrast to combs from mode-locked lasers or microcavities, the absence of a resonator allows large tuning of the frequency spacing from tens of gigahertz to beyond teraHertz.

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Section: Accuracy and Stability Of Four-wave Mixing Fiber Combsmentioning

confidence: 99%

Optical frequency combs generated by four-wave mixing in optical fibers for astrophysical spectrometer calibration and metrology

Cruz¹

2008

Opt. Express

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“…More recently, quantum key distribution and quantum teleportation have been achieved over distances of several to tens of kilometers by using metropolitan SMF networks [7][8][9] , which further confirms the capability of SMF network as quantum channel. In the past decades, multiplexing technologies in different degrees of freedom, such as time, wavelength, polarization, and phase, have been exploited to increase the information carrying capacity of SMF [10][11][12][13] . However, due to the fast growing internet traffic, the current fiber communication network based on SMFs is reaching its capacity limit 14 .…”

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confidence: 99%

Distribution of Entangled Photon Pairs over Few Mode Fibers

Cui

2016

Asia Communications and Photonics Conference 2016

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Few-mode fibers (FMFs) have been recently employed in classical optical communication to increase the data transmission capacity. Here we explore the capability of employing FMF for long distance quantum communication. We experimentally distribute photon pairs in the forms of time-bin and polarization entanglement over a 1-km-long FMF. We find the time-bin entangled photon pairs maintain their high degree of entanglement, no matter what type of spatial modes they are distributed in. For the polarization entangled photon pairs, however, the degree of entanglement is maintained when photon pairs are distributed in LP 01 mode but significantly declines when photon pairs are distributed in LP 11 mode due to a mode coupling effect in LP 11 mode group. We propose and test a remedy to recover the high degree of entanglement. Our study shows, when FMFs are employed as quantum channels, selection of spatial channels and degrees of freedom of entanglement should be carefully considered.Quantum communication has experienced rapid progress in recent years, and is developing towards a practical and mature technology 1 . Transferring high volume of quantum information between distanced places is a paramount task of quantum communication. An effective solution for the task is to encode quantum information on single photons or entangled photons, and distribute the photons over quantum channels of low losses such as optical fiber links. Previously, several examples of entangled photon pair distribution over single-mode fiber (SMF) with distances up to 200 kilometers were successfully demonstrated 2-6 . More recently, quantum key distribution and quantum teleportation have been achieved over distances of several to tens of kilometers by using metropolitan SMF networks [7][8][9] , which further confirms the capability of SMF network as quantum channel. In the past decades, multiplexing technologies in different degrees of freedom, such as time, wavelength, polarization, and phase, have been exploited to increase the information carrying capacity of SMF [10][11][12][13] . However, due to the fast growing internet traffic, the current fiber communication network based on SMFs is reaching its capacity limit 14 . Recent studies have shown that the space-division multiplexing (SDM) based on few-mode fibers (FMFs) is a promising solution to break through such a limit 15,16 . The core diameter of an FMF is slightly larger than that of an SMF, so FMFs can support a few higher-order spatial modes such as LP 11 modes in addition to the fundamental mode LP 01 (see inset of Fig. 1 for the mode structures). Thus the capacity of fiber network can be increased by using the multiplicity of space channels. Since practical quantum communication needs to employ fiber networks as the quantum channels, it is of great importance to evaluate whether the FMF network is capable of carrying quantum information. In a recent work, single photons and classical light were simultaneously transmitted over a 2-m-long FMF in different spatial and polarization mode...

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“…In systems with 40 Gb/s or higher bit rates, the residual dispersion slope would degrade system performance sufficiently. Dispersion slope compensation should be considered in high-speed optical system design [10] . Therefore, the 10.32-km DCF was designed with the capacities of both compensating dispersion and dispersion slope of standard single mode fiber (SSMF) used in a transmission line.…”

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confidence: 99%

Temperature independent 80 Gb/s transmission system using spectral phase modulation-based TDC

Zhong¹,

Li²,

Jia³

et al. 2012

中国光学快报

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A temperature independent 80-Gb/s 100-km transmission system is demonstrated with the use of spectral phase modulation-based tunable dispersion compensator (TDC). The principle of dispersion compensation based on spectral phase modulation as well as the relationship between spectral phase modulation function and group velocity dispersion (GVD) are theoretically studied. TDC based on spectral phase modulation is implemented. The performance of 80-Gb/s transmission system is experimentally evaluated. The nonlinear relationship between temperature and temperature-induced dispersion fluctuations is demonstrated through the asymmetric temperature-induced power penalty without dispersion compensation. With respect to the low temperature area, the temperature-induced dispersion fluctuations are smaller than those in the high temperature area. By using the proposed TDC, temperature independent 80-Gb/s transmission is successfully demonstrated under a temperature range of -20 -60• C with a power penalty of less than 0.8 dB.OCIS In recent years, with the growing demand for wideband communication systems, high bit rate (>40 Gb/s) transmission systems have attracted considerable attention. However, the introduction of high speed increases the impairment of data channels due to chromatic dispersion [1] , polarization mode dispersion (PMD) [2] , and nonlinearities [3] . Chromatic dispersion is a critical impairment that limits system performance. Moreover, dispersion fluctuations introduced by environmental changes such as temperature variations should be considered. Moreover, tunable dispersion compensation is a prerequisite in the design of high-speed transmission systems due to its tight dispersion tolerance.This issue has been extensively studied in recent years. André et al. pointed out that systems with 40 Gb/s or higher bit rates suffer serious impairments due to temperature-induced dispersion fluctuations, thus requiring tunable dispersion compensation [4] . One possibility of controlling the temperature of the dispersion compensating fiber (DCF) to dynamically compensate for the chromatic dispersion fluctuations induced by the environmental temperature alterations is presented [5] . However, in practical optical communication systems, DCF is a part of the transmission link buried underground together with G.652 fibers. Hence, it is impractical to control the temperature of DCF. Bourdoucen proposed a method to compensate for the temperature dispersion effect by adjusting the length of DCF [6] . However, the method is too complicated to be implemented in an installed fixed transmission link. Hirano et al. implemented a temperature independent transmission system using a zero-dispersion flattened transmission line [7] . However, the method used is dependent on specific fibers to form the zero-dispersion flattened transmission line.In this letter, we demonstrate a temperature independent 80-Gb/s transmission system using spectral phase modulation-based tunable dispersion compensator (TDC). We theoretically study the prin...

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Ultrahigh-Speed OTDM-Transmission Technology

Cited by 115 publications

References 64 publications

Optical frequency combs generated by four-wave mixing in optical fibers for astrophysical spectrometer calibration and metrology

Optical frequency combs generated by four-wave mixing in optical fibers for astrophysical spectrometer calibration and metrology

Distribution of Entangled Photon Pairs over Few Mode Fibers

Temperature independent 80 Gb/s transmission system using spectral phase modulation-based TDC

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