A comparison of the homodyne crosstalk characteristics of optical add-drop multiplexers

Dods, S.D.; Tucker, R.S.

doi:10.1109/50.971674

Cited by 25 publications

(18 citation statements)

References 30 publications

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“…Inserting (10) into (5) and (6) we get after some algebra (13) (14) with (15) (16) and (17) where is given by (15) with replaced by and replaced by , whereas is given by (16) with replaced by . In (17), the random coefficients are mutually independent zero-mean Gaussian random variables, with variances , for , since according with (17) and (12) we have (18) where is the Dirac delta function and the operator denotes the expected value. An additional simplification can be obtained in (15) and (16) by assuming that is constant over the interval giving…”

Section: Decision Variable Modeling Andmentioning

confidence: 99%

“…The improved tolerance of DPSK towards crosstalk is particularly advantageous in optical networking environments, because due to imperfections of optical devices used to build network elements, such as OADMs, optical cross-connects, optical burst switches, as well as from spurious reflections inside the network, there are many leakage signals that interfere with the desired signal originating crosstalk [18]- [20]. It is well known that this phenomenon can be particularly damaging when the interference and the signal have the same nominal wavelength, leading to the so-called in-band or homodyne crosstalk, since in this case the signal-crosstalk beatings originated at the receiver can not be filtered out, becoming, as a consequence, an important source of signal quality degradation.…”

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confidence: 99%

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Estimating the Performance of Direct-Detection DPSK in Optical Networking Environments Using Eigenfunction Expansion Techniques

Pires

Cancela

2010

J. Lightwave Technol.

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Abstract-In-band crosstalk, due to multiple interferers, has been identified as one of the most severe impairments in optical transparent networks, especially in the ones with a large number of nodes and a high wavelength density. Due to its robustness to in-band crosstalk differential phase-shift keying (DPSK) emerges as an attractive modulation scheme to be used in such environments. This paper proposes a rigorous formulation to estimate the performance of direct-detection DPSK receivers using an eigenfunction expansion technique in the time domain. The method takes into account both the in-band crosstalk, due to an arbitrary number of interfering terms, and the amplified spontaneous emission noise and is able to deal with any combination of optical and electrical filter shapes. Using this method the accuracy of an approximation based on the wideband optical filtering assumption was evaluated and shown that the approximation, although not providing reliable results for the error probabilities, can be used with confidence to compute power penalties due to in-band crosstalk. Furthermore, the crosstalk tolerance of DPSK over on-off keying was quantified and shown that this tolerance is reduced when the number of interferers increases.Index Terms-Differential phase-shift keying, eigenvalues and eigenfunctions, in-band crosstalk, optical networking.

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Section: Decision Variable Modeling Andmentioning

confidence: 99%

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confidence: 99%

Estimating the Performance of Direct-Detection DPSK in Optical Networking Environments Using Eigenfunction Expansion Techniques

Pires

Cancela

2010

J. Lightwave Technol.

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“…The used OADM configuration is based on 180°optical hybrids and FBG (details see in [23]). The crosstalk level to the leakage path between DROP and ADD port is 60 dB.…”

Section: Short Overview Of the Derived Power Consumption Modelmentioning

confidence: 99%

Energy efficiency in WDM fiber-optical links considering OADM/OXC nodes

Udaļcovs

Bobrovs

2016

Optics Communications

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“…Homodyne crosstalk can be incoherent or coherent [7]. Coherent homodyne crosstalk causes a fading effect on the signal, which does not normally cause degradation of the TON performance [8]. However, coherent homodyne crosstalk combined with incoherent homodyne crosstalk leads to the fluctuation of the power penalty due to incoherent homodyne crosstalk over time [7][8][9].…”

Section: R G Leiria and A V T Cartaxomentioning

confidence: 99%

Optimization of Optical Add-Drop Multiplexers Based on Arrayed Waveguide Gratings with Fabrication Errors for Transparent Optical Networks

Leiria

Cartaxo

2006

Fiber and Integrated Optics

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A transparent optical network (TON) composed by optical add-drop multiplexers based on arrayed waveguide grating (AWG) with fabrication errors is optimized for10 Gbit/s per channel and channel spacing of 25 GHz. The optimization takes into account the effect of inter-symbol interference, amplified spontaneous emission noise accumulation, and coherent and incoherent homodyne crosstalk. Numerical results reveal that AWG fabrication errors can have a high influence on the TON performance; however, in all investigated situations, they do not affect the AWG parameters values corresponding to the optimum AWG frequency response. This surprising behavior is due to the fabrication errors affect mainly the AWG response outside the passband for the required AWG crosstalk level. It is shown that the optimum AWG frequency response is a flat-top response with a mean amplitude response outside the passband lower than −30 dB and the switch isolation should exceed 30 dB.

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A comparison of the homodyne crosstalk characteristics of optical add-drop multiplexers

Cited by 25 publications

References 30 publications

Estimating the Performance of Direct-Detection DPSK in Optical Networking Environments Using Eigenfunction Expansion Techniques

Estimating the Performance of Direct-Detection DPSK in Optical Networking Environments Using Eigenfunction Expansion Techniques

Energy efficiency in WDM fiber-optical links considering OADM/OXC nodes

Optimization of Optical Add-Drop Multiplexers Based on Arrayed Waveguide Gratings with Fabrication Errors for Transparent Optical Networks

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