BSI PD IEC/TR 61282-12:2016
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Fibre optic communication system design guides – In-band optical signal-to-noise ratio (OSNR)
| Published By | Publication Date | Number of Pages |
| BSI | 2016 | 38 |
The purpose of this part of IEC 61282, which is a Technical Report, is to provide a definition for in-band optical signal-to-noise ratio (OSNR) that is applicable to situations where the spectral noise power density is not independent of the optical frequency, as assumed in the OSNR definition of IEC 61280-2-9, but is significantly shaped across the optical bandwidth of the signal. Considering the development of multiple measurement methods for different use cases, as detailed below, it is desirable to establish a definition of in-band OSNR that is independent of the method used and, furthermore, is consistent with the OSNR definition of IEC 61280-2-9 in the case of frequency-independent noise power density.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 4 | CONTENTS |
| 6 | FOREWORD |
| 8 | 1 Scope 2 Normative references 3 Terms and definitions |
| 10 | 4 Background 4.1 General |
| 11 | 4.2 Higher spectral density of signals Figures Figure 1 – Optical power spectrum composed of a modulated signal and ASE noise |
| 12 | 4.3 Spectral filtering in wavelength-routing elements Figure 2 – Optical power spectrum of 50-GHz spaced 40 Gbit/s RZ-DQPSK signals with significant spectral overlap |
| 13 | 4.4 Transmission of signals with multiple subcarriers Figure 3 – Optical power spectrum of 50-GHz spaced 10 Gbit/s NRZ-OOK signals after spectral filtering in ROADMs Figure 4 – Optical power spectrum of a 400 Gbit/s optical “superchannel” comprised of four very densely spaced 100 Gbit/s PM-QPSK signals |
| 14 | 5 In-band OSNR measurement with spectrally shaped noise 5.1 Measurement of in-band ASE noise |
| 15 | 5.2 In-band OSNR definitions 5.2.1 Background 5.2.2 Spectrally integrated in-band OSNR |
| 16 | 5.2.3 In-band OSNR from averaged noise power spectral density 5.2.4 In-band OSNR from maximal noise power spectral density |
| 17 | 5.2.5 In-band OSNR for individual optical subcarriers 5.3 Spectral shaping of ASE noise 5.3.1 General 5.3.2 Case (a): ASE noise shaped outside of the signal spectrum |
| 18 | 5.3.3 Case (b): ASE noise shaped within the signal spectrum Figure 5 – Power spectral density of a 10 Gbit/s signal with ASE noise that has been shaped by a relatively broad optical filter |
| 19 | 5.3.4 Case (c): ASE noise shaping in a ROADM network Figure 6 – Power spectral densities of a broadband 40 Gbit/s signal and ASE noise which have been shaped by the same filter Figure 7 – Variation of the in-band OSNR values Rint, Ravg and Rmax versus filter bandwidth for the signal shown in Figure 6 |
| 20 | Figure 8 – Optical power density spectra of signal and ASE noise after filtering in a ROADM network with intermediate amplification |
| 21 | 6 Guidelines for using the definitions 6.1 General Figure 9 – Variation of the in-band OSNR values Rint, Ravg and Rmax versus number of filters for the signal shown in Figure 8 |
| 22 | 6.2 Wavelength integration range |
| 23 | Figure 10 – Impact of integration range on Rint for 43 Gbit/s RZ-DPSK signals in a ROADM network Figure 11 – Impact of instrument noise on s(ν)/ρ(ν) for strongly filtered 10 Gbit/s NRZ-OOK signals |
| 24 | 6.3 Spectral resolution |
| 25 | Figure 12 – Dependence of in-band OSNR on spectral resolution for 43 Gbit/s RZ-DQPSK signals |
| 26 | Figure 13 – Dependence of in-band OSNR on spectral resolution for 10 Gbit/s NRZ-OOK signals |
| 27 | 7 In-band OSNR penalties of filtered signals 7.1 Scope of simulations |
| 28 | 7.2 Results for 43 Gbit/s RZ-DQPSK Figure 14 – ROADM filter arrangements for OSNR penalty simulations |
| 30 | Figure 15 – In-band OSNR penalties for filtered 43 Gbit/s RZ-DQPSK signals |
| 31 | Figure 16 – In-band OSNR penalties for filtered 128 Gbit/s PM NRZ-QPSK signals |
| 32 | Figure 17 – In-band OSNR penalties for filtered 10 Gbit/s NRZ-OOK signals |
| 33 | 7.3 Results for 128 Gbit/s PM NRZ-QPSK 7.4 Results for 10 Gbit/s NRZ-OOK 7.5 Observations |
| 35 | Bibliography |
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BSI PD IEC/TR 61282-12:2016
Fibre optic communication system design guides – In-band optical signal-to-noise ratio (OSNR) Published By Publication…
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BSI PD IEC/TR 61282-12:2016
Fibre optic communication system design guides – In-band optical signal-to-noise ratio (OSNR) Published By Publication…
