1 Scope
2
References
3
Terminology
4
Abbreviations
5
Classification of optical interfaces
5.1 Applications
5.1.1 Application codes for systems without
line amplifiers
5.1.2 Application codes for systems with line
amplifiers
5.2 Implementation
5.2.1 Reference configurations
5.2.2 Optical supervisory channel
implementations
6
Parameter definitions
6.1 Individual transmitter
outputs
6.1.1 Spectral characteristics
6.1.2 Mean launched power
6.1.3 Extinction ratio
6.1.4 Eye pattern mask
6.1.5 Central frequency
6.1.6 Channel spacing
6.1.7 Central frequency deviation
6.2 Individual channel input ports
6.3 Optical interface at points MPI-S and S'
6.3.1 Optical transmit-side crosstalk
6.3.2 Channel output power
6.3.3 Total launched power
6.3.4 Channel optical signal-to-noise ratio
6.3.5 Maximum channel power difference at point
MPI-S or point S'
6.4 Optical path
6.4.1 Attenuation
6.4.2 Dispersion
6.4.3 Reflections
6.5 Optical line amplifier parameters
6.5.1 Multichannel gain variation
6.5.2 Multichannel gain tilt
6.5.3 Multichannel gain-change difference
6.5.4 Total received power
6.5.5 Total launched power
6.5.6 Signal spontaneous noise figure
6.6 Optical interface at points MPI-R and R'
6.6.1 Mean channel input power
6.6.2 Mean total input power
6.6.3 Channel optical signal-to-noise ratio
6.6.4 Optical crosstalk at points MPI-R and R'
6.6.5 Maximum channel power difference at point
MPI-R or at point R'
6.7 Individual channel output ports
6.7.1 Optical crosstalk at individual channel
output ports
6.8 Individual receiver inputs
6.8.1 Receiver sensitivity
6.8.2 Receiver overload
6.8.3 Optical path penalty
6.8.4 Receiver reflectance
6.8.5 Optical signal-to-noise ratio
6.8.6 Receiver wavelength range
6.9 Optical supervisory channel parameters
6.9.1 Optical supervisory channel wavelength
7
Optical interface parameter
values
Annex A – Nominal central frequencies
Annex B – Alternative optical supervisory channel approaches
B.1 OSC at 1480 nm
B.2 OSC in 1310 nm band
B.3 OSC within EDFA gain bandwidth
Appendix I – Methodology for derivation of optical power levels
I.1 Channel power
I.1.1 Minimum channel power
I.1.2 Maximum channel power
I.1.3 Maximum range for channel power
I.2 Maximum total power
Appendix II – Selection of the minimum channel spacing and grid reference
frequency for the WDM plan
II.1 50 GHz/100 GHz spacing and 193.10 THz reference
II.2 Absolute frequency reference (AFR)
II.2.1 AFR
accuracy
II.2.2 AFR stability
Appendix III – Suggested channel frequency allocations for applications on
G.652/G.655 fibres
Appendix IV – Suggested channel frequency allocations for applications on G.653
fibres
Appendix V – A channel-allocation methodology for applications on G.653
fibre based on unequal channel spacing
V.1 How to determine unequally-spaced channel frequencies
V.1.1 Basic design conditions
V.1.2 Determination of frequency slot
V.1.3 Required optical bandwidth for unequally
spaced frequency allocation
V.2 Unequally spaced channel frequency allocation with 25 GHz
frequency slot
V.3 Unequally spaced channel frequency allocation with 50 GHz
frequency slot
V.4 Unequal channel frequency allocation with 100 GHz frequency
slot
V.5 Impacts of unequal spacing on other parameters
V.5.1 Frequency deviation for unequal spacing
with frequency offset
V.5.2 Power Levels
V.6 Bibliography
Appendix VI – Use of pre-equalisation at MPI-S
Appendix VII – Extension of G.692 to include bidirectional WDM transmission
Appendix VIII – Extension of G.692 to include 16- and 32- or more channel
transmission
Appendix IX – Extension of G.692 to include STM-64 bit-rate