Tunable DWDM Transceivers Featuring Flextune™ Wavelength Self-Tuning
2© Finisar Corporation
Benefits of Wavelength-Tunable DWDM Transceivers
Pluggable DWDM optical transceivers are a great way to lower your network infrastructure CapEx by transmitting multiple data links on a single fiber optics pair. However, they may add operational complexity and OpEx by having
to source multiple wavelength-specific Part Numbers/SKUs.
Wavelength-Tunable DWDM Transceivers offer considerable operational savings: Only a single Part Number/SKU is needed to cover the full
C-band (instead of 40 or 96). The required replacement inventory for sparing is significantly
reduced.
Duplex T-SFP+ Bidirectional T-SFP+
CH.1
CH.2...
CH.40
3© Finisar Corporation
Ok, But… Which Fibers should I Use?
However, a technician still needs to tune each transceiver to the proper wavelength and also match it to the proper optical mux/demux port…
Sometimes it’s not that obvious which optical fiber in the rack is the correct one to connect to the optical module…
Having to determine which mux/demux fiber to use gets even more complicated when trying to track them back to a 40-port Mux which could be a kilometer or more away…
4© Finisar Corporation
And… How Do I Set the Wavelength?
Technicians also may need to bring along “tuning boxes” and laptop computers to set each transceiver to a specific wavelength…
Or coordinate with the NOC to configure the right wavelength on each system port…
Setting up 40 or more modules could take several hours, assuming no system crashes or “blue screen” issues…
5© Finisar Corporation
Our Solution: Flextune™ Self-Tuning
Flextune™ is Finisar’s patented transceiver wavelength self-tuning feature.
It eliminates the need to track fibers as well as the need to have technicians carry around extra equipment to set the wavelength of each transceiver module.
Transceivers using this feature are truly “Plug-and-Play”, since no host system intervention is required.
6© Finisar Corporation
Outdoor (-40°C to 85°C)
Headend(-5°C to 70°C)
Example Use Case: Remote PHY P2P DWDM Network for MSOs
Optical M
ultiplexer
Ethernet Switch
Opt
ical
Mul
tiple
xer
Remote PHY
nodeRemote
PHY node
Remote PHY
node
Remote PHY
nodeRemote
PHY node
Coaxial Cable
300 meters
800 meters
2000 meters
1200 meters
100 meters
Each PHY node contains 1 10Gb/s transceiver
Up to 48 10Gb/s transceivers in Ethernet Switches (duplex transceivers shown)
Up to 48 Remote PHY nodes The Mux ports shown are ITU channel-specific and have passbands which
only support one 50GHz wavelength Downstream and upstream wavelengths are different in this example, as only
1 fiber strand linking the Multiplexers is shown
7© Finisar Corporation
Up to 80 km of fiber
Optical M
ultiplexer Opt
ical
Mul
tiple
xer
Near-end Wavelength-Tunable SFP+ Transceivers (duplex shown) Far-end Wavelength-Tunable SFP+ Transceivers (Up to 2 km of fiber)
Ch1Ch49Ch2Ch50Ch3Ch51Ch4Ch52Ch5Ch53Ch6Ch54Ch7Ch55Ch8Ch56
.
.
.
Ch17Ch89Ch18Ch90Ch19Ch91Ch20Ch92Ch21Ch93Ch22Ch94Ch23Ch95Ch24Ch96
T-SFP+T-SFP+T-SFP+T-SFP+T-SFP+T-SFP+T-SFP+T-SFP+
T-SFP+T-SFP+T-SFP+T-SFP+T-SFP+T-SFP+T-SFP+T-SFP+
T-SFP+T-SFP+T-SFP+T-SFP+T-SFP+T-SFP+T-SFP+T-SFP+
T-SFP+T-SFP+T-SFP+T-SFP+T-SFP+T-SFP+T-SFP+T-SFP+
Example: Remote PHY P2P DWDM Bidirectional Access Network
Ch1Ch49Ch2Ch50Ch3Ch51Ch4Ch52Ch5Ch53Ch6Ch54Ch7Ch55Ch8Ch56
.
.
.
Ch17Ch89Ch18Ch90Ch19Ch91Ch20Ch92Ch21Ch93Ch22Ch94Ch23Ch95Ch24Ch96
Tunable SFP+Tunable SFP+
8© Finisar Corporation
T-SFP+T-SFP+T-SFP+
T-SFP+T-SFP+T-SFP+T-SFP+
T-SFP+T-SFP+T-SFP+
T-SFP+T-SFP+T-SFP+T-SFP+
T-SFP+T-SFP+T-SFP+T-SFP+T-SFP+T-SFP+T-SFP+T-SFP+
T-SFP+T-SFP+T-SFP+T-SFP+T-SFP+T-SFP+T-SFP+T-SFP+
Up to 80 km of fiber
Optical M
ultiplexer Opt
ical
Mul
tiple
xer
Near-end Wavelength-Tunable SFP+ Transceivers (duplex shown)
Ch1Ch49Ch2Ch50Ch3Ch51Ch4Ch52Ch5Ch53Ch6Ch54Ch7Ch55Ch8Ch56
.
.
.
Ch17Ch89Ch18Ch90Ch19Ch91Ch20Ch92Ch21Ch93Ch22Ch94Ch23Ch95Ch24Ch96
Flextune Step 1: Near-end “Initial” Scan
Ch1Ch49Ch2Ch50Ch3Ch51Ch4Ch52Ch5Ch53Ch6Ch54Ch7Ch55Ch8Ch56
.
.
.
Ch17Ch89Ch18Ch90Ch19Ch91Ch20Ch92Ch21Ch93Ch22Ch94Ch23Ch95Ch24Ch96
Ch1
Near-end transmitter (Tx) starts its initial scan through available ITU wavelengths.
If Tx wavelength doesn’t match Mux port, the wavelength is blocked by the Mux filter.
Channel 1XX
Near-end “Initial” Scan
T-SFP+ T-SFP+
Tunable SFP+Tunable SFP+
Far-end Wavelength-Tunable SFP+ Transceivers (Up to 2 km of fiber)
9© Finisar Corporation
T-SFP+T-SFP+T-SFP+
T-SFP+T-SFP+T-SFP+T-SFP+
T-SFP+T-SFP+T-SFP+
T-SFP+T-SFP+T-SFP+T-SFP+
T-SFP+T-SFP+T-SFP+T-SFP+T-SFP+T-SFP+T-SFP+T-SFP+
T-SFP+T-SFP+T-SFP+T-SFP+T-SFP+T-SFP+T-SFP+T-SFP+
Up to 80 km of fiber
Optical M
ultiplexer Opt
ical
Mul
tiple
xer
Near-end Wavelength-Tunable SFP+ Transceivers (duplex shown)
Ch1Ch49Ch2Ch50Ch3Ch51Ch4Ch52Ch5Ch53Ch6Ch54Ch7Ch55Ch8Ch56
.
.
.
Ch17Ch89Ch18Ch90Ch19Ch91Ch20Ch92Ch21Ch93Ch22Ch94Ch23Ch95Ch24Ch96
Flextune Step 1: Near-end “Initial” Scan
Ch1Ch49Ch2Ch50Ch3Ch51Ch4Ch52Ch5Ch53Ch6Ch54Ch7Ch55Ch8Ch56
.
.
.
Ch17Ch89Ch18Ch90Ch19Ch91Ch20Ch92Ch21Ch93Ch22Ch94Ch23Ch95Ch24Ch96
Ch2
Near-end transmitter (Tx) starts its initial scan through available ITU wavelengths.
If Tx wavelength doesn’t match Mux port, the wavelength is blocked by the Mux filter.
Channel 2XX
Near-end “Initial” Scan
T-SFP+ T-SFP+
Tunable SFP+Tunable SFP+
Far-end Wavelength-Tunable SFP+ Transceivers (Up to 2 km of fiber)
10© Finisar Corporation
T-SFP+T-SFP+T-SFP+
T-SFP+T-SFP+T-SFP+T-SFP+
T-SFP+T-SFP+T-SFP+
T-SFP+T-SFP+T-SFP+T-SFP+
T-SFP+T-SFP+T-SFP+T-SFP+T-SFP+T-SFP+T-SFP+T-SFP+
T-SFP+T-SFP+T-SFP+T-SFP+T-SFP+T-SFP+T-SFP+T-SFP+
Up to 80 km of fiber
Optical M
ultiplexer Opt
ical
Mul
tiple
xer
Near-end Wavelength-Tunable SFP+ Transceivers (duplex shown)
Ch1Ch49Ch2Ch50Ch3Ch51Ch4Ch52Ch5Ch53Ch6Ch54Ch7Ch55Ch8Ch56
.
.
.
Ch17Ch89Ch18Ch90Ch19Ch91Ch20Ch92Ch21Ch93Ch22Ch94Ch23Ch95Ch24Ch96
Flextune Step 1: Near-end “Initial” Scan
Ch1Ch49Ch2Ch50Ch3Ch51Ch4Ch52Ch5Ch53Ch6Ch54Ch7Ch55Ch8Ch56
.
.
.
Ch17Ch89Ch18Ch90Ch19Ch91Ch20Ch92Ch21Ch93Ch22Ch94Ch23Ch95Ch24Ch96
Ch3
Near-end transmitter (Tx) starts its initial scan through available ITU wavelengths.
If Tx wavelength doesn’t match Mux port, the wavelength is blocked by the Mux filter.
Channel 3XX
Near-end “Initial” Scan
T-SFP+ T-SFP+
Tunable SFP+Tunable SFP+
Far-end Wavelength-Tunable SFP+ Transceivers (Up to 2 km of fiber)
11© Finisar Corporation
T-SFP+T-SFP+T-SFP+
T-SFP+T-SFP+T-SFP+T-SFP+
T-SFP+T-SFP+T-SFP+T-SFP+T-SFP+T-SFP+T-SFP+T-SFP+
T-SFP+T-SFP+T-SFP+
T-SFP+T-SFP+T-SFP+T-SFP+
T-SFP+T-SFP+T-SFP+T-SFP+T-SFP+T-SFP+T-SFP+T-SFP+
Up to 80 km of fiber
Optical M
ultiplexer Opt
ical
Mul
tiple
xer
Near-end Wavelength-Tunable SFP+ Transceivers (duplex shown)
Flextune Step 2: Near-end Wavelength Reaches Far-end
Ch4Channel 4√
Near-end WavelengthReaches Far-end
At some point in time, the near-end Tx wavelength will match the Mux port, and the signal will travel all the way through the network to the far-end receiver (Rx).
Once the far-end Rx detects the signal, then the transceiver will initiate its response.
Ch1Ch49Ch2Ch50Ch3Ch51Ch4Ch52Ch5Ch53Ch6Ch54Ch7Ch55Ch8Ch56
.
.
.
Ch17Ch89Ch18Ch90Ch19Ch91Ch20Ch92Ch21Ch93Ch22Ch94Ch23Ch95Ch24Ch96
T-SFP+ T-SFP+
Ch1Ch49Ch2Ch50Ch3Ch51Ch4Ch52Ch5Ch53Ch6Ch54Ch7Ch55Ch8Ch56
.
.
.
Ch17Ch89Ch18Ch90Ch19Ch91Ch20Ch92Ch21Ch93Ch22Ch94Ch23Ch95Ch24Ch96
Tunable SFP+Tunable SFP+
Far-end Wavelength-Tunable SFP+ Transceivers (Up to 2 km of fiber)
12© Finisar Corporation
T-SFP+T-SFP+T-SFP+
T-SFP+T-SFP+T-SFP+T-SFP+
T-SFP+T-SFP+T-SFP+
T-SFP+T-SFP+T-SFP+T-SFP+
T-SFP+T-SFP+T-SFP+T-SFP+T-SFP+T-SFP+T-SFP+T-SFP+
T-SFP+T-SFP+T-SFP+T-SFP+T-SFP+T-SFP+T-SFP+T-SFP+
Up to 80 km of fiber
Optical M
ultiplexer Opt
ical
Mul
tiple
xer
Near-end Wavelength-Tunable SFP+ Transceivers (duplex shown)
Flextune Step 3: Far-end “Special” Scan
Ch4Channel 50X
X
Far-end “Special” Scan
The far-end transmitter will then start a special scan through the available ITU wavelengths.
If Tx wavelength doesn’t match the Mux port, the wavelength is blocked by the Mux filter.
Ch50Ch4
T-SFP+T-SFP+
Ch1Ch49Ch2Ch50Ch3Ch51Ch4Ch52Ch5Ch53Ch6Ch54Ch7Ch55Ch8Ch56
.
.
.
Ch17Ch89Ch18Ch90Ch19Ch91Ch20Ch92Ch21Ch93Ch22Ch94Ch23Ch95Ch24Ch96
Ch1Ch49Ch2Ch50Ch3Ch51Ch4Ch52Ch5Ch53Ch6Ch54Ch7Ch55Ch8Ch56
.
.
.
Ch17Ch89Ch18Ch90Ch19Ch91Ch20Ch92Ch21Ch93Ch22Ch94Ch23Ch95Ch24Ch96
Tunable SFP+Tunable SFP+
Far-end Wavelength-Tunable SFP+ Transceivers (Up to 2 km of fiber)
13© Finisar Corporation
T-SFP+T-SFP+T-SFP+
T-SFP+T-SFP+T-SFP+T-SFP+
T-SFP+T-SFP+T-SFP+
T-SFP+T-SFP+T-SFP+T-SFP+
T-SFP+T-SFP+T-SFP+T-SFP+T-SFP+T-SFP+T-SFP+T-SFP+
T-SFP+T-SFP+T-SFP+T-SFP+T-SFP+T-SFP+T-SFP+T-SFP+
Up to 80 km of fiber
Optical M
ultiplexer Opt
ical
Mul
tiple
xer
Near-end Wavelength-Tunable SFP+ Transceivers (duplex shown)
Flextune Step 3: Far-end “Special” Scan
Ch4Channel 51X
X
Far-end “Special” Scan
The far-end transmitter will then start a special scan through the available ITU wavelengths.
If Tx wavelength doesn’t match the Mux port, the wavelength is blocked by the Mux filter.
Ch51Ch4
T-SFP+ T-SFP+
Ch1Ch49Ch2Ch50Ch3Ch51Ch4Ch52Ch5Ch53Ch6Ch54Ch7Ch55Ch8Ch56
.
.
.
Ch17Ch89Ch18Ch90Ch19Ch91Ch20Ch92Ch21Ch93Ch22Ch94Ch23Ch95Ch24Ch96
Ch1Ch49Ch2Ch50Ch3Ch51Ch4Ch52Ch5Ch53Ch6Ch54Ch7Ch55Ch8Ch56
.
.
.
Ch17Ch89Ch18Ch90Ch19Ch91Ch20Ch92Ch21Ch93Ch22Ch94Ch23Ch95Ch24Ch96
Tunable SFP+Tunable SFP+
Far-end Wavelength-Tunable SFP+ Transceivers (Up to 2 km of fiber)
14© Finisar Corporation
T-SFP+T-SFP+T-SFP+
T-SFP+T-SFP+T-SFP+T-SFP+
T-SFP+T-SFP+T-SFP+
T-SFP+T-SFP+T-SFP+T-SFP+
T-SFP+T-SFP+T-SFP+T-SFP+T-SFP+T-SFP+T-SFP+T-SFP+
T-SFP+T-SFP+T-SFP+T-SFP+T-SFP+T-SFP+T-SFP+T-SFP+
Up to 80 km of fiber
Optical M
ultiplexer Opt
ical
Mul
tiple
xer
Near-end Wavelength-Tunable SFP+ Transceivers (duplex shown)
Ch1Ch49Ch2Ch50Ch3Ch51Ch4Ch52Ch5Ch53Ch6Ch54Ch7Ch55Ch8Ch56
.
.
.
Ch17Ch89Ch18Ch90Ch19Ch91Ch20Ch92Ch21Ch93Ch22Ch94Ch23Ch95Ch24Ch96
Flextune Step 4: Far-end Wavelength Reaches Near-end
Ch4Ch52Ch4
Once the far-end Tx wavelength matches the Mux port, the signal will travel all the way through the network to the near-end Rx.
At that point, a handshake occurs which locks the wavelengths of both transceivers.
Normal data transmission begins. The process occurs simultaneously on every transceiver
installed with Flextune™ enabled
Far-end Wavelength Reaches Near-end
LINK ESTABLISHED!
Ch52
Ch1Ch49Ch2Ch50Ch3Ch51Ch4Ch52Ch5Ch53Ch6Ch54Ch7Ch55Ch8Ch56
.
.
.
Ch17Ch89Ch18Ch90Ch19Ch91Ch20Ch92Ch21Ch93Ch22Ch94Ch23Ch95Ch24Ch96
T-SFP+ T-SFP+
Tunable SFP+Tunable SFP+
Far-end Wavelength-Tunable SFP+ Transceivers (Up to 2 km of fiber)
15© Finisar Corporation
Value Proposition of Flextune™
Up to 96 wavelength-tunable transceivers in a DWDM network will automatically configure their wavelengths within approximately 5 minutes without any input from field technicians or the host network equipment.
Greatly Reduces Operational Expenditures: Saves hours in deployment: Configuration of wavelengths is automatic – Technicians
do not have to manually set the wavelengths of the tunable transceivers or determine which fixed-wavelength transceivers to use.
Reduces complexity: Technicians install the wavelength tunable transceivers into any host port and connect the jumper cables to any fiber port on the DWDM optical Mux.
Eliminates need to track fibers from the DWDM optical Mux to the transceivers (which could be up to 2 km away from each other).
16© Finisar Corporation
Summary of Finisar Flextune™ Benefits
Finisar is enabling and offering considerable operational savings to customers through its patented Flextune™ wavelength self-tuning feature: No fiber tracking is needed No wavelength tuning is needed No host system configuration is needed No technician intervention is needed
Wavelength-tunable modules from Finisar with Flextune™ are in production and available NOW!
Duplex T-SFP+
Bidirectional T-SFP+
17© Finisar Corporation
More information at: www.finisar.com/flextune