 Note |
For OPT-EDFA-17,
OPT-EDFA-35, or OPT-EDFA-24 card safety labels, see "Class 1M Laser Product
Cards."
|
 Note |
OPT-EDFA-35 card is supported only in NCS Flex and NCS SSON packages.
|
The OPT-EDFA-17, OPT-EDFA-24, and OPT-EDFA-35 cards
are C-band DWDM EDFA amplifiers and preamplifiers. The cards are true variable gain
amplifiers, offering an optimal equalization of the transmitted optical channels over a
wide gain range. They support 96 channels at 50-GHz channel spacing in the C-band (that
is, 1528.77 to 1566.72-nm wavelength range). The OPT-EDFA-17 and OPT-EDFA-24 cards
deliver 20-dBm output powers and the OPT-EDFA-35 card delivers +23-dBm output power.
These cards do not contain mid-stage access loss for a Dispersion Compensation Unit
(DCU). The cards provide a noise-figure optimized version of the EDFA amplifiers to cope
with new modulation formats like PM-DQPSK, which do not need dispersion compensation. To
control gain tilt, a VOA is used. The amplifier module also includes the OSC add (TX
direction) and drop (RX direction) optical filters.
The OPT-EDFA-17, and OPT-EDFA-24 cards share the same
hardware platform and firmware architecture, but they differ in their operative optical
gain range, which is 17 and 24 dB respectively.
The OPT-EDFA-35 card includes two identical amplification sections to serve two fiber
directions simultaneously. Each section has a switchable gain range that allows its
usage over a wide gain range. The OPT-EDFA-35 card is bidirectional. The card acts on
both pairs of fibers entering and exiting from the node.
The OPT-EDFA-35 card has two possible gain ranges: gain range 1 from 12–24, gain range 2 from
20–35. The card also has extended gain range up to 40 dB without tilt control.
The OPT-EDFA-35 card is managed in a similar way as the OPT-EDFA-17 and OPT-EDFA-24 cards. For
each EDFA unit inside the OPT-EDFA-35 card, the following settings are allowed:
-
Configuration of PRE or BST role
-
Configuration of Constant Gain working mode
-
Configuration of Gain Range
The main functionalities of the OPT-EDFA-17,
OPT-EDFA-24, and OPT-EDFA-35 cards are:
-
(OPT-EDFA-17 and OPT-EDFA-24)
Amplification of the input signal at the COM-RX port toward the LINE-TX port
through a true-variable gain EDFA block.
(OPT-EDFA-35) Two EDFA amplifier units
embedded into the card, amplification of the input signal at the LINE-1-RX port
toward the LINE-2-TX port through a true-variable gain EDFA-2 block, and
amplification of the input signal at the LINE-2-RX port toward the LINE-1-TX
port through a true-variable gain EDFA-1 block.
-
Multiplexing the OSC to the
LINE-TX port
-
Demultiplexing the OSC from the LINE-RX port
-
Monitoring of the LINE input
or output signal with 1% TAP splitters
The features of the OPT-EDFA-17, OPT-EDFA-24, and
OPT-EDFA-35 cards are:
-
Embedded Gain Flattening
Filter
-
Constant pump current mode
(test mode)
-
Constant output power mode
-
Constant gain mode
-
Nondistorting low-frequency
transfer function
-
ASE compensation in Constant
Gain and Constant Output Power modes
-
Fast transient suppression
-
Programmable tilt
-
Full monitoring and alarm
handling capability
-
Gain range with gain tilt control of 5–17 dB
(for OPT-EDFA-17 card) , 12 to 24 dB and 20 to 35 dB (for OPT-EDFA-35 card),
and 12–24 dB (for OPT-EDFA-24 card).
-
Extended gain range (with uncontrolled tilt)
of 17–20 dB (for OPT-EDFA-17 card) , (for OPT-EDFA-35 card) of upto 27dB
(for Gain Range1) and 40dB (for Gain Range2), and 24–27 dB (for
OPT-EDFA-24 card).
-
Optical Safety Remote
Interlock (OSRI)
-
Automatic Laser Shutdown (ALS)
You can install the OPT-EDFA-17 and OPT-EDFA-24 cards in slots
1–6 and 12–17 in ONS 15454 M12.
You can install the OPT-EDFA-17, OPT-EDFA-24, and OPT-EDFA-35 cards in the following slots: