V011 1-
Erbium-Doped Fiber Amplifier (EDFA) - MW Series
Nanovation’s MW series of EDFA products is designed for applications in advanced
dense wave division multiplexing (DWDM) systems where high per formance and
reliability are critical. They are available in Booster, Inline and Preamplifier configurations
to cover a wide range of applications in the full C-Band. A sophisticated micro-controller
monitors and controls the internal components, while the incorporated RS-232 inter face
permits the user to remotely control the device or monitor the internal fault alarms.
These devices can be programmed to operate in either the constant gain or constant
power mode. The integrated control system assures that adding or dropping wavelengths
in state-of-the-art DWDM systems is accomplished with minimum system disturbance.
Features
•Excellent gain flatness over the full C-Band
•High saturated output power
•Low noise figure
•Internal microcontroller for monitoring, alarm and
control functions
•AGC, APC or ACC operation mode with AGC as default
•Input and output optical isolation and power monitoring
•TTL compatible alarm and warning capability
•Low power consumption, single 5V power supply operation
•RS-232 serial interface for system integration and diagnostics
•Wide operating temperature and humidity ranges
•Compact packaging
•Bellcore GR-1312-CORE qualified and ISO 9001 cer tified
Applications
•High per formance Full C-Band DWDM systems
•Booster, inline or preamplifier configurations
Product Description
General
The MW series of EDFA products has been specially
designed for use in DWDM transmission systems as a
booster, inline, or preamplifier. A sophisticated internal
electronic control system maintains the per formance
of the module, provides monitoring information, enables
the module to be set to specific operational states, and
incorporates a series of alarm signals associated with a
range of potential system faults. Each module can oper-
ate under independent control in combinations of con-
stant output power or constant gain control with fast
transient suppression. This function is provided by the
microcontroller that monitors the input power and drives
the pump lasers under closed-loop feedback control.
These features permit wavelengths to be rapidly added
or dropped from the amplifier while controlling the impact
on the remaining channels.
Optical
The amplifiers have been optimized for the full C-Band
(1530 to 1562 nm) gain-bandwidth DWDM operations by
careful selection of both passive and active components.
All amplifiers are pumped with high reliability pumps, and
are provided with optical monitor outputs to allow cus-
tomer spectral analysis or monitoring of the amplified sig-
nal. An optical output monitor port is a customer option
that can assist the user in such analysis or monitoring.
Operation mode
AGC (Automatic Gain Control) - default
APC (Automatic Power Control) - optional
ACC (Automatic Current Control) – for per formance
monitoring
Electrical
Electrical connection is through a standard male DB25
connector.
Control System
Internal electronic circuits provide the pump lasers with
electrical transient protected power supply and tempera-
ture control. A microcontroller monitors and controls the
module and provides an external RS232 serial inter face,
through which operation mode and other configurations
can be customized. A series of digital outputs provides a
set of alarms that indicate a range of module and sys-
tem faults.
Package
The units are housed within ver y small modules with
input and output connections through single mode fiber
pigtails and are fitted as standard with super-polished
FC/UPC or FC/APC connectors. Other types of connec-
tors are available on request.
V0111-20
Erbium-Doped Fiber Amplifier (EDFA) - MW Series
Absolute Maximum Ratings
(in accordance with Bellcore GR-1312-CORE)
Pigtail Fiber
MW EDFA Typical Performance Curves
Boost Configuration
Parameter Min. Typical Max. Unit
DC Operating Voltage +4.75 +5.0 +5.25 V
Current Consumption - - 3.0 A
Operating Temperature Range 0 - 70 °C
Storage Temperature Range -25 - 85 °C
Operating Humidity Range 5 - 85 %
Fiber Type Standard single-mode fiber
Fiber/Buffer Diameter (mm) 0.9
Pigtail Length (m) 1.0 (or user defined)
V011 1-21
Erbium-Doped Fiber Amplifier (EDFA) - MW Series
MW Series EDFA Electrical Interface
The MW series of EDFA products is equipped with a standard DB25 male connector. The functionality
of each pin is presented below:
TTL Input/Output Monitor and Control Logic Levels
•The TTL input and output monitor (AL1 – AL6) and control logic (Adis) levels are presented in the following table.
•The correspondence between the analog optical signal level and the analog voltage output is typical. The actual
analog sensitivity coefficients are supplied with each EDFA.
Function In/Out TTL High TTL Low
Internal Temperature Monitor (pin 7) Out Normal Alarm
Output Power Monitor (pin 8) Out Normal Alarm
Pump Laser Current Monitor (pin 9) Out Normal Alarm
Pump Laser Temperature Monitor (pin 10) Out Normal Alarm
Reflected Output Power Monitor (pin 11) Out Normal Alarm
Input Power Monitor (pin 19) Out Normal Alarm
Pump Toggle Switch (pin 21) In Pumps OFF Pumps ON
Analog Control Voltage (Within Normal Range) Analog Output Range
Output Power Control Voltage (pin 5) 0~4.7 volts
Input Power Control Voltage (pin 6) 0~4.7 volts
Pin Symbol Description
1 Vcc Power Supply: +5volts DC, +/- 5%, Imax =3.0 A
2 Vcc Power Supply: +5volts DC, +/- 5%, Imax =3.0 A
3 Vcc Power Supply: +5volts DC, +/- 5%, Imax =3.0 A
4 Vcc Power Supply: +5volts DC, +/- 5%, Imax =3.0 A
5 Pout Output Power Monitor
6 Pin Input Power Monitor
7 AL1 Alarm Mode 1- Internal temperature exceeds preset value
8 AL2 Alarm Mode 2- Optical output power decreases 2dB below preset value
9 AL3 Alarm Mode 3- Pump laser current decreases 1 mA below preset value
10 AL4 Alarm Mode 4- Pump laser temperature exceeds preset value
11 AL5 Alarm Mode 5- Reflected output power exceeds preset value
12 Vcc Power Supply: +5volts DC, +/- 5%, Imax =3.0 A
13 GND Power supply ground / case
14 GND Power supply ground / case
15 GND Power supply ground / case
16 GND Power supply ground / case
17 GND Power supply ground / case
18 TXD RS-232 DATA OUT (TTL Levels)
19 AL6 Alarm Mode 6 – Optical input power decreases below preset value
20 N/C
21 Adis Pump laser ON/OFF toggle
22 RXD RS-232 DATA IN (TTL Levels)
23 N/C
24 Vcc Power Supply: +5volts DC, +/- 5%, Imax =3.0 A
25 GND Power supply ground
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Erbium-Doped Fiber Amplifier (EDFA) - MW Series
MW Series EDFA Operation Mode
The MW series of EDFA products has two basic modes of operation: automatic gain control (AGC) and automatic current
control (ACC). Either mode can be set via the RS-232 inter face. In addition, automatic power control (APC) can be pro-
vided as a customer optional mode. The factory default mode is AGC and it is stored in the microcontroller’s permanent
memory. The ACC mode is enabled during production to test the EDFA parameters.
AGC - Operating Conditions (Normal Mode)
1. EDFA receives "switch on pump laser" command (Adis)
2. The output return loss must be lower than the output return loss threshold
The operating current of pump laser 1 (or pump laser 1 and pump laser 2) is adjusted automatically to keep the gain
constant over a wide range of optical input. Changes in the output power correspond to changes in input power while
the gain is held constant.
1. If the input signal is above the AGC maximum limit, the pump laser will operate at its maximum current in
the range of 180 to 250 mA
2. If the input signal is below the AGC input threshold level, the pump laser will operate at its minimum current
in the range of 30 to 50 mA
3. If there is no input signal, the pump laser will operate at its minimum current and the corresponding output
ASE will be in the range of +3 to +5 dBm
ACC - Operating Conditions (Factory Mode)
1. EDFA receives the "switch on the pump laser" command (Adis)
2. The output return loss must be lower than the output return loss threshold
Pump laser 1 (or pump laser 1 and pump laser 2) operates at the maximum working current whether or not an input sig-
nal is present. If the input signal is present, the EDFA produces the maximum gain. If the input signal is absent, the
output level produced by ASE (amplified spontaneous emission) is about +10 dBm.
Outline Drawing
(all dimensions are in mm; drawings are not to scale)
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Erbium-Doped Fiber Amplifier (EDFA) - MW Series
Block Diagram
Optical Parameters
(over the full operating temperature range)
Parameter Minimum Typical Maximum Units Notes
Wavelength (ITU-T G.692) 1530 - 1562 nm Full C-Band
-20 - -7 dBm Booster
Input Power -28 - -16 dBm Inline
-28 - -16 dBm Preamplifer
- 18 22 dBm Booster
Saturated Output Power - 17 20 dBm Inline
- 9 15 dBm Preamplifer
- 25 - dB Booster
Signal Gain - 33 - dB Inline
- 25 - dB Preamplifer
Gain Flatness - 1.0 1.5 dB -
Dynamic Gain Variation - 1.0 1.5 dB -
Optical Isolation 30 35 - dB -
Input Return Loss 50 - - dB UPC/APC
Noise Figure 5.0 5.5 dB -
Polarization Dependent Gain - - 0.5 dB -
Polarization Mode Dispersion - - 0.2 ps -
Pump Leakage - - -30 dBm -
Reverse ASE Power - < -20 - dBm -
Power Consumption - 15 - W -
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Erbium-Doped Fiber Amplifier (EDFA) - MW Series
Ordering Information
The following table summarizes the product options and provides examples:
To order or for additional information, please contact us at:
Phone: 1-877-919-6266
Fax: 1-734-354-0934
Web: www.nanovation.com
All data listed in this specification sheet is subjected to change without notice.
Nanovation reser ves the right to revise or update the data sheet.
Copyright 2001 by Nanovation Technologies
Safety Information and Handling Precautions
EDFAs are class III laser products. Please read carefully the following safety information prior to handling and installing.
The signal output of the pump laser and EDFA is invisible, yet it can be of high power level
and therefore can cause damage to the eyes or skin. Please do not look at the fiber cross
section directly without protection devices.
There are precision optical devices inside the EDFA; therefore extreme care should be taken
not to impose excess vibration or shaking. Care should also be taken in handling the pigtail
fibers since they are easily broken.
There are static sensitive devices inside the EDFA, please make sure proper grounding
and electrical power connection.
Do not attempt to open the EDFA by any unauthorized personnel. Please contact Nanovation
technical support for assistance.
M W X X X 0 X X - X X X
Connector Type
0: No connector
1: FC/UPC (standard)
2: FC/APC
3: SC/UPC
4: SC/APC
Pigtail Fiber Length
0: Standard length = 1 m (standard)
1: User specify
Fiber Type
0: Standard single-mode (standard)
1: User specify
Output Power
09: 9 dBm
17: 17 dBm
18: 18 dBm
Operating Wavelength
0: Red Band (1545 to 1562nm)
1: Full Band (1530 to 1562nm)
Product Series
5 Booster
6: Inline
7: Preamplifier
Amplifier Type
B: Booster
L: Line
P: Preamplifier
Part Amplifier Input Power Output Power Gain Operation Dimension
Number Type (dBm) (dBm) (dB) Band (nm) (mm x mm x mm)
MWB 510 18 001 Booster -20 to -7 18 25 Full 150 x 124 x 20
MWL 610 17 001 Inline -28 to -16 17 33 Full 150 x 124 x 20
MWP 710 09 001 Preamplifier -28 to -16 9 25 Full 150 x 124 x 20
