Data
sheet
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Multiwavelength Gain
Module EDFA
Bookham Technology's MultiWavelength Gain Modules
are supplied with the EDFA optical, optoelectronic
and electronic functions built in, requiring only a +5 V power
supply for operation. They allow sophisticated optical
amplifier card level solutions to be implemented very easily.
The MultiWavelength Gain Module optical amplifiers have been
specially designed for use in wide bandwidth DWDM optical
transmission systems. The series, consisting of a number
of standard configurations, has been designed to allow rapid
customisation to meet the widely varying requirements
of customer specific system design.
Through selection of certain component values within the gain
block, the designs can be rapidly customised to meet specific
amplifier requirements for output power and gain. All of the
amplifiers also have an integrated optical output monitor port.
A combination of a pre-amplifier and a line amplifier gives
the option of Mid-Stage Access (MSA) to allow insertion
of network components such as add-drop multiplexers,
dispersion compensators or optical attenuators.
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Features
High reliability
Semi-custom design flexibility
Fast gain and transient control
modes
Single +5 V supply operation
Low power consumption
Low noise figure
Low gain ripple over temperature
Optical output monitor
Applications
DWDM Pre-Amplifier
DWDM Line Amplifier
General Information Gain and Transient Control
The amplifier modules incorporate a powerful, processor-controlled gain and transient control system for optimum performance.
Input and output powers are continually monitored to dynamically maintain the desired operating gain under changing input
conditions. This scheme permits wavelengths to be added or dropped whilst maintaining performance of the remaining
channels. A simple serial interface to the processor allows amplifier configuration and monitoring functions to be carried out.
Electrical Power Supplies
The electrical power required by the unit is supplied from a single rail power supply. Maximum power dissipation values
include a 5 W contribution from the erbium heater available with products containing METEOR electronics. Maximum values
could be reached at a combination of switch on, end of life and low ambient temperature.
Optical
The amplifiers have been optimized for full-band gain-
bandwidth DWDM operation by careful selection of both
passive and active components. All amplifiers are pumped
with high reliability 980 nm and 1480 nm pumps and are
provided with optical monitor outputs to allow customer
spectral analysis or monitoring of the amplified signal.
Electrical
Electrical connection is through a male DB25 connector.
Package
The units are housed within a metal package, allowing an
attachment of a heatsink to the base. Optical connections
are made through single mode fibre pigtails with SC/PC
connectors as standard.
Standard Configurations
Both full band (1530 -1563 nm) and extended band
(1570 - 1603 nm) amplifiers are available in two basic
configurations: Pre-amplifier and Line amplifier. Full band
amplifier varients are pre-fixed with F and extended band
with E.
Pre-amplifiers
FP-1 Provides a total output power in the region of
14 dBm and has both input and output isolators.
FP-2 Provides similar performance to P-1, but has
no input isolator, thereby providing a lower noise figure.
EP-2 Provides a total output power in the region of
14 dBm and has both input and output isolators.
Line amplifiers
FL-1 Typically provides output power in the region of
17 dBm. (Dual pump)
FL-2 Typically provides output power in the region of
21 dBm. (Triple pump)
EL-1 Typically provides output power in the region of
21 dBm. (Triple pump)
Parameters specified in the individual datasheets
are valid over temperature, wavelength and life unless
otherwise stated.
Parameter
Min
Typ
Max
Positive supply voltage
+4.75 V
+5.0 V
+5.25 V
Power dissipation (Start of Life)
Preamp
-
2.5 W
-
Dual pump line
-
5 W
-
Triple pump line
-
7 W
-
Power dissipation (End of Life)
Preamp
-
-
12.5 W
Dual pump line
-
-
23.5 W
Triple pump line
-
-
35 W
Ripple noise
-
-
2%PP
Transient pulse
+4.6 V for 75 ms.
+6.0 V for 75 ms.
Radiated emissions
EN5022 class B
Conducted emissions
EN5022 class B
Radiation immunity
IEC801-3
ESD
IEC801-2
Temperature range (Case)
0C
65C
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Conne ctor Ce ntr e
12.9
62.5
13
125
150
R25
R28.5
22
20.3
119
64
27.
5
3
3
53.2
144
A
A
A
A
B
B
32.
6
32.
6
9 Pitch ( TYP)
3.3 Clockw ise
4.2 C- Clockwise
HOLE DESCRIPTION
QTY
A
M3x 0.5 x 1.3 De e p
4
B
M3x 0.5 x 8 De e p
2
Outline Drawing
Dimensions in mm
PIN #
Function
PIN #
Function
1
+5.0 V
14
GND
2
+5.0 V
15
GND
3
+5.0 V
16
GND
4
+5.0 V
17
GND
5
Output power monitor
18
RS-232 OUT (TTL Levels)
6
Input power monitor
19
Loss of input power alarm
7
EDFA temperature alarm
20
Output power mute input
8
Loss of output power alarm
21
Amplifier disable input
9
Pumps bias alarm
22
RS-232 IN (TTL Levels)
10
Pumps temperature alarm
23
N/C
11
N/C
24
+5.0 V
12
+5.0 V
25
GND
13
GND
-
-
Connector Pin -Out
The pinout for the male DB25 connector
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Instructions for Use - MGM
Pin 1, 2, 3, 4, 12, 24 +5.0 V Supply
DC voltage between 4.75 and 5.25 V should be made
to all pins. Current requirement is dependent on amplifier
type - see the power supply section for details.
Pin 5 Output Power Monitor
A DC voltage that is proportional to the amplifier output
power. For a preamp, this voltage is approximately
30 mV/mW. For a line amplifier, the factor is 12.9 mV/mW.
Pin 6 Input Power Monitor
A DC voltage that is proportional to the amplifier input
power. For a preamp or line amp, this voltage is
approximately 1.6 V/mW.
Pin 7 EDFA Temperature Alarm
This is a TTL logic level alarm which is normally at logic
"0". When the EDFA internal temperature exceeds
65C, the alarm is activated (logic "1").
The temperature sensor is located on the pcb.
Pin 8 Loss of Output Power Alarm
This is a TTL logic level alarm, normally at logic "0".
The alarm is raised to logic level "1" if the amplifier output
power is more than 2 dB different from the set value.
This function is active in Output power, Drive or Gain
modes. In Drive mode, the alarm threshold is taken as
the last value stored for either Output or Gain mode.
Pin 9 Pump Bias Alarm
This is a TTL logic level alarm, normally at logic "0".
The alarm is raised to logic "1" if any of the pump drive
currents exceed 95% of the pre-set end-of-life value.
Pin 10 Pump Temperature Alarm
This is a TTL logic level alarm, normally at logic "0".
The alarm is raised to logic "1" if any of the pump
submount temperatures are more than 5 degrees away
from the set point (factory default setting). The threshold
levels can be modified by using the ST command.
Pin 11, 23 N/C
No connection.
Pin 13, 14, 15, 16, 17, 25 Ground
Ground Connection should be made to all pins.
Pin 18 RS-232 OUT
Serial data output at TTL levels.
Pin 19 Loss of Input Power Alarm
This is a TTL logic level alarm, normally at logic "0".
The alarm is raised to logic level "1" if the amplifier input
power falls below a user-specified value. The alarm
threshold is set via the LO command.
Pin 20 Output Power Mute
A TTL input signal (normally at logic "0") which is used
to limit the optical output to +7 dBm.
Pin 21 Amplifier Disable
A TTL input signal (normally at logic "0") which is used
to turn off the pump lasers. The temperature control
electronics and all other functions are unaffected. NOTE
THAT UNDER HIGH INPUT POWER CONDITIONS,
CONSIDERABLE OUTPUT POWER CAN STILL EXIST
EVEN WHEN THE AMPLIFIER IS DISABLED. THIS INPUT
MUST NOT BE REGARDED AS AN INTERLOCK
AND THE AMPLIFIER MUST STILL BE CONSIDERED
AS CLASS 3B, IEC.
Pin 22 RS-232 IN
Serial data input at TTL levels.
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Parameter
Min
Typ
Max
Unit
Notes
Operating wavelength
1530
1540
1563
nm
Calibrated to a of 1540 nm
Optical input power
-6
dBm
Optical output power
17
dBm
-6 dBm input power, 1540 nm
Gain
23
dB
1540 nm, 40C
Noise figure maximum
5.5
dB
Over wavelength range, -6 dBm I/P
Backward ASE
-25
dBm
Remnant 980 to output
-30
dBm
Remnant 1480 to input
-30
dBm
Remnant 1480 to output
-30
dBm
Gain flatness
1.0
1.5
dBpk-pk
23 dB gain 1540 nm, 17 dBm O/P, 40C
PDG
0.5
dB
PMD
1.0
ps
Optical power monitor
1.0
2.5
5.0
%
Optical input return loss
40
dB
Amplifier off
Optical output return loss
40
dB
Amplifier off
Gain control ripple
0.5
dB
15 dB
in input power
Power consumption
5
23.5
W
MGMFL-1AEC28 - Full Band Line Amplifier
Parameter
Min
Typ
Max
Unit
Notes
Operating wavelength
1530
1540
1563
nm
Calibrated to a
of 1540 nm
Optical input power
-9
dBm
Optical output power
17.5
dBm
-9 dBm input power, 1540 nm
Gain
26.5
dB
1540 nm, 40C
Noise figure maximum
5.5
dB
Over wavelength range, -9 dBm I/P
Backward ASE
-25
dBm
Remnant 980 to output
-30
dBm
Remnant 1480 to input
-30
dBm
Remnant 1480 to output
-30
dBm
Gain flatness
0.9
1.5
dBpk-pk
26.5 dB gain 1540 nm, 17.5 dBm O/P, 40C
PDG
0.5
dB
PMD
1.0
ps
Optical power monitor
1.0
2.5
5.0
%
Optical input return loss
40
dB
Amplifier off
Optical output return loss
40
dB
Amplifier off
Gain control ripple
0.5
dB
15 dB
in input power
Power consumption
5
23.5
W
MGMFL-1ALC28 - Full Band Line Amplifier
Input port F
Output port E
Monitor port C
Input port F
Output port E
Monitor port C
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