Data Sheet, Rev. 1
September 2001
Optical Amplifier Platform, 1724-Type
Erbium-Doped Fiber Amplifier (W Series)
Applications
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Designed specifically for DWDM applications
Booster/power amplifier
Line amplifier
Description
The W1724-Type Erbium-Doped Fiber Amplifier
(EDFA) has been designed for use in DWDM applica-
tions and offers the following performance features:
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Flat gain profile over a wide temperature range
Low noise figure
High output power
Automatic gain lock
Designed for use in DWDM applications, the standard
W1724-Type EDFA incorporates a DB-25 connector and a
microcontroller with TTL compatible alarm monitoring.
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Features
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Gain-flattened spectral response
High saturation output power, > 22 dBm
Low power consumption, < 12 W @ 45 °C
Low noise
Single 5 V operation
Wide input signal bandwidth
Wide operating temperature range, 0
°C
to 65
°C
Optical input and output taps
Isolated input and output
Programmable input and output monitors
Connectorized single-mode fiber pigtail
Standard serial communication channels
The versatile W1724-Type EDFA operates over a
wide temperature range, exhibits extremely low
power dissipation, and offers a variety of alarms and
monitors. Optimum performance and system stability
are supported through the use of optical isolation at
the input and output. Optical input and output are
through single-mode fiber pigtails terminated with
optical connectors.
The EDFA incorporates optical input and output taps
that are monitored via an integral microcontroller.
Significant performance benefits are achieved with
the microcontroller, which stabilizes the temperature
of the pumps and maintains constant gain of the
amplifier.
Contact your Account Manager at Agere Systems
Inc. to discuss electrical or optical connector options
not listed in the Ordering Information section.
Data Sheet, Rev. 1
September 2001
Optical Amplifier Platform, 1724-Type
Erbium-Doped Fiber Amplifier (W Series)
Standard Features
The standard W1724-Type EDFA incorporates the opti-
cal architecture illustrated in Figure 1. The standard
features include:
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TTL-Compatible Alarm Outputs
Loss of Input Power Alarm
If the input power is more than 2 dBm below the mini-
mum P
IN
, the loss of input power alarm (pin 19) will
activate (TTL-logic 1).
Exceptional performance benefits with the integral
microcontroller, which precisely controls the gain to
maintain a flat spectral response over various input
powers.
Single 5 V power supply eliminates the need for dual
voltage source circuits.
DB-25 electrical connector allows for easy electrical
connectivity.
Optical input tap enables input monitoring and con-
trol.
SC/PC optical connector.
Low power dissipation.
Alarms:
— Loss of input power alarm.
— Loss of output power alarm.
— Pump bias alarm (>95% of EOL value).
— Pump temperature alarm (T
L
> 35 °C).
— EDFA temperature alarm (T
C
> 60 °C).
Advanced microprocessor design requires minimal
engineering for a shelf-level product.
Standard mechanical outline includes metric screws
and fiber outputs (using SC/PC optical connectors)
at 180 degrees relative to a DB25 electrical connec-
tor. The standard product does not include a heat
sink.
Loss of Output Power Alarm
If the output power decreases by more than 2 dB from
its beginning-of-life value, the loss of output power
alarm (pin 8) will activate (TTL-logic 1).
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Pumps Temperature Alarm
If the laser temperature for the pump(s) exceeds 35
°C,
the pump temperature alarm (pin 10) will activate (TTL-
logic 1).
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Pumps Bias Alarm
If the bias current for the pump(s) exceeds 95% of its
EOL value, the pump bias alarm (pin 9) will activate
(TTL-logic 1).
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EDFA Temperature Alarm
If the case temperature exceeds 60 °C, then the
EDFA temperature alarm (pin 7) will activate (TTL-
logic 1).
Optional Features
Other feature and package options for the W1724-Type
EDFA include:
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Alternative optical connectors
Integral heat sink
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Agere Systems Inc.
Optical Amplifier Platform, 1724-Type
Erbium-Doped Fiber Amplifier (W Series)
Data Sheet, Rev. 1
September 2001
Block Diagram
OPTICAL
INPUT
SIGNAL
OPTICAL GAIN
OPTICAL
OUTPUT
SIGNAL
INPUT TAP
OUTPUT TAP
PD #1
INPUT POWER
MONITOR
PD #2
OUTPUT POWER
MONITOR
MICROCONTROLLER
Figure 1. W1724-Type EDFA Block Diagram
1-904 (C)
Pin Information
Table 1. Pin Descriptions for a Microcontrolled (Full) Amplifier
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
Description
5.0 V (±0.25 V)
5.0 V (±0.25 V)
5.0 V (±0.25 V)
5.0 V (±0.25 V)
Reserved
1
Reserved
1
EDFA Temperature Alarm
Loss of Output Power Alarm
2
Pumps Bias Alarm
3
Pumps Temperature Alarm
4
EDFA Shutdown Override
5
5.0 V (±0.25 V)
GND
Pin
14
15
16
17
18
19
20
21
22
23
24
25
—
GND
GND
GND
GND
RS-232 OUT (TTL)
Loss of Input Power Alarm
6
Reserved
1
Amplifier Disable Input
7
RS-232 IN (TTL)
Reserved
1
5.0 V (±0.25 V)
GND
—
Description
1. Do not connect to reserved pins.
2. Normal = TTL low, alarm = TTL high if the output power falls 2 dB below the minimum value.
3. Normal = TTL low, alarm = TTL high if pump bias exceeds 95% of its end-of-life value.
4. Normal = TTL low, alarm = TTL high if pump temperature exceeds 35 °C.
5. The EDFA is equipped with an optical transient suppression feature when this pin is tied to GND. The EDFA will turn all pumps off, if the
input power is too low. Tying this pin to 5 V will disable this feature; however, damage to the optical connectors and components may occur if
the amplifier is turned on without the presence of an optical signal.
6. Normal = TTL low, alarm = TTL high if input power is less than 2 dB below minimum P
IN
.
7. Amplifier enable (all pumps are on) = TTL low, amplifier disable (all pumps are off) = TTL high.
Agere Systems Inc.
3
Data Sheet, Rev. 1
September 2001
Optical Amplifier Platform, 1724-Type
Erbium-Doped Fiber Amplifier (W Series)
Absolute Maximum Ratings
Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are abso-
lute stress ratings only. Functional operation of the device is not implied at these or any other conditions in excess
of those given in the operational sections of the data sheet. Exposure to absolute maximum ratings for extended
periods can adversely affect device reliability.
Parameter
Storage Temperature
Operating Case Temperature
Absolute Humidity
Symbol
T
stg
T
C
—
Min
–40
0
—
Typ
20
35
—
Max
70
65
0.024
Unit
°C
°C
lbs. H
2
O/lbs. dry air
Electrical Characteristics
Table 2. Power Supply
Parameter
dc Power Supply Voltage
Power Supply Current
(beginning of life)
Power Supply Current
(end of life)
Electrical Power Consumption
(beginning of life)
Electrical Power Consumption
(end of life)
Symbol
V
PS1
I
PS1
I
PS1
—
—
Min
4.75
—
—
—
—
Typ*
5.0
1.0
—
5.0
—
Max
5.25
—
1.9
—
10.0
Unit
V
A
A
W
W
* Typical operating characteristics: V
PS1
= 5.0 V, T
C
= 35 °C.
Table 3. TTL Inputs/Outputs
Under normal operating conditions, the various alarm outputs will be TTL level low. If the corresponding parameter
is outside a predesignated range, the associated alarms will become TTL level high.
Parameter
Input Voltage:
High
Low
Output Voltage:
High
Low
Input Current:
High
Low
Output Current:
High
Low
Symbol
V
IH
V
IL
V
OH
V
OL
I
IH
I
IL
I
OH
I
OL
Min
2
—
2.4
0
—
—
—
—
Typ
—
—
—
0.1
—
—
—
—
Max
—
0.8
—
0.4
–1
1
–4
20
Unit
V
V
V
V
µA
µA
mA
µA
4
Agere Systems Inc.
Optical Amplifier Platform, 1724-Type
Erbium-Doped Fiber Amplifier (W Series)
Data Sheet, Rev. 1
September 2001
Optical Characteristics
Table 4. Performance Specifications for W Series
Parameter
Signal Wavelength Range:
W1724CDDAD
W1724CBBAD
W1724CBBAH
Gain Flatness:
W1724CDDAD
W1724CBBAD
W1724CBBAH
Intput Power:
W1724CDDAD
W1724CBBAD
W1724CBBAH
Output Power:
W1724CDDAD
W1724CBBAD
W1724CBBAH
Noise Figure:
W1724CDDAD
W1724CBBAD
W1724CBBAH
Optical Isolation
Return Loss
Reverse ASE Power Level
Polarization-mode Dispersion
Polarization-dependent Gain
Symbol
λ
L
1530
1549.32
1549.32
GF
—
—
—
P
IL
–17
–20
–28
P
OUT
8
4.5
4.5
NF
—
—
—
25
—
—
—
—
5.0
—
—
—
—
—
—
—
6.0
5.5
5.5
—
–40
–20
1.0
0.5
dB
dB
dB
dB
dB
dBm
ps
dB
—
—
—
17
17.8
17.8
dBm
dBm
dBm
—
—
—
–8
–8
–16
dBm
dBm
dBm
1.3
—
—
2.0
1.5
1.5
dB
dB
dB
—
—
—
1560
1560.61
1560.61
nm
nm
nm
Min
Typ
Max
Unit
—
RL
P
ASE,R
PMD
PDG
Agere Systems Inc.
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