Data Sheet
July 1999
Optical Amplifier Platform, 1724-Type
Erbium-Doped Fiber Amplifier (S and V Series)
Designed for use in single-channel or video applications, the
standard 1724-Type EDFA incorporates a DB-25 connector
and a microcontroller with TTL compatible alarm monitoring.
Features
s
High saturation output power, >22 dBm
s
Low power consumption, <12 W @ 45 C
s
Low noise
s
Single 5 V operation
s
Wide input signal bandwidth
s
Wide operating temperature range, 0
C to 65
C
s
Optical input and output taps
s
Isolated input and output
s
Programmable input and output
s
Connectorized single-mode fiber pigtail
s
Standard serial communication channels
Applications
s
Designed for a variety of applications:
-- S Series: single channel
-- V Series: video
s
Booster/power amplifier
s
Line amplifier
s
Preamplifier
Description
The 1724-Type Erbium-Doped Fiber Amplifier
(EDFA) has been designed for use in a variety of
applications and is available in application-specific
versions:
s
S Series for single-channel, preamplifier applica-
tions (see Table 4, page 6, for performance specifi-
cations)
-- High gain
-- Low noise figure
s
V Series for video, analog, or booster applications
(see Table 5, page 6, for performance specifica-
tions)
-- Supports a wide range of output powers
-- Low noise figure
-- Low power dissipation
-- Adjustable output power
2
2
Agere Systems Inc.
Data Sheet
July 1999
Erbium-Doped Fiber Amplifier (S and V Series)
Optical Amplifier Platform, 1724-Type
Description
(continued)
The versatile 1724-Type EDFA operates over a wide
temperature range, exhibits extremely low power dissi-
pation, and offers a variety of alarms and monitors.
Optimum performance and system stability are sup-
ported 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. Sig-
nificant performance benefits are achieved with the
microcontroller, which stabilizes the temperature of the
pumps and maintains constant optical output power.
Contact your Agere Systems Inc. Account Manager to
discuss electrical or optical connector options not listed
in the Ordering Information section.
Standard Features
The standard 1724-Type EDFA incorporates the optical
architecture illustrated in Figure 1. The standard fea-
tures include:
s
Exceptional performance benefits with the integral
microcontroller, which precisely controls the output
power and allows for changes to power settings as
necessary.
s
Single 5 V power supply eliminates the need for dual
voltage source circuits.
s
DB-25 electrical connector allows for easy electrical
connectivity.
s
Optical input tap enables input monitoring and con-
trol.
s
Optical output tap enables precise output monitoring
and control and, when used in conjunction with the
microcontroller, typically provides 0.2 dB of output
power stability over temperature and wavelength.
s
SC/PC optical connector
s
Low power dissipation
s
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)
s
Advanced microprocessor design requires minimal
engineering for a shelf-level product.
s
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.
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).
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).
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).
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).
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 1724-Type
EDFA include:
s
Alternative optical connectors
s
Integral heat sink
Agere Systems Inc.
3
Data Sheet
July 1999
Erbium-Doped Fiber Amplifier (S and V Series)
Optical Amplifier Platform, 1724-Type
Block Diagram
Figure 1. 1724-Type EDFA Block Diagram
Pin Information
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.
Table 1. Pin Descriptions for a Microcontrolled (Full) Amplifier
Pin
Description
Pin
Description
1
5.0 V (0.25 V)
14
GND
2
5.0 V (0.25 V)
15
GND
3
5.0 V (0.25 V)
16
GND
4
5.0 V (0.25 V)
17
GND
5
Reserved
1
18
RS-232 OUT (TTL)
6
Reserved
1
19
Loss of Input Power Alarm
6
7
EDFA Temperature Alarm
20
Reserved
1
8
Loss of Output Power Alarm
2
21
Amplifier Disable Input
7
9
Pumps Bias Alarm
3
22
RS-232 IN (TTL)
10
Pumps Temperature Alarm
4
23
Reserved
1
11
EDFA Shutdown Override
5
24
5.0 V (0.25 V)
12
5.0 V (0.25 V)
25
GND
13
GND
--
--
INPUT TAP
OPTICAL GAIN
OUTPUT TAP
PD #2
OUTPUT POWER
MONITOR
MICROCONTROLLER
PD #1
INPUT POWER
MONITOR
OPTICAL
INPUT
SIGNAL
OPTICAL
OUTPUT
SIGNAL
1-904 (C)
4
Agere Systems Inc.
Data Sheet
July 1999
Erbium-Doped Fiber Amplifier (S and V Series)
Optical Amplifier Platform, 1724-Type
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.
Electrical Characteristics
Table 2. Power Supply
* Typical operating characteristics: V
PS1
= 5.0 V, T
C
= 35 C.
Parameter
Symbol
Min
Typ
Max
Unit
Storage Temperature
T
stg
40
20
70
C
Operating Case Temperature
T
C
0
35
65
C
Absolute Humidity
--
--
--
0.024
lbs. H
2
O/lbs. dry air
Parameter
Symbol
Min
Typ*
Max
Unit
dc Power Supply Voltage
V
PS1
4.75
5.0
5.25
V
Power Supply Current
(beginning of life):
19 dBm
22 dBm
I
PS1
I
PS1
--
--
1.0
2.4
--
--
A
A
Power Supply Current
(end of life):
19 dBm
22 dBm
I
PS1
I
PS1
--
--
--
--
1.9
3.8
A
A
Electrical Power Consumption
(beginning of life):
19 dBm
22 dBm
--
--
--
--
5.0
12.0
--
--
W
W
Electrical Power Consumption
(end of life):
19 dBm
22 dBm
--
--
--
--
--
--
10.0
20.0
W
W
Agere Systems Inc.
5
Data Sheet
July 1999
Erbium-Doped Fiber Amplifier (S and V Series)
Optical Amplifier Platform, 1724-Type
Electrical Characteristics
(continued)
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
Symbol
Min
Typ
Max
Unit
Input Voltage:
High
Low
V
IH
V
IL
2
--
--
--
--
0.8
V
V
Output Voltage:
High
Low
V
OH
V
OL
2.4
0
--
0.1
--
0.4
V
V
Input Current:
High
Low
I
IH
I
IL
--
--
--
--
1
1
A
A
Output Current:
High
Low
I
OH
I
OL
--
--
--
--
4
20
mA
A
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