1725-Type Gain Block
Erbium-Doped Fiber Amplifier
Preliminary Data Sheet
February 2003
TriQuint Optoelectronics
Characterized by extremely flat gain over a wide 1.5 m
wavelength range, the 1725-Type Gain Block EDFA features a
number of input and output taps for amplifier and system
diagnostics.
Features
High saturated output power, >14 dBm (upgradable
to 17 dBm and 20 dBm)
Wide operating wavelength range,
1530 nm--1560 nm
Extremely flat gain profile, <1 dB typical
Very low noise figure
Interstage access for system customization
Input and output monitors for easy system diagnosis
Isolated input and output ports
Wide operating temperature range,
5 C to +70 C
Applications
Designed for DWDM applications
In-line DWDM amplifier with interstage access for
dispersion compensating fiber (DCF), or optical add/
drop multiplexers (OADMs)
Bidirectional preamp and booster amplifier
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MIC
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Preliminary Data Sheet
1725-Type Gain Block
February 2003
Erbium-Doped Fiber Amplifier
Description
The TriQuint 1725-type gain block erbium-doped fiber
amplifier (EDFA) is a multistage gain block specifically
designed for use in high-performance DWDM systems.
This design achieves an extremely flat gain profile over
the entire 1530 nm to 1560 nm wavelength range.
Ports are provided for access to the midstage of the
amplifier. The amplifier design can accommodate up to
9 dB of loss through these ports. This midstage access
allows the user to customize the 1725-type amplifier to
meet system needs. Typical uses for this feature
include using dispersion-compensating fiber (DCF) or
optical add/drop multiplexers (OADMs).
Another advanced feature of the 1725-type EDFA is
that the nominal output power of 14 dBm can be
increased by providing additional 1480 nm pump
power. To facilitate this, the 1725 EDFA contains a port
terminated with an SC/APC optical connector to which
an external 1480 nm pump laser module may be con-
nected. This allows the customer the flexibility to
upgrade the output power of the amplifier as system
requirements change.
Input and output tap monitor ports are standard fea-
tures that aid the customer with amplifier and system
diagnostics. All inputs and outputs are isolated to
reduce the effects of reflections on amplifier perfor-
mance.
The device has been qualified for DWDM applications
and meets the intent of Telcordia Technologies
* GR-
1312-CORE.
Pin Information
Table 1. Pin Descriptions
Pin
Description
1
Pump 1 TEC ()
2
Pump 1 TEC ()
3
Pump 1 Laser Cathode
4
Pump 1 Laser Anode
5
Pump 2 TEC (+)
6
Pump 2 TEC (+)
7
Pump 2 Thermistor (+)
8
Pump 2 Thermistor ()
9
Pump 2 Back-facet Monitor Cathode (+)
10
Pump 2 Back-facet Monitor Anode ()
11
EDFA Case
12
NC
13
Pump 1 TEC (+)
14
Pump 1 TEC (+)
15
Pump 1 Thermistor (+)
16
Pump 1 Thermistor ()
17
Pump 1 Back-facet Monitor Cathode (+)
18
Pump 1 Back-facet Monitor Anode ()
19
Pump 2 TEC ()
20
Pump 2 TEC ()
21
Pump 2 Laser Anode
22
Pump 2 Laser Cathode
Figure 1. Block Diagram
* Telcordia Technologies is a trademark of
Telcordia Technologies, Inc.
OPTICAL
GAIN
OPTICAL
INPUT
SIGNAL
PREAMP SECTION
OPTICAL
GAIN
BOOSTER SECTION
INTERSTAGE
(9 dB LOSS)
OPTICAL
OUTPUT
SIGNAL
PORT FOR
ADDITIONAL
PUMP POWER
INPUT
TAP
OUTPUT
TAP
INPUT
TAP
OUTPUT
TAP
OUTPUT
1-1055(F)
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3
1725-Type Gain Block
Preliminary Data Sheet
Erbium-Doped Fiber Amplifier
February 2003
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.
Optical Characteristics
Parameter
Symbol
Min
Max
Unit
Storage Temperature
T
stg
40
85
C
Operating Temperature
T
OP
5
70
C
Bias Current First-stage Pump
I
BS1
--
400
mA
Bias Current Second-stage Pump
I
BS2
--
800
mA
Pump Laser Reverse Voltage
V
R
--
2
V
TEC Current First-stage Pump
I
TECS1
--
1.5
A
TEC Current Second-stage Pump
I
TECS2
--
1.6
A
Monitor Reverse Bias Voltage
V
RMON
--
10
V
Temperature Sensor Current
T
SEN
--
5
mA
Table 2. Performance Specifications
Parameter
Symbol
Conditions
Min
Max
Unit
Wavelength Range
--
1530.3
1560.6
nm
EOL Optical Output Power
P
OUT
P
IN
= 14 dBm
14
--
dBm
Gain Flatness
GF
P
IN
= 14 dBm,
9 dB interstage loss
--
1.5
dB
Noise Figure
NF
P
IN
= 14 dBm
--
6.0
dB
First-stage Pump Bias
I
F1
--
--
330
mA
Second-stage Pump Bias
I
F2
--
--
800
mA
First-stage Pump Forward Voltage
I
VF1
--
--
2.5
V
Second-stage Pump Forward Voltage
I
VF2
--
--
2.5
V
First-stage Pump TEC Current
I
TEC1
Case temperature = 70 C,
bias currents = EOL values
--
1.5
A
Second-stage Pump TEC Current
I
TEC2
Case temperature = 70 C,
bias currents = EOL values
--
1.5
A
First-stage Pump TEC Voltage
V
TEC1
Case temperature = 70 C,
bias currents = EOL values
--
3.0
V
Second-stage Pump TEC Voltage
V
TEC2
Case temperature = 70 C,
bias currents = EOL values
--
4.0
V
First-stage Pump Photodetector Current
I
PD1
--
270
2500
A
Second-stage Pump Photodetector
Current
I
PD2
--
100
2250
A
4
For additional information and latest specifications, see our website: www.triquint.com
Preliminary Data Sheet
1725-Type Gain Block
February 2003
Erbium-Doped Fiber Amplifier
Optical Characteristics
(continued)
Table 3. Performance Specifications (Enhanced 17 dBm Version)
Parameter
Symbol
Conditions
Min
Max
Unit
Wavelength Range
--
1530.3
1560.6
nm
EOL Optical Output Power
P
OUT
P
IN
= 11 dBm
17
--
dBm
Optical Power from External Pump
--
--
--
120
mW
Center Wavelength for External Pump
--
--
1460
1488
nm
Gain Flatness
GF
P
IN
= 11 dBm,
9 dB interstage loss
--
1.5
dB
Noise Figure
NF
P
IN
= 11 dBm
--
6.25
dB
First-stage Pump Bias
I
F1
--
--
330
mA
Second-stage Pump Bias
I
F2
--
--
800
mA
First-stage Pump Forward Voltage
I
VF1
--
--
2.5
V
Second-stage Pump Forward Voltage
I
VF2
--
--
2.5
V
First-stage Pump TEC Current
I
TEC1
Case temperature = 70 C,
bias currents = EOL values
--
1.5
A
Second-stage Pump TEC Current
I
TEC2
Case temperature = 70 C,
bias currents = EOL values
--
1.5
A
First-stage Pump TEC Voltage
V
TEC1
Case temperature = 70 C,
bias currents = EOL values
--
3.0
V
Second-stage Pump TEC Voltage
V
TEC2
Case temperature = 70 C,
bias currents = EOL values
--
4.0
V
First-stage Pump Photodetector Current
I
PD1
--
270
2500
A
Second-stage Pump Photodetector
Current
I
PD2
--
100
2250
A
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5
1725-Type Gain Block
Preliminary Data Sheet
Erbium-Doped Fiber Amplifier
February 2003
Optical Characteristics
(continued)
Table 4. Performance Specifications (Enhanced 20 dBm Version)
Parameter
Symbol
Conditions
Min
Max
Unit
Wavelength Range
--
1530.3
1560.6
nm
EOL Optical Output Power
P
OUT
P
IN
= 8 dBm
20
--
dBm
Optical Power from External Pump
--
--
--
330
mW
Center Wavelength for External Pump
--
--
1460
1488
nm
Gain Flatness
GF
P
IN
= 8 dBm,
9 dB interstage loss
--
1.5
dB
Noise Figure
NF
P
IN
= 8 dBm
--
7.0
dB
First-stage Pump Bias
I
F1
--
--
330
mA
Second-stage Pump Bias
I
F2
--
--
800
mA
First-stage Pump Forward Voltage
I
VF1
--
--
2.5
V
Second-stage Pump Forward Voltage
I
VF2
--
--
2.5
V
First-stage Pump TEC Current
I
TEC1
Case temperature = 70 C,
bias currents = EOL values
--
1.5
A
Second-stage Pump TEC Current
I
TEC2
Case temperature = 70 C,
bias currents = EOL values
--
1.5
A
First-stage Pump TEC Voltage
V
TEC1
Case temperature = 70 C,
bias currents = EOL values
--
3.0
V
Second-stage Pump TEC Voltage
V
TEC2
Case temperature = 70 C,
bias currents = EOL values
4.0
V
First-stage Pump Photodetector Current
I
PD1
--
270
2500
A
Second-stage Pump Photodetector
Current
I
PD2
--
100
2250
A
Table 5. Input/Output Monitor Specifications
Parameter
Min
Max
Unit
Wavelength Range
1530.3
1560.6
nm
First-stage Input Monitoring Loss
11.5
14.5
dB
First-stage Output Monitoring Loss
11.5
14.5
dB
Second-stage Input Monitoring Loss
11.5
14.5
dB
Second-stage Output Monitoring Loss
18.0
22.0
dB
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