A1112 High-Power 1550 nm DFB Source Lasers
Data Sheet
January 2001
Features
s
High fiber-coupled power, 30 mW and 40 mW
s
Narrow linewidth, <3 MHz
s
Low relative intensity noise, < 162 dB/Hz
s
Coupled to polarization-preserving (PANDA-type
fiber)
Applications
s
Externally modulated CATV transmitters
s
Externally modulated analog and digital communi-
cation links
Description
The A1112 1550 nm DFB laser modules are high-
power devices in a 14-pin butterfly package with a
thermoelectric cooler and monitor photodiode. The
lasers are designed to be used in conjunction with
commercially available external modulators for high-
performance analog and digital applications. Agere
Systems Inc. offers modules with 30 mW or 40 mW
output power coupled into polarization-preserving
fiber. The A1112 operates with positive or negative
bias.
2
Agere Systems Inc.
Data Sheet
A1112 High-Power 1550 nm DFB Source Lasers
January 2001
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/Optical Characteristics
Parameter
Symbol
Min
Max
Unit
Operating Case Temperature Range
T
C
20
65
C
Storage Temperature Range
Tstg
40
70
C
Forward Current (Laser)
A1112PB, A1112NB
A1112PC, A1112NC
I
F
--
--
275
400
mA
mA
Reverse Voltage (Laser)
V
R
--
2.0
V
Photodiode Reverse Voltage
V
RPD
--
10
V
TEC Voltage
V
TEC
--
2.0
V
TEC Current
Cooling
Heating
I
TEC
--
--
1.8
1.5
A
A
Table 1. Optical Characteristics (25 C Case Temperature)
Parameter
Symbol
Conditions
Min
Max
Unit
Optical Output Power
A1112PB, A1112NB
A1112PC, A1112NC
P
O
--
--
30
40
--
--
mW
mW
Center Wavelength
C
I
OP
1540
1560
nm
Linewidth (FWHM)
V
I
OP
--
3
MHz
Side Mode Suppression Ratio
SMSR
I
OP
30
--
dB
Relative Intensity Noise
RIN
l
OP
,
40 MHz to 860 MHz
--
162
dBc/Hz
Operating Current
I
OP
--
--
250/350
mA
Threshold Current
I
TH
--
--
35/40
mA
Forward Voltage
V
F
--
--
2.5/3.0
V
Optical Isolation
--
20 C to +65C
30
--
dB
Polarization Extinction Ratio
T
E
/T
M
From fiber end, I
OP
20
--
dB
Reverse
Voltage V
R
--
--
2.0
V
Table 2. Electrical Characteristics
Parameter
Symbol
Condition
Min
Max
Unit
Monitor Photodiode Reverse Voltage
V
RMPD
Iop
--
10 V
Monitor Photodiode Current
I
MPD
--
40
2000
A
TEC Current
I
TEC
T = 40 C
--
1.8
A
TEC Voltage
V
TEC
T = 40 C
--
2.2
V
Thermistor Resistance
R
TH
25
C
9.0
11.0
k
3
Agere Systems Inc.
Data Sheet
January 2001
A1112 High-Power 1550 nm DFB Source Lasers
Electrical/Optical Characterisitics
(continued)
Figure 1. A1112 Laser Positive Bias Ciicuit Schematic
Figure 2. A1112 Laser Negative Bias Ciicuit Schematic
TEC
NC
1
2
3
4
5
6
7
14
13
12
11
10
9
8
CASE
GROUND
(+)
()
NC
CASE
GROUND
NC
CASE
GROUND
TEC
NC
1
2
3
4
5
6
7
14
13
12
11
10
9
8
CASE
GROUND
(+)
()
CASE
GROUND
NC
CASE
GROUND
CASE
GROUND
NC
1-1232(F)
1-1232(F).a
4
Agere Systems Inc.
Data Sheet
A1112 High-Power 1550 nm DFB Source Lasers
January 2001
Outline Diagram
Dimensions are in inches and (millimeters).
Pin Information
Table 3. Pin Descriptions
Pin
No.
A1112
(Positive Bias)
A1112
(Negative Bias)
Pin
No
A1112
(Positive Bias)
A1112
(Negative Bias)
1
TE Cooler (+)
TE Cooler (+)
8
Photodiode Anode Photodiode Anode
2
NC
NC
9
Laser Anode
Laser Cathode
3
Case Ground
Case Ground
10
Case Ground
Case Ground
4
NC
Laser Cathode
11
Thermistor
Thermistor
5
Laser Cathode, Case Ground
Laser Anode, Case Ground
12
Case Ground
Case Ground
6
Laser Anode
NC
13
NC
NC
7
Photodiode Cathode
Photodiode Cathode
14
TE Cooler ()
TE Cooler ()
14 13 12 11 10
9
8
1
2
3
4
5
6
7
4X 0.105
(2.67)
0.700 (17.78)
1.180 (29.97)
0.350
(8.89)
0.500
(12.70)
0.600
(15.24)
0.050
(1.27)
0.030
(0.76)
0.100
2.54
0.290
(7.37)
0.060
(1.52)
0.240
(6.09)
0.390
(9.91)
0.360
(9.14)
0.255
(6.48)
0.820 (20.83)
1.025 (26.04)
1-1177(F)
5
Agere Systems Inc.
Data Sheet
January 2001
A1112 High-Power 1550 nm DFB Source Lasers
Laser Safety Information
Class IIIb Laser Product
FDA/CDRH Class IIIb laser product. All versions are Class IIIb laser products per CDRH, 21 CFR 1040 Laser
Safety requirements. All versions are Class 3B laser products per
IEC
1
60825-1:1993. The device has been classi-
fied with the FDA under an accession number to be determined.
This product complies with 21 CFR 1040.10 and 1040.11.
Fujikura
2
PANDA single-mode fiber pigtail, 1 m--2 m; FC/APC connector, nonaligned
Wavelength = 1.5
m
Maximum power = 60 mW
Because of size constraints, laser safety labeling (including an FDA Class IIIb label) is not affixed to the module but
attached to the outside of the shipping carton.
Product is not shipped with power supply.
Caution: Use of controls, adjustments, and procedures other than those specified herein may result in
hazardous laser radiation exposure.
1.
IEC
is a registered trademark of The International Electrotechnical Commission.
2.
Fujikura
is a registered trademark of Fujikura LTD.
DANGER
INVISIBLE LASER RADIATION
IS EMITTED FROM THE END
OF FIBER OR CONNECTOR
Avoid direct exposure to beam
Do not view beam directly with
optical instruments
INVISIBLE LASER RADIATION EMITTED FROM END OF FIBER OR CONNECTOR
Avoid exposure to beam
Class 3B Laser Product IEC-60825M 1993 Max. Output: 60 mW
Wavelength: 1.5
m
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