Data Sheet, Rev. 6
September 2002
A1612A/B 1310 nm DFB Laser Modules
Description
The A1612A/B 1310 nm forward-path DFB laser
modules are designed for both broadcast and nar-
rowcast analog applications. The highly linear,
OC-48 pinout-compatible devices feature up to
31 mW output power with superior distortion perfor-
mance over an enhanced operating temperature
range of –40 °C to +85 °C.
With up to 31 mW of output power, the A1612A/B
module enables transmission beyond 40 km, and a
greater number of optical splits. In addition, the wide
operating temperature range increases the laser’s
reliability even in the harshest environments.
Features
■
■
■
■
■
OC-48 pinout compatible
Negative bias
112 channel loading
Meets
Telcordia Technologies
™ 468 specifications
High output power, up to 31 mW
Applications
■
1310 nm forward path/return path:
— Long distances
— High-count optical splits
Broadcast and narrowcast networks
■
A1612A/B 1310 nm DFB Laser Modules
Data Sheet, Rev. 6
September 2002
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
Operating Case Temperature Range
Storage Temperature Range
Laser Forward dc Current
Reverse dc Voltage (laser)
Reverse Voltage Photodiode
TEC Current
Symbol
T
C
T
stg
—
V
R
V
RPD
I
TEC
Condition
I
F
= I
OP
—
—
—
—
–40
°C <
T
C
<
+85
°C,
T
OP
= 25 °C,
I
F
= 100 mA
Min
–40
–40
—
—
—
—
Max
85
85
150
3.8
10
1.9
Unit
°C
°C
mA
Vdc
V
A
Electrical/Optical Characteristics
Table 1. Electrical and Optical Characteristics
Parameter
Wavelength
Optical Output Power
Optical Isolation
Side Mode Suppression Ratio
Threshold Current
Operating Current
Monitor PD Current
Thermistor Resistance
Thermistor Temperature Coeffi-
cient
TEC Current
Symbol
λ
OP
P
O
ISO
SMSR
I
TH
I
OP
I
PD
R
TH
TC
TH
I
TEC
Condition
I
F
= I
OP
, T = T
OP
I
F
= I
OP
T
OP
= 25 °C
I
F
= I
OP
25 °C, BOL
BOL
V
RM
= 5 V,
T
OP
= 25 °C
T
OP
= 25 °C
T
OP
= 25 °C
–40
°C <
T
C
<
+85
°C,
T
OP
= 25 °C,
I
F
= 100 mA
Min
—
4
30
30
—
—
10
—
—
—
Typ
1310 ± 10
—
—
—
—
—
—
10 ± 0.5 @ 25 °C
–4.4 @ 25 °C
—
Max
—
31
—
—
30
120
200
—
—
1.9
Unit
nm
mW
dB
dB
mA
mA
µA/mW
kΩ
%/°C
A
Table 2. RF Characteristics
Parameter
Frequency Range
Frequency Response
Symbol
F
|S21|
Condition
—
I
F
= 60 mA,
5 MHz—860 MHz,
T
OP
= 25 °C
—
—
Min
5
—
Typ
—
±0.5
Max
860
—
Unit
MHz
dB
Carrier-to-Noise Ratio*
Composite Second Order:
1612A
1612B
Composite Triple Beat
Relative Intensity Noise
2
CNR
CSO
—
—
—
51
57
60
67
<
–155
—
—
—
—
—
dB
dB
dB
dB
dB/Hz
CTB
RIN
—
—
—
* OMI = 3.2% min, 112 unmodulated NTSC channels.
Agere Systems Inc.
Data Sheet, Rev. 6
September 2002
A1612A/B 1310 nm DFB Laser Modules
Electrical Schematics
1
ISOLATOR
2
NC
14
13
(+)
3
12
(–)
(–)
4
11
(+)
(+)
5
NC
CASE
GROUND
CASE
GROUND
10
(+)
6
9
(–)
7
TEC
8
1-1233F
Figure 1. A1612A/B Laser Schematic
14
NC
13
LASER
COMMON (+)
LASER
MODULATION (–)
LASER
COMMON (+)
THERMISTOR
1
THERMISTOR
dc LASER
BIAS
MPD ANODE
2
39 nH
3
200
Ω
4
1000 pF
SEE
FIGURE 4
3.3
µH
0.01
µF
SEE
FIGURES
3A AND 3B
12
11
10
NC
CASE
GROUND
CASE
GROUND
MPD CATHODE
5
1000 pF
9
TEC (+)
6
0.01
µF
8
TEC (–)
7
0.01
µF
1-1234(F)
Figure 2. A1612A/B Circuit Schematic
Agere Systems Inc..
3
A1612A/B 1310 nm DFB Laser Modules
Data Sheet, Rev. 6
September 2002
Electrical Schematics
(continued)
0.01
µF
C7
3:5
T1*
2
3
SEE PIN 12,
FIGURE 2
0.5 pF—2.5 pF
VSWR
R1
37.5
Ω
SEE PIN 12,
FIGURE 2
R2
37.5
Ω
1-1238F.b
1 pF—
5 pF
FREQUENCY
RESPONSE
*T1 (75
Ω)
3:5.
0.01
µF
0.01
µF
Figure 3B. Resistive-Matched Configuration
1-1238F.a
Figure 3A. Impedance-Matched Configuration
TEC
CONSTANT
ALARM
THERMISTOR
1
THERMISTOR
dc LASER
BIAS
MPD ANODE
2
39 nH
3
200
Ω
4
1000 pF
3.3
µH
0.01
µF
J2
1 THERMISTOR
2 THERMISTOR
3 dc LASER BIAS
4 MPD ANODE
5 MPC CATHODE
6 TEC (+)
7 TEC (–)
8 GND
9 GND
10 GND
MPC CATHODE
5
1000 pF
TEC (+)
6
0.01
µF
TEC (–)
7
0.01
µF
1-1238F.c
Note: When ordering the dc set, the following boards are included: alarm board, 9108-004; TEC board, 9028-004; constant current, 9383-004.
Figure 4. dc Set (Agere Systems-Supplied Option)
4
Agere Systems Inc.
Data Sheet, Rev. 6
September 2002
A1612A/B 1310 nm DFB Laser Modules
Outline Diagram
Dimensions are in inches and (millimeters).
PIN 1
LEADS
0.030 (0.8) WIDE x 0.008 (0.2) THICK
0.120 (3.0) MINIMUM LENGTH
6 SPCS @ 0.100 (2.5)
0.213
(5.4)
LOCATION FOR LABEL
INCLUDING SERIAL NUMBER
AND DATE CODE
(LABEL NOT SHOWN)
0.049
(1.2)
0.500
(12.7)
0.350
(8.9)
0.250
(6.4)
4 x ø 0.105 (2.7)
0.820
(20.8)
1.025
(26.0)
1.180
(30.0)
0.190 ± 0.03
(5.0 ± 0.8)
0.078
(2.0)
0.700 ± 0.03
(18.0 ± 0.8)
0.365
(9.3) 0.215 ± 0.01
(5.5 ± 0.25)
0.040
(1.0)
0.248
(6.3)
1-1179.(F)a
Pin Information
Table 3. Pin Descriptions
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Agere Systems Inc..
Description
Thermistor
Thermistor
dc Laser Bias (–)
MPD Anode
MPD Cathode
Thermoelectric Cooler (+)
Thermoelectric Cooler (–)
Case Ground
Case Ground
NC
Laser Common (+)
Laser Modulation (–)
Laser Common (+)
NC
5
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