Data Sheet, Rev. 4
June 2001
A1751A DWDM Analog
Forward-Path or Return-Path Laser Modules
Characteristics
(continued)
Table 2. Additional Characteristics
Parameter
Bias Current
1
Threshold Current
Slope Efficiency
2
Monitor Photocurrent
Operating Chip Temperature
3
TEC Current
Symbol
I
B
I
TH
η
I
MON
T
OP
I
TEC
Conditions
BOL
25 °C, BOL
I
P
= I
TH
+ 20 and
I
TH
+ 60
I
OP
= 0 mA, V
RM
= 5 V,
T
OP
= 25 °C
I
F
= I
OP
–40
°C <
T
C
<
85
°C,
T
OP
= 15 °C—35 °C,
I
F
= 60 mA
T
OP
= 15 °C—35 °C over T
C
T
OP
= 25 °C
T
C
I
F
= I
OP
Min
—
—
0.10
10
18
–1.5
Max
120
30
—
200
35
1.5
Unit
mA
mA
mW/mA
µA/mW
°C
A
TEC Voltage
Thermistor Resistance
Optical Return Loss
Side Mode Suppression Ratio
V
TEC
R
TH
RL
SMSR
–2.5
—
40
30
3.8
10.5
—
—
V
kΩ
dB
dB
1. Bias point at which all specifications apply.
2. For 10 mW output power. Minimum slope efficiency is lower for lower-power lasers.
3. Chip temperature at which wavelength specification is met. Operating chip temperature is reported for each laser.
Electrical Schematics
1
ISOLATOR
2
NC
14
13
(+)
3
12
(–)
(–)
4
11
(+)
(+)
5
NC
10
(+)
6
CASE
GROUND
CASE
GROUND
9
(–)
7
TEC
8
1-1233(F)
Figure 1. A1751A Laser Schematic
Agere Systems Inc.
3
AGERE [ AGERE SYSTEMS ]
