D2570, D2526G, D2555 Wavelength-Selected
Direct Modulated Isolated DFB Laser Module
Data Sheet, Rev. 3
July 2001
D2570 Characteristics
Minimum and maximum values are testing requirements. Typical values are characteristics of the device and are
the result of engineering evaluations. Typical values are for information purposes only and are not part of the test-
ing requirements.
Table 7. Electrical Characteristics (at 25 °C laser temperature)
Parameter
Slope Efficiency
Threshold Current
Laser Forward Voltage
Laser Submount Temperature
Monitor Reverse-bias Voltage*
Monitor Current
Monitor Dark Current
Input Impedance
Thermistor Current
Resistance Ratio
†
Thermistor Resistance
TEC Current
TEC Voltage
TEC Capacity
Symbol
η
I
TH
V
LF
T
LASER
V
RMON
I
RMON
I
D
Z
IN
I
TC
—
R
TH
I
TEC
V
TEC
∆T
Test Conditions
L
F
= 10 mW (CW)
—
L
F
= 10 mW (CW)
—
—
P
OL
= 5 mW (CW)
I
F
= 0, V
RMON
= 5 V
—
—
—
T
L
= 25 °C
T
L
= 25 °C, T
C
= 70 °C
T
L
= 25 °C, T
C
= 70°C
T
C
= 70 °C
Min
0.12
—
—
20
3
0.25
—
—
10
9.1
9.5
—
—
—
Typ
0.15
14
1.3
—
5
0.7
0.01
25
—
—
—
0.6
1.3
—
Max
0.2
25
1.8
30
10
1.25
0.1
—
100
9.6
10.5
1.0
2.0
50
Unit
mW/mA
mA
V
°C
V
mA
µA
Ω
µA
—
kΩ
A
V
°C
* Standard operating condition is 5.0 V reverse bias.
† Ratio of thermistor resistance at 0 °C to thermistor resistance at 50 °C.
Table 8. Optical Characteristics (at 25 °C laser temperature)
Parameter
Peak Optical Output Power
Center Wavelength
(See Table 12.)
Line Width (3 dB full width)
Side-mode Suppression Ratio
Optical Isolation
Wavelength Drift (EOL)
Center Wavelength Drift with
Case Temperature
Wavelength Temperature Tuning
Coefficient
Tracking Error
Table 9. Dispersion Performance
Parameter
Dispersion Penalty for Extended Reach
Symbol
DP
Test
Conditions
1800 ps/nm
Min
—
Typ
—
Max
2.5
Unit
dB
Symbol
P
PEAK
λc
Test Conditions
Min
10
1528.77
—
30
30
—
—
—
—
Typ
—
—
2
—
—
—
—
0.095
—
Max
—
1610.06
10
—
—
±0.1
1
—
1
Unit
mW
nm
MHz
dB
dB
nm
pm/°C
nm/°C
dB
—
T
L
= 25 °C
CW wavelength
∆λ
Modulated at 2.5 Gbits/s
at rated power
SMSR
CW
—
T
C
= 0 °C to 70 °C
∆λ
Tested over
25-year lifetime
∆λ
C
/∆T
C
0 °C
≤
T
C
≤
70 °C
—
—
—
T
C
= –20 °C/25 °C/70 °C
6
6
Agere Systems Inc.