D2570, D2526G, D2555 Wavelength-Selected
Direct Modulated Isolated DFB Laser Module
Data Sheet, Rev. 3
July 2001
D2526 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 testing
requirements.
Table 1. Electrical Characteristics (at 25 °C laser temperature)
Parameter
Slope Efficiency
Symbol
Test Conditions
Min
Typ
Max
Unit
η
ITH
LF = 2 mW (CW)
0.06
—
0.09
14
0.13
30
mW/mA
mA
V
Threshold Current
Laser Forward Voltage
Laser Submount Temperature
Monitor Reverse-bias Voltage*
Monitor Current
—
VLF
LF = 2 mW (CW)
—
1.3
—
1.8
30
TLASER
VRMON
IRMON
ID
—
20
3
°C
V
—
POL = 1 mW (CW)
IF = 0, VRMON = 5 V
—
5
10
0.1
—
0.3
0.01
25
1.5
0.1
—
mA
µA
Ω
Monitor Dark Current
Input Impedance
ZIN
—
Thermistor Current
Resistance Ratio†
Thermistor Resistance
TEC Current
ITC
—
10
9.1
9.5
—
—
100
9.6
10.5
1.0
2.0
50
µA
—
—
—
—
RTH
ITEC
VTEC
∆T
TL = 25 °C
—
kΩ
A
TL = 25 °C, TC = 70 °C
TL = 25 °C, TC = 70°C
TC = 70 °C
0.6
1.3
—
TEC Voltage
—
V
TEC Capacity
—
°C
* Standard operating condition is 5.0 V reverse bias.
† Ratio of thermistor resistance at 0 °C to thermistor resistance at 50 °C.
Table 2. Optical Characteristics (at 25 °C laser temperature)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Peak Optical Output Power
PPEAK
—
2.0
—
—
—
mW
nm
Center Wavelength
(See Table 10.)
λc
TL = 25 °C
CW wavelength
1528.77
1610.06
Line Width (3 dB full width)
∆λ
Modulated at 2.5 Gbits/s
at rated power
—
2
10
MHz
Side-mode Suppression Ratio
Optical Isolation
SMSR
—
CW
30
30
—
—
—
—
—
—
dB
dB
nm
TC = 0 °C to 70 °C
Wavelength Drift (EOL)
∆λ
Tested over
±0.1
25-year lifetime
Center Wavelength Drift with
Case Temperature
∆λC/∆TC
0 °C ≤ TC ≤ 70 °C
—
—
—
—
0.095
—
1
—
1
pm/°C
nm/°C
dB
Wavelength Temperature Tuning
Coefficient
—
—
—
Tracking Error
TC = –20 °C/25 °C/70 °C
Table 3. Dispersion Performance
Parameter
Test
Symbol
Min
Typ
Max
Unit
Conditions
Dispersion Penalty for Extended Reach
DP
1800 ps/nm
—
—
2.0
dB
4
Agere Systems Inc.
AGERE [ AGERE SYSTEMS ]
