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D2555G37 Datasheet(PDF) 6 Page - Agere Systems

Part # D2555G37
Description  D2570, D2526, D2555 Wavelength-Selected Direct Modulated Isolated DFB Laser Module
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Manufacturer  AGERE [Agere Systems]
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D2555G37 Datasheet(HTML) 6 Page - Agere Systems

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6
Agere Systems Inc.
D2570, D2526G, D2555 Wavelength-Selected
Data Sheet, Rev. 3
Direct Modulated Isolated DFB Laser Module
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.
* Standard operating condition is 5.0 V reverse bias.
† Ratio of thermistor resistance at 0 °C to thermistor resistance at 50 °C.
Table 7. Electrical Characteristics (at 25 °C laser temperature)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Slope Efficiency
η
LF = 10 mW (CW)
0.12
0.15
0.2
mW/mA
Threshold Current
ITH
——
14
25
mA
Laser Forward Voltage
VLF
LF = 10 mW (CW)
1.3
1.8
V
Laser Submount Temperature
TLASER
—20
30
°C
Monitor Reverse-bias Voltage*
VRMON
—3
5
10
V
Monitor Current
IRMON
POL = 5 mW (CW)
0.25
0.7
1.25
mA
Monitor Dark Current
ID
IF = 0, VRMON = 5 V
0.01
0.1
µA
Input Impedance
ZIN
——
25
Thermistor Current
ITC
—10
100
µA
Resistance Ratio
9.1
9.6
Thermistor Resistance
RTH
TL = 25 °C
9.5
10.5
k
TEC Current
ITEC
TL = 25 °C, TC = 70 °C
0.6
1.0
A
TEC Voltage
VTEC
TL = 25 °C, TC = 70°C
1.3
2.0
V
TEC Capacity
∆TTC = 70 °C
50
°C
Table 8. Optical Characteristics (at 25 °C laser temperature)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Peak Optical Output Power
PPEAK
—10
mW
Center Wavelength
(See Table 12.)
λcTL = 25 °C
CW wavelength
1528.77
1610.06
nm
Line Width (3 dB full width)
∆λ
Modulated at 2.5 Gbits/s
at rated power
—2
10
MHz
Side-mode Suppression Ratio
SMSR
CW
30
dB
Optical Isolation
TC = 0 °C to 70 °C
30
dB
Wavelength Drift (EOL)
∆λ
Tested over
25-year lifetime
——
±0.1
nm
Center Wavelength Drift with
Case Temperature
∆λC/∆TC
0 °C
≤ TC ≤ 70 °C
1
pm/°C
Wavelength Temperature Tuning
Coefficient
0.095
nm/°C
Tracking Error
TC = –20 °C/25 °C/70 °C
1
dB
Table 9. Dispersion Performance
Parameter
Symbol
Test
Conditions
Min
Typ
Max
Unit
Dispersion Penalty for Extended Reach
DP
1800 ps/nm
2.5
dB
6


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