1,550nm DFB DWDM
Direct Modulation Laser
FEATURES
•
•
•
•
•
•
Direct Modulation DFB Laser
Built-in TEC, Thermistor and Monitor PD
14-Pin Butterfly Type Module
Low Residual Chirp
Optimized for 2.5 Gb/s Modulation Rates
Selected wavelengths according to ITU-T grid available
FLD5F6CX-E
APPLICATIONS
This laser is intended for application in 2.5 Gb/s long haul
Dense Wavelength Division Multiplexing (DWDM) systems.
Transmission spans of 100 km (1800ps/nm) are possible.
DESCRIPTION
The FLD5FCX-E is capable of 2.5 Gb/s transmission. It is packaged in a “butterfly” type
module. The module employs a highly stable optical coupling system, coupling the laser
output through a built-in optical isolator into a single mode fiber pigtail. The module also
includes a monitor photodiode, a thermoelectric cooler (TEC) and thermistor. This device is
optimally designed for use in DWDM direct modulation transmission systems. Selected wavelengths
are available to the specified ITU-T grid.
ABSOLUTE MAXIMUM RATINGS (Tc=25°C, unless otherwise specified)
Rating
Parameter
Storage Temperature
Operating Case Temperature
Optical Output Power
Laser Forward Current
Laser Reverse Voltage
Photodiode Forward Current
Photodiode Reverse Voltage
TEC Voltage
TEC Current
Symbol
Tstg
Top
Pf
IF
VR
-
VDR
Vc
Ic
Tth
Tsold
Xop
Xst
Condition
-
-
CW
CW
CW
-
-
Cooling
Heating
Cooling
Heating
ATC Operation
260°C
Top<30°C
Tstg<30°C
Min.
-40
-20
-
-
-
-
-
-
-2.5
-
-0.9
-20
-
-
-
Max.
+70
+65
5
150
2
10
20
+2.5
-
+1.4
-
+65
10
95
95
Unit
°
C
°
C
mW
mA
V
mA
V
V
A
°C
sec
%
%
Thermistor Temperature
Lead Soldering Time
Environmental Operating Humidity
Environmental Storage Humidity
Edition 1.2
July 2004
1
FLD5F6CX-E
Parameter
Laser Set Temperature
Threshold Current
Forward Voltage
Series Resistance
Optical Output Power
Slope Efficiency
Threshold Power
Tracking Error (Note 1)
Monitor Current
Photodiode Dark Current
Photodiode Capacitance
Photodiode Cutoff Frequency
Peak Wavelength
Wavelength Drift
Wavelength Stability with
Case Temperature
Side Mode Suppression
Spectral Width (-20dB)
Rise Time (10%-90%)
Fall Time (10%-90%)
Cutoff Frequency
In-Band Ripple (Window)
RF Return Loss
Optical Isolation
Relative Intensity Noise
Kinks
Pulsation
BER Performance
Power Penalty
Symbol
Tset
Ith
VFDC
Rs
Pf
η
Pth
TE
Im
ID
Ct
fcm
λ
p
-
dλ/dTc
Sr
-
tr
tf
fc
S21
S11
Is
RIN
Kns
-
ER
PP
1,550nm DFB DWDM
Direct Modulation Laser
Limits
Typ.
-
-
1.6
25
-
-
-
-
-
2
-
-
Note (4)
-200
-1
33
-
-
-
4.0
-1.5
8
6
3
25
-
-
-
35
-
0.1
0.1
-
-
-
-
-
35
-
None
None
No Floor
-
-
1.5
dB
+200
+1
-
0.5
0.125
0.125
-
+1.5
-
-
-
-
-140
OPTICAL AND ELECTRICAL CHARACTERISTICS (TL=Tset, Tc=25°C, BOL, unless otherwise specified)
Test Conditions
-
CW
CW, IF=30 mA, pin 12-13
CW, pin 12-13
CW
CW, Pf=2.0mW
IF=Ith, CW
Pf=2.0mW, Tc=-20 to 65°C
CW, Pf=2.0mW, VDR=5V
VDR=5V
VDR=5V, f=1 MHz
VDR=5V, 50Ω load
Note (2)
after 20 years
Tc=-20 to 65°C
Note (2)
Note (2)
Note (2)
Note (2)
Pf=2.0mW, -3 dB
f=50 MHz~3 GHz
f=50 MHz~2 GHz
f=2 GHz~3 GHz
f=3 GHz~5 GHz
Tc=-20 to 65°C
f=2.5 GHz
Pf=2.0 mW, ORL=24 dB
up to 2.4 mW
-
Note (3)
Note (3)
Min.
15
3
-
22
2.0
0.035
-
-0.5
0.10
-
-
100
Max.
35
40
1.75
28
-
-
50
+0.5
1.0
100
10
-
Unit
°C
mA
V
Ω
mW
mW/mA
µW
dB
mA
nA
pF
MHz
nm
pm
pm/°C
dB
nm
nsec
nsec
GHz
dB
dB
dB
dB
dB
dB/Hz
Note 1. TE=10*log{pf(Tcase)/Pf(Tc=25°C)}dB, APC
Note 2. 2.5 Gb/s NRZ, pseudo-random, Pb=0.2mW, Ppeak=2.0mW
Note 3. Bit rate=2.48832 Gb/s, PRBS=2
23
-1, Dispersion=1,800 ps/nm, Ppeak=2.0mW,
Pbias=0.2mW (Extinction ratio=10dB), B.E.R.=1x10
-10
Decision point: Center of Back-to-Back at 10
-9
, Receiver: Eudyna Standard Receiver
Note 4. The selected wavelengths available are listed in Fig. 8
2
1,550nm DFB DWDM
Direct Modulation Laser
Parameter
TEC Current
TEC Voltage
Cooler Power
TEC Resistance
Thermistor Resistance
Thermistor B Constant
Symbol
Ic
Vc
Pc
Rc
Rtr
B
Test Conditions
TL=Tset,
Pf=2mW, Tc=65°C
TL=Tset,
Pf=2mW, Tc=65°C
TL=Tset,
Pf=2mW, Tc=65°C
TL=Tset,
Pf=2mW, Tc=65°C
TL=25°C
-
FLD5F6CX-E
Min.
-
-
-
2.0
9.5
3,270
Limit
Typ.
-
-
-
2.4
10.0
3,450
Max.
1.0
2.4
2.4
3.2
10.5
3,630
Unit
A
V
W
Ω
kΩ
K
TEC AND THERMISTOR CHARACTERISTICS
(TL=Tset, Tc=25°C, BOL, unless otherwise specified)
Fig. 1 Forward Current vs Output Power
Fig. 2 Frequency Response
4
TL = 25°C
Output Power, Pf (mW)
3
Relative Output (dB)
12
9
6
3
0
-3
-6
-9
-12
0
0
0
30
60
90
2
4
6
8
10
Pf=2mW
2
1
Frequency (GHz)
Forward Current, If (mA)
3
FLD5F6CX-E
Fig. 3 RF Return Loss
1,550nm DFB DWDM
Direct Modulation Laser
Fig. 4 Cooler Voltage -Current
3.0
3.0
2.0
Vc
Ic
1.0
0.0
-1.0
80
Cooler Current (A)
Cooler Voltage (V)
20
Return Loss (dB)
10
0
-10
-20
0
2
4
6
8
10
2.0
1.0
0.0
-1.0
0
10
20
30
40
50
60
70
Case Temperature (°C)
Frequency (GHz)
Fig. 5 Spectrum
10
0
Relative Intensity (dB)
Fig. 6 Temperature Dependance of
Wavelength
(ACC Operation)
1554
Wavelength (nm)
1553
1552
1551
1550
10
-10
-20
-30
-40
-50
-60
1545
1550
1555
20
30
40
Wavelength
λ
(nm)
Laser Temperature, TL (°C)
4
1,550nm DFB DWDM
Direct Modulation Laser
Fig. 7 Transmission Characteristics
10
-4
2.48832 Gb/s, NRZ
PRBS=2
23-1
TL=Tset,
Ppeak=2mW,
Pb=0.2mW,
(Rext=10dB)
After
1800ps/nm
Transmission
FLD5F6CX-E
Bit Error Rate
10
-6
10
-8
Back to Back
10
-10
10
-12
-40
-35
-30
-25
Average Received Optical Power (dBm)
Fig. 8 Wavelength Table
Part Number
FLD5F6CX-E62
-E61
-E60
-E59
-E58
-E57
-E56
-E55
-E54
-E53
-E52
-E51
-E50
-E49
-E48
-E47
-E46
-E45
-E44
-E43
-E42
Wavelength (nm)
(TL=Tset)
(in vacuum)
1527.99
1528.77
1529.55
1530.33
1531.12
1531.90
1532.68
1533.47
1534.25
1535.04
1535.82
1536.61
1537.40
1538.19
1538.98
1539.77
1540.56
1541.35
1542.14
1542.94
1543.73
Tolerance (nm)
±0.1
±0.1
±0.1
±0.1
±0.1
±0.1
±0.1
±0.1
±0.1
±0.1
±0.1
±0.1
±0.1
±0.1
±0.1
±0.1
±0.1
±0.1
±0.1
±0.1
±0.1
-E41
-E40
-E39
-E38
-E37
-E36
-E35
-E34
-E33
-E32
-E31
-E30
-E29
-E28
-E27
-E26
-E25
-E24
-E23
-E22
-E21
-E20
-E19
-E18
1544.53
1545.32
1546.12
1546.92
1547.72
1548.51
1549.32
1550.12
1550.92
1551.72
1552.52
1553.33
1554.13
1554.94
1555.75
1556.55
1557.36
1558.17
1558.98
1559.79
1560.61
1561.42
1562.23
1563.05
±0.1
±0.1
±0.1
±0.1
±0.1
±0.1
±0.1
±0.1
±0.1
±0.1
±0.1
±0.1
±0.1
±0.1
±0.1
±0.1
±0.1
±0.1
±0.1
±0.1
±0.1
±0.1
±0.1
±0.1
5
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