MITSUBISHI (OPTICAL DEVICES)
FU-68PDF-V520MxxB
1.55
m
m DFB-LD MODULE WITH POLARIZATION MAINTAINING FIBER PIGTAIL
(WAVELENGTH SELECTED, BIAS CIRCUIT INTEGRATED, DIGITAL APPLICATION)
DESCRIPTION
Mod ule type FU-68PDF-V520MxxB is a 1.55
m
m DFB-
LD module with polarization maintaining optical fiber.
Th is module is suitable to a CW light source for
external modulator for use in 2.5Gb/s and 10Gb/s
digital optical communication systems.
Th is module is pre pared in accordance with ITU-T
reco mmend ation wavelength channel plan for Dense-
WDM transmission.
FEATURES
Multi qu antum wells (MQW) DFB Laser Diode
module
Input impedance is 25
W
Emission wavelength is in 1.55
m
m band
Polarization maintaining optical fiber pig-tail
Built-in optical isolator
Built-in thermal electric cooler
Butterfly package
With photodiode for optical output monitor
APPLICATION
High speed transmission systems (~10Gb/s)
Dense-WDM systems
ABSOLUTE MAXIMUM RATINGS (Tld=Tset)
Parameter
Symbol
Conditions
Rating
Unit
Optical output
power
Pf
CW
24
mW
Forward current
If
CW
150
mA
Laser diode
Reverse voltage
Vrl
2
V
Reverse voltage
Vrd
20
V
Photodiode
Forward current
Ifd
2
mA
Cooler current
Ipe
1.3
A
Thermo-
electric co oler
(Note)
Cooler voltage
Vpe
3.1
V
Operating case temperature
Tc
-20 ~ 70
C
Storage temperature
Tstg
-40 ~ 85
C
Note) Even if the thermo-electric cooler (TEC) is operated within the rated conditions, uncontrolled current loading
or operation without heatsink may easily damage the module by exceeding the storage temperature range.
Thermistor resistance should be properly monitored by the feedback circuit during TEC operation to avoid
the catastrophic damage.
MITSUBISHI (OPTICAL DEVICES)
FU-68PDF-V520MxxB
1.55
m
m DFB-LD MODULE WITH POLARIZATION MAINTAINING FIBER PIGTAIL
(WAVELENGTH SELECTED, BIAS CIRCUIT INTEGRATED, DIGITAL APPLICATION)
ELECTRICAL/OPTICAL CHARACTERISTICS (Tld=Tset, Tc=25
C unless otherwise noted)
Parameter
Symbol
Test Conditions
Limits
Unit
Min.
Typ.
Max.
Threshold current
Ith
CW
-
10
25
mA
Operating current
Iop
CW, Pf=20mW
-
-
130
mA
Operating voltage
Vop
CW, Pf=20mW
-
-
2
V
Input impedance
Zin
Pf=20mW
-
25
-
W
Light-emission central
wavelength
l
c
CW, Pf=20mW
(Note 1)
nm
Central wavelength drift with
case temp.
Dl
c/
D
Tc
Tc=-20~70
C
-1
-
0
pm/
C
Laser operating temperature
Tset
-
15
-
35
C
Spectral line width
D
f
CW, Pf=20mW
-
-
20
MHz
Side mode suppression ratio
Sr
CW, Pf=20mW
33
40
-
dB
Cutoff frequency
(-1.5dB optical)
fc
Pf=20mW
2
-
-
GHz
Polarization extinction ratio
Ex
CW, Pf=20mW
20
25
-
dB
Relative intensity noise
Nr
CW, Pf=20mW,
0.5~3GHz
-
-155
-145
dB/Hz
Tracking error
(Note 2)
Er
Tc=-20~70
C,
APC, ATC
-
-
0.5
dB
Differential efficiency
h
CW, Pf=20mW
0.15
-
-
mW/
mA
Monitor current
Imon
CW, Pf=20mW, Vrd=5V
0.2
-
4
mA
Tc=25
C
35
-
-
Optical isolation
Iso
Tc=-20~70
C
23
-
-
dB
Dark current (PD)
Id
Vrd=5V, Tc=-20~70
C
-
-
0.1
m
A
Capacitance (PD)
Ct
Vrd=5V, f=1MHz
-
-
10
pF
Note 1) See Table 1.
Note 2) Er=max|10
log(Pf / Pf@25
C)|
MITSUBISHI (OPTICAL DEVICES)
FU-68PDF-V520MxxB
1.55
m
m DFB-LD MODULE WITH POLARIZATION MAINTAINING FIBER PIGTAIL
(WAVELENGTH SELECTED, BIAS CIRCUIT INTEGRATED, DIGITAL APPLICATION)
THERMAL CHARACTERISTICS (Tld=Tset, Tc=-20~70
C)
Parameter
Symbol
Test Conditions
Limits
Unit
Min.
Typ.
Max.
Thermistor resistance
Rth
Tld=25
9.5
10
10.5
k
W
B constant of Rth
B
-
-
3950
-
K
Cooling capacity
D
T
Pf=20mW, Tc=70
C
55
-
-
C
Pf=20mW, Tc=65
C,
Tld=Tset
-
0.7
1
A
Cooler current
Ipe
Pf=20mW, Tc=70
C,
Tld=Tset
-
0.9
1.2
A
Pf=20mW, Tc=65
C,
Tld=Tset
-
1.4
2.3
V
Cooler voltage
Vpe
Pf=20mW, Tc=70
C,
Tld=Tset
-
2
2.6
V
FIBER PIGTAIL SPECIFICATIONS
Parameter
Limits
Unit
Type
PM (Note 3)
-
Mode field diameter
11
1
m
m
Cladding diameter
125
3
m
m
Secondary coating outer diameter
0.9
0.1
mm
Polarization axis
slow axis
-
Connector
FC/PC
-
Optical return loss of connector
40 (min)
dB
Note 3) PMF - Sumitomo Panda fiber (PM-155)
DOCUMENTATION (Tld=Tset)
Fiber output power vs. Laser forward current at Tld=Tset and Tc=-20,25,70
C
Threshold current (Ith)
Laser forward current (Iop) at Pf=20mW
Laser forward voltage (Vop) at Pf=20mW
Laser operating temperature (Tset) at
l
c (Note 4)
Monitor current (Imon) at Pf=20mW
Thermistor resistance (Rth)
Cooler current (Ipe) at Pf=20mW and Tc=70
C
Cooler voltage (Vpe) at Pf=20mW and Tc=70
C
Note 4) Tset is attached as a reference data. Rth should be used in order to tune the wavelength to the specified
value accurately.
MITSUBISHI (OPTICAL DEVICES)
FU-68PDF-V520MxxB
1.55
m
m DFB-LD MODULE WITH POLARIZATION MAINTAINING FIBER PIGTAIL
(WAVELENGTH SELECTED, BIAS CIRCUIT INTEGRATED, DIGITAL APPLICATION)
Table 1.
Type number
l
c (nm)
Type number
l
c (nm)
Type number
l
c (nm)
FU-68PDF-520M9B
1529.55
FU-68PDF-520M39B
1541.35
FU-68PDF-520M69B
1553.33
FU-68PDF-520M10B
1529.94
FU-68PDF-520M40B
1541.75
FU-68PDF-520M70B
1553.73
FU-68PDF-520M11B
1530.33
FU-68PDF-520M41B
1542.14
FU-68PDF-520M71B
1554.13
FU-68PDF-520M12B
1530.72
FU-68PDF-520M42B
1542.54
FU-68PDF-520M72B
1554.54
FU-68PDF-520M13B
1531.12
FU-68PDF-520M43B
1542.94
FU-68PDF-520M73B
1554.94
FU-68PDF-520M14B
1531.51
FU-68PDF-520M44B
1543.33
FU-68PDF-520M74B
1555.34
FU-68PDF-520M15B
1531.90
FU-68PDF-520M45B
1543.73
FU-68PDF-520M75B
1555.75
FU-68PDF-520M16B
1532.29
FU-68PDF-520M46B
1544.13
FU-68PDF-520M76B
1556.15
FU-68PDF-520M17B
1532.68
FU-68PDF-520M47B
1544.53
FU-68PDF-520M77B
1556.55
FU-68PDF-520M18B
1533.07
FU-68PDF-520M48B
1544.92
FU-68PDF-520M78B
1556.96
FU-68PDF-520M19B
1533.47
FU-68PDF-520M49B
1545.32
FU-68PDF-520M79B
1557.36
FU-68PDF-520M20B
1533.86
FU-68PDF-520M50B
1545.72
FU-68PDF-520M80B
1557.77
FU-68PDF-520M21B
1534.25
FU-68PDF-520M51B
1546.12
FU-68PDF-520M81B
1558.17
FU-68PDF-520M22B
1534.64
FU-68PDF-520M52B
1546.52
FU-68PDF-520M82B
1558.58
FU-68PDF-520M23B
1535.04
FU-68PDF-520M53B
1546.92
FU-68PDF-520M83B
1558.98
FU-68PDF-520M24B
1535.43
FU-68PDF-520M54B
1547.32
FU-68PDF-520M84B
1559.39
FU-68PDF-520M25B
1535.82
FU-68PDF-520M55B
1547.72
FU-68PDF-520M85B
1559.79
FU-68PDF-520M26B
1536.22
FU-68PDF-520M56B
1548.11
FU-68PDF-520M86B
1560.20
FU-68PDF-520M27B
1536.61
FU-68PDF-520M57B
1548.51
FU-68PDF-520M87B
1560.61
FU-68PDF-520M28B
1537.00
FU-68PDF-520M58B
1548.91
FU-68PDF-520M88B
1561.01
FU-68PDF-520M29B
1537.40
FU-68PDF-520M59B
1549.32
FU-68PDF-520M89B
1561.42
FU-68PDF-520M30B
1537.79
FU-68PDF-520M60B
1549.72
FU-68PDF-520M90B
1561.83
FU-68PDF-520M31B
1538.19
FU-68PDF-520M61B
1550.12
FU-68PDF-520M91B
1562.23
FU-68PDF-520M32B
1538.58
FU-68PDF-520M62B
1550.52
FU-68PDF-520M92B
1562.64
FU-68PDF-520M33B
1538.98
FU-68PDF-520M63B
1550.92
FU-68PDF-520M93B
1563.05
FU-68PDF-520M34B
1539.37
FU-68PDF-520M64B
1551.32
FU-68PDF-520M94B
1563.45
FU-68PDF-520M35B
1539.77
FU-68PDF-520M65B
1551.72
FU-68PDF-520M95B
1563.86
FU-68PDF-520M36B
1540.16
FU-68PDF-520M66B
1552.12
FU-68PDF-520M96B
1564.27
FU-68PDF-520M37B
1540.56
FU-68PDF-520M67B
1552.52
FU-68PDF-520M97B
1564.68
FU-68PDF-520M38B
1540.95
FU-68PDF-520M68B
1552.93
All wavelengths are referred to vacuum.
Tolerance is
l
c
0.05nm.
MITSUBISHI (OPTICAL DEVICES)
FU-68PDF-V520MxxB
1.55
m
m DFB-LD MODULE WITH POLARIZATION MAINTAINING FIBER PIGTAIL
(WAVELENGTH SELECTED, BIAS CIRCUIT INTEGRATED, DIGITAL APPLICATION)
OUTLINE DIAGRAM
(Unit : mm)
FU-68PDF-V520MxxB
28.4
PDF 
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