MITSUBISHI (OPTICAL DEVICES)

FU-68SDF-V810MxxB

1.55

m DFB-LD MODULE WITH SINGLEMODE FIBER PIGTAIL

(WAVELENGTH SELECTED, BIAS CIRCUIT INTEGRATED, DIGITAL APPLICATION)

DESCRIPTION

Mod ule type FU-68SDF-V810MxxB is a 1.55

m DFB-

LD module with single-mode optical fiber.
Th is module is suitable to a directly modulated light
source for use in 2.5Gb/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

Emission wavelength is in 1.55

m band

High-speed response
Built-in optical isolator
Built-in thermal electric cooler
Butterfly package
With photodiode for optical output monitor

APPLICATION
High speed transmission systems (~2.5Gb/s)
Dense-WDM systems

ABSOLUTE MAXIMUM RATINGS (Tld=Tset)

Parameter

Symbol

Conditions

Rating

Unit

Optical output
power

Forward current

150

Laser diode

Reverse voltage

Vrl

Reverse voltage

Vrd

Photodiode

Forward current

Ifd

Cooler current

Ipe

1.3

Thermo-
electric co oler
(Note)

Cooler voltage

Vpe

3.1

Operating case temperature

-20 ~ 70

Storage temperature

Tstg

-40 ~ 85

No te) E ven if the thermo-electric cooler (TEC) is operated within the rated conditions, uncontrolled current loading

or o peration without heatsink may easily damage the module by exceeding the storage temperature range.
Th ermistor resistance sho uld be properly monitored by the feedback circuit during TEC operation to avoid
the catastrophic damage.

MITSUBISHI (OPTICAL DEVICES)

FU-68SDF-V810MxxB

1.55

m DFB-LD MODULE WITH SINGLEMODE 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

Optical output power
at threshold current

Pth

CW, If=Ith

150

Operating current

Iop

CW, Pf=10mW

Operating voltage

Vop

CW, Pf=10mW

1.3

1.8

Input impedance

Zin

Pf=10mW

Light-emission central
wavelength

(Note 1)

(Note 2)

Central wavelength drift with
case temp.

Tc=-20~70

-1

pm/

Laser operating temperature

Tset

Spectral width

(Note 1), -20dB

0.2

0.4

Side mode suppression ratio

(Note 1)

Dispersion penalty

(Note 1), at 10

-10

BER,

+1800ps/nm

Cutoff frequency
(-1.5dB optical)

Pf=10mW

3.5

GHz

Rise and fall time
(10~90%)

tr, tf

(Note 1)

150

psec

Relative intensity noise

CW, Pf=10mW,
0.5~3GHz

-155

-145

dB/Hz

Tracking error
(Note 3)

Tc=-20~70

APC, ATC

0.5

Differential efficiency

CW, Pf=10mW

0.15

0.25

0.35

mW/

Linearity

CW, Pf=1~12mW,
(Note 4)

-20

Monitor current

Imon

CW, Pf=10mW, Vrd=5V

0.2

Tc=25

Optical isolation

Iso

Tc=-20~70

Dark current (PD)

Vrd=5V, Tc=-20~70

0.1

Capacitance (PD)

Vrd=5V, f=1MHz

Note 1) 2.48832Gb/s NRZ, 2

-1, Pf_ave=5mW, Extinction ratio 10dB, optical return loss of the connectors should

be greater than 40dB in order to ensure the specified performance.

Note 2) See Table 1.
Note 3) Er=max|10

log(Pf / Pf@25

C)|

Note 4) Variation of the differential efficiency from the straight line between 1mW and 10mW.

MITSUBISHI (OPTICAL DEVICES)

FU-68SDF-V810MxxB

1.55

m DFB-LD MODULE WITH SINGLEMODE FIBER PIGTAIL

(WAVELENGTH SELECTED, BIAS CIRCUIT INTEGRATED, DIGITAL APPLICATION)

THERMAL CHARACTERISTICS (Tld=Tset, Tc=-20~70

Parameter

Symbol

Test Conditions

Limits

Unit

Min.

Typ.

Max.

Thermistor resistance

Rth

Tld=25

9.5

10.5

B constant of Rth

3950

Cooling capacity

Pf=10mW, Tc=70

Cooler current

Ipe

Pf=10mW, Tc=70

Tld=Tset

0.6

Cooler voltage

Vpe

Pf=10mW, Tc=70

Tld=Tset

1.2

FIBER PIGTAIL SPECIFICATIONS

Parameter

Limits

Unit

Type

Mode field diameter

9.5

Cladding diameter

125

Secondary coating outer diameter

0.9

0.1

Connector

FC/PC

Optical return loss of connector

40 (min)

DOCUMENTATION (Tld=Tset)

Fiber output power vs. Laser forward current at Tld=Tset and Tc=-20,25,70

BER curves at 2.48832Gb/s modulation

Threshold current (Ith)

Laser forward current (Iop) at Pf=10mW

Laser forward voltage (Vop) at Pf=10mW

Laser operating temperature (Tset) at

c (Note 5)

Monitor current (Imon) at Pf=10mW

Thermistor resistance (Rth)

Cooler current (Ipe) at Pf=10mW and Tc=70

Cooler voltage (Vpe) at Pf=10mW and Tc=70

Note 5) 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-68SDF-V810MxxB

1.55

m DFB-LD MODULE WITH SINGLEMODE FIBER PIGTAIL

(WAVELENGTH SELECTED, BIAS CIRCUIT INTEGRATED, DIGITAL APPLICATION)

Table 1.

Type number

c (nm)

Type number

c (nm)

FU-68SDF-810M9B

1529.55

FU-68SDF-810M53B

1546.92

FU-68SDF-810M11B

1530.33

FU-68SDF-810M55B

1547.72

FU-68SDF-810M13B

1531.12

FU-68SDF-810M57B

1548.51

FU-68SDF-810M15B

1531.90

FU-68SDF-810M59B

1549.32

FU-68SDF-810M17B

1532.68

FU-68SDF-810M61B

1550.12

FU-68SDF-810M19B

1533.47

FU-68SDF-810M63B

1550.92

FU-68SDF-810M21B

1534.25

FU-68SDF-810M65B

1551.72

FU-68SDF-810M23B

1535.04

FU-68SDF-810M67B

1552.52

FU-68SDF-810M25B

1535.82

FU-68SDF-810M69B

1553.33

FU-68SDF-810M27B

1536.61

FU-68SDF-810M71B

1554.13

FU-68SDF-810M29B

1537.40

FU-68SDF-810M73B

1554.94

FU-68SDF-810M31B

1538.19

FU-68SDF-810M75B

1555.75

FU-68SDF-810M33B

1538.98

FU-68SDF-810M77B

1556.55

FU-68SDF-810M35B

1539.77

FU-68SDF-810M79B

1557.36

FU-68SDF-810M37B

1540.56

FU-68SDF-810M81B

1558.17

FU-68SDF-810M39B

1541.35

FU-68SDF-810M83B

1558.98

FU-68SDF-810M41B

1542.14

FU-68SDF-810M85B

1559.79

FU-68SDF-810M43B

1542.94

FU-68SDF-810M87B

1560.61

FU-68SDF-810M45B

1543.73

FU-68SDF-810M89B

1561.42

FU-68SDF-810M47B

1544.53

FU-68SDF-810M91B

1562.23

FU-68SDF-810M49B

1545.32

FU-68SDF-810M93B

1563.05

FU-68SDF-810M51B

1546.12

FU-68SDF-810M95B

1563.86

All wavelengths are referred to vacuum.
Tolerance is

0.05nm.

Part Number FU-68SDF-V810MxxB