TZ7-01-111A (1/6)
May 25, 2001
Approved
Approved
Charged
H.Koyanagi
Specification of uncooled DFB-LD module
Module type: FU-645SDF-x1Mxx
( Mitsubishi standard product )
A
B
C
D
x
Date
Approved
26.May.'01
T.Nambara
MITSUBISHI ELECTRIC CORPORATION
* Mitsubishi Electric Corp. reserves the right to change product design and specification without notice.
TZ7-01-111A (2/6)
MITSUBISHI (OPTICAL DEVICES)
FU-645SDF-x1Mxx
1.55
m UNCOOLED DFB-LD MODULE WITH SINGLEMODE FIBER PIGTAIL
(BIAS CIRCUIT INTEGRATED, DIGITAL APPLICATION)
DESCRIPTION
Module type FU-645SDF-x1Mxx is a 1.55
m
Uncooled DFB-LD module with single-mode optical
fiber.
This module is suitable to a light source for use in
2.5Gb/s digital optical communication systems.
FEATURES
l
/4 shifted Multi quantum wells (MQW) DFB
Laser Diode module
l
Input impedance is 25
l
Emission wavelength is in 1.55
m band
l
High-speed response
l
Built-in optical isolator
l
Built-in thermistor and bias T
l
8-pin Mini-DIL package with Gull wing leads
l
With photodiode for optical output monitor
APPLICATION
High speed transmission systems (~2.5Gb/s)
ABSOLUTE MAXIMUM RATINGS (Tc=25C)
Parameter
Symbol
Conditions
Rating
Unit
Optical output
power
Pf
CW
6
mW
Forward current
If
CW
100
mA
Laser diode
Reverse voltage
Vrl
-
2
V
Reverse voltage
Vrd
-
20
V
Photodiode
Forward current
Ifd
-
2
mA
Operating case temperature
Tc
-
-5 ~ +70
C
Storage temperature
Tstg
-
-40 ~ +85
C
TZ7-01-111A (3/6)
MITSUBISHI (OPTICAL DEVICES)
FU-645SDF-x1Mxx
1.55
m UNCOOLED DFB-LD MODULE WITH SINGLEMODE FIBER PIGTAIL
(BIAS CIRCUIT INTEGRATED, DIGITAL APPLICATION)
ELECTRICAL/OPTICAL CHARACTERISTICS (Tc=-5~70C, unless otherwise noted)
Limits
Parameter
Symbol
Test Conditions
Min.
Typ.
Max.
Unit
CW, Tc=25C
-
10
25
Threshold current
Ith
CW
2
-
40
mA
Optical output power
at threshold current
Pth
CW, Ibias=Ith
-
-
50
W
CW, Pf=2mW, Tc=25C
-
40
70
Operating current
Iop
CW, Pf=2mW, Tc=70C
-
60
90
mA
CW, Pf=2mW, Tc=25C
-
1.2
1.5
Operating voltage
Vop
CW, Pf=2mW, Tc=70C
-
1.6
1.8
V
Input impedance
Zin
-
-
25
-
Optical output power from
fiber end
Pf
CW, nominal
-
2
-
mW
Light-emission central
wavelength
c
CW, Pf=1mW
1530
1550
1570
nm
Wavelength temperature
coefficient
ct
-
-
0.10
0.12
nm/C
Spectral width
(Note1), -20dB
-
-
0.4
nm
Side mode suppression ratio
Sr
(Note1)
30
45
-
dB
Cutoff frequency
(-1.5dB optical)
fc
Pf=1mW
3.5
-
-
GHz
Rise and fall time (10~90%)
tr, tf
(Note1)
-
125
150
psec
Dispersion penalty
Pp
(Note1), +1800ps/nm disp.
-
-
2
dB
Relative intensity noise
Nr
CW, Pf=1mW, f=1GHz
-
-150
-140
dB/Hz
Tracking error (Note 2)
Er
CW, APC(Imon=const.)
-
0.5
1.25
dB
CW, Tc=25C
0.06
-
0.1
Differential efficiency
CW
0.036
-
0.15
mW/
mA
Monitor current
Imon
CW, Pf=1mW, Vrd=5V
0.05
-
1
mA
Optical isolation
Iso
-
20
-
-
dB
Dark current (PD)
Id
Vrd=5V
-
-
0.1
A
Capacitance (PD)
Ct
Vrd=5V, f=1MHz
-
-
10
pF
Thermistor resistance
Rth
Tc=25C
9.5
10
10.5
k
B constant of Rth
B
-
-
3950
-
K
Note 1) 2.48832Gb/s NRZ, 2
23
-1, Pf_ave=1mW, Extinction ratio 10dB, optical return loss from the line should be
greater than 24dB in order to ensure the specified performance.
Note 2) Er=max|10
log(Pf / Pf@25C)|
FIBER PIGTAIL SPECIFICATIONS
Parameter
Limits
Unit
Type
SM
-
Mode field diameter
10
1
m
Cladding diameter
125
2
m
Secondary coating outer diameter
0.9
0.1
mm
Connector
See Table 1.
-
Optical return loss of connector
40 (min)
dB
TZ7-01-111A (4/6)
MITSUBISHI (OPTICAL DEVICES)
FU-645SDF-x1Mxx
1.55
m UNCOOLED DFB-LD MODULE WITH SINGLEMODE FIBER PIGTAIL
(BIAS CIRCUIT INTEGRATED, DIGITAL APPLICATION)
DOCUMENTATION
Threshold current (Ith) at Tc=25, 70C
Operating current (Iop) at Tc=25, 70C
Operating voltage (Vop) at Tc=25C
Light-emission central wavelength (
c) at Tc=25C
Monitor current (Imon) at Tc=25C
Optical output power from fiber end (Pf)
Table 1.
Type number
Connector type
L (Note 3)
FU-645SDF-1M1B
None (Note 4)
-
FU-645PDF-V1M1B
FC/PC
28.4
FU-645PDF-W1M1B
SC/PC
34.5
FU-645SDF-1M2C
None (Note 4)
-
FU-645PDF-V1M2C
FC/PC
28.4
FU-645PDF-W1M2C
SC/PC
34.5
Note 3) `L' is defined in OUTLINE DIAGRAMs.
Note 4) There are some cases where a connector for testing is shipped with the product.
Then the fiber length not including the connector is more than 1000mm.
TZ7-01-111A (5/6)
MITSUBISHI (OPTICAL DEVICES)
FU-645SDF-x1Mxx
1.55
m UNCOOLED DFB-LD MODULE WITH SINGLEMODE FIBER PIGTAIL
(BIAS CIRCUIT INTEGRATED, DIGITAL APPLICATION)
OUTLINE DIAGRAM (1)
(Unit : mm)
FU-645SDF-x1M1B
PIN
FUNCTION
1
THERMISTOR
2
THERMISTER
3
LD BIAS, CATHODE
4
PD CATHODE
5
PD ANODE
6
LD ANODE
7
LD RF, CATHODE
8
LD ANODE
PD
LD
19
Thermistor
4
3
2
1
8
7
6
5
Pin No.
TOP VIEW
PDF 
ZIP