1
MF444
VCSEL Laser Diode
Description
This Vertical Cavity Surface Emitting Laser is
designed for Fiber Channel, Gigabit Ethernet, ATM
and general applications. It operates in multiple
transverse and single longitudinal mode, ensuring
stable coupling of power and low noise.
DS5474
ISSUE 1
May 2001
Ordering Information
MF444
13457.11 TO-46 Package
MF444 ST
13511.11 ST Housing
MF444 SC
13459.11 SC Housing
MF444 FC
13536.11 FC Housing
Note: Rated Fiber coupled power apply only on the TO-46 package, for
housing options fiber coupled power is typically 10% less
WARNING:
Laser Radiation, avoid exposure to beam. Class 3B laser
product, potential eye hazard. Warning labels in each box.
Optical and Electrical Characteristics - Case Temperature 25C
Parameter
Symbol
Min.
Typ.
Max.
Unit
Test Condition
Fiber-Coupled Power
P
fiber
1.3
mW
I
F
=12mA (Note 1)
Optical Power
P
o
0.9
1.7
3.0
mW
I
F
=12mA
Slope Efficiency
(
dP
o
/dI
F
)
200
mW/A
I
F
=12mA
Bandwidth (3dB
el
)
f
c
1.5
GHz
I
F
=12mA
Peak Wavelength
p
830
840
860
nm
I
F
=12mA
Spectral Width (FWHM)
0.5
1
nm
I
F
=12mA
Forward Voltage
V
F
1.9
2.2
V
I
F
=12mA
Threshold Current
I
th
3.5
6
mA
Relative Intensity Noise
RIN
-130
dB/Hz
I
F
=12mA, f=1 GHz
Note 1: Fiber: 50/125 Graded Index, NA=0.2 or 62.5/125 Graded Index, NA=0.275
TO-46 Package with Lens
All dimensions in mm
The chip is isolated from the case
5.4
2.5
CASE
CATHODE
ANODE
BOTTOM VIEW
0.6
14
1.5
4.7
3.7
0.4
MF444
2
Absolute Maximum Ratings
Thermal Characteristics
Parameter
Symbol
Limit
Storage Temperature
T
stg
-55 to +125C
Operating Temperature
T
op
0 to +70C
Electrical Power Dissipation
P
tot
35 mW
Continuous Forward Current (f<1- kHz)
I
F
15 mA
Peak Forward Current (duty cycle<50%, f>1 MHz)
I
FRM
25 mA
Reverse Voltage
V
R
1.5V
Soldering Temperature (2mm from the case for 10 sec)
T
sld
260C
Parameter
Symbol
Min.
Typ.
Max.
Unit
Thermal Resistance - Infinite Heat Sink
R
thjc
400
C/W
Thermal Reistance - No Heat Sink
R
thja
700
C/W
Temp. Coefficient - Wavelength
d
/dT
j
0.06
nm/C
Optical Power - Variation 0 to 70C
P
0.7
dB
Threshold Current - Variation 0 to 70C
I
th
0.6
mA
RELA
TIVE
O
PTI
C
AL P
O
WE
R
100
8
C
80
60
40
20
0
%
120
100
80
60
40
20
OPERATING TEMPERATURE
Figure 1
RELA
TIVE THRE
S
H
O
LD
CU
RRENT
100
8
C
80
60
40
20
0
%
120
100
80
60
40
20
OPERATING TEMPERATURE
Figure 2
RELA
TIVE
O
PTI
C
AL P
O
WE
R
FORWARD CURRENT
20
mA
16
12
8
4
0
%
100
80
60
40
20
0
Figure 3
FORWARD VOLTAGE
F
O
RWARD
CU
RRENT
mA
20
10
0
0
1
2
3
V
Figure 4
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