MITEL 1A444 Datasheet
PRODUCT INFORMATION
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840nm
1A444
VCSEL Laser Diode
PRODUCT INFORMATION
Datacom, General Purpose
13457.11 1999-04-01
0.6
14
Ø1.5
Ø4.7
3.7
5.4
2.5
0.4
CASE
ANODE
CATHODE
BOTTOM VIEW
TO-46 Package With Lens
All dimensions in mm
Optical and Electrical Characteristics
(25°C Case Temperature)
Thermal Characteristics
Absolute Maximum Ratings
PARAMETER SYMBOL LIMIT
Storage Temperature T
stg
-55 to +1258C
Operating Temperature (derating: Fig.4) Top 0 to +708 C
Electrical Power Dissipation(derating: Fig.4) P
tot
35 mW
Continuous Forward Current (f<10 kHz) I
F
15 mA
Peak Forward Current (duty cycle<50%, f>1 MHz) I
FRM
25 mA
Reverse Voltage V
R
1.5 V
Soldering Temperature (2mm from the case for 10 sec) T
sld
2608C
PARAMETER SYMBOL MIN. TYP. MAX. UNIT
Thermal Resistance- Infinite Heat Sink R
thjc
400 8C/W
Thermal Resistance- No Heat Sink R
thja
700 8C/W
Temp. Coefficient-Wavelength dl/dT
j
0.06 nm/8C
Optical Power - Variation 0 to 708C DP
6
0.7 dB
Threshold Current - Variation 0 to 708C DI
th
6
0.6
mA
This Vertical Cavity SurfaceEmitting Laser is designed for Fibre
Channel, Gigabit Ethernet, ATM and
general applications. It operates in
multiple transverse and single longitudinal mode, ensuring stable coupling of power and low noise.
Note 1: Fiber: 50/125 Graded Index, NA=0.2 or 62.5/125 Graded Index, NA=0.275.
W ARNING: Laser Radiation, a void exposure
to beam. Class 3B laser product, potential
eye hazard. Warning labels in each box.
The chip is isolated from the case.
PARAMETER SYMBOL MIN. TYP. MAX. UNIT TEST CONDITION
Fiber-Coupled Power P
fiber
1.3 mW IF=12mA
(Note 1)
Optical Power
P
o
0.9 1.7 3.0
mW IF=12mA
Slope Efficiency
h
200 mW/A IF=12mA
(dPo/dIF)
Bandwidth f
c
2 GHz IF=12mA
(3dBel)
Peak Wavelength l
p
830 840 860 nm IF=12mA
Spectral Width(FWHM) Dl 0.5 1 nm IF=12mA
Forward Voltage (Fig.5) V
F
1.9 2.2 V IF=12mA
Threshold Current I
th
3.5 6 mA
Relative Intensity Noise RIN -130 dB/Hz IF=12mA, f=1 GHz
INFINITE
HEAT SINK
NO HEAT SINK
FIGURE 5
MAX. ELECTRICAL POWER DISSIPATION
1008C
80
60
4020
0
mW
50
40
30
20
10
0
OPERATING TEMPERATURE
FIGURE 7
r
z = opt.
Øc = 50 µm
z
RELATIVE FIBER-COUPLED POWER
r - RADIAL DISPLACEMENT OF FIBER
50 µm
40
30
2010
0
%
100
80
60
40
20
0
FIGURE 6
r
r = opt.
Øc = 50 µm
z
RELATIVE FIBER-COUPLED POWER
3.5 mm
3.0
2.5
2.01.5
1.0
%
100
80
60
40
20
0
z - AXIAL DISPLACEMENT OF FIBER
If vs Vf
FORWARD VOLTAGE
FORWARD CURRENT
mA
20
10
0
0
1 2
3
V
FIGURE 1
RELATIVE OPTICAL POWER
1008C
80
60
4020
0
%
120
100
80
60
40
20
OPERATING TEMPERATURE
RELATIVE THRESHOLD CURRENT
1008C
80
60
4020
0
%
120
100
80
60
40
20
OPERATING TEMPERATURE
FIGURE 3
RELATIVE OPTICAL POWER
FORWARD CURRENT
20
mA
16
12
84
0
%
100
80
60
40
20
0
Pel vs T
Po vs T
Ith vs T
Po vs If
Pf vs z Alignment Pf vs r Alignment
840
nm
1A444
VCSEL Laser Diode
5.6000
3.3000
Clip for SC-2A
R 1.00
80,000
0.5000
20.8200
10,2500
10.3000
4.9500
0.5000
4.5000
5.0800
3.6450
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