
PRODUCT INFORMATION
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Fax (46) 8 58 02 01 10
Tel (44) 1291 436180
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Asia:
Tel (65) 293 5312
Fax (65) 293 8527
840nm
1A448
VCSEL Laser Diode
PRODUCT INFORMATION
Datacom
13534.11 & 12 1999-04-01
0.6
14
1.5
4.7
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
Tstg
-55 to +125 C
Operating Temperature (derating: Fig.4)
Top
0 to + 70 C
Electrical Power Dissipation (derating: Fig.4)
Ptot
35 mW
Continuous Forward Current (f 10 kHz)
IF
15 mA
Peak Forward Current (duty cycle 50%, f 1 MHz)
IFRM
25 mA
Reverse Voltage
VR
1.5 V
Soldering Temperature (2mm from the case for 10 sec)
Tsld
260 C
PARAMETER
SYMBOL
MIN.
TYP.
MAX.
UNIT
Thermal Resistance - Infinite Heat Sink
Rthjc
400
C/W
Thermal Resistance - No Heat Sink
Rthja
700
C/W
Temp. Coefficient -Wavelength
d /dTj
0.06
nm/ C
Optical Power - Variation 0 to 70 C
P
0.7
dB
Threshold Current - Variation 0 to 70 C
Ith
0.6
mA
This Vertical Cavity Surface-
Emitting Laser is designed for Fibre
Channel, Gigabit Ethernet and ATM
applications. For eye safety, the opti-
cal power is attenuated to comply
with IEC Laser Class 1 requirements.
Note 1: Fiber: 50/125 Graded Index, NA=0.2 or 62.5/125 Graded Index, NA=0.275.
Note 2: Complies with laser Class 1 when operated at max 12 mA; Class 3 above 12 mA.
Class 1 Laser Product
The chip is isolated from the case.
PARAMETER
SYMBOL
MIN.
TYP.
MAX.
UNIT
TEST CONDITION
Fiber-Coupled Power
1A448
Pfiber 100
W
IF=12mA (Note 1)
1A448A
160
Optical Power
Po
400
W
IF=12mA (Note 2)
Slope Efficiency
50
mW/A IF=12mA
(dPo/dIF)
Bandwidth
fc
2
GHz
IF=12mA
(3dBel)
Peak Wavelength
p
830
840
860
nm
IF=12mA
Spectral Width (FWHM)
0.5
1
nm
IF=12mA
Forward Voltage (Fig.5)
VF
1.9
2.2
V
IF=12mA
Threshold Current
Ith
3.5
6
mA
Relative Intensity Noise
RIN
-130
dB/Hz IF=12mA, f=1 GHz