PPRROODDUUCCTT IINNFFOORRMMAATTIIOONN
2B454
Datacom
840nm
VCSEL Laser Diode
This Vertical Cavity Surface-
Emitting Laser is designed for Fibre
Channel, Gigabit Ethernet, ATM and
general applications. It incorporates a
photodiode to monitor the optical
power and allow for feedback control.
For eye safety, the optical power is
attenuated to comply with IEC Laser
Class 1 requirements.
Optical and Electrical Characteristics (25° C Case Temperature)
PARAMETER
SYMBOL MIN. TYP. MAX. UNIT TEST CONDITION
W
W
Fiber-Coupled Power
P
100
IF=12mA (Note 1)
fiber
(Note 2)
Optical Power
P
400
IF=12mA
o
Slope Efficiency
50
2
mW/A IF=12mA
GHz IF=12mA
(dP /dI )
o
F
Bandwidth
f
c
(3dB
el
)
Peak Wavelength
830 840 860 nm IF=12mA
0.5 nm IF=12mA
1.9 2.2
p
Spectral Width (FWHM)
Forward Voltage (Fig.5)
Threshold Current
⌬
1
VF
Ith
V
IF=12mA
3.5
6
mA
Monitor Current
Im
30 100
A IF=12mA, VR>1V
nA VR=5V
Monitor Dark Current
Relative Intensity Noise
Id
30
RIN
-130
dB/Hz IF=12mA, f=1 GHz
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.
Absolute Maximum Ratings
PARAMETER
Ø4.7
Ø1.5
SYMBOL
LIMIT
0.6
Storage Temperature
T
-55 to +125ЊC
stg
3.7
Operating Temperature (derating: Fig.4)
Electrical Power Dissipation (derating: Fig.4)
Continuous Forward Current (fр10 kHz)
Peak Forward Current (duty cycleр50%, fу1 MHz)
VCSEL Reverse Voltage
Top
0 to +70ЊC
35 mW
15 mA
25 mA
1.5 V
P
14
tot
IF
IFRM
VR
0.4
VCSEL Cathode
MONITOR Anode
MONITOR
Cathode
VCSEL
Anode
Soldering Temperature (2mm from the case for 10 sec)
T
260ЊC
sld
2.5
5.47
Thermal Characteristics
PARAMETER
CASE NOT CONNECTED
SYMBOL MIN.
TYP.
MAX.
UNIT
BOTTOM VIEW
Thermal Resistance -Infinite Heat Sink
R
R
500
ЊC/W
TO-46 Package With Lens
thjc
thja
Thermal Resistance -No Heat Sink
Temp. Coefficient -Wavelength
800
ЊC/W
nm/ЊC
dB
d/dT
0.06
j
Class 1 Laser Product
Optical Power - Variation 0 to 70ЊC
⌬P
Ϯ
Ϯ
0.7
0.6
Threshold Current - Variation 0 to 70ЊC
⌬I
mA
th
13589.11 1999-04-01
America: Tel 1-800-96MITEL Fax (613) 592-6909
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Tel (44) 1291 436180 Fax (44) 1291 436771