PRODUCT INFORMATION
840
nm
2B455
VCSEL Laser Diode
Datacom
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.
Optical and Electrical Characteristics
PARAMETER
SYMBOL
MIN.
TYP
.
MAX.
UNIT
(25°C Case Temperature)
TEST CONDITION
Fiber-Coupled Power
Optical Power
Slope Efficiency
(dPo/dI
F
)
P
fiber
P
o
1.3
0.9
1.7
200
15
3.0
mW
mW
I
F
=12mA
I
F
=12mA
(Note 1)
mW/A
I
F
=12mA
deg
GHz
860
1
2.2
6
nm
nm
V
mA
A
30
nA
I
F
=12mA,
V
R
>1V
V
R
=5V
Full Width at 1/e
2
I
F
=12mA
I
F
=12mA
I
F
=12mA
I
F
=12mA
Beam Divergence
Bandwidth
(3dBel )
f
c
p
2
830
840
0.5
Peak Wavelength
Spectral Width
(FWHM)
Forward Voltage
(Fig.5)
Threshold Current
Monitor Current
Monitor Dark Current
Relative Intensity Noise
V
F
I
th
I
m
I
d
RIN
20
1.9
3.5
30
-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. An external glass
ball lens with 2 mm diameter is required.
Ø4.7
Ø2.55
Absolute Maximum Ratings
PARAMETER
SYMBOL
LIMIT
3.575
Storage Temperature
Operating Temperature
(derating: Fig.4)
14
T
stg
Top
P
tot
I
F
I
FRM
V
R
T
sld
-55 to +125 C
0 to +70 C
35 mW
15 mA
25 mA
1.5 V
260 C
Electrical Power Dissipation
(derating: Fig.4)
0.4
VCSEL
Cathode
MONITOR
Anode
Continuous Forward Current
(f
Peak Forward Current
(duty cycle
All dimensions in mm
10 kHz)
50%, f 1 MHz)
VCSEL
Anode
MONITOR
Cathode
VCSEL Reverse Voltage
Soldering Temperature
(2mm from the case for 10 sec)
2.5
5.47
CASE NOT CONNECTED
BOTTOM VIEW
Thermal Characteristics
PARAMETER
SYMBOL
MIN.
TYP.
MAX.
UNIT
TO-46 Package With Flat Window
Thermal Resistance - Infinite Heat Sink
WARNING: Laser Radiation, avoid exposure
to beam. Class 3B laser product, potential
eye hazard. Warning labels in each box.
R
thjc
R
thja
d
/dT
j
P
Ith
500
800
0.06
0.7
0.6
C/W
C/W
nm/ C
dB
mA
Thermal Resistance - No Heat Sink
Temp. Coefficient -W
avelength
Optical Power - Variation 0 to 70 C
13590.11 1999-04-01
Threshold Current - Variation 0 to 70 C
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(46) 8 58 02 45 00
Fax
(46) 8 58 02 01 10
Tel
(44) 1291 436180
Fax
(44) 1291 436771
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Tel
1-800-96MITEL
Fax
(613) 592-6909
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Tel
(65) 293 5312
Fax
(65) 293 8527
http://www.mitelsemi.com
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Tel: +1 (613) 592 2122
Fax: +1 (613) 592 6909
North America
Tel: +1 (770) 486 0194
Fax: +1 (770) 631 8213
Asia/Pacific
Tel: +65 333 6193
Fax: +65 333 6192
Europe, Middle East,
and Africa (EMEA)
Tel: +44 (0) 1793 518528
Fax: +44 (0) 1793 518581
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