MITEL 2B455 Datasheet
PRODUCT INFORMATION
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840nm
2B455
VCSEL Laser Diode
PRODUCT INFORMATION
Datacom
13590.11 1999-04-01
14
Ø2.55
Ø4.7
3.575
5.47
2.5
0.4
VCSEL
Anode
VCSEL Cathode
MONITOR Anode
BOTTOM VIEW
MONITOR
Cathode
CASE NOT CONNECTED
TO-46 Package With Flat Window
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
VCSEL 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
500 8C/W
Thermal Resistance- No Heat Sink R
thja
800 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 incorporates a
photodiode to monitor the optical
power and allow for feedback control.
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.
W ARNING: Laser Radiation, a void exposure
to beam. Class 3B laser product, potential
eye hazard. Warning labels in each box.
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)
Beam Divergence
Q
15 deg Full Width at 1/e
2
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
Monitor Current I
m
20 30 mA IF=12mA, VR>1V
Monitor Dark Current I
d
30 nA VR=5V
Relative Intensity Noise RIN -130 dB/Hz IF=12mA, f=1 GHz
+10
-10
0
+158
+5-5
-15
0
50
%
100
RELATIVE OPTICAL POWER
EMISSION ANGLE
FIGURE 4
FUNCTIONAL SCHEMATIC
Functional Schematic
VCSEL CATHODE
COMMON WITH
MONITOR ANODE
VCSEL ANODE
MONITOR CATHODE
VCSEL
MONITOR
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
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
FIGURE 2
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 U
Po vs T
Ith vs T
Po vs If
840
nm
2B455
VCSEL Laser Diode
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