Datasheet 2B455 Datasheet (MITEL)

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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