515

Limits

Parameter

Symbol

Test Condition

Min.

Max.

Units

Laser Forward Current

If

DC

120

mA

Laser Reverse Voltage

Vlr

DC

2

V

Photodiode Reverse Voltage

Vr

DC

20

V

Photodiode Forward Current

Ipf

DC

1

mA

Operating Temperature

A

Tc

Temperature measured at case

–40

+85

°C

B

0

+70

°C

Storage Temperature

Ts

–40

+85

°C

Relative Humidity

RH

noncondensing

%RH

Fiber Pull Strength

Three times; 10 sec.

10

N

Mechanical Shock

MIL-STD-883D, Method 2002,

500

G

Condition A

Vibration

MIL-STD-883D, Method 2007,

20

G

Condition A

Absolute Maximum Ratings

Absolute limiting (maximum) ratings mean that no catastrophic damage will occur if the product is subjected to these ratings for short periods,

provided that each limiting parameter is in isolation and all other parameters have values within the performance specification. It should not be

assumed that limiting values of more than one parameter can be applied to the product at the same time.

Performance Specifications

LST242X

LST3421

Parameter

Symbol

Test Condition

Min.

Max.

Units

LASER

CW, over operating temperature

range, Po, as noted below unless

otherwise stated and –20 dB ORL

Rated Optical Power

Po

Tc = ranges specified above, CW

2

mW

Threshold Current

Ith

Tc = +25

°C4

15

mA

Threshold Current

Ith

Over operating temperature range

2

40

mA

Coupled Power in “Off” State

Pth

If = Ith – 2 mA

0

10

µW

Drive Current above Ith,

Id

Tc = +25

°C

12.5

25

mA

Over operating temperature range

-

40

mA

Forward Voltage

Vf

1.6

V

Center Wavelength

λ

Over operating temperature range

1280

1335

nm

Wavelength/Temperature

∆λ/∆T

0.1

nm/

°C

Coefficient

Spectral Width

σ

At –20 dB

1

nm

Side Mode Suppression Ratio

SMSR

+30

dB

Rise and Fall Time

τ

10-90%, Ith to Po

0.5

ns

MONITOR PHOTODIODE

Tc = +25

°C, Vr = 5 V,

Po = Rated Power

Photocurrent

Im

50

1000

µA

Dark Current

Id

Po = 0

µW20

nA

Capacitance

C

1 MHz

10

pF

Tracking Error

∆R

Im = Im (Po, +25

°C)

–1

1

dB

Tc + –40

°C to + 85°C

for Im = Im (Po, +25

°C)