Sony SLD343YT Datasheet

– 1 –

SLD343YT

PE00198-PS

4W High Power Laser Diode

Description

The SLD343YT has a compatible package, and

allows independent thermal and electric design.

It is a high power laser diode that affords easy

optical design.

Features

• High-optical power output
Recommended optical power output: PO = 4.0W

• High-optical power density: 4W/200µm

(Emitting line width)

Applications

• Solid state laser excitation

• Medical use

• Material processing

• Measurement

Structure

AlGaAs quantum well structure laser diode

Operating Lifetime

MTTF 10,000H (effective value)
at Po = 4.0W, Tth = 25°C

Absolute Maximum Ratings (Tth = 25°C)

• Optical power output PO 4.4 W

• Reverse voltage VR LD 2 V

PD 15 V

• Operating temperature (Tth) Topr –10 to +30°C

• Storage temperature Tstg –40 to +85°C

Equivalent Circuit

Sony reserves the right to change products and specifications without prior notice. This information does not convey any license by
any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating the
operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits.

M-288

TE Cooler

Case LD

PD

TH

1345678910

Preliminary

Warranty

This warranty period shall be 90 days after receipt of the product or
1,000 hours operation time whichever is shorter.
Sony Quality Assurance Department shall analyze any product that
fails during said warranty period, and if the analysis results show
that the product failed due to material or manufacturing defects on
the part of Sony, the product shall be replaced free of charge.
Laser diodes naturally have differing lifetimes which follow a Weibull
distribution.
Special warranties are also available.

No. Function

1
2
3
4
5

TE cooler (negative)

—
Case
Laser diode (anode)
Thermistor

6
7
8
9

10

Thermistor
Laser diode (cathode)
Photo diode (anode)
Photo diode (cathode)
TE cooler (positive)

Pin Configuration (Top View)

– 2 –

SLD343YT

Electrical and Optical Characteristics (Tth = Thermistor temperature, Tth = 25°C)

Handling Precautions

Eye protection against laser beams
The optical output of laser diodes ranges from
several mW to 10W. However the optical power
density of the laser beam at the diode chip
reaches 1.5MW/cm2. Unlike gas lasers, since
laser diode beams are divergent, uncollimated
laser diode beams are fairly safe at a laser
diode. For observing laser beams, ALWAYS use
safety goggles that block infrared rays. Usage of
IR scopes, IR cameras and fluorescent plates is
also recommended for monitoring laser beams
safely.

Item

Symbol

Conditions

Min.

Typ. Max. Unit
Ith
Iop
Vop

λP
θ⊥
θ//

∆X, ∆Y
∆φ⊥
∆φ//

ηD

Imon
Rth

Threshold current
Operating current
Operating voltage
Wavelength

∗

Radiation angle

Positional accuracy

Differential efficiency
Monitor current
Thermistor resistance

PO = 4.0W
PO = 4.0W
PO = 4.0W

PO = 4.0W

PO = 4.0W

PO = 4.0W
PO = 4.0W

VR = 10V
Tth = 25°C

790

10

5

0.5

0.2

1.0

4.6

2.0

23
10

1.1

1.0
10

2.0

6.5

3.0

840

35
15

±100

±3
±4

1.5

4.0

A
A
V

nm
degree
degree

µm
degree
degree

W/A

mA

kΩ

Perpendicular
Parallel
Position

Angle

∗

Wavelength Selection Classification

Type
SLD343YT-1
SLD343YT-2
SLD343YT-3

Wavelength (nm)

795 ± 5
810 ± 10
830 ± 10

Type
SLD343YT-21
SLD343YT-24
SLD343YT-25

Wavelength (nm)

798 ± 3
807 ± 3
810 ± 3

Safety goggles for
protection from
laser beam

IR fluorescent plate

Optical
material

Lens

Laser diode

Optical board

Optical power output control device
Temperature control device