– 2 –

SLD344YT

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

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

θ⊥

θ//

∆X, ∆Y

∆φ⊥

∆φ//

Imon

Rth

Threshold current

Operating current

Operating voltage

Wavelength∗

Radiation angle

Positional accuracy

Differential efficiency

Monitor current

Thermistor resistance

Tth = 25°C

790

20

5

0.5

0.2

1.4

7.0

2.0

23

10

1.1

2.0

10

3.0

9.0

3.0

840

35

15

±100

±3

±4

1.5

4.0

A

A

V

nm

degree

degree

µm

degree

degree

W/A

mA

k

Ω

Perpendicular

Parallel

Position

Angle

∗ Wavelength Selection Classification

Type

SLD344YT-1

SLD344YT-2

SLD344YT-3

Wavelength (nm)

795 ± 5

810 ± 10

830 ± 10

Type

SLD344YT-21

SLD344YT-24

SLD344YT-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