HAMAMATSU L8411 Datasheet

HIGH POWER QUASI-CW
LASER DIODE L8411

PRELIMINARY DATA

High power Quasi-CW operation

FEATURES

High optical power : 50 to 100W/bar in average
High stability
Long life
High cost performance

APPLICATIONS

Pumping source for solid state lasers
Materials processing
Welding
Soldering
Medical systems

Our high power Quasi-CW laser diode, L8411, features several advantages such as high stability with long life, high
cost performance with compact structure, and higher peak intensity. It can be applied as light source to pump solid
state lasers, for material processing like welding or soldering, and for medical systems. The lasing areas consist of
small laser emitters arranged in line and are thus called “Bar” structure. A high Quasi-CW output power as high as
10kW at peak was achieved by stacking ten Bars. Cooling methods can be selected from Peltier-cooling, water-cooling
and Funryu-cooling (patent pending : Japan 8-139479, WO 00/11717). A high power laser module with a focusing lens
and a driving electronics are optionally available.

ABSOLUTE MAXIMUM RATINGS (Each bar)

Parameter

Radiant Output Power / bar

Reverse Voltage

Pulse Duration

Duty Ratio

Operating Temperature

Storage Temperature

Symbol

φe

VR

Tw

DR

Top

Tstg

Low Duty Ratio Type

105

2.0

200

1

CHARACTERISTICS (Each bar, Ta=20˚c)

Parameter

Radiant Output Power / bar

Forward Current

Peak Emission Wavelength

Spectral Radiation Half Bandwidth

Forward Voltage

Beam Spread Angle : Parallel

: Vertical

Lasing Threshold Current

Array Length

Maximum Number of Stacks

*Contact sales stuff for emitting wave-length and radiant output power (φe) other than above.

Symbol

φe

IF

λp

∆λ

VF

θ//

θ⊥

Ith

-

-

Low Duty Ratio Type

Conditions

φe=100W
φe=100W
φe=100W
φe=100W

FWHM

Value

100

120

808

4

2.0

10

35

25

10

25

+15 to +35

-20 to +40

High Duty Ratio Type

55

2.0

200

20

High Duty Ratio Type

Conditions

φe=50W
φe=50W
φe=50W
φe=50W

FWHM

Value

50

80

808

5

1.9

10

35

20

10

6

Unit

W

V

µsec

%

˚c
˚c

Unit

W

A

nm

nm

V

˚ (degree)
˚ (degree)

A

mm

stack

Information furnished by HAMAMATSU is believed to be reliable. However, no responsibility is assumed for possible inaccuracies or omissions.
Specifications are subject to change without notice. No patent rights are granted to any of the circuits described herein. ©2000 Hamamatsu Photonics K.K.

HIGH POWER QUASI-CW LASER DIODE L8411

Figure 1: Radiant Output Power vs. Forward Current

Low Duty Ratio Type (Typ.)

120

Pulse Duration=200µs
Frequency=50Hz

100

80

60

40

RADIANT OUTPUT POWER (W)

20

0

0

50

FORWARD CURRENT (A)

100

150

Figure 3: Typical Emission Spectrum

100

80

60

40

Figure 2: Radiant Output Power vs. Forward Current

High Duty Ratio Type (Typ.)

100

Pulse Duration=200µs
Frequency=1KHz

80

60

40

20

RADIANT OUTPUT POWER (W)

0

0

20

40 80

FORWARD CURRENT (A)

60

100

Figure 4: Relationship Between Total Optical Output Power
and Duty Ratio

2500

1000

500

100

50

Peltier-cooling

Funryu-cooling

Water-cooling

20

RELATIVE RADIANT OUTPUT POWER (%)

0

799

802

808

805

WAVELENGTH (nm)

811

Figure 5: Dimensional Outline (Unit : mm)

Low Duty Ratio Type (Peltier-cooling)

10.6

20.0

7.9

814

817

30.0

CATHODE(-)

ANODE(+)

10

TOTAL OPTICAL OUTPUT POWER (W)

1

0.1

1

DUTY RATIO (%)

High Duty Ratio Type (Water-cooling)

14.5

CATHODE(-)

10.0

14.0

10

30.0

ANODE(+)

20

http://www.hamamatsu.com

HAMAMATSU PHOTONICS K.K., International Sales Division
325-6, Sunayama-cho, Hamamatsu City, 430-8587, Japan, Telephone: [phone], Fax: [phone]

U.S.A.: Hamamatsu Corporation:360 Foothill Road, P.O. BOX 6910, Bridgewater, N.J. 08807-0910, U.S.A.Telephone: [phone], Fax: [phone] E-mail: [e-mail]
Germany: Hamamatsu Photonics Deutschland GmbH: Arzbergerstr. 10, D-82211 Herrsching am Ammersee, Germany, Telephone: [phone], Fax: [phone], E-mail: [e-mail]
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United Kingdom: Hamamatsu Photonics UK Limited: 2 Howard Court, 10 Tewin Road, Welwyn Garden City, Hertfordshire AL7 1BW, United Kingdom, Telephone: [phone], Fax: [phone], E-mail: [e-mail]
North Europe: Hamamatsu Photonics Norden AB: Smidesvägen 12, SE-171-41 Solna, Sweden, Telephone: [phone], Fax: [phone], E-mail: [e-mail]
Italy: Hamamatsu Photonics Italia S.R.L.: Strada della Moia, 1/E, 20020 Arese, (Milano), Italy, Telephone: [phone], Fax: [phone], E-mail: [e-mail]

Cat. No. LLD1008E01
OCT. 2000 SI
Printed in Japan (200)