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PRELIMINARY DATA
HIGH POWER QUASI-CW LASER DIODE L8411
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 Low Duty Ratio Type 105 2.0 200 1 +15 to +35 -20 to +40 High Duty Ratio Type 55 2.0 200 20
e
VR Tw DR Top Tstg
Unit W V
sec c c
%
CHARACTERISTICS (Each bar, Ta=20c)
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 Symbol Low Duty Ratio Type Conditions Value 100 120 808 4 2.0 10 35 25 10 25 High Duty Ratio Type Conditions Value 50 Unit W A nm nm V
e
IF
VF
p
e=100W e=100W e=100W e=100W
FWHM
e=50W e=50W e=50W e=50W
FWHM
80 808 5 1.9 10 35 20 10 6
//
Ith -
(degree) (degree)
A mm stack
*Contact sales stuff for emitting wave-length and radiant output power (e) other than above.
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. (c)2000 Hamamatsu Photonics K.K.
HIGH POWER QUASI-CW LASER DIODE L8411
Figure 1: Radiant Output Power vs. Forward Current
120
Low Duty Ratio Type (Typ.)
Pulse Duration=200s Frequency=50Hz
Figure 2: Radiant Output Power vs. Forward Current
High Duty Ratio Type (Typ.)
100 RADIANT OUTPUT POWER (W)
Pulse Duration=200s Frequency=1KHz
RADIANT OUTPUT POWER (W)
100 80 60 40 20 0
80
60
40
20
0 0 50 100 150 FORWARD CURRENT (A)
0
20
40
60
80
100
FORWARD CURRENT (A)
Figure 3: Typical Emission Spectrum
100 RELATIVE RADIANT OUTPUT POWER (%)
Figure 4: Relationship Between Total Optical Output Power and Duty Ratio
2500 TOTAL OPTICAL OUTPUT POWER (W) 1000 500
Funryu-cooling Water-cooling Peltier-cooling
80
60
100 50
40
10
20
0 799
1 802 805 808 811 814 817 WAVELENGTH (nm)
0.1
1 DUTY RATIO (%)
10
20
Figure 5: Dimensional Outline (Unit : mm)
Low Duty Ratio Type (Peltier-cooling) High Duty Ratio Type (Water-cooling)
10.6
20.0
30.0
14.5 CATHODE(-)
30.0
CATHODE(-) 7.9 10.0 14.0
ANODE(+)
ANODE(+)
http://www.hamamatsu.com
HAMAMATSU PHOTONICS K.K., International Sales Division 325-6, Sunayama-cho, Hamamatsu City, 430-8587, Japan, Telephone: (81)53-452-2141, Fax: (81)53-456-7889
U.S.A.: Hamamatsu Corporation:360 Foothill Road, P.O. BOX 6910, Bridgewater, N.J. 08807-0910, U.S.A.Telephone: (1)908-231-0960, Fax: (1)908-231-1218 E-mail: usa@hamamatsu.com Germany: Hamamatsu Photonics Deutschland GmbH: Arzbergerstr. 10, D-82211 Herrsching am Ammersee, Germany, Telephone: (49)8152-375-0, Fax: (49)8152-2658, E-mail: info@hamamatsu.de France: Hamamatsu Photonics France S.A.R.L.: 8, Rue du Saule Trapu, Parc du Moulin de Massy, 91882 Massy Cedex, France, Telephone: 33(1) 69 53 71 00, Fax: 33(1) 69 53 71 10, E-mail: france@hamamatsu.com United Kingdom: Hamamatsu Photonics UK Limited: 2 Howard Court, 10 Tewin Road, Welwyn Garden City, Hertfordshire AL7 1BW, United Kingdom, Telephone: (44)1707-294888, Fax: (44)1707-325777, E-mail: info@hamamatsu.co.uk North Europe: Hamamatsu Photonics Norden AB: Smidesvagen 12, SE-171-41 Solna, Sweden, Telephone: (46)8-509-031-00, Fax: (46)8-509-031-01, E-mail: info@hamamatsu.se Cat. No. LLD1008E01 Italy: Hamamatsu Photonics Italia S.R.L.: Strada della Moia, 1/E, 20020 Arese, (Milano), Italy, Telephone: (39)02-935 81 733, Fax: (39)02-935 81 741, E-mail: info@hamamatsu.it
OCT. 2000 SI Printed in Japan (200)

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