Lumics GmbH Berlin. This specification is subject to change without notice.

Parameter

Condition

Symbol

LU0808C230

Unit

Peak output power (1)

cw

Pop

230

W

Operating current (2)

cw

Iop

23

A

Maximum Forward current (2)

Imax

25

A

Peak wavelength (6)

at Iop

l

808 ± 10

nm

Spectral width (FWHM)

at Iop

Dl

2-6

nm

Threshold current

Ith

5

A

Operating voltage (max.)

Vf

25

V

Conversion efficiency

40

%

Wavelength tuning vs. temperature

l

/ T

0.3

nm/K

Wavelength tuning vs. operating current

l

/ I

0.3

nm/A

Weight

m

1200

g

Thermal resistance (from bottom to internal temp. sensor) Rth

0.04

K/W

Output fiber connector

FSMA 905

Core diameter of output fiber

dcore

1000

µm

Fiber centricity

10

µm

Numerical aperture

NA

0.22

Temperature sensor

LM35, NTC (10k) or PT100/1000 (please specify)

Power monitor

PD

5-30

mV/W

Options

Option 1: Red pilot laser

C.w. output power min. value (4)

Ppilot

1-3

mW

Peak wavelength

l

pilot

635 ± 10

nm

Operating voltage

5

V

Option 2: Green pilot laser

C.w. output power min. value (4)

Ppilot

1-3

mW

Peak wavelength

l

pilot

520 ± 10

nm

Operating voltage

8

V

Pilot power control

Ppilot_contr

0-5

V

Option 3: Water Cooling Base Plate

Water temperature

T

<15

°C

Water quality

Industrial Water, no DI-water, filtered particle size <0.1mm

Minimum water flux

7.0

l/min

Option 4: Fiber sensor

Internal (resistive) fiber detection sensor supply voltage

12

V

A second fiber sensor is an external inductive sensor with three wire cable (Vcc=12V, GND, Signal 12/2V when fiber is plug/not plugged)

Option 5: 1064nm back reflection filter (35dB on request) (5)

18

dB

Notes: * taken at internal temperature sensor, Avoid direct feedback from materials like mirrors, optics, processed material etc. back into laser module via the fiber cable by more than

10%.

(1) Power is measured ex fiber according to given fiber specifications including measures and tolerances of fiber and ferrules for uncoated fiber facets.

(2) Do not exceed maximum forward current by more than 5% above the given operating current and if given by the maximum current otherwise the laser diode may be damaged.

(3) Rule of thumb: Power ex fiber decreases up to 5% (<1100nm) and up to 7% (>1400nm) every 10 °C temperature increase at internal temperature sensor. Lifetime decreases

by about factor of two every 10 °C. Required flatness of customer heat sink 0.05mm over 150mm to achieve necessary contact to the heat sink.

(4) Red and green minimum pilot power is set at factory by customer request. Standard is 1 mW.

(5) Back reflection at 1064nm is considered as 10ns pulse with 5% d.c. max. Back reflection filter reduces power by 2% (18dB) or 4% (35dB).

Calculation example of necessary water temperature for 300 W output power:

Thermal load = Output power * (1/conversion efficiency - 1), Water temperature = internal temperature - thermal load * Thermal resistance

Example: Output power: 300 W, Conversion efficiency: 0.37, Thermal resistance: 0.02 K/W, Internal temperature: 25 °C

Thermal load = 300 W * (1/0.37 - 1) = 500 W, Water temperature = 25 °C - 500 W * 0.02 K/W = 15 °C, (water flux must be adjusted accordingly)

Electrical and Optical Characteristics

Typical laser specifications at 25° C *

We manufacture diode lasers.

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