Electrical and Optical Characteristics

Typical laser specifications at 25° C *

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

We manufacture diode lasers.

Parameter

Conditions

Symbol

14 W

30 W

50 W

75 W

Unit

in 105 µm

in 200 µm

in 200 µm

in 400 µm

Max. output power (1)

c.w.

Pop

14

30

50

75

W

Operating current (2)

c.w.

Iop

7.5

13

13

20

A

Peak wavelength at Iop

l

1470 ± 20

1470 ± 20

1470 ± 20

1470 ± 20

nm

Spectral width (FWHM) at Iop

Dl

6-13

6-13

6-13

6-13

nm

Threshold current

Ith

0.6

1.1

1.1

1.7

A

Operating voltage

Vf

8

11.5

20

20

V

Conversion efficiency

20

20

20

20

%

Wavelength tuning vs. temperature

l

/ T

0.7

0.7

0.7

0.7

nm/K

Wavelength tuning vs. operating current

l

/ I

3

2

2

1

nm/A

Weight

m

1200

1200

1200

1200

g

Thermal resistance (bottom to temp. sensor) Rth

0.04

0.04

0.04

0.04

K/W

Output fiber (SMA905)

Core diameter of output fiber

dcore

105 **

200/400

200/400

400

µm

Fiber centricity

5

10

10

10

µm

Numerical aperture

NA

0.22

0.22

0.22

0.22

Temperature sensor (10 kOhm)

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

Power monitor

PD

100-300

100-300

100-300

100-300

mV/W

Options

Option 1: Red pilot laser

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

Ppilot

1-3

1-3

1-3

1-3

mW

Peak wavelength

l

pilot

635 ± 10

635 ± 10

635 ± 10

635 ± 10

nm

Operating voltage

5

5

5

5

V

Option 2: Green pilot laser

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

Ppilot

1-2

1-2

1-2

1-2

mW

Peak wavelength

l

pilot

520 ± 10

520 ± 10

520 ± 10

520 ± 10

nm

Operating voltage

8

8

8

8

V

Pilot power control

Ppilot_contr

0-5

0-5

0-5

0-5

V

Option 3: Water cooling base plate w/o cap

Water temperature

T

<18

<18

<18

<15

°C

Minimum water flux (industrial water, no DI-water)

0.3

0.5

0.6

0.6

l/min

Option 4: Fiber sensor

Internal (resistive) fiber detection sensor signal voltage

12

12

12

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)

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%.

** LuOcean P2 in 105 µm fiber is supplied either in combination with water cooling base plate (option 3) or copper base plate.

(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 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.

Calculation example of necessary water temperature for 10 W output power:

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

Example: Output power: 10 W, Conversion efficiency: 0.2, Thermal resistance: 0.1 K/W, Internal temperature: 25 °C

Thermal load = 10 W * (1/0.2 - 1) = 40 W, Water temperature = 25 °C - 40 W * 0.1 K/W = 21 °C, (water flux must be adjusted accordingly)

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