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.

Member of

Group

Parameter

Conditions Symbol

140 W in 200µm

Unit

Maximum output power (1)

c.w.

Pop

110

W

Operating current (2)

c.w.

Iop

11.0

A

Peak wavelength (5)

at Iop

l

890 ±10

nm

Spectral width (FWHM)

Dl

2-6

nm

Threshold current

Ith

<1.9

A

Operating voltage (maximum)

Vf

23

V

Conversion efficiency (maximum)

45

%

Wavelength tuning vs. temperature

l

/ T

0.3

nm/K

Wavelength tuning vs. operating current

l

/ I

0.6

nm/A

Weight

m

1200

g

Thermal resistance (bottom to temp. sensor)

Rth

0.04

K/W

Output fiber (SMA905)

Core diameter of output fiber (minimum)

dcore

200

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

1-2

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

Recommended water temperature

T

<18

°C

Minimum water flux (Industrial Water, no DI-water)

1.5

l/min

Option 4: Fiber sensor

Internal (resistive) fiber detection sensor signal 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)

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 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) Narrower wavelength (+/- 3nm) on request.

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: 100 W, Conversion efficiency: 0.4, Thermal resistance: 0.07 K/W, Internal temperature: 25 °C

Thermal load = 100 W * (1/0.4 - 1) = 150 W, Water temperature = 25 °C - 150 W * 0.07 K/W = 15 °C, (water flux must be adjusted accordingly)