We manufacture diode lasers.

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Parameter

Symbol (Conditions)

105µm

600µm

Unit

Optical Characteristics

Maximum output power (1)

Pop (c.w.)

10

25

W

Peak wavelength (at Iop)

lpeak (c.w.)

785 ± 5

785 ± 10

nm

Spectral width (FWHM)

lFWHM

2-7

2-7

nm

Spectral shift with temp.

lT_Shift

0.3

0.3

nm/K

Spectral shift with current

lI_Shift

1

0.6

nm/A

Electrical Characteristics

Forward current at maximum power

Iop (c.w. at Pop)

4

8.5

A

Absolute maximum forward current

Iop (c.w. at Pop)

4.5

9.5

A

Forward voltage

Vop (c.w. at Pop)

7

7

V

Threshold current

lth

< 1

< 1.6

A

Conversion efficiency

(c.w. at Pop)

40

40

%

Fiber

Fiber core diameter

105

600

µm

Fiber centricity

±10

±10

µm

Numerical Aperture

NA

0.22

0.22

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

Electrical and Optical Characteristics (Typical laser specifications at 25° C *)

Options / General Parameter / Accessories

Parameter

Symbol

Min

Typ

Max

Unit

Pilot Beam (Option (5))

Pilot Beam Output Power

red/green - adjustable (6)

0

3/0.5

1/3

mW

Pilot Beam Wavelength

red/green

650±10 / 520±10

nm

Pilot Beam Operating Voltage

red/green

4/7

5/8

V

Pilot Beam Operating Current

red/green

<35/125

mA

Pilot Beam Intensity Control Voltage

red/green (7)

0(max. Intensity)

5(min. Intensity)

V

Sensors (Options)

Power Monitor Supply Voltage

10

12

14

V

Power Monitor Signal Voltage

0

4 (at max. Power)

V

Fiber Detection Sensor Supply Voltage

10

12

14

V

Fiber Detection Sensor Signal Voltage

0

12

14

V

Temperature Sensor

Standard NTC (10k) or optional (PT100 or LM35)

Notes: * taken at internal temperature sensor, - power drop read note (3) ** we recommend to operate the laser above dew point

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

materials like mirrors, optics, processed material etc. back into laser module via the fiber cable by more than 10%. Given value is the maximum power level. For given max. power level

operating current and voltage can deviate by max.10% from typcial values and is lower than maximum values. Please choose your laser driver design accordingly.

(2) Do not exceed maximum forward current for rated power as given above by more than 5% 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.

(4) Required flatness of customer heat sink 0.05mm over 100mm.

(5) Red and green minimum pilot power is set at factory by customer request. Standard is 3/0.5 mW.

(6) Adjust trimpot R6 to set maximum intensity with pin 10 control left open or set to 0.5V

(7) Adjust trimpot R4 to set intensity off with pin 10 control set to 5V

(8) Calculation example of thermal load and necessary thermal resistance of heat sink to maintain internal diode temperature of 25°C :

Thermal load = Output power * (1/conversion efficiency - 1)

Heat sink thermal resistance = (25 °C - ambient temperaure) / thermal load

Example: Output power: 22 W, Conversion efficiency: 0.22, Thermal resistance between bottom of module to internal temperaure sensor: 0.1 K/W, Internal temperature: 25 °C

Thermal load = 22 W * (1/0.22 - 1) ~ 80 W , Heat sink thermal resistance = (25 °C - 20 °C) / 80 W = 0.06 K/W

(9) VBG (Volume Bragg Grating) ensures that 95% of optical output power is within +/-0.5 nm of specified wavelength.