LDF beam converter (4 mm∙mrad)Technical data LDF with beam converterComponents LDF with beam converter - Laser Head - Control Unit - Cooling Unit - Operator Panel - Optics - Beam Switches

Diode lasers of LDF Series with beam converter


With up to 4,000 W of laser power, the newly developed diode laser with integrated beam quality converter sets a new benchmark. Based on the long established and proven technology of actively cooled laser diodes, the beam parameter product has been optimized using an active fiber – the converter.

beam-converter

Optimum Combination: High Power and Superior Beam Quality

For the first time the usage of a beam converter opens up new applications which were previously unfeasible for diode lasers such as “Remote Welding”, those which demands very small focus diameters, as well as “Laser Cutting”. These applications expand the classic application portfolio of diode lasers, which includes sheet metal and aluminum welding, cladding, hardening and heat-treating.

The principle of modularity is applied throughout. This makes it easy to adapt the beam source for specific applications. Applications with small focuses and corresponding power densities up to focal lengths of well over 500 mm can be implemented.

Enhancement of LDF series

The laser power is transferred to the workpiece by way of a robot-compatible fiber. The innovative improvement of diode laser beam quality based on an active fiber permits a choice of core diameter from 200 µm upward. This also provides for maximum reliability, easily delivering technical availability levels greater than 99 percent and even with multi-kW power outputs.

The diode with 8 mm mrad is a technical enhancement of the existing highly successful LDF series based on laser diodes only. Starting from a standard diode laser, the laser beam at medium beam quality is first focused into an active fiber rather than a passive fiber. This improves the laser beam quality by conversion technology so that a beam quality better than 8 mm mrad is attained at the active fiber outlet. The wavelength of approximately 1085 nm is only slightly different from existing diode lasers. The downstream components such as the beam swith and passive fiber are also based on the existing and established components of the LDF series. The high degree of modularity of the diode laser enables the system to be upgraded subsequently for example by increasing the laser power or the number of beam outlets, or by adding other components.

Technical data LDF with beam converter

Optical specifications


max. output power 4,000 W 4,000 W 6,000 W
Other laser output powers on request
Minimum beam quality 4 mm∙mrad 6 mm∙mrad 8 mm∙mrad
Optical fiber 100 μm [NA 0.1] 150 μm [NA 0.1] 200 μm [NA 0.1]
Typical focus at  1:1 image 100 µm 150 µm 200 µm
Fiber length 10 m, 20 m, 30 m, different length on request
Fiber-coupling unit LLK-D/Auto
Power stability <+/- 1 % over 2 hours
Wavelength range 1,080 nm +/- 20 nm
 Mechanical specifications
VG Active Weight approx. 650 kg, dimensions: 950 x 770 x 1,935 mm3 (L x W x H)
 Connection data 
Voltage 400 – 480 V, 3 Phases, PE, 50 or 60 HZ
Power connector CEE 32A-6h
Power consumption, typical 15 kW 15 kW 23 kW
Cooling requirements, typical 11.5 kW 11.5 kW 17 kW
Cooling lines 19 mm inner diameter tubing with quick disconnect lines
External inputs digital 24 V, analog power control 0 – 10 V, safety interlocks
 Operating conditions
Temperature 10 – 45 °C operational, 5 – 65 °C storage
Humidity max. 75 % @ 25 °C, with humidity protection max. 85 % @ 35 °C
Protection rating IP54
Safety class Laser safety class 4 according to EN 60825-1
 Options
Upgrade Possibility yes yes no
Inteface PROFINET, Interbus-S, Profibus DP, DeviceNet, EtherNet/IP
Beam switch Time Sharing, 2 fibers
Optics Laserline Optics or commercial optics for every application
Others Teleservice, pilot laser, pyrometer, CCD camera, software for PC, seperate control panel, dust and humidity protection, water chiller with compressor, optics chiller
 Warranty and Lifetime
Warranty 5 years on diode laser elements, 2 years on laser system and converter fiber
Diode cooling Active for highest power density and reliability
Uptime Typically > 99,5 %

All rights reserved. We reserve the right for errors and alterations.

  • Laser Head– Control Unit
  • Cooling Unit
  • Operator Panel
  • Optics
  • Beam Switches

Beam Source


laser-headThe beam source contains several stacks of individual diode bars. The number of bars per stack and the total number of stacks depends on the laser output power and the required beam quality. Using a straightforward, patented technology, the beams of the diodes are overlaid to form a single laser beam that is coupled into an optical fiber.

In most cases, the modular structure of the laser head allows the system to be fitted with additional stacks if extra power is needed.

Control and Supply


control-unitThe compact, mobile supply units, type LDF (VG Power, VG Flex) and LDM controls and monitors the laser head and its peripheral equipment. All components needed to operate the diode laser, including the power supply, cooling unit, and control are modular, easily replaceable components.

Mobile supply units allow new ways of thinking for location independent redundancy concepts. Thus, a separate spare laser can hedge for several production lasers in case of need. The exchange is carried out in a few minutes by trained staff and preventive maintenance or repair can be carried out without the interruption of the production.

More than 70 system data are continuously collected and processed by the system. The integrated failure management works in two stages, allowing the user to react when certain alarm limits are reached before the laser shuts down when error limits are exceeded. In conjunction with the Teleservice Hotline – more than 65% of reported malfunctions can be corrected directly – and the inherent stack management, a high availability of the diode laser system is given.

Accessories and options for diode lasers, type LDF
  • PC visualization through LL-control software
  • Wavelength selection feature e.g. for optimizing the process
  • Beam switch for up to 6 exits, e.g. the multi-station operation with multiple fiber optic cables
  • Additional unit for advanced dust and humidity protection
  • Electrical connection of external cooling devices
  • Integrated optics chiller with separate cooling circuit
  • Advanced programming features
  • Integrated laser power measurement
  • Fieldbus gateway for various protocols
Accessories and options for diode lasers, type LDM
  • Wavelength stabilization for pump applications
  • Control box for LDM
  • Pilot laser for easy visualization
  • Power meter for the manual measurement of the output power

Control and Supply


cooling-unitThe compact, mobile supply units, type LDF (VG Power, VG Flex) and LDM controls and monitors the laser head and its peripheral equipment. All components needed to operate the diode laser, including the power supply, cooling unit, and control are modular, easily replaceable components.

Mobile supply units allow new ways of thinking for location independent redundancy concepts. Thus, a separate spare laser can hedge for several production lasers in case of need. The exchange is carried out in a few minutes by trained staff and preventive maintenance or repair can be carried out without the interruption of the production.

More than 70 system data are continuously collected and processed by the system. The integrated failure management works in two stages, allowing the user to react when certain alarm limits are reached before the laser shuts down when error limits are exceeded. In conjunction with the Teleservice Hotline – more than 65% of reported malfunctions can be corrected directly – and the inherent stack management, a high availability of the diode laser system is given.

Accessories and options for diode lasers, type LDF
  • PC visualization through LL-control software
  • Wavelength selection feature e.g. for optimizing the process
  • Beam switch for up to 6 exits, e.g. the multi-station operation with multiple fiber optic cables
  • Additional unit for advanced dust and humidity protection
  • Electrical connection of external cooling devices
  • Integrated optics chiller with separate cooling circuit
  • Advanced programming features
  • Integrated laser power measurement
  • Fieldbus gateway for various protocols
Accessories and options for diode lasers, type LDM
  • Wavelength stabilization for pump applications
  • Control box for LDM
  • Pilot laser for easy visualization
  • Power meter for the manual measurement of the output power

Control and Supply


operator-panelThe compact, mobile supply units, type LDF (VG Power, VG Flex) and LDM controls and monitors the laser head and its peripheral equipment. All components needed to operate the diode laser, including the power supply, cooling unit, and control are modular, easily replaceable components.

Mobile supply units allow new ways of thinking for location independent redundancy concepts. Thus, a separate spare laser can hedge for several production lasers in case of need. The exchange is carried out in a few minutes by trained staff and preventive maintenance or repair can be carried out without the interruption of the production.

More than 70 system data are continuously collected and processed by the system. The integrated failure management works in two stages, allowing the user to react when certain alarm limits are reached before the laser shuts down when error limits are exceeded. In conjunction with the Teleservice Hotline – more than 65% of reported malfunctions can be corrected directly – and the inherent stack management, a high availability of the diode laser system is given.

Accessories and options for diode lasers, type LDF
  • PC visualization through LL-control software
  • Wavelength selection feature e.g. for optimizing the process
  • Beam switch for up to 6 exits, e.g. the multi-station operation with multiple fiber optic cables
  • Additional unit for advanced dust and humidity protection
  • Electrical connection of external cooling devices
  • Integrated optics chiller with separate cooling circuit
  • Advanced programming features
  • Integrated laser power measurement
  • Fieldbus gateway for various protocols
Accessories and options for diode lasers, type LDM
  • Wavelength stabilization for pump applications
  • Control box for LDM
  • Pilot laser for easy visualization
  • Power meter for the manual measurement of the output power

laserline_cladding_optics2

Beam switch


  • beam-switchesUp to six exits (time-sharing)
  • Efficient multi-station operation
  • Flexibility and safety
  • Integrated beam absorber
  • Internal function monitoring
  • Fast switching times
  • Bus communication