10 August 2010

Rofin?s PowerLine L Series Designed for High-Speed Micro Material Processing

Rofin has introduced a new laser series for high-speed micro material processing, with a special focus on photovoltaic manufacturing.

With its new PowerLine L series, Rofin introduces q-switched solid state lasers specifically designed for micro material processing applications, which require high average power and high pulse energy. Examples include thin film removal on glass and flexible materials, ablation of dielectric layers, silicon processing together with drilling and cutting operations.

In the 1064 nm class, the PowerLine L 300 completes Rofin‘s laser range for edge deletion applications. Compared to Rofin‘s DQ series, which offers 500 to 1000 watts, the PowerLine L 300 features more than 200 W laser power at 10 KHz with smaller optical fibres and importantly an optimised 400 μm square fibre. Compared to round fibres, square fibres provide greatest efficiency by machining a larger area per pulse.

The Perfect Tool for Mass Production of Enhanced Solar Cells
Selective opening of dielectric layers and direct laser doping currently draw a lot of interest in crystalline solar cell manufacturing. For both applications the frequency-doubled PowerLine L 100 SHG has already proven its suitability as a result of various research projects.

The laser source offers optimum beam characteristics and sufficient power for large scale production. Green lasers with 532 nm show the desired near-surface absorption in silicon and can be equipped with a wide range of long-life optical components and fibres. With optimized fibres, a top-hat beam profile can be realized which provides homogenous energy distribution within the entire laser spot area.

Reliable Design and High Performance Scan Heads

The Nd:YAG lasers are efficiently diode pumped and designed to be reliable within an industrial environment and 24/7 operation. The PowerLine L 100 SHG uses a high performance SHG assembly with harmonic generator crystal for frequency conversion. The unique principle of q-switching makes peak pulse performances possible that are 1000 times higher than the cw laser power. Standard configuration includes a fibre delivery to the processing head. Optional accessories being offered include fibre outcoupling and scan head assemblies supporting scan speeds of > 10 m/sec at unmatched precision.

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