Laser Bars
Scheme
Laser bars are a combination of multiple parallel broad area lasers into a single component. Thus it is possible to reach an output power of more than 100 W from a single source.
- Scheme of a Laser Bar
Applications
- Pumping of solid state lasers (e.g. space applications)
- Direct material processing
- Free space communications
- Typography
- Medical technology
Typical wavelengths
- 650 nm
- 808 nm
- 880 nm
- 920 nm
- 940 nm
- 980 nm
- 1060 nm
Chip technology
- Semiconductor layers by means of MOVPE
- Structuring of laser diodes
- Projection lithography
- Wet chemical etch procedures
- Implantation
- Contacts by evaporating and sputtering procedure
- Thinning
- Scribing, splitting, cleaving
- Facet coating and passivation with extremely long lifetimes
Assembly
- Passive heat sinks
- expansion matched
- Additional FAC lenses (fast axis collimator) and external gratings possible
Typical data
- NIR-Range:
- Output power up to 100 W cw on passive heat sinks
- High efficiencies of > 70 % at 808 nm
- Red spectral range (650nm): Output power up to 10 W cw on passive heat sinks [Poster, pdf]