Up to now, the infrared lasers used for this purpose have deviations in wavelength stability of up to 40 nanometers as temperature in the component rises. As a result, the LiDAR system’s ‘vision’ was a bit blurred. A novel chip design from Osram now reduces the wavelength shift to just ten nanometers, enabling much clearer and sharper images of the surroundings.
Thanks to the newly developed chip design, edge-emitting lasers can match and even exceed the wavelength stability of VCSELs at operating temperatures of up to 125°C typical for automotive applications. This technological milestone in the development of infrared lasers allows the use of a much smaller wavelength filter on the detector, significantly improving the signal-to-noise ratio.
This technological advance has been demonstrated in components with ‘triple-junctions’, such as three light-emitting surfaces stacked one on top of the other. In the future, it will be used in all Osram infrared lasers and offer enormous advantages to LiDAR system manufacturers.
