Electronic Design
Multi-Chip Laser Diode Produces 50 W For Projectors

Multi-Chip Laser Diode Produces 50 W For Projectors

With up to 20 blue laser chips packed into a single package for projection applications, compact laser module doubles the optical output of the individual chips, resulting in an overall blue light output of 50 W.

Osram’s new PLPM4 450 compact laser module combines up to 20 blue laser chips into a single "butterfly" package for projection applications, instead of constructing a light source from individual laser diodes. The multi-chip module doubles the optical output of the individual chips, resulting in an overall blue light output of 50 W. This means that professional laser projectors can achieve a brightness level of more than 2,000 lumens with only one component. If several modules are installed in a projector, brightness levels far in excess of 5,000 lumens are possible. To achieve the high optical output, engineers optimized the chip parameters to double the single-chip output from 1.6 W to 3.2 W and also improved the thermal resistance of the module. The package measures 25.5 x 35 mm and accommodates four copper bars with up to five blue laser chips connected in series and operated at 2.3 A each. The multi-chip laser diode offers a light output of 50 W from a typical electrical input of 165 W, with wavelengths of 440 to 460 nm, and achieves an efficiency of 30%. Volume production of the PLPM4 450 multi-chip laser module will start at the end of 2014. Samples will be available in the summer.

OSRAM OPTO SEMICONDUCTORS

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