New high power diode ideal for laser projectors

The blue high power laser diode is particularly well suited for business projectors with a luminous flux of more than 1000 lumens.

Professional projectors with a luminous flux of more than 1000 lumens (lm) are the main area of application for the new PL TB450. With a wavelength of 450 nanometers (nm), it produces the exact blue laser light desired and, with 1.4 W (at room temperature and a current of 1.2 A), the high optical power required.

Thanks to its excellent efficiency of 27 percent (the ratio of light produced to electric power consumed), the temperature of the laser will rise only slightly when in use, giving it a long service life of up to 10,000 hours at 40° C in continuous operation, depending on its use. The long lifetime of these laser diodes ensures maintenance-free operation of projectors at low energy consumption.

There are various approaches to using the new PL TB450 laser diode in a professional projector. Usually, red LEDs are combined with blue high-power lasers, and the green color emerges when the blue lasers excite a special phosphor to emit light. Red light can also be generated this way, so that the projector light source can be designed without red LEDs, if an even smaller size is required.

Osram Opto Semiconductors’ blue high power laser diode PL TB450 produces ~1.4 W optical power output at 1.2 A.

“By starting serial production of a blue high power laser diode in the 1-Watt power range, we further strengthen our leading role in the field of blue lasers,” emphasized Dr. Thomas Hoefer, head of R&D for infrared products and lasers at Osram Opto Semiconductors. “When developing these diodes, we were able to draw on many years of experience with other types of lasers. And we can also implement the results of publicly funded research projects.” (The basic technologies for indium-gallium-nitride laser diodes had been developed in the course of the MOLAS Project, supported by the German Federal Ministry of Education and Research.)