✔ Green Laser Diode Efficiency

Green Laser Diode Efficiency

- April 15, 2018

A wallplug efficiency of 175 is realized at a current of 12 a under continuouswave operation which corresponds to an optical output of approximately 1 w and is the highest value reported to date. Recent advances in fabrication technologies for the semiconducting nitrides of the group iii elements have led to commercially available high efficiency solid state devices that emit green and blue light.

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Green laser diode efficiency. By utilizing the plane the first wattclass green lasers at 530 nm is successfully fabricated and achieve maximum output powers in excess of 2 w which to the best of our knowledge is the highest value reported for any ganbased green laser diode. The wall plug efficiency of the blue ld was 434 at 3a. And pure green lds at 532 nm showed the optical output power of 119 w and the wall plug efficiency of 171 at the forward current of 16a.

A cie chromaticity plot shows that the range of colors produced by a three color laser display is largest when the green laser emits at 523 nm but efficiency is higher with a green laser emitting at the 550 nm peak of eye sensitivity. Light emitting diodes based on these materials should find applications in flat panel displays and blue and ultraviolet laser diodes. In other words a green dpssl using a 25 w pump diode would be expected to output around 500 900 mw of 532 nm light.

Furthermore 543 nm green lds were fabricated on c plane gan substrates. The laser makers know that somewhere in the range of 532 nanometers nm is a very good wavelength for green in a display. Green laser diodes are available at max optical output power 80 mw and the efficiency is typically 5 6 at present.

They are available in 10nm 30nm and 50mw output powers. Features up to 6w at 532 nm from this green laser diode collimated or fiber coupled on chip wavelength stabilized brightlock laser diodes compact oem driver and passive air cooled solutions available smart medical features medica package. The plt series green laser diodes are mounted in a 56 mm package and have built in photodiodes.

Green dpssls are usually around 20 efficient although some lasers can reach up to 35 efficiency. Some of the key reasons being lumens brightness efficiency and color space which will be discussed in the next part of this series. Unfortunately the physics of green lasers makes them hard to produce.