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Tuesday, January 20, 2009
Mitsubishi Announces Record Power 638nm Diodes For Projectors

Mitsubishi Electric announced today that it has developed a 638-nanometer wavelength laser diode with the world's highest output power of 110 milliwatts for use in palm-size mobile color projectors and other display systems

This laser diode, the ML520G54, also achieves the world's highest wall plug efficiency of 28 percent.

The company plans to start sample shipments on February 1, 2009.

Laser diodes are widely used in optical disc systems, such as recordable DVD players, and optical communication equipment. Recently, the market is seeking to further extend the use of laser diodes to display equipment.

Meanwhile palm-size mobile color projectors, which are used to project applications in personal entertainment players, mobile phones and other mobile equipment, are garnering attention. Among the several methods of projecting these applications, the greatest expectation is being placed on the use of small, high-output and highly efficient laser diodes as a light source, while employing micro mirror devices to scan the laser beams. Such projection technology requires high beam quality and wave-front uniformity; it is also essential for the laser diode to have single lateral-mode lasing characteristics. However, to date, there had been no laser diodes with enough output power and brightness to satisfy mobile color projector manufacturers.

Mitsubishi Electric has utilized its expertise in laser diode production to develop a laser diode for mobile color projectors and other display systems. Of the three colors-- red, green and blue-- used as light sources in mobile color projectors, the ML520G54 offers bright red light, with high output and a lasing wavelength set at 638 nanometers. This development will contribute to the production of brighter mobile color projectors with lower power consumption.

In addition, the model?s compact 5.6-millimeter "TO CAN housing" package makes this laser diode suitable for high-level integration not only in mobile color projectors but also in the laser display apparatus, industrial instrumentation and biomedical fields.

Mitsubishi Electric?s new model also has a wall plug efficiency of 28 percent at 25 degrees C, which is also the highest in the world.

to its optimized materials and structure, the ML520G54 operates at an output power of 110 milliwatts even at a high temperature of up to +50 degrees C.

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