How Did Sony Develop Worlds Highest-power Red Laser Diode?
Sony Corp developed a 635nm red semiconductor laser with an optical output of 7.2W, which the company claims is “the world’s highest output” in this wavelength range. The red semiconductor laser prototypeThe laser is intended for use as a light source in projectors and expected to be used in combination with the existing mercury (Hg) lamp light source. We asked Daisuke Imanishi, who was involved in the development of the laser, about the company’s intentions behind the development of the latest prototype, its features and key technologies that realized the laser (interviewer: Satoshi Okubo). Mr Imanishi is a chief engineer and a senior laser engineer at the Super Laser Section of the Advanced Light Technology Department of the Core Device Development Group of Sony. In about 2006, Sony announced the concept of a projector that uses a red semiconductor laser and a Hg lamp as its light source. At that time, a 643nm laser was used. Why did you choose a 635nm laser this time? Imanishi: We d
