P‐206L: Late‐News Poster: Low Electric Consumption 3.6W Green SHG Laser Light Source Applicable to Laser Projection Systems

Abstract

Highly-efficient fully air-cooled green laser light source with frequency doubling module is reported. As a result, 3.6 watts green laser light generation with about 9% wallplug efficiency is achieved. By using fully air-cooled RGB lasers including the green SHG (Second Harmonic Generation) laser and illumination optics for speckle noise reduction, a laser projection engine is prototyped. A laser rear-projection system with this laser projection engine shows several merits; wide color gamut (133%NTSC), 61inch large screen size, and low electric power consumption (less than 100W, at 650cd/mP 2 P ).

Multi-Laser Diodes Condenser/Homogenizer Applicable to Laser Projection Systems

“…5) As for the second problem, among the three primary color lasers, a compact and 3.6 W output green laser which consists of a fiber laser and an second harmonic generation (SHG) device has been reported. 6) At present, maximum light power of 500 mW is available from a single emission type red laser diode (LD) and a blue LD respectively. So, it is necessary to develop a condenser/homogenizer consists of plural LDs to realize a bright laser display.…”