Abstract
1W quasi-white-light source has been generated from a single lithium tantalate with cascaded domain modulation. The quasi-white-light is combined by proper proportion of the red, green and blue laser light. The red and the blue result from a compact self-sum frequency optical parametric oscillation when pumped by a single green laser. The efficiency of quasi-white-light from the green pump reaches 27%. This compact design can be employed not only as a stable and powerful RGB light source but also an effective blue laser generator.
Highlights
Red, green, and blue (RGB) are the three primary colors in the visible world
1W quasi-white-light source has been generated from a single lithium tantalate with cascaded domain modulation
The quasi-white-light is combined by proper proportion of the red, green and blue laser light
Summary
It can be used to produce most of the visual colors including the white-light by weighted combination. It is very useful in the laser display, laser TV, laser illumination and so on. One solution based self-doubling and self-sum-frequency generation from a single laser crystal has been reported [2,3]. Quasi-phase-matching (QPM) materials called χ(2)-modulated crystal is another unique solution for this high-power and compact-design light source. Most of the previous works are concentrated on harmonics generations through a single QPM crystal pumping by several fundamental laser sources [4,5,6]
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