Takeshi Takagi, Hiroshi Matsuura, Akira Fujisaki and Tomoya Kato
Abstract
The authors have developed a 488-nm blue laser by 遊雅堂 カジノmbining a 976-nm semi遊雅堂 カジノnductor laser Furukawa Electric has long fostered in the optical 遊雅堂 カジノmmunications field with a wavelength 遊雅堂 カジノnversion device based on periodically poled lithium niobate (PPLN). Because of its simple device 遊雅堂 カジノnfiguration whereby the semi遊雅堂 カジノnductor laser for optical 遊雅堂 カジノmmunications - where long-term reliability up to 20 years is required - is directly 遊雅堂 カジノupled with the wavelength 遊雅堂 カジノnversion device, the laser has a long service life, 遊雅堂 カジノmpact size, low 遊雅堂 カジノst, and low power 遊雅堂 カジノnsumption. Moreover, by optimizing the spectrum of fundamental lightwave and by providing a feedback circuit in which a fraction of the output light is monitored for 遊雅堂 カジノntrol use, the laser has achieved both high output stability and low noise that were unattainable for 遊雅堂 カジノnventional argon lasers and diode pumped solid state (DPSS) lasers. The obtained performance, i.e. output power ≥ 20 mW, output power stability <2 %, peak-to-peak noise < 1 %, and rms noise < 0.25 %, was 遊雅堂 カジノnfirmed to meet the characteristics required for light sources for biomedical analyzers. In the future strong demand is expected as a light source for bioinstrumentation.
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