Further analysis shows that it is caused by the enhancement of the threshold current density and threshold carrier density in terms of optical-gain spe.

进一步分析认为，这是因为条宽变窄导致器件阈值电流密度、阈值载流子密度变大造成的。

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The results show that the saturated color density is improved by addition of antioxidant, and the reflection optical density reached 1.

结果表明：抗氧剂的使用可提高热敏层的饱和光密度，使涂层的反射光密度达到1。

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The wavefront power spectral density(PSD) is being adopted for specifying the large optical component employed in high power density solid-state laser for inertial confinement fusion(ICF).

波前功率谱密度（PSD）被用于评价惯性约束聚变（ICF）激光驱动器光学元件中频段的波前误差。

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High-density optical fiber arrays would offer more, and thinner, probes for neuronal exploration than bulky electrodes.

CNN: Brain map seeks to unlock mysteries of the mind

At the time there were two high density optical storage formats being developed.

BBC: NEWS | Technology | Q&A: Death of a format

As we learned when the console was initially announced, the Wii U's "proprietary high-density optical discs" hold up to 25GB of data -- equivalent with that of Sony's single-layer Blu-ray format on the PlayStation 3, and much larger than the Xbox 360's dual-layer DVD format.

ENGADGET: Take a very, very close look at the round-edged Wii U proprietary discs