A laser differs from other sources of light in that it emits light that is coherent. Spatial coherence allows a laser to be focused to a tight spot, enabling uses such as optical communication, [6] laser cutting, …

光谱（laser spectra）以激光为光源的光谱技术。 与普通光源相比， 激光光源 具有单色性好、亮度高、 方向性 强和 相干性 强等特点，是用来研究光与物质的相互作用，从而辨认物质及其所在体系的结构 …

Dec 25, 2025 · Laser, a device that stimulates atoms or molecules to emit light at particular wavelengths and amplifies that light, typically producing a very narrow beam of radiation. The emission generally …

激光的语源 LASER 是由英文“Light Amplification by Stimulated Emission of Radiation” 的各单词首字母组成的缩写词，意思是“通过受激发射光扩大”。

Nov 28, 2024 · An easy-to-understand explanation of how lasers work, with a simple diagram showing what's inside a laser.

A laser is a light source with three important characteristics. Laser light is monochromatic, meaning the light is highly concentrated around a central wavelength, with very little emitted at other wavelengths.

激光 （英語： laser，新加坡称 镭射，香港称 激光/雷射，台湾称 雷射）是 英文 “ 受激辐射 产生的 光放大 ”（Light Amplification by Stimulated Emission of Radiation）的 缩写，指透过刺激 原子 导致 电 …

Dec 25, 2025 · The combination of laser medium and resonant cavity forms what often is called simply a laser but technically is a laser oscillator. Oscillation determines many laser properties, and it means …

Dec 25, 2025 · A laser uses a pair of mirrors facing each other—an optical resonator—to build up the light energy in the beam. As light bounces back and forth between the mirrors, it passes through the …

雷射 （英語： laser，新加坡稱 鐳射，中國大陸稱 激光，香港稱 激光/雷射）是 英文 「受激輻射 產生的 光放大」（Light Amplification by Stimulated Emission of Radiation）的 縮寫，指透過刺激 原子 導 …