laserrör

A laserrör, or laser tube, is a key component in many laser systems. It is a sealed enclosure containing a medium that, when excited by an energy source, emits laser light. The specific type of laserrör depends on the laser's intended application and the wavelength of light it needs to produce.

Common types of laserrör include gas lasers, solid-state lasers, and semiconductor lasers. Gas lasers, such as helium-neon or carbon dioxide lasers, use a mixture of gases as their active medium. The gas is excited by an electrical discharge. Solid-state lasers utilize a crystalline or glass material doped with specific ions, like ruby or neodymium-doped YAG (Nd:YAG). Excitation is typically achieved through flashlamps or other lasers. Semiconductor lasers, also known as diode lasers, use a p-n junction in a semiconductor material to generate light when an electrical current is applied.

The laserrör is crucial for the amplification of light through stimulated emission. Inside the tube, mirrors are usually placed at either end to reflect the light back and forth through the active medium, increasing its intensity. One of these mirrors is partially transparent, allowing a portion of the amplified light to escape as the laser beam. The design and construction of the laserrör directly influence the power, wavelength, and coherence of the emitted laser light. Laserrörs are found in a wide array of devices, from industrial cutting and welding equipment to medical surgical tools and scientific research instruments.