Level meter - how many types of lasers are there? What are the characteristics of each?
A laser in which the medium is a gas, which is excited by an electrical discharge.
1. He-Ne laser: the most important red light source (632.8 nm). Generally, the power is relatively low (0.5~50 mW).
2. Carbon dioxide laser: with a wavelength of about 10.6 μm (infrared), an important industrial laser.
3. Carbon monoxide laser: the wavelength is about 6-8 μm (infrared), and it only works under cooling conditions.
4. Nitrogen laser: 337.1 nm (UV).
5. Argon ion laser: with multiple wavelengths, 457.9 nm (8%), 476.5 nm (12%), 488.0 nm (20%), 496.5 nm (12%), 501.7 nm (5%), 514.5 nm (43 %, from blue light to green light). Power from 15mW to 50W. Most commonly used in laser shows.
6. Helium-cadmium laser: the most important blue light (442nm) and near-ultraviolet laser source (325nm).
7. Krypton ion laser: with multiple wavelengths, 350.7nm, 356.4nm, 476.2nm, 482.5nm, 520.6nm, 530.9nm, 586.2nm, 647.1nm (the strongest), 676.4nm, 752.5nm, 799.3nm (from blue light to deep red light). The power can reach 6W, the energy consumption is relatively large, and the price is relatively high.
8. Mixed gas laser: It does not contain pure gas, but a mixture of several gases (usually argon, krypton, etc.).
9. Excimer lasers: such as KrF (248 nm), XeF (351-353 nm), ArF (193 nm), XeCl (308 nm), F2 (157 nm, all ultraviolet).
10. Metal vapor laser: such as copper vapor laser, the wavelength is between 510.6-578.2 nm. Due to the good reinforcement, the resonant mirror can be omitted.
11. Metal halide lasers: such as copper bromide lasers, the wavelength is between 510.6-578.2 nm. Due to the good reinforcement, the resonant mirror can be omitted.
