Professional Knowledge

Lasers of different types
1. Lasers of different types

There are many ways for classifying lasers, one common way is to classify according to different working mediums, by this way, there are solid laser, gas laser, liquid laser and semiconductor laser. Besides, from the different ways of laser outputting, it can also be divided into continuous laser and impulse laser, among which the impulse laser has a very high peak value, and also one can classify different lasers by different light emitting frequency and power.

2. Solid laser

Generally, solid laser features compactness, firmness, easy-to-use, big output power, with base material crystal or the few activation ions equally mixed in glass as the working media. In addition to the ruby and glass introduced previously, the common type of laser also consists of tryvalence Neodymium ions mixed in YAG(yttrium, aluminum, garnet), it can emit NIR(near infrared rays) of 1060nm, with impulse peak value power up to 109 W.

3. Gas laser

Gas laser features simple structure, low cost, easy to use, uniform working media, quality rays and it can work stably for a long time. It is with max varieties and is in wide use, occupying a market around 60%, among which helium-neon laser is the most common one.

4. Semiconductor laser

With semiconductor as its working medium, semiconductor laser is a comparatively matured arsenic gallium laser, can emit 840nm laser. Others are arsenic gallium laser (the one with aluminum mixed in), sulfide chrome laser and sulfide zinc laser. The activating methods are optical pump assisting, electrical activating, etc. Such type of laser is characterized with small volume, light weight, long service time, simple and firm structure, especially suitable for planes, cars, spacercrafts, etc. Lately at 70? the development of optical fiber communication and compact disc technology led to a great promotion for semiconductor lasers.

5. Liquid laser

Common dye laser adopts organic dye as its working medium. Mostly, it will dissolve organic dyes into solvent(ethanol, acetone, water, etc.)or work as steam. Lasers of different wave bands can can be obtained by using different dyes(within range of visible light).Dye laser generally will use laser light as pump assistance, such as the ordinary argon iron laser. The working principle is quite complicated for liquid lasers. Its also characterized with continuously adjustable wavelengths, wide coverage, which in return makes it be widely used.

6. Laser applications on magnetic industry

Laser are widely used in mirco magnet machining. We are specialized in laser cutting, laser micro hole drilling, micromachining SmCo magnets, micro motor rotors, jewel bearings and hard materials. Our micro-hole SmCo magnets, especially the deep-hole thin wall SmCo ring magnets and jewel bearings precisely tooled by laser are widely used for micro motors, fiber optical communication, clocks and watches, scientific apparatus and instruments, electro-acoustics and digital products.

7. Features of laser tooling

1.The laser beam can be focused into a very small point (can reach micron magnitude)

2.High power density enable tooling of super hard and high melting point materials

3.No mechanical contact, no tool spoilage, no deformation

4.Fast processing speed decrease the heat effect to the work piece and materials

5.Tooling can be processed in the air, inert gas and vacuum environment

6.High production efficiency