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A gas laser is a laser in which an electric current is discharged through a gas to produce coherent light. The gas laser was the first continuous-light laser and the first laser to operate on the principle of converting electrical energy to a laser light output. The first gas laser, the Helium–neon laser (HeNe), was co-invented by Iranian-Azerbaijani physicist Ali Javan and American physicist William R. Bennett, Jr. in 1960. It produced a coherent light beam in the infrared region of the spectrum at 1.15 micrometres.
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Gas lasers using many gases have been built and used for many purposes. The helium–neon (HeNe) laser can be made to oscillate at over 160 different wavelengths by adjusting the cavity Q to peak at the desired wavelength. This can be done by adjusting the spectral response of the mirrors or by using a dispersive element (Littrow prism) in the cavity. Units operating at 633 nm are very common in schools and laboratories because of their low cost and near perfect beam qualities. Carbon dioxide lasers, or CO2 lasers can emit hundreds of kilowatts at 9.6 µm and 10.6 µm, and are often used in industry for cutting and welding. The efficiency of a CO2 laser is over 10%.Carbon monoxide or "CO" lasers have the potential for very large outputs, but the use of this type of laser is limited by the toxicity of carbon monoxide gas. Human operators must be protected from this deadly gas. Furthermore, it is extremely corrosive to many materials included seals, gaskets, etc. Argon-ion lasers emit light in the range 351–528.7 nm. Depending on the optics and the laser tube a different number of lines is usable but the most commonly used lines are 458 nm, 488 nm and 514.5 nm. A nitrogen transverse electrical discharge in gas at atmospheric pressure (TEA) laser is an inexpensive gas laser producing UV light at 337.1 nm. Copper laser (copper vapor, and copper bromide vapor), with two spectral lines of green (510.6 nm) and yellow (578.2 nm), is the most powerful laser with the highest efficiency in the visible spectrum. Metal ion lasers are gas lasers that typically generate ultraviolet wavelengths. Helium-silver (HeAg) 224 nm neon-copper (NeCu) 248 nm and helium-cadmium (HeCd) 325 nm are three examples.
The global laser processing market is expected to reach $17.36 billion by 2020, at an estimated CAGR 6.18% between 2014 and 2020. Europe and the Asia-Pacific region are expected to witness the fastest growth in the laser processing market. Europe is expected to expand at a CAGR of 5.92%, whereas APAC is expected to grow at a rate of 6.1%, between 2014 and 2020. The major key players in the laser processing market considered for this report included Trumpf Group (Germany), EpilogLaser (U.S.), Coherent, Inc. (U.S.), Rofin-Sinar technologies (U.S.), Newport Corporation (U.S.), Laserstar technologies corporation (U.S.), and IPG Photonics Corporation (U.S.). As of 2013, APAC is the largest market in terms of size. North America, Europe, and RoW are also considered to be promising markets, along with China, Japan, India, Germany, and the Middle East, which provide impetus to the growth of this industry. This report provides a SWOT analysis of the key players in the laser processing industry. The market has been witnessing a series of new product launch announcements and partnerships, across the value chain.
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