This section provides an overview for green lasers as well as their applications and principles. Also, please take a look at the list of 7 green laser manufacturers and their company rankings. Here are the top-ranked green laser companies as of December, 2023: 1.CrystaLaser, 2.RPMC Lasers, Inc., 3.Nuova Mondial Mec Srl.
A green laser is a generic term for lasers that emit light with a wavelength of 532 nm, which is in the visible light region. It is called a green laser because it looks green to the naked eye.
Laser light generated at the fundamental wavelength passes through the nonlinear crystal to a wavelength of 532 nm. Although the energy decreases as it passes through the crystal, the green wavelength is often used for microfabrication and marking because of its high light-collecting ability.
Solid state lasers using Nd:YAG, Nd:YVO4, and Yb:YAG crystals, or semiconductor lasers are often used for green lasers.
Green lasers are used in a wide variety of applications. Familiar examples include markers that project parallel and perpendicular reference lines at construction sites, and laser pointers used at conferences and other events.
In science, they are used for Raman spectroscopy, fluorescence analysis, laser interferometry, and holography.
In the industrial field, green laser-equipped processing machines have been released for microfabrication such as dicing, drilling, and scribing, wafer marking, PCB cutting, and marking.
The basic principle of the green laser is as follows:
The 532nm wavelength is also called the second harmonic generation. The second harmonic generation is the wavelength conversion effect of nonlinear optics. 532 nm light is generated by utilizing the phenomenon that when light of a certain frequency is injected into a certain substance, light with an integral multiple of the frequency is emitted. A fundamental wavelength of 1064 nm is generated, and when that light is passed through a nonlinear crystal (LBO crystal), it is emitted as a wavelength of 532 nm, which is half the value of 1064 nm.
The fundamental wavelength of 1064 nm is generated by Nd:YAG lasers (solid-state lasers using yttrium aluminum garnet crystals doped with neodymium) and Nd:YVO4 lasers (solid-state lasers using yttrium tetraoxide vanadium crystals doped with neodymium).
Since the conversion efficiency is not 100% when passing through a nonlinear crystal, the energy of the light at 532 nm is reduced. However, the green laser is also active in the microfabrication and semiconductor fields because it can process materials (metals) that have a good absorption rate for this wavelength, and because the beam is easier to focus than the fundamental wave.
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CrystaLaser was founded in 1995 and is located in Reno, Nevada, USA, as a manufacturer and designer of ultra-compact diode-pumped solid-state DPSS crystal laser systems. The company provides the widest laser wavelength selections of compact solid-state lasers with over 40 laser wavelength selections including ultraviolet, visible blue, green, red, and near-infrared. CrystaLaser caters to scientists, engineers, and original equipment manufacturers (OEMs) globally. The lasers with varying wavelengths benefit a diverse range of industries including scientific research, engineering projects, and manufacturing processes.
ProPhotonix, established in 1951, and headquartered in Massachusetts, USA, is a manufacturer of LED illumination products and laser diode modules. The company’s products are used in various applications, including industrial, medical, and scientific sectors. The LED solutions provide benefits such as energy efficiency, a long lifespan, and precise control of light output. Laser diode modules offer optimal-performance, stability, and precision for applications like machine vision, alignment, and medical equipment. These products find application in industries such as manufacturing, healthcare, and research. The products’ uniqueness and optimal quality ensures enhanced productivity and precision in various industries.
KYOCERA SOC Corporation, a company established in January 1954 and headquartered in Kanagawa Japan, is a manufacturer and supplier of lasers, optical units, and special lenses. The company offers a wide range of products, including optical elements, excimer laser mirrors, and UV objective lenses, which find applications in various industries, such as automotive, telecommunications, aerospace, and consumer electronics. The company also provides technical support, customization options, and design consultation to meet customers’ needs.
Power Technology, Inc., established in 1969, and headquartered in Arkansas, USA, is a manufacturer of optimal-performance laser diode modules and equipment. The products cater to industries such as defense, medicine, and research. The laser products offer benefits such as advanced stability, precision, and versatility. These lasers are utilized in applications including medical therapies, research experiments, and defense systems. With the assistance of precise technology and advanced engineering, the company provides modernized laser solutions that meet the stringent demands of its diverse customer base. Customized laser solutions are offered for large-scale production, and R&D purposes that help enhance productivity, and efficiency.
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