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Green Laser Technology Can Enhance The Future

Sep 3, 2008
Infrared lasers are a type of electromagnetic radiations having a wavelength larger than visible light and wavelength shorter than microwave radiation. Infrared lasers are the key light suppliers for optical fiber communication systems. They are also considered as the best option for typical silica fibers with their wavelengths of 1,330 nm or 1,550 nm. Other major applications of infrared lasers are in cutting, welding, and engraving of hard materials. Because of their ability to provide high power and fine band tunable light, they are widely used in photo acoustic (PA) techniques. Recently carbon dioxide and carbon monoxide lasers are used as light sources in PA detection of gases because of their high power.

Lasers that lie in the green spectral region with a wavelength of 510 to 570 nanometers are termed as green lasers. Green laser technology is used in laser pointers, laser projection displays, interferometers, and for pumping of solid-state lasers such as Ti-sapphire lasers. It is also used in processing different types of materials such as copper, gold, or silicon as they have a much higher absorption coefficient as compared to near-infrared lasers.

Green laser have a low spectrum range for selecting a laser gain media. As a result, this limits its usage and performance. In spite of this, because of their distinctiveness, they are the most regularly used visible lasers.

In the visible light spectrum, green is the brightest color. The frequency of green light is 532 nm. It becomes the brightest possible laser light frequency when a laser is used to condense this light into a high power beam. So, today, green light lasers are used in the most popular forms of handheld laser equipments that are available online and in the open market

The most common lasers include Argon-ion lasers that are created with the amplification of light in argon plasma formed with an electrical discharge. They are potent light sources for various wavelengths and can achieve highest amount of power at 514 nanometers. Green lasers can easily exceed these limits, but will have to use many kilowatts of electrical power and the corresponding increase in dimensions of cooling systems will be significant. Small air-cooled tubes are used in green lasers that require hundreds of watts of electrical power for generating green laser beams of 10 mille-watts capacity. The tubes are very expensive and have a limited operational life around a few thousand hours.

Scientists are researching on how to develop a mechanism that will make it possible to transmit electronic data through green lasers. If this is successfully developed at moderate costs, it will change the way people communicate with each other. Thus, green lasers appear to be a catalyst that can change the communication industry in and out.

Green laser beams, despite being visually spectacular and highly useful in many professional fields, is also cause for extreme caution. If a 532 nm green laser were to directly shine into a person's eye, there is a possibility of laser retinal damage. In order to avoid any green laser eye damage, be sure to take proper safety measures. All green lasers should include standard safety features, but it is ultimately the responsibility of the user to be sure that all spectators and themselves are safe.
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