The most popular use of laser technology is the up gradation of DVD and CD players and CD and DVD writers. The miraculous work these gadgets perform I all the courtesy of the laser pointer, located inside the device. It is a small but powerful component works as sharp optical stylus. It helps the players (CD & DVD) to decode or read the data and information stored on the CD/DVD surface in the shape of small pits.

Depending on the graph of the up gradation of the readability of the laser it can be predicted that in very near future the CD /DVD writes will be able to write/transfer/convert/data and information according to the requirement. The readability of the laser depends on the wavelength of the laser and that is why the shorter the wavelength the readability will be proportionately better and more is the readability it will be able to read smaller pits. More the pits will be smaller in size it will be able to contain more information and this is the ky to the development of Mp4 or MP5 discs containing more and more data.

Presently the laser, inside the CD/DVD players are made out of gallium arsenide (GaAs) and from the semiconductors of the same range. The peculiar traits of these materials are that once these are energized these elements emit a light with the wavelength of approximately 820 nanometers. This wavelength has the capacity to read the pits of one-micron size. This is the special character of blue laser that has made it different from old red lasers. And the introduction of this blue laser has created CDs and DVDs with more material and information. This device has made the multimedia applications more versatile than ever before and it can be expected it will improve more and more in near future.