The manufacturer will change the design of back end of Laser Pointer

The manufacturer will change the design of back end of Laser Pointer .
Optical information processing and optical storage, optical computer optical coupling of the external device has an important purpose. The advent of the semiconductor laser has greatly promoted the development of information photonics technology, it is the fastest growing in the field of optical communications, the most important important light source of the laser optical fiber communication. semiconductor laser coupled with a low-loss optical fiber, a significant impact on the optical fiber communication, and accelerate its development. Therefore we can say that the emergence of semiconductor lasers, on today's optical communication. GaAs / GaAlAs double heterostructure lasers are important light in optical fiber communication and atmospheric communications, now, all long-distance, large capacity optical transmission systems all use distributed feedback semiconductor lasers . Black material or match can be burnt  by Laser Pointer successfully.
Semiconductor lasers are widely used in optical disc technology, optical disc technology is set computing technology, laser technology and digital communication technologies in an integrated technology is a high-capacity, high-density, fast, effective and low cost information storage means, it needs to semiconductor laser beam write and read Specifically, we take a look at several common applications of semiconductor lasers: the quantum well semiconductor high-power lasers have important applications of laser processing, precision machinery parts, but also as a solid The ideal laser, high-efficiency pump source due to its high efficiency, high reliability and miniaturization of the advantages, resulting in a solid-state laser continuously updated - in the printing industry and the medical field, high-power semiconductor laser applications. Of course, the high power Laser Pointer would be more expensive than the low power laser pointer.
In addition, as the long-wavelength laser for optical communications, short wavelength lasers for optical disc read since NaKamura GatnN / QaN blue laser, visible light semiconductor laser in the CD-ROM system has been widely used, such as cD player, DVD system and high-density optical memory visible surface-emitting lasers have important applications in the CD-ROM, printers, monitors, especially the red, green and blue surface emitting lasers broader application of blue-green semiconductor lasers for underwater communications, laser printing, high-density information to read and write, and advice that will be used as a major deep-water detection and applied to large-screen color display and high-definition color TV. Normally, the bigger the power of Laser Pointer is, the higher the price will be.
In short, visible semiconductor lasers used as light source of the color display, optical storage read and write, laser printing, laser printing, high-density optical storage systems, bar code reader, and solid-state laser pump source such as have a wide range use quantum cascade laser, a new type of laser used in the field of environmental testing and medical examination.