| Green laser pointers were first commercially | | | | Green lasers can be used for a variety of |
| sold in the year 2000. They operate at the | | | | roles. They can be used as pointing devices. |
| wavelength of 532 nm. Laser diodes of this | | | | The ability to form a continuous line in the |
| wavelength are not available so the green | | | | dark is an added advantage; this has lead to |
| light is obtained by the use of "DPSSFD" | | | | its usage as rescue lights as it can be seen |
| laser technology. | | | | from miles away. It as been used for laser |
| | | | light shows. It is also used for sky gazing |
| The process:- | | | | as a person can pinpoint a star by using the |
| | | | green laser. It can also be as laser pointers |
| A very high-powered Infrared laser diode | | | | for guns, rifles. In the movie Alien vs. |
| working at 808 nm pumps a tiny block of Nd: | | | | Predator it was used as a pointing device on |
| YVO4 that generates light at 1,064 nm. This | | | | some G36k carbines. |
| feeds a potassium titanyl phosphate | | | | |
| intracavity frequency doubler crystal that | | | | Advantages:- |
| produces green light of a visible 532 nm | | | | |
| wavelength. High-powered green lasers use | | | | The green laser has many advantages. It is |
| lithium triborate instead of KTP. | | | | fifty times brighter than a red laser because |
| | | | of which it can be seen from miles away, this |
| Features:- | | | | helps in being rescued if a person is lost. |
| | | | It can also be used in high-tech weapons for |
| An infrared filter, which is behind the | | | | aiming purposes. Because of its high range, |
| mirror completely, removes the radiation of | | | | Green laser pointers can be equipped in |
| infrared spectrum from the output beam. In | | | | different kinds of weapons. High and low |
| order to reduce cooling problems and prolong | | | | temperatures do not affect the performance of |
| battery life, some green lasers operate in | | | | Green laser pointers so in case a person is |
| pulse or quasi-continuous-wave (QCW) mode. | | | | lost in a desert, he can still use Green |
| The Class III a laser product gives an output | | | | laser pointers to call for help, in other |
| power of 5mw. This is the one of | | | | case, even if a person is lost some where in |
| highest-powered street legal laser. Some | | | | mountains all covered with ice, he can still |
| green lasers even have an output of 10 mw, | | | | use it. |
| which has a range of 20,000 feet in darkness. | | | | |
| Some even have a 3-second delay feature as | | | | Disadvantages:- |
| these are high-powered lasers and can blind a | | | | |
| person. Some laser point extenders are also | | | | Due to its high power it can permanently |
| available. They work by using lenses to | | | | damage a person's eye. As it can form a |
| minimize the beam spread of a laser. Its | | | | continuous line of light that might reveal a |
| price starts from 55$. Majority of them have | | | | person's position so it cannot be used in |
| a life of around 3000 hours. | | | | stealthy operations or by SWAT. |
| | | | |
| Applications:- | | | | Green laser is quite awesome but it should be |
| | | | used carefully. |