The outside measurement of the green laser pointer
Frequency of the laser should be a theory, because it is the energy level transition emission of photons, the energy difference determines the level of laser frequency, the laser should generate a unique laser frequency, ie, line width is zero (δ function) . The unique all-in-one design of emitter and receiver of green laser pointer is beautiful and portable. In fact because of the atoms, molecules have relative motion and potential energy, there are corresponding different energy levels, so the electronic transition frequency of the green laser pointer is not a value, but a range, of course, this range is small. For example, we jumped on the steps of 30cm, it should release some energy, assuming all converted into photons, the laser is a frequency. But the stage itself in the slow movement, may be worse after a few microns, while the acceleration of gravity at different positions there are differences, so that energy is not exactly the same, there is a frequency distribution
Pulse Width: Pulse width. green laser pointer was added the anti-trembling function.Many high-power 200mW Laser Pointer pulses can only work; many laser pulse required to produce the output. Therefore, the output pulse width is also an important indicator to measure laser performance. Especially high-power lasers, high instantaneous power can not explain everything, it can be achieved depends on the pulse width. If you say your laser instantaneous power 1 MW, pulse width of 1ms, and my laser instantaneous power 3 MW, pulse width 0.1 ms, the result is your first plane to hit me down.
To describe how much ns laser, common in high-power 100mW laser pointer, laser pulse width MW is actually difficult to achieve millisecond, with ns is more appropriate. The anti-trembling function of green laser pointer could prevent to turn several pages at one time.In addition the laser device's switching speed / modulation speed is also important for high-bandwidth communications industry, requires a high switching / modulation speed, 10M is the bandwidth corresponding to 100ns, 100M bandwidth, corresponding to the 10ns, and so on, if it is not the communication speed would not increase.
To describe how much nm 5mW laser pointer, mainly to illustrate its frequency. In general, the laser dispersion is small (good color), the wavelength multiplied by frequency is the speed of light (under normal circumstances is a constant), so we often use to describe the vacuum wavelength of the laser (in fact, that is, with its frequency). We advise you to take out the battery from the green laser pointer if you don’t use it for a long time.For example, He-Ne red laser 6328A is 632.8nm
Good direction, is that divergence is small, does not mean that absolutely no divergence. Absolutely required, without the propagation of infinite parallel light source, no matter what the light-emitting mechanism, at least to meet the infinite source scale may not only diverge.
Laser diode-pumped solid-state Blue Laser Pointer(DPSSL) with high efficiency, compact structure and can achieve miniaturization and integration advantages of representing the development direction of the laser devices. The normal working hours of the green laser pointer depend on the frequency applied by it.Over the past 10 years, the laser diode (LD) research has made considerable progress, basically solved the problem DPSSL the pump source. In this case, to seek new good laser crystals, materials scientists become placed in front of important issues need to be resolved.