green laser pointer has a great and wide use

green laser pointer has a great and wide use and application in the practical use
Figure 4 laser mode-locked frequency spectrum. Scanning interferometer piezoelectric ceramic fragile, and should be gently during the experiment. Scanning interferometer light hole, usually do tape sealed to prevent dust from entering. Sawtooth generator does not allow no-load must be connected to the scanning interferometer in order to turn it on. Improve the amplitude of the sawtooth voltage is added to the piezoelectric ceramic, the oscilloscope screen will appear two or three groups of the same shape as the pulse signal, which is why? Whether the mode of the laser output increased by? Why use a scanning interferometer can be displayed on the oscilloscope screen test laser output spectrum structure? The damage of green laser pointer caused by the human factor and so on is not included in the warranty range.
Just lit the laser, the laser output spectrum of the oscilloscope display has been drift, stabilizing after a period of time, why is this? Analysis of the measured Δ value of the error sources. Just to test the ordinal number of the transverse mode laser and only laser in order to observe all the output mode structure, the choice of the scanning interferometer free spectral range What is the difference? Why? Mode-locked with the acousto-optic modulator can be used to traveling-wave work the way? Why? Why should the acousto-optic modulator placed as close as possible to the cavity reflector one. Design an accurate measurement of mode-locked pulse width of the program. Actually, the manufacturer will definitely guarantee the high quality of green laser pointer .
Introduction of the 980 nm red laser. Laser is a major technology in the early 1960s, is considered one of the four great inventions of the 20th century (laser, semiconductor, nuclear and computer), is a long-term quantum physics, spectroscopy the results of research, optics and electronics and other disciplines. Laser science gave birth to so far, although only 50 years, but has become an emerging interdisciplinary. The mechanism of action of laser biology and the rapid development of laser medical equipment have contributed to the creative application of laser in clinical practice and gradually penetrated into all areas of medicine.