It is tested and detected according to the power meter of cell phone jammer

It is tested and detected according to the power meter of cell phone jammer .
Where back and forth in the cavity once the optical path, to spread the circle of the optical path in the case of the ring cavity, that is, reverse the spread of two laser beams of different optical path, with different oscillation frequencies, should satisfy reverse the spread of two-beam laser frequency difference. On an optical path difference of expression, have to type in the area of the ring cavity, the circumference of the ring cavity, which shows that, despite the small size of the ring laser can also be quite large number of the beat frequency, which is because the cavity of the active medium gain process so that the oscillation of the laser linewidth is much smaller than the line width of the passive cavity, so that the frequency difference measurement error is greatly reduced. Such as the ring laser as shown in Figure 6-38 [31] laser wavelength of 633nm. It is the power of cell phone jammer which the customer asks and needs.
Unilateral of the triangle side length of 0.1m, when the rotation angular velocity of 0.1 degrees / hour, the frequency deviation of 0.044Hz. The results show that, despite the very slow rotation speed, or can be accurately measured. Figure 6-38 ring laser schematic. The precise angle of the ring laser. Beat Based on the above formula, from moment to moment, the turning angle of the ring laser, in this time interval the cumulative beat fringe number can be used corner indicates that the type beat frequency counting linear relationship with the corner, which ring laser as the angle and angular rate sensor principle formula. In fact, the ring laser goniometer is also subject to zero drift, atresia, geomagnetism, nonlinear effects.
The identification of all of these substances by observing Rayleigh scattering, Mie scattering, or Raman scattering. Raman scattering of light encountered the atomic or molecular scattering, due to the inherent vibration and rotation of the scatterer and the exchange of energy between photons and atoms or molecules, resulting in the phenomenon of the frequency of the scattered light to change. Raman scattering characteristics, due to the different composition and molecular structure, therefore, will receive the scattering spectral lines spectrophotometry. Spectrometry can easily identify the molecular species. Laser radar can be informed of the types of molecules suspended in the air and the number and distance, the use of the information contained in short laser pulses can be time-series observations for each pulse. It includes the laser color, laser power, laser energy, laser range or laser consumption of cell phone jammer .