Ultra quiet fast laser switch capable of performing time-sharing power control and control method

Abstract

The invention discloses an ultra quiet fast laser switch capable of performing time-sharing power control, which belongs to the technical field of photoelectric detection and control. The ultra quietfast laser switch capable of performing time-sharing power control comprises a DC motor, a fixing frame, a photoelectric detector, a detector mounting blade, rubber gaskets, a motor driving circuit, adigital control module, a laser intensity modulator and the like. The invention also discloses a control method for the ultra quiet fast laser switch capable of performing time-sharing power control.Quick laser switching can be realized, noise during a switching process is greatly reduced, and the laser intensity can be directly controlled.

Description

technical field [0001] The invention belongs to the technical field of photoelectric detection and control, and in particular relates to an ultra-quiet fast laser switch capable of time-sharing power control, and also relates to a control method of the super-quiet fast laser switch capable of time-sharing power control. Background technique [0002] Optical switches are widely used in experiments on atoms, molecules and photophysics. In physical experiments that require fast optical switches, two types of optical switches are generally used, one is based on electro-optic modulator (EOM) or acousto-optic modulator (AOM), and the other is mechanical switch. The advantage of the former is that it is fast (less than 1 μs) and easy to perform amplitude and frequency modulation, but the disadvantage is that it cannot be completely shut down, which may be fatal for some applications that are sensitive to leaked light. For example, in atomic interference experiments, leaked Raman l...

AI Technical Summary

Problems solved by technology

Another mechanical switching speed based on the thermal expansion effect of Ni-Cr wire is 300μs, but the relaxation time is too long (5s)

There are also mechanical switches based on 3D printing and DC motors. The fan speed is 1.22m / s, which is small and easy to manufacture. However, when the current is large and the speed is fast, its heat dissipation and sound vibration are still problems.

In addition to switching the laser, it is also necessary to control the stability of the laser light intensity in related experiments. Usually, a part of the light can be separated to detect and use AOM or EOM to achieve fast amplitude modulation of the beam to feedback control the light intensity. The method of indirectly stabilizing the intensity of the main light that needs to be used by splitting the light intensity is not ideal. Once the splitting ratio fluctuates due to changes in the external environment or the instability of the splitting device, the effect of stabilizing the light intensity will be greatly reduced.

Due to the problems of the mechanical switch mentioned above in the application of precision optical experiments, and the fact that no further real-time and effective detection or stabilization measures have been taken for the power of the laser, there is an urgent need for a device that can simultaneously solve the vibration problem in the current precision optics related experiments. , fast switching laser and optical switch for direct real-time monitoring and stabilizing laser light intensity

Images