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Refractive Q-switching of a ruby laser by a moving plasma
1University of Western Ontario, Physics Department, London, Ontario N6A 3K7.
Applied Optics
|April 17, 2010
Summary
Plasma generated in a shock tube was used to Q-switch a ruby laser. This novel method resulted in measurable laser beam refraction and improved laser cavity alignment.
Area of Science:
- Physics
- Laser Technology
- Plasma Physics
Background:
- Q-switching is a technique for achieving high-intensity laser pulses.
- Controlling plasma density and gradients is crucial for optical applications.
Purpose of the Study:
- To investigate the use of plasma as a Q-switching medium for a ruby laser.
- To analyze the optical effects of plasma within a laser cavity.
Main Methods:
- A ruby laser system was employed.
- Plasma was generated using an electromagnetic shock tube with densities up to 10^18 cm^-3.
- The effect of plasma on laser beam refraction and cavity alignment was measured.
Main Results:
- The plasma successfully Q-switched the ruby laser.
- A significant density gradient from reflected plasma caused measurable laser beam refraction.
- Introduction of plasma into the cavity led to automatic alignment of the initially misaligned laser.
Conclusions:
- Plasma is a viable medium for Q-switching lasers.
- Plasma dynamics can be harnessed for laser beam manipulation and cavity stabilization.
