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Desighning and Construction of a Passive Q Switched Nd:YAG Laser and Amplifier with Electrical Power Supply

Soltani, Adel | 2016

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 48964 (04)
  4. University: Sharif University of Technology
  5. Department: Physics
  6. Advisor(s): Sadighi-Bonabi, Rasoul
  7. Abstract:
  8. Nd:YAG laser is one of the most applicable laser for researches and development where it's basic wavelength and harmonics are used on different laser project. It's basic output has a wide pulse duration and low peak power ,therefore in order to increase the peak power the pulse duration is reduced by Q-switching.In this project by means of passive Q-switch technique an energy equivalent to 500 mj with 10to 20 ns pulse duration is extracted from the oscillator and the output energy is amplified to about 850mj in a single pass through amplifier. In this project we used saturable absorber for Q-switching because it is more optimum and simpler than other Q-switching techniques like acoustooptic or electrooptic Q-switching. Also the circuits of power supply like simmer board, charger and discharger boards have been designed by proteus software Also the tempreture effect of rod and flashlamp on the cavity of resonator has been simulated by comsol multiphysics software which by cavity tempreture field we can estimate the tempreture of the rod which its effect can be used on beam profile of this laser in the future works, also one can study the effect of the rod tempreture on the M2 factor of this laser
  9. Keywords:
  10. Saturable Absorber ; Peak Power Consumption ; Yag Lasers ; Amplifiers ; ND: Yag Laser ; Passive Q Switch ; Rot Tempreture

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