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      https://www.ias.ac.in/article/fulltext/pram/068/04/0571-0580

    • Keywords

       

      Degree of optical stability; 𝑆 parameter; misalignment tolerance.

    • Abstract

       

      We present an alternative method to specify the stability of real stable resonators. We introduce the degree of optical stability or the 𝑆 parameter, which specify the stability of resonators in a numerical scale ranging from 0 to 100%. The value of zero corresponds to marginally stable resonator and $S < 0$ corresponds to unstable resonator. Also, three definitions of the S parameter are provided: in terms of $A&D$, $B&Z_{\text{R0}}$ and $g_{1}g_{2}$. It may be noticed from the present formalism that the maximum degree of stability with $S = 1$ automatically corresponds to $g_{1}g_{2} = 1/2$. We also describe the method to measure the 𝑆 parameter from the output beam characteristics and 𝐵 parameter. A possible correlation between the 𝑆 parameter and the misalignment tolerance is also discussed.

    • Author Affiliations

       

      Jogy George1 K Ranganathan1 T P S Nathan2

      1. Solid State Laser Division, Raja Ramanna Centre for Advanced Technology, Indore 452 013, India
      2. School of Physics, University of Hyderabad, Hyderabad 500 134, India
    • Dates

       
  • Pramana – Journal of Physics | News

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