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      Permanent link:
      https://www.ias.ac.in/article/fulltext/sadh/033/04/0443-0453

    • Keywords

       

      Disc amplifier; high power lasers; dual polarity power supply; dry nitrogen cooling system.

    • Abstract

       

      A large aperture disc amplifier has been designed, set-up and characterized for its performance on small signal gain, spatial variation of gain, and thermal recovery time. This amplifier, consisting of three elliptical Nd: phosphate glass discs of size 214 × 114 × 20 mm mounted at Brewster angle and pumped by ten xenon filled flash lamps of 600 mm arc length, provided a small signal gain of 6 at electrical pump energy of 36 kJ (in a pulse of 450 𝜇s) using an in-house developed dual-polarity capacitor bank based power supply. It was coupled to a high power Nd: phosphate glass laser chain and a maximum output pulse energy exceeding 100 J in a 1·5 ns (FWHM) pulse has been measured. A dry nitrogen gas based cooling system was developed for cooling the glass discs with a thermal recovery time of ∼ 20 minutes.

    • Author Affiliations

       

      M P Kamath1 P K Tripathi1 A P Kulkarni1 R Chandra1 A S Joshi1 C P Navathe1 P D Gupta1

      1. Laser Plasma Division, Raja Ramanna Centre for Advanced Technology, Indore 452 013
    • Dates

       
  • Sadhana | News

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