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    • Keywords


      Nd:YAG laser; long pulse laser; fibre-optic beam delivery; axial gradient index lens; beam quality.

    • Abstract


      Most of today’s industrial Nd:YAG lasers use fibre-optic beam delivery. In such lasers, fibre core diameter is an important consideration in deploying a beam delivery system. Using a smaller core diameter fibre allows higher irradiances at focus position, less degradation of beam quality, and a larger stand-off distance. In this work, we have put efforts to efficiently deliver the laser output of ‘ceramic reflector’-based long pulse Nd:YAG laser through a 200 𝜇m core diameter optical fibre and successfully delivered up to 60 J of pulse energy with 90% transmission efficiency, using a GRADIUM (axial gradient) plano-convex lens to sharply focus down the beam on the end face of the optical fibre and fibre end faces have been cleaved to achieve higher surface damage thresholds.

    • Author Affiliations


      Ravindra Singh1 Ambar Choubey1 R K Jain1 S C Vishwakarma1 D K Agrawal1 Sabir Ali1 B N Upadhyaya1 S M Oak1

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

  • Pramana – Journal of Physics | News

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      Posted on July 25, 2019

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