Efficient delivery of 60 J pulse energy of long pulse Nd:YAG laser through 200 𝜇m core diameter optical fibre
Ravindra Singh Ambar Choubey R K Jain S C Vishwakarma D K Agrawal Sabir Ali B N Upadhyaya S M Oak
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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.
Ravindra Singh1 Ambar Choubey1 R K Jain1 S C Vishwakarma1 D K Agrawal1 Sabir Ali1 B N Upadhyaya1 S M Oak1
Volume 97, 2023
Continuous Article Publishing mode
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