Efficient delivery of 60 J pulse energy of long pulse Nd:YAG laser through 200 𝜇m core diameter optical fibre

Pramana

D K Agrawal¹  S C Vishwakarma¹  Ambar Choubey¹  B N Upadhyaya¹  S M Oak¹  R K Jain¹  Ravindra Singh1¹  Sabir Ali¹ 

[1] Solid State Laser Division, Raja Ramanna Centre for Advanced Technology, Indore 452 013, India$$

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

DOI  :  

学科分类：物理（综合）

来源: Indian Academy of Sciences

【 摘 要 】

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.

【 授权许可】

Unknown