Large Aperture, Tip Tilt Mirror for Beam Jitter correction in High Power Lasers

  • Devinder Pal Ghai Laser Science and Technology Centre, Delhi
  • Anuya Venkatesh Laser Science and Technology Centre, Delhi
  • Het Ram Swami Laser Science and Technology Centre, Delhi
  • Anjesh Kumar Laser Science and Technology Centre, Delhi
Keywords: Tip-tilt mirror, beam jitter, high power lasers, adaptive optics

Abstract

This paper describes a large aperture tip-tilt mirror (TTM) assembly for correction of beam jitter in high power lasers. The design intricacies and trade-offs among various parameters of TTM to meet the desired goals are discussed. The TTM assembly uses a 180 mm diameter and 5 mm thick silicon mirror glued onto the movable ring of a solid flexure. Four stacked piezo-ceramic based actuators have been used to incorporate angular tilts of the mirror along two orthogonal directions. Simulation studies have been carried out to study the dynamics of the TTM. The performance of the TTM assembly in both static and dynamic condition is provided. An experimental set-up is described to test the TTM performance in closed loop conditions. A tilt correction of ±200 micro-radians along two orthogonal directions with a closed loop bandwidth of 20 Hz has been achieved.

Defence Science Journal, 2013, 63(6), pp.606-610, DOI:http://dx.doi.org/10.14429/dsj.63.5760

Author Biographies

Devinder Pal Ghai, Laser Science and Technology Centre, Delhi
Dr Devinder Pal Ghai obtained his MTech (Instrumentation) from IIT Madras, in 1996 and PhD (Singular Optics) from IIT Delhi, in 2009. Presently, he is heading Adaptive optics Technology Division in the Laser Science and Technology Centre, Delhi. He has filed one international and three national patents. He is currently involved in activities such as Adaptive optics, underwater laser communication, laser proximity fuse, and velocity interferometer for any reflector (ViSAR).
Anuya Venkatesh, Laser Science and Technology Centre, Delhi
Ms Anuya Venketesh obtained MSc (physics) from Lucknow university. presently, she is Scientist ‘D’ at Laser Science and Technology Centre, Delhi. Her area of interests includes: Adaptive optics, underwater communication and laser proximity fuse.
Het Ram Swami, Laser Science and Technology Centre, Delhi
Mr Het Ram Swami obtained BTech (Mechanical Engineering) from MNIT, Jaipur. presently, he is Scientist ‘D’ at Laser Science and Technology Centre, Delhi. His area of interests includes Adaptive optics, laser proximity fuse and velocity interferometer for any reflector (ViSAR).
Anjesh Kumar, Laser Science and Technology Centre, Delhi
Mr Anjesh Kumar completed his Be (Electronics and Communication) from MDu, Rohtak. presently, he is Scientist ‘C’ at Laser Science and Technology Centre, Delhi. His area of interests includes Adaptive optics and underwater communication.
Published
2013-12-18
How to Cite
Ghai, D., Venkatesh, A., Swami, H., & Kumar, A. (2013). Large Aperture, Tip Tilt Mirror for Beam Jitter correction in High Power Lasers. Defence Science Journal, 63(6), 606-610. https://doi.org/10.14429/dsj.63.5760