| ID | 130768 |
| Title Proper | Large aperture, tip tilt mirror for beam jitter correction in high power lasers |
| Language | ENG |
| Author | Ghai, Devinder Pal ; Venkatesh, Anuya ; Swami, Het Ram ; Kumar, Anjesh |
| Publication | 2013. |
| Summary / Abstract (Note) | 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. |
| `In' analytical Note | Defence Science Journal Vol. 63, No.6; Nov 2013: p.606-610 |
| Journal Source | Defence Science Journal Vol. 63, No.6; Nov 2013: p.606-610 |
| Key Words | Tip - Tilt Mirror ; Beam Jitter ; High Power Lasers ; Adaptive Optics |