TY - GEN
T1 - Lateral shearing interferometry applied for phase measurement in wavefront coherent synthesis
AU - Hu, Yao
AU - Wang, Wei
PY - 2012
Y1 - 2012
N2 - Wavefront coherent synthesis is widely desired in several important laser systems. Meanwhile, with the help of laser, the following engineering problems can be converted into phase measurement in wavefront coherent synthesis: mirror tiling in large scale astronomical telescopes, and planar diffraction grating tiling in laser pulse compression. The main task for phase measurement in wavefront coherent synthesis is to measure the phase difference between synthesized wavefronts in the form of transmission direction error and piston phase error. In this paper, phase measurement for wavefront coherent synthesis based on lateral shearing interferometer is proposed. No reference beam is necessary so the system is simply structured. Simulations were performed to deduce the quantitative relationship between interferograms and phase errors. A demonstration experiment system of planar mirror tiling was set up. Coherent synthesis of monochromatic wavefront was achieved with transmission direction error of 2″ and piston phase error of 1/20 of the wavelength, with the encircled energy of the far-field diffraction pattern higher than 92.9% of the ideal case.
AB - Wavefront coherent synthesis is widely desired in several important laser systems. Meanwhile, with the help of laser, the following engineering problems can be converted into phase measurement in wavefront coherent synthesis: mirror tiling in large scale astronomical telescopes, and planar diffraction grating tiling in laser pulse compression. The main task for phase measurement in wavefront coherent synthesis is to measure the phase difference between synthesized wavefronts in the form of transmission direction error and piston phase error. In this paper, phase measurement for wavefront coherent synthesis based on lateral shearing interferometer is proposed. No reference beam is necessary so the system is simply structured. Simulations were performed to deduce the quantitative relationship between interferograms and phase errors. A demonstration experiment system of planar mirror tiling was set up. Coherent synthesis of monochromatic wavefront was achieved with transmission direction error of 2″ and piston phase error of 1/20 of the wavelength, with the encircled energy of the far-field diffraction pattern higher than 92.9% of the ideal case.
KW - Astronomical telescope
KW - High-energy laser
KW - Lateral shearing interferometry
KW - Wavefront coherent synthesis
UR - http://www.scopus.com/inward/record.url?scp=84875545382&partnerID=8YFLogxK
U2 - 10.1117/12.974986
DO - 10.1117/12.974986
M3 - Conference contribution
AN - SCOPUS:84875545382
SN - 9780819491022
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - 6th International Symposium on Advanced Optical Manufacturing and Testing Technologies
T2 - 6th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical System Technologies for Manufacturing and Testing
Y2 - 26 April 2012 through 29 April 2012
ER -