Peer-Reviewed Journal Details
Mandatory Fields
Sumriddetchkajorn, S.,Riza, N. A.
2002
June
Applied Optics
Micro-electro-mechanical system-based digitally controlled optical beam profiler
Validated
()
Optional Fields
41
1818
3506
35103506
An optical beam profiler is introduced that uses a two-dimensional (2-D) small-tilt micromirror device. Its key features include fast speed, digital control, low polarization sensitivity, and wavelength independence. The use of this 2-D multipixel device opens up the important possibility of realizing several beam profile measurement concepts, such as a moving knife edge, a scanning slit, a moving pinhole, a variable aperture, and a 2-D photodiode array. The experimental proof of the optical beam profiler concept using a 2-D digital micromirror device to simulate the 2-D moving knife edge indicates a small measurement error of 0.19% compared with the expected number based on a Gaussian beam-propagation analysis. Other 2-D pixel arrays such as a liquid-crystal-based 90degrees polarization rotator sandwiched between crossed polarizers can also be exploited for the optical beam whose polarization direction is known. (C) 2002 Optical Society of America.An optical beam profiler is introduced that uses a two-dimensional (2-D) small-tilt micromirror device. Its key features include fast speed, digital control, low polarization sensitivity, and wavelength independence. The use of this 2-D multipixel device opens up the important possibility of realizing several beam profile measurement concepts, such as a moving knife edge, a scanning slit, a moving pinhole, a variable aperture, and a 2-D photodiode array. The experimental proof of the optical beam profiler concept using a 2-D digital micromirror device to simulate the 2-D moving knife edge indicates a small measurement error of 0.19% compared with the expected number based on a Gaussian beam-propagation analysis. Other 2-D pixel arrays such as a liquid-crystal-based 90degrees polarization rotator sandwiched between crossed polarizers can also be exploited for the optical beam whose polarization direction is known. (C) 2002 Optical Society of America.
1559-128X; 2155-31651559-
://WOS:000176274200002://WOS:000176274200002
Grant Details