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Proceedings Paper

Multichannel averaging phasemeter for picometer precision laser metrology
Author(s): Peter G. Halverson; Donald R. Johnson; Andreas C. Kuhnert; Stuart B. Shaklan; Robert Spero
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Paper Abstract

The Micro-Arcsecond Metrology (MAM) team at the Jet Propulsion Laboratory has developed a precision phasemeter for the Space Interferometry Mission (SIM). The current version of the phasemeter is well-suited for picometer accuracy distance measurements and tracks at speeds up to 50 cm/sec, when coupled to SIM's 1.3 micron wavelength heterodyne laser metrology gauges. Since the phasemeter is implemented with industry standard FPGA chips, other accuracy/speed trade-off points can be programmed for applications such as metrology for earth-based long-baseline astronomical interferometry (planet finding), and industrial applications such as translation stage and machine tool positioning. The phasemeter is a standard VME module, supports 6 metrology gauges, a 128 MHz clock, has programmable hardware averaging, and maximum range of 232 cycles (2000 meters at 1.3 microns).

Paper Details

Date Published: 7 May 1999
PDF: 4 pages
Proc. SPIE 3740, Optical Engineering for Sensing and Nanotechnology (ICOSN '99), (7 May 1999); doi: 10.1117/12.347767
Show Author Affiliations
Peter G. Halverson, Jet Propulsion Lab. (United States)
Donald R. Johnson, Jet Propulsion Lab. (United States)
Andreas C. Kuhnert, Jet Propulsion Lab. (United States)
Stuart B. Shaklan, Jet Propulsion Lab. (United States)
Robert Spero, Jet Propulsion Lab. (United States)

Published in SPIE Proceedings Vol. 3740:
Optical Engineering for Sensing and Nanotechnology (ICOSN '99)
Ichirou Yamaguchi, Editor(s)

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