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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 28, Iss. 7 — Apr. 1, 1989
  • pp: 1369–1377

Efficiency measurements of reflection gratings in the 100–300-Å band

John F. Meekins, Michael P. Kowalski, and Raymond G. Cruddace  »View Author Affiliations


Applied Optics, Vol. 28, Issue 7, pp. 1369-1377 (1989)
http://dx.doi.org/10.1364/AO.28.001369


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Abstract

We have measured zero- and first-order efficiencies of plane diffraction grazings over the 100–300-Å band using the NRL beamline facility at the National Synchrotron Light Source. Measurements were taken at grating angles of 5°, 10°, and 15° and the incident radiation was polarized primarily in the transverse magnetic mode. Four (three laminar, one blazed) of the gratings were ion etched in high quality quartz blanks, overcoated with 200 Å of gold. A fifth (blazed) grating was ruled in gold. The line densities are 1000, 2000, and 3600 grooves/mm for those with laminar profiles. Both blazed gratings have a blaze angle of 8° and line densities of 3600 grooves/mm. Measured first-order efficiencies up to 15% were obtained for the laminar gratings and up to 8% was obtained for the ion-etched blazed grating. Much lower efficiencies (≤2%) were measured for the ruled grating. A computer program was written to calculate grating efficiencies using a full electromagnetic model. Measured efficiencies of the ion-etched gratings agree well with predicted values, but the measured first-order efficiency of the ruled grating is much lower than predicted.

© 1989 Optical Society of America

History
Original Manuscript: April 28, 1988
Published: April 1, 1989

Citation
John F. Meekins, Michael P. Kowalski, and Raymond G. Cruddace, "Efficiency measurements of reflection gratings in the 100–300-Å band," Appl. Opt. 28, 1369-1377 (1989)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-28-7-1369


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