Development of ultrastable filters and lasers for solar seismology

Details Development of ultrastable filters and lasers for solar seismology Development of ultrastable filters and lasers for solar seismology

Jun 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986jhatd...7..209r&link_type=abstract

Johns Hopkins APL Technical Digest (ISSN 0270-5214), vol. 7, Apr.-June 1986, p. 209-216. Research sponsored by Johns Hopkins Uni

Physics

2

Crystal Filters, Helioseismology, Lasers, Optical Filters, Acoustic Frequencies, Acoustic Measurement, Soho Mission, Solar Observatories

Scientific paper

The Stable Solar Analyzer is a recently developed instrument for the measurement of solar magnetic fields and surface velocities that is being employed at the U.S. National Solar Observatory to study the subsurface convection cells of the sun and the structure of surface and subsurface magnetic fields. The Analyzer is expected to ultimately be flown aboard such spacecraft as the ESA/NASA Solar and Heliospheric Observatory. This instrument is based on a crystalline lithium niobate Fabry-Perot filter that is used in conjunction with a stabilized laser that furnishes an absolute wavelength reference; this laser Fabry-Perot combination has achieved wavelength stabilities of the order of 2 parts in 10 to the 10th, over a six-hour interval.

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