SMART precision interferometry at 794 nm

Details SMART precision interferometry at 794 nm SMART precision interferometry at 794 nm

Feb 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003spie.4838.1127m&link_type=abstract

Interferometry for Optical Astronomy II. Edited by Wesley A. Traub . Proceedings of the SPIE, Volume 4838, pp. 1127-1138 (2003

Astronomy and Astrophysics

Astronomy

3

Scientific paper

Single-mode fibers have been used in the near-infrared to dramatically reduce calibration error for long-baseline interferometry. We have begun an effort to apply the advantages of spatial filtering at visible wavelengths for precision measurements of pulsating Cepheids using the IOTA interferometer. Rather than employing photometric taps to calibrate fluctuating coupling efficiency, we are using an "asymmetric" coupler which allows this calibration to be done without losing photons. The Single-Mode Asymmetric Recombination Technique (SMART) experiment has finished lab-testing, and has been installed at IOTA for full commissioning in Summer 2002. We report the results of lab characterization and first sky tests, as well as first fringes on a star using a visible-wavelength single-mode coupler. With both lab and sky experience using unpolarized light, we have found that circular silica fibers are quite practical for precision interferometric measurements. We conclude that circular fibers (as opposed to polarization maintaining fibers) have an undeserved poor reputation and that birefringence effects pose no significant difficulty.

Affiliated with

Also associated with

No associations

Rating

SMART precision interferometry at 794 nm does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with SMART precision interferometry at 794 nm, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and SMART precision interferometry at 794 nm will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-915384