Cryogenic measurement of the optical absorption coefficient in sapphire crystals at 1.064 mu m for the large-scale cryogenic gravitational wave telescope

Authors
Tomaru, T Uchiyama, T Tatsumi, D Miyoki, S Ohashi, M Kuroda, K Suzuki, T Yamamoto, A Shintomi, T
Citation
T. Tomaru et al., Cryogenic measurement of the optical absorption coefficient in sapphire crystals at 1.064 mu m for the large-scale cryogenic gravitational wave telescope, PHYS LETT A, 283(1-2), 2001, pp. 80-84
Citations number
21
Categorie Soggetti
Physics
Journal title
PHYSICS LETTERS A
ISSN journal
03759601 → ACNP
Volume
283
Issue
1-2
Year of publication
2001
Pages
80 - 84
Database
ISI
SICI code
0375-9601(20010507)283:1-2<80:CMOTOA>2.0.ZU;2-R
Abstract
We have applied laser calorimetry to the measurement of optical absorption in mono-crystalline sapphire at cryogenic temperatures. Sapphire is a promi sing candidate for the mirror substrates of the large-scale cryogenic gravi tational wave telescope, The optical absorption coefficients of different s apphire samples at a wavelength of 1.064 mum at 5 K were found to average 9 0 ppm/cm. (C) 2001 Elsevier Science B.V. All rights reserved.