Coating thermal noise for arbitrary shaped beams

Details Coating thermal noise for arbitrary shaped beams Coating thermal noise for arbitrary shaped beams

2006-07-10

arxiv.org/abs/gr-qc/0607035v2

Class.Quant.Grav.23:7627-7630,2006

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

3 pages. Originally performed in August 2004. Submitted to CQG. (v2) : Corrections from referee and others

Scientific paper

10.1088/0264-9381/23/24/N01

Advanced LIGO's sensitivity will be limited by coating noise. Though this noise depends on beam shape, and though nongaussian beams are being seriously considered for advanced LIGO, no published analysis exists to compare the quantitative thermal noise improvement alternate beams offer. In this paper, we derive and discuss a simple integral which completely characterizes the dependence of coating thermal noise on shape. The derivation used applies equally well, with minor modifications, to all other forms of thermal noise in the low-frequency limit.

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