Compensation of Strong Thermal Lensing in High Optical Power Cavities

Details Compensation of Strong Thermal Lensing in High Optical Power Cavities Compensation of Strong Thermal Lensing in High Optical Power Cavities

2006-02-24

arxiv.org/abs/gr-qc/0602096v2

Phys.Rev.Lett.96:231101,2006

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

8 pages

Scientific paper

10.1103/PhysRevLett.96.231101

In an experiment to simulate the conditions in high optical power advanced gravitational wave detectors such as Advanced LIGO, we show that strong thermal lenses form in accordance with predictions and that they can be compensated using an intra-cavity compensation plate heated on its cylindrical surface. We show that high finesse ~1400 can be achieved in cavities with internal compensation plates, and that the cavity mode structure can be maintained by thermal compensation. It is also shown that the measurements allow a direct measurement of substrate optical absorption in the test mass and the compensation plate.

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