Gravitational Wave Group

Investigation of the Sapphire Property
(Thermal Conductivity, Thermal Expansion Ratio, Refractive Index Fluctuation)

Merit of Saphire for Cryogenics

Sapphire at cryogenic temperature is estimated to be a possible solution for the thermal lensing which is expected in the future laser interferometer consuming high power inside from the point of view of high thermal conductivity, low thermal expansion ratio and low refractive Index fluctuation.