Some potential core optic materials and their properties

Below we list several materials which could be used for advanced core optic materials and their mechanical and optical properties.

Mechanical Properties

Material	Best Bulk Resonator Q	Density (cm/cm^3)	Youngs modulus (Gpa)	Poisson ratio
Silica	2x10^7(Ref.1)	2.202	72.6	0.16
Sapphire	2x10^8(Ref.2)	3.987	400	0.23
YAG	2x10^7(Ref.3)	4.55	283	0.25
Spinel	NA	3.577	275	0.28

All unreferenced numbers are from the "Electro-Optics Handbook," Ronald Waynant and Marwood Ediger Editors,McGraw-Hill, Inc., 1994, pages 11.13-11.23.

Ref.1

Ref.2 "Systems with small dissipation," V.B. Braginsky, V.P Mitrofanov, and V.I. Panov, The University of Chicago Press, 1985, Page 30.

Ref.3 Sheila Rowan private communication, Ginzton Laboratory, Stanford University, Stanford, California, 94305-4085, (650)723-1178, srowan@loki.stanford.edu

Optical Properties

Material	Crystal Class	Absorption  @ 1064 nm	dn/dT  (10^-6)	Refractive index
Silica	NA	1 ppm/cm (Ref.1)	11	1.4506
Sapphire	Hexagonal	? (Ref.2)	? (Ref.4)	1.7555(o) 1.7478(e)
YAG	Cubic	100 ppm/cm (Ref.3)	7.6(Ref.5)	1.815
Spinel	Cubic		250	1.701

All unreferenced numbers are from the "Electro-Optics Handbook," Ronald Waynant and Marwood Ediger Editors,McGraw-Hill, Inc., 1994, pages 11.13-11.23.

Ref.1 Virgo reference

Ref.2

Ref.3 Martin Fejer, private communication, Ginzton Laboratory, Stanford University, Stanford, California, 94305-4085, (650)725-2160, fejer@leland.stanford.edu.

Ref.4

Ref.5 "Solid-State Laser Engineering," Walter Koechner, Springer Verlag, 1996, pg. 51.

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Last Update: 3/30/99
sbretz@stanford.edu