Refractive index modulation device and method of refractive inde

Optical: systems and elements – Optical modulator – Having particular chemical composition or structure

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359275, 525478, 528 15, G02F 100

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057399484

ABSTRACT:
A refractive index modulation element made of a refractive index modulation material. The refractive index can be thermally modulated. The refractive index modulation material can be a silicone resin represented by the following formula R.sub.n SiO.sub.(4--n)/2,where the average value of n is 0.5 to 3 and where K is an aliphatic or aromatic group with 1 to 18 carbon atoms or other functional group. The silicone resin has a spectral transmission factor that on average is higher than 80%, within the wavelength range of 350 nm to 1,600 nm, and a refractive index temperature dependence of -0.001/.degree.C. to -0.00005/.degree.C.

REFERENCES:
patent: 5239406 (1993-08-01), Lynam
patent: 5355245 (1994-10-01), Lynam
Electronics Letters, vol. 24, No. 8, Apr. 14, 1988.
Applied Optics, vol. 25, No. 21, Nov. 1, 1986.
Patent Abstracts of Japan, vol. 017, No. 387, Jul. 20, 1993.

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