UV adjustable optical attenuator

Details UV adjustable optical attenuator UV adjustable optical attenuator

2005-07-21

2008-03-18

Nguyen, Thong Q (Department: 2872)

Optical: systems and elements

Having significant infrared or ultraviolet property

Having ultraviolet absorbing or shielding property

C359S350000, C359S614000

Reexamination Certificate

active

07345813

ABSTRACT:
An optical element includes a light absorbing medium formed of a transparent material and light absorbing elements encapsulated within the transparent material. The light absorbing elements have an ultraviolet (UV) light-dependent absorption characteristic and UV light is applied to the light absorbing medium to change the attenuation of the light absorbing medium to a desired attenuation. UV light is applied to the light absorbing medium in a controlled manner to change the attenuation of the light absorbing medium from an initial attenuation to the desired attenuation. The application of UV light to the light absorbing medium can cause the light absorbing elements encapsulated within the light absorbing medium to degrade such that the amount of light absorbed by the light absorbing medium is reduced. Reducing the amount of light that is absorbed effectively reduces the attenuation of the light absorbing medium.

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English translation of the Japanese reference No. 59-90805.
Zhou, Ming: “Low-loss polymeric materials for passive waveguide components in fiber optical telecommunication.” Optical Engineering, vol. 41, No. 7, Jul. 2002 pp. 1631-1643.

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