Optical devices based on metal-wire nano-grating

Wen Liu

doi:10.1117/12.747136

21 November 2007 Optical devices based on metal-wire nano-grating

Wen Liu

Proceedings Volume 6781, Passive Components and Fiber-based Devices IV; 67811B (2007) https://doi.org/10.1117/12.747136
Event: Asia-Pacific Optical Communications, 2007, Wuhan, China

Abstract

Based on a new metal-wire nano-grating which we suggested recently, a number of optical devices designs are discussed in this paper. The new metal-wire nano-grating consisted of a series of fine parallel metallic lines embedded in substrate. The unique property of this embedded grating is that it can be adhered with other optical elements arbitrarily and can endure any physical and chemical impact on trial due to the steady homogeneity upper cladding layer. The basic structure of these designs employs four pieces of the artificial material mentioned above. The two pieces at left side work as PBS. The other two pieces at right side work as PBC. When we insert one variable LC (liquid crystal) polarization rotator unit between the PBS and PBC. It could work as an essential 1x2 switch. If the voltage applied on the LC unit is not big enough for 90° rotation, It could work as an essential 1x2 VPS (variable power splitter). Obviously, when we only deploy one input and one output, this is an essential VOA (variable optical attenuator). When we insert one interleaver core between the PBS and PBC, plus two waveplates among the light path, it could works as an interleaver. When we insert one half waveplate and one Farady rotator, between the PBS and PBC, it could works as a circulator. We have actually built a prototype of 1x2 VPS (variable power splitter) device, and the performance meets most of the engineering application requirements.

Citation Download Citation

Wen Liu "Optical devices based on metal-wire nano-grating", Proc. SPIE 6781, Passive Components and Fiber-based Devices IV, 67811B (21 November 2007); https://doi.org/10.1117/12.747136

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KEYWORDS

Polarization

Wave plates

Optical components

Liquid crystals

Mirrors

Virtual point source

Optical design

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