Femtosecond laser micromachining of waveguides in silicone-based hydrogel polymers |
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Authors: | Ding Li Blackwell Richard I Künzler Jay F Knox Wayne H |
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Affiliation: | The Institute of Optics, University of Rochester, Rochester, New York 14627, USA. |
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Abstract: | By tightly focusing 27 fs laser pulses from a Ti:sapphire oscillator with 1.3 nJ pulse energy at 93 MHz repetition rate, we are able to fabricate optical waveguides inside hydrogel polymers containing approximately 36% water by weight. A tapered lensed fiber is used to couple laser light at a wavelength of 632.8 nm into these waveguides within a water environment. Strong waveguiding is observed due to large refractive index changes. A large waveguide propagation loss is found, and we show that this is caused by surface roughness which can be reduced by optimizing the waveguides. |
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