Peer-Reviewed Journal Details
Mandatory Fields
Dun Liu and Walter Perrie and Zheng Kuang and Scully, P. J. and A. Baum and S. Liang and A. Taranu and Edwardson, S. P. and E. Fearon and G. Dearden and Watkins, K. G.
2012
May
Multiple beam internal structuring of poly(methyl methacrylate)
Published
()
Optional Fields
7
2
208
211
Spatial light modulator addressed with computer generated holograms is used to diffract femtosecond laser pulses into > 15 parallel beams and focused simultaneously inside poly(methyl methacrylate) (PMMA) for high throughput 3D refractive index modification. Uniform modification throughout the structure is demonstrated and used to create a 19 μm pitch, 5 × 5 × 3.5 mm3 thick volume grating in <50 minutes with first order Bragg diffraction efficiency > 65\%. Thick volume phase gratings are created by carefully stitching filamentary modifications. PMMA shows a remarkable time dependent Δn, related to the photochemistry during and after exposure.
10.2961/jlmn/2012.02.0014
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