Optical phase-front inscription over optical fiber end for flexible control of beam propagation and beam pattern in free space |
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| Affiliation: | 1. Department of Information and Communications, Gwangju Institute of Science and Technology, 1 Oryong-dong, Buk-gu, Gwangju 500-712, South Korea;2. Department of Material Science and Engineering, Gwangju Institute of Science and Technology, 1 Oryong-dong, Buk-gu, Gwangju 500-712, South Korea;3. Department of Physics, Yonsei University, 134 Shinchon-dong, Seodaemun-gu, Seoul 120-749, South Korea |
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| Abstract: | We report a novel compact all-fiber technique to control the beam propagation and beam pattern in free space. By coating an azo-polymer thin film layer on the optical fiber end surface, various surface relief grating (SRG) structures were inscribed over the film using a single step direct exposure of interference patterns to form a novel organic/inorganic composite fiber optics beam shape converter. The linear and concentric SRGs were experimental characterized along with numerical simulations. |
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