Programmable complex field coupling to high-order guided modes of micro-structured fibres
✍ Scribed by Vincent Ricardo Daria; Peter John Rodrigo; Jesper Glückstad
- Publisher
- Elsevier Science
- Year
- 2004
- Tongue
- English
- Weight
- 438 KB
- Volume
- 232
- Category
- Article
- ISSN
- 0030-4018
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✦ Synopsis
We demonstrate a novel technique for generating tuneable complex field distributions for controllable coupling to high-order guided modes of micro-structured fibres. The optical Fourier transform of grating-based phase patterns, which are encoded on a computer-controlled spatial light modulator, generates complex field distributions for selective launching of a desired mode. Both the amplitude and the phase of the programmable fields are modulated by straightforward and fast adjustments of simple pre-defined binary phase-only diffractive patterns. Experiments demonstrate tuneable coupling to the second-order guided modes of a commercially available index-guiding silica fibre with a triangular lattice air-hole micro-structure.