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7 March 2014 Fiber Bragg grating filter using evaporated induced self assembly of silica nano particles
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Proceedings Volume 8982, Optical Components and Materials XI; 898225 (2014)
Event: SPIE OPTO, 2014, San Francisco, California, United States
In the present work we conduct a study of fiber filters produced by evaporation of silica particles upon a MM-fiber core. A band filter was designed and theoretically verified using a 2D Comsol simulation model of a 3D problem, and calculated in the frequency domain in respect to refractive index. The fiber filters were fabricated by stripping and chemically etching the middle part of an MM-fiber until the core was exposed. A mono layer of silica nano particles were evaporated on the core using an Evaporation Induced Self-Assembly (EISA) method. The experimental results indicated a broader bandwidth than indicated by the simulations which can be explained by the mismatch in the particle size distributions, uneven particle packing and finally by effects from multiple mode angles. Thus, there are several closely connected Bragg wavelengths that build up the broader bandwidth. The experimental part shows that it is possible by narrowing the particle size distributing and better control of the particle packing, the filter effectiveness can be greatly improved.
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Krister Hammarling, Renyung Zhang, Anatoliy Manuilskiy, and Hans-Erik Nilsson "Fiber Bragg grating filter using evaporated induced self assembly of silica nano particles", Proc. SPIE 8982, Optical Components and Materials XI, 898225 (7 March 2014);

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