Antiresonant guiding photonic crystal fibers for distributed temperature gradient measurements

We propose, design, and experimentally demonstrate a novel, simple, distributed refractometric measurement technique based on unique spectral properties of antiresonant-guiding photonic crystal fibers for measuring temperature gradients. We use a simple and accurate analytical model and numerical simulations to guide our experiments. The proposed technique may find applications for monitoring and control of chemical and biological reactions in microfluidic systems.