This study proposes an ultracompact and highly sensitive liquid-filled photonic crystal fiber Michelson interferometer (LF-PCFMI) based on material dispersion engineering. Numerical simulations and experimental measurements are performed in the work, and both of their results show that the temperature sensitivity can be more greatly improved than those of conventional photonic crystal fiber int...

A practical temperature sensor by using a highly birefringent fiber loop mirror concatenated with a long-period grating written in a photonic crystal fiber (PCF) is proposed and the sensitivity of the sensor is

Ultrafast lasers with high repetition rates are of considerable interest in applications such as optical fiber telecommunications, frequency metrology, high-speed optical sampling, and arbitrary waveform generation. For fiber lasers mode-locked at the cavity round-trip frequency, the pulse repetition rate is limited to tens or hundreds of megahertz by the meter-order cavity lengths. Here we rep...

Photonic Crystal Fibers can be tailored to increase the effective Kerr nonlinearity, while producing smaller amounts of excess noise compared to standard silicon fibers. Using these features of Photonic Crystal Fibers we create polarization squeezed states with increased purity compared to standard fiber squeezing experiments. Explicit we produce squeezed states in counter propagating pulses al...

We have analyzed the physical origins of the temperature gradient of the ordinary refractive index (dno=dT) of liquid crystals. To achieve a large dno=dT, high birefringence (Dn) and low clearing temperature play crucial roles. Based on these guidelines, we formulated two exemplary liquid crystal mixtures, designated as UCF-1 and UCF-2. The dno=dT of UCF-1 is 4 higher than that of 5CB at room t...

The unintentional birefringence induced by the irregular structure in photonic crystal fibers is analyzed numerically using the plane wave expansion method. The statistical correlations between the birefringence and the various irregularities are obtained. The birefringence is found to be largely dependent on the fiber design parameters as well as the degree of the irregularity. And the large p...

We experimentally demonstrate the nonlinear generation of frequency-dissymmetric sidebands by injecting picosecond pump pulses inside the fundamental mode of a silica-core photonic crystal fiber in its normal dispersion regime. A systematic analysis highlights the fact that this phenomenon is based on the combination of the two major nonlinear effects occurring inside the fiber: self-phase modu...

Photonic crystal fibers (PCFs) have attracted significant attention during the last years and much research has been devoted to develop fiber designs for various applications, hereunder tunable fiber devices. Recently, thermally and electrically tunable PCF devices based on liquid crystals (LCs) have been demonstrated. However, optical tuning of the LC PCF has until now not been demonstrated. H...

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