Optical fiber nanowires and microwires: fabrication and applications

Contributed Review: Optical micro- and nanofiber pulling rig

“…[14][15][16] Of the many available waveguide types, the tapered optical fiber -otherwise known as the optical micro-or nanofiber (MNF) -is an important device in these research fields because it is relatively easy to fabricate, produces a strong evanescent field, and can be directly integrated into existing fiber optic systems. The main general requirements for an MNF are (i) a uniform waist with an optical wavelength scale diameter and (ii) taper transitions that satisfy the adiabatic condition, 17,18 i.e., the fibers should have low loss.…”

High Sensitivity Fiber Refractometer Based on an Optical Microfiber Coupler

“…While maintaining the same useful attributes as conventional optical fibers, microfibers have several extra advantages such as micro-scale size, large evanescent field, strong light confinement and great configurability [2]. Those unique properties give microfiber based photonic devices the potential to form the basis of novel sensors offering high sensitivity, small footprint, compact size, low cost and fast response.…”

Optical microfibers and nanofibers

“…By coiling or tying a MNF into a loop or knot, the light guided by the MNF can recirculate inside the closed-loop circular cavity through evanescent coupling at the joint area. The Q factor (the ratio of the wavelength to the full width at half-maximum (FWHM) [205]) of this kind of resonators can go beyond 100,000 in loop [42] ring [81] and coil [137] structures, with highest finesses (the ratio of the free spectral range (FSR) to the FWHM and relates to losses per resonator round trip rather than per optical cycle [205]) up to 100 in a knot structure resonator with double-ended taper fibers [50].…”