In this paper, we have reported a new design and demonstrated the analytical study of the hollow core negative curvature fibers (HCNCFs). Hollow core negative curvature fibers (HCNCF) is a kind of hollow core leaky mode optical fiber, which is defined by the negative curvature of the core boundary. These typical optical fibers consist of an arrangement of capillaries tightly packed over the hollow core. Due to their unique arrangement it creates a boundary of negative curvature with respect to the core of the fiber. As compared to with photonic bandgap fiber this specially designed hollow core negative curvature fiber shows low loss, wide bandwidth and maximum power confined in the core. Numerical simulations were performed using COMSOL software to study the properties of HCNCFs. In the simulations, it was found and reported that the capillary thickness is the most important factor determining the attenuation of HCNCFs. These features make the negative curvature fiber highly advantageous with tremendous potential applications in optical communication and sensor applications.
The optical fiber sensor for higher pressure detection based on surface-plasmon resonance (SPR) phenomena is design and analysed. The optical fiber is coated with a thin film of metal by removing cladding from core of a multi-mode optical fiber. The calculated pressure sensitivity is based on two parameter. First one is the derivative of the resonance wavelength of SPR-based optical sensor with respect to the refractive index of surrounding medium; the second is the derivative of refractive index of polymer with respect to the pressure. The proposed structure can be suitable for high sensitivity pressure measurements, for various industrial applications.
We have described a dispersion characteristics of hollow-core multi-clad index profiles, which include
a hollow core. The designs satisfy the most important requirements for applications in long haul communication.
This design fiber shows zero dispersion at 1550 nm can be obtained for the fundamental air core mode over a wide
wavelength range by introducing the partial reflector layer around the core, optimizing expanded core size and silica
cladding thickness. Also analyze dispersion compensating properties of these fibers. This unique structure of the
fundamental air core mode is presented by the introduction of partial reflector cladding around the core. The
potential applications of hollow-core multi clad fibers in long-haul optical communication system.
In this paper, we analyze the guided properties of liquid core optical fibers for fiber-to-thehome application. Fiber to the Home is advance technology to give unlimited bandwidth and high speed broadband network for communication. Fiber to the Home technology refers to the installation and use of bend insensitive optical fiber cables. The liquid core optical fiber has a simple core and cladding structure. This fiber achieves high relative refractive index difference among the core and cladding is proving to be bending insensitive. The single mode condition and the group velocity dispersion, mode field diameter and the bending loss of single mode fiber are studied theoretically. Compare with traditional silica optical fiber. Liquid core optical fiber has much smaller bending loss of than traditional silica fibers. Liquid core optical fiber shows unique properties, such as more confided guided mode, low bending loss and large non linear parameters in the visible and infrared region. This type of fiber used in fiber -to-the-home applications, Broadband network and also for sensing applications.
Proc. SPIE. 9659, International Conference on Photonics Solutions 2015
KEYWORDS: Optical fibers, Step index fibers, Refractive index, Fiber to the x, Cladding, Signal attenuation, Structured optical fibers, Single mode fibers, Electronics engineering, Standards development
A Comparative study of step-index and trench-assisted single mode fiber in terms of bending losses and mode field diameter is carried out. Trench- index fiber proved to be a potential candidate for fiber-to-the-home application.