Backscatter Factor and Scattering Loss of Spatially Large Defects in Single-Mode Fibers

Frequenz ◽  
1993 ◽  
Vol 47 (9-10) ◽  
Author(s):  
Wolfgang Höfle
Keyword(s):  
Single Mode ◽  
Scattering Loss

scholarly journals Single-Mode Tapered Vertical SU-8 Waveguide Fabricated by E-Beam Lithography for Analyte Sensing

Sensors ◽  
2019 ◽  
Vol 19 (15) ◽  
pp. 3383 ◽  
Author(s):  
Yu Xin ◽  
Gregory Pandraud ◽  
Yongmeng Zhang ◽  
Paddy French
Keyword(s):  
Transmission Loss ◽  
Coupling Efficiency ◽  
Single Mode ◽  
Optical Measurements ◽  
Direct Writing ◽  
Sidewall Roughness ◽  
Scattering Loss ◽  
Waveguide Loss ◽  
One Step ◽  
Saline Solutions

In this paper, we propose a novel vertical SU-8 waveguide for evanescent analyte sensing. The waveguide is designed to possess a vertical and narrow structure to generate evanescent waves on both sides of the waveguide’s surface, aimed at increasing the sensitivity by enlarging the sensing areas. We performed simulations to monitor the influence of different parameters on the waveguide’s performance, including its height and width. E-beam lithography was used to fabricate the structure, as this one-step direct writing process enables easy, fast, and high-resolution fabrication. Furthermore, it reduces the sidewall roughness and decreases the induced scattering loss, which is a major source of waveguide loss. Couplers were added to improve the coupling efficiency and alignment tolerance, and will contribute to the feasibility of a plug-and-play optical system. Optical measurements show that the transmission loss is 1.03 ± 0.19 dB/cm. The absorption sensitivity was measured to be 4.8 dB per refractive index unit (dB/RIU) for saline solutions with various concentrations.

Analysis and Application of the Transmission Spectrum of a Composite Optical Waveguide

2002 ◽  
Vol 56 (9) ◽  
pp. 1222-1227 ◽  
Author(s):  
Zhi-Mei Qi ◽  
Naoki Matsuda ◽  
Akiko Takatsu ◽  
Kenji Kato ◽  
Kiminori Itoh
Keyword(s):  
Optical Waveguide ◽  
Transmission Spectrum ◽  
Single Mode ◽  
Surface Scattering ◽  
Xenon Lamp ◽  
Charge Coupled Device ◽  
Scattering Loss ◽  
Strong Polarization ◽  
Guided Mode ◽  
A Charge

A composite optical waveguide (OWG) was fabricated by use of the masked sputtering method to deposit a tapered TiO2 film onto a single-mode potassium ion-exchanged (PIE) planar waveguide. Using the slab OWG spectroscopy apparatus, including a xenon lamp and a charge-coupled device (CCD) spectrometer, transmission spectra of the composite OWG with different superstrates were measured in the wavelength range 400 to 900 nm. The findings show that the composite OWG transmission spectrum is sensitive to the refractive index of the liquid overlaid on the TiO2 film. The sensing mechanism is considered to be the liquid-index-induced change in surface-scattering loss for the guided mode coupled adiabatically from the PIE layer into the TiO2 film. The composite OWG transmission spectrum and its response to liquid index exhibit strong polarization dependence due to large differences in properties between the TE0 and TM0 modes in the TiO2 film. The composite OWG transmission spectroscopy as a new refractometry was analyzed experimentally and theoretically.

Scattering loss in single-mode fibers by outside process

1983 ◽  
Author(s):  
V. A. Bhagavatula ◽  
G. E. Berkey ◽  
A. Sarkar
Keyword(s):  
Single Mode ◽  
Scattering Loss

scholarly journals Low Effective Material Loss TOPAS Based Single-Mode Photonic Crystal Fiber with High Core Power Fraction in the THz Waveguiding

2021 ◽  
Author(s):  
Selim Hossain ◽  
Shuvo Sen
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Single Mode ◽  
Effective Area ◽  
Confinement Loss ◽  
Long Distance ◽  
Material Loss ◽  
Scattering Loss ◽  
Crystal Fiber ◽  
Different Types

Abstract In this study, five layers of hexagonal cladding and two elliptical air holes based on photonic crystal fiber are discussed highly for many communication areas by decreasing different types of losses such as effective material loss (EML), scattering loss, and confinement loss in the terahertz (THz) waveguiding. Our suggested fiber (H-PCF) and all simulation results are obtained with the finite element method (FEM) and the perfectly matched layer (PML) boundary conditions based COMSOL Multiphysics software have been used to design in the THz region. After investigating all the graphical results, this optical communication-related H-PCF fiber discloses an extremely low effective material loss (EML) of 0.0184 cm−1, with an effective area of 7.07×10-8 m2 and flow of power in the core region of 88% at 1 terahertz (THz). Here, other simulation parameters such as confinement loss, scattering loss, and V-parameter are also presented with a proper graph. So, we can easily say that the reported H-PCF fiber is strongly appropriate for different types of short and long-distance communication applications in the terahertz (THz) wave pulse region.

Scattering loss vs polarization holding ability of single-mode fibers

1984 ◽  
Vol 23 (8) ◽  
pp. 1131_1 ◽  
Author(s):  
W. Eickhoff ◽  
E. Brinkmeyer
Keyword(s):  
Single Mode ◽  
Scattering Loss
Sign in / Sign up

Export Citation Format

Share Document