Low Loss in a Gas Filled Hollow Core Photonic crystal fiber

Hanan J.  Taher

doi:10.21123/bsj.2010.7.1.129-138

Details

Publication Date

Sun Mar 07 2010

Journal Name

Baghdad Science Journal

Volume

7

Issue Number

1

DOI

10.21123/bsj.2010.7.1.129-138

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Low Loss in a Gas Filled Hollow Core Photonic crystal fiber

"Photonic crystal

microstructure fabrication

optical fibers"

Hanan J. Taher

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The work in this paper focuses on the experimental confirming of the losses in photonic crystal fibers (PCF) on the transmission of Q-switched Nd:YAG laser. First HC-PCF was evacuated to 0.1 mbar then the microstructure fiber (PCF) was filled with He gas & gas. Second the input power and output power of Q-switched Nd:YAG laser was measured in hollow core photonic bandgap fiber (HCPCF). In this work loss was calculated in the hollow core photonic crystal fiber (HCPCF) filled with air then N2, and He gases respectively. It has bean observed that the minimum loss obtained in case of filling (HC-PCF) with He gas and its equal to 15.070 dB/km at operating wavelength (1040-1090) nm.

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Publication Date

Tue May 15 2018

Pre‐low noise amplifier (LNA) filtering linearisation method for low‐power ultra‐wideband complementary metal oxide semiconductor LNA

Mohammed Nadhim

Farooq Abdulghafoor

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(3)

Publication Date

Sat Apr 01 2023

Journal Name

Chemical Methodologies

A Novel Design for Gas Sensor of Zinc Oxide Nanostructure Prepared by Hydrothermal Annealing Technique

A.E.

Fuad Tariq

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(13)

Publication Date

Tue Nov 09 2021

Journal Name

Abu Dhabi International Petroleum Exhibition & Conference

Numerical Simulation of Gas Lift Optimization Using Artificial Intelligence for a Middle Eastern Oil Field

evolutionary algorithm

gas lift

artificial intelligence

upstream oil & gas

machine learning

optimization problem

correlation

presented

allocation

reservoir pressure

Mohammed Ahmed

Omar F.

Dhifaf Jaafar

Haider Abdulmuhsin

Mustafa Alaulddin

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Abstract<p>Artificial lift techniques are a highly effective solution to aid the deterioration of the production especially for mature oil fields, gas lift is one of the oldest and most applied artificial lift methods especially for large oil fields, the gas that is required for injection is quite scarce and expensive resource, optimally allocating the injection rate in each well is a high importance task and not easily applicable. Conventional methods faced some major problems in solving this problem in a network with large number of wells, multi-constrains, multi-objectives, and limited amount of gas. This paper focuses on utilizing the Genetic Algorithm (GA) as a gas lift optimization algorit</p> ... Show More

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(8)

(5)

Publication Date

Sun Dec 04 2011

Journal Name

Baghdad Science Journal

Development of Embryo Gas Bladder in mosquito fish Gambusia affinis

Mohammed A.

Thgikra A.

Mudhir D.

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2 - 5,5 cm mosquito fishes (Gambusia affinis) were collected from brooks of Baghdad university . This study aimed to identify the histological structure and embryonic development of the gas bladder . The results revealed that the gas bladder of the adult fish consists of single chamber, paraphysoclistous , and its wall consist of three layers. The primordium of the gas bladder appears in 2,5 mm fish embryo as an evagination from the right side of endoderm of foreguts wall. This primordium consists of two thecae, inner, is simple columnar epithelium and outer originates from undifferentiated mesoderm. Simultaneously with the appearance of gas gland in the ventral side of the sac in 4 mm embryo, morphological and histological chan

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Publication Date

Mon Feb 04 2019

Journal Name

Iraqi Journal Of Physics

Spectroscopic measurements of the electron temperature in low pressure microwave 2.45 GHz argon plasma

Microwave plasma

optical emission spectroscopy

plasma parameters.

Mohammed E.

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The main goal of this work is to obtain the plasma electron temperature Te by optical emission spectroscopy of low pressure microwave argon plasma, as a function of working pressure and microwave power. A plasma system was designed and constructed in our laboratory using a magnetron of domestic microwave oven with power 800W without any commercial part. The applied voltage on the magnetron electrical circuit is changed for the purpose of obtaining the variable values of the microwave power. The spectral detection is performed with a spectrometer of wavelength range (200−1000nm). The working pressure and magnetron applied voltage were 0.3-3.0mbar and 180-240V, respectively. Two methods had been applied to estimate the electron temperatu

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(1)

Publication Date

Mon May 01 2023

Journal Name

Chemical Engineering Research And Design

Treatment of petroleum refinery wastewater by electrofenton process using a low cost porous graphite air-diffusion cathode with a novel design

Marwa M.

Ali H.

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(28)

(30)

Publication Date

Wed Mar 30 2022

Journal Name

Iraqi Journal Of Chemical And Petroleum Engineering

The Conductivity of AC, Loss Tangent, and Relative Permittivity for Composites of PVC Paste/Graphite Electrode Waste

Abdullah A. Hussain

Forat Yasir

Feras N. Hasoon

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The behavior of AC conductivity (σ_ac), loss tangent (tan δ), and relative permittivity (ε′) for composites of PVC-P/graphite electrode waste (GEW) was investigated, and a qualitative explanation was provided as a function of PVC-P weight fractions (0, 5, 10, 15, 20, and 25) wt. percent, temperature (30-90) °C, and frequency (100Hz-2MHz). The behaviors of the composites' ac. conductivity and impedance as a frequency function and temperature have been examined. The permittivity was shown to rise with increasing temperature (Tg). The relative permittivity increased as the GEW filler concentration increased and was highest in the low-frequency range; nevertheless decreased as the frequency increased.

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(2)

Publication Date

Tue Jun 01 2021

Journal Name

Baghdad Science Journal

Comparing Weibull Stress – Strength Reliability Bayesian Estimators for Singly Type II Censored Data under Different loss Functions

Weibull Distribution

Stress-Strength Model

Reliability

Bayesian

Estimation

Awatif Rezoky

Nada Sabah

Ghada Sabah

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The stress(Y) – strength(X) model reliability Bayesian estimation which defines life of a component with strength X and stress Y (the component fails if and only if at any time the applied stress is greater than its strength) has been studied, then the reliability; R=P(Y<X), can be considered as a measure of the component performance. In this paper, a Bayesian analysis has been considered for R when the two variables X and Y are independent Weibull random variables with common parameter α in order to study the effect of each of the two different scale parameters β and λ; respectively, using three different [weighted, quadratic and entropy] loss functions under two different prior functions [Gamma and extension of Jeffery

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(3)

Publication Date

Mon Dec 30 2002

Journal Name

Iraqi Journal Of Chemical And Petroleum Engineering

Thermal Conductivity Characteristics of Polymer composites Based on Polyethylene Wastes Filled with Post-Industry Wood Wastes

I.M.

H.A.

B.A.

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Publication Date

Tue Jan 28 2014

Journal Name

Journal Of Energy And Power Engineering

Comparison between Two Vertical Enclosures Filled With Porous Media under the Effect of Radiation and Magnetohydrodynamics

Hussein

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