Controlling the wavelength of a high power diode laser using thermoelectric cooler

Fareed F. Rasheed

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Publication Date

Tue May 01 2012

Journal Name

Iraqi Journal Of Physics

Volume

10

Issue Number

17

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Controlling the wavelength of a high power diode laser using thermoelectric cooler

Diode laser

Thermoelectric cooler

Fareed F. Rasheed

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The present work includes a design and characteristics study of a controlling the wavelength of high power diode laser by thermoelectric cooler [TEC] . The work includes the operation of the [TEC] to control the temperature of the diode laser between ( 0- +30) °C by changing the resistance of thermistor. We can control a limited temperature of a diode laser by changing the phase cooling between hot and cold faces of the diode, this process can be attempted by comparator type [LM –311] .The theoretical results give a model for controlling the temperature with, the suitable wavelength.

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Publication Date

Tue Oct 25 2022

Journal Name

Aip Conference Proceedings

Consequence of violet laser irradiation on the optical properties of mawsoniteCu6Fe2SnS8 [CFTS] thin films deposited via semi-computerized spray pyrolysis technique

Mushtaq Talib

Bahaa T.

Nathera

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Publication Date

Sun Nov 01 2020

Journal Name

Iop Conference Series: Materials Science And Engineering

Pump-Probe Technique to Study of the All-Optical Switching Properties of Copper Phthalocyanine Thin Film prepared via Pulsed laser deposition

Mohammed T.

Reem R.

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AbstractZ-scan has been utilized for studying the non-linear properties and optical limiting behaviors of the dye Copper Phthalocyanine thin films. The refractive index is negative, which indicates a self-defocusing behavior and non-linear absorption coefficient (<italic>β</italic>) of CuPc is a positive sign is a result of RSA. The optical switching behaviors of dye have been researched with the use of the method of the pump-probe with 9ns Q-Switched Nd: YAG laser at pump beam equal to 532 nm and a probe beam equal to 630nm Diode laser. The thin films of copper Phthalocyanine also reflect a significant limiting of the optical power of CW laser with an adequate threshold of the opt ... Show More

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(1)

Publication Date

Sun Jan 01 2023

Journal Name

Aip Conference Proceedings

Comparison consequence of violet and red laser irradiation on the optical properties of cobalt dioxide (CoO2) thin films prepared via (SCSPT)

Mushtaq Talib

Bahaa T.

Nathera

Mohammed Sh.

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(1)

Publication Date

Fri Jan 01 2021

Journal Name

Aip Conference Proceedings

Comparison effect of violet and red laser irradiation on the structural properties of mawsonite Cu6Fe2SnS8 [CFTS] thin films deposited via (SCSPT)

Mushtaq Talib

Nathera

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Publication Date

Wed Mar 01 2023

Journal Name

Heliyon

The influence of pulse duration and exposure time of Er,Cr:YSGG laser on lithium disilicate laminate debonding, an in vitro study

Sura Sardar

Hussein A.

Tamara

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(11)

Publication Date

Sun Dec 20 2020

Journal Name

International Journal Of Research In Social Sciences And Humanities

THE EFFECT OF MAXIMUM PHYSICAL EXERTION EXERCISES ACCORDING TO THE ANAEROBIC THRESHOLD ON THE DEVELOPMENT OF EXPLOSIVE ABILITY AND THE SKILL OF SHOOTING BY JUMPING HIGH IN FRONT OF HANDBALL FOR YOUTH

Hadeel Talib

Dr. Suhad

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The sports field is one of the fields that are concerned with the various methods and methods because of their positive impact on the development of actual training, the investment of the exerted effort in time, and through the follow-up of the researcher in the field and academic field, I noticed that there is a weakness in explosive ability, which affects performance and skill level during training and competition Therefore, the researcher decided to prepare maximum physical exertion exercises according to the anaerobic threshold as a principle of development in many physical and skill variables because good physical performance leads to reaching the best achievements and since the skill of shooting by jumping high - either constitutes a

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Publication Date

Mon Sep 02 2024

Journal Name

Journal Of The American Oil Chemists' Society

Direct application of tungstosilicic acid hydrate for the treatment of high free fatty acid in acidic crude palm oil and for biodiesel production

Khalid M.

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AbstractThis study explored the use of industrial acidic crude palm oil (ACPO) for biodiesel production, facing a significant obstacle due to its high free fatty acid (FFA) content, which complicates the biodiesel production process. Typically, esterification is employed to convert FFAs into fatty acid methyl ester (FAME). Herein, the effectiveness of tungstosilicic acid hydrate (TSAH) as an unsupported heteropoly acid (HPA) catalyst for FFA esterification in ACPO was investigated. The FFA content was reduced from 8.43% to 0.95% under optimum conditions (4 wt% catalyst dosage, a methanol to oil molar ratio of 10:1, 150 min and a temperature of 60°C). Noteworthy, the TSAH catalyst showed stability over 7 ... Show More

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(3)

Publication Date

Sun Dec 01 2002

Journal Name

Iraqi Journal Of Physics

Preparation of thin films of SiCN from gas-phase reaction induced by TEA-CO2 laser and study of their optical properties

laser

Magda Ali

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In this paper, silicon carbonitried thin films were prepared by the method of photolysis of the silane (SiH4) and ethylene (C2H4) gases, with and without ammonia gas (NH3), which is represented by the ratio between the (PNH3) and (PSiH4 + PC2H4 + PNH3), (which assign by the letter X), X has the values (0, 0.13, 0.33). This method carried out by using TEA-CO2 laser, on glass substrate at (375 oC), deposition rate (0.416-0.833) nm/pulse thin film thickness of (500-1000) nm. The optical properties of the films were studied by using Absorbance and Transmittance spectrums in wavelength range of (400-1100) nm, the results showed that the electronic transitions is indirect and the energy gap for the SiCN films increase with increasing of nitrog

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Publication Date

Sun Mar 04 2012

Journal Name

Baghdad Science Journal

Phase transformation study of Iraqi Bentonite with Al2O3 and MgO as additions at high temperatures

Tariq Abdul-Ridha

Fadhel abed

Shatha Hashim

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Iraqi bentonite is used as main material for preparing ceramic samples with the additions of alumina and magnesia. X-ray diffractions analyses were carried out for the raw material at room temperature. The sequence of mineral phase's transformations of the bentonite for temperatures 1000 ,1100 ,1200 and 1250 ºC reflects that it finally transformed in to mullite 39.18% and cristobalite 62.82%. Samples of different weight constituent were prepared. The effect of its constitutional change reveals through its heat treatments at 1000,1100,1200,1250and 1300ºC .The samples of additions less than 15% of alumina and magnesia could not stand up to 1300ºC while the samples of addition more than 15% are stable .That is shown by analy

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Publication Date

Mon Mar 01 2021

Journal Name

Journal Of Physics: Conference Series

High pollutant levels of produced water around Al-Ahdab oil field in Wasit governorate (Iraq)

Heavy Metals (Cd

Co

Cr

Pd

and Ni)

Al-Ahdab oilfield in Wasit

Iraq

the Main Outfall Drain (MOD)

produced water (PW)

inductively couple plasma (ICP-OES)

N M

Khalid Waleed S

S A

Z S.

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AbstractExploration activities of the oil and gas industry generate loads of formation water called produced water (PW) up to thousands of tons each day. Depending on the geographic area, formation depth, oil production techniques, and age of oil supply wells, PW from different oil fields contain different chemical compositions. Currently, PW is also known as industrial waste water containing heavy metals that are toxic to humans and the environment, requiring special processing so that they can be disposed of in the environment. To determine the heavy metals content in PW from the Al-Ahdab oil field (AOF), the Ministry of Science and Technology/Agricultural Research Department determined som ... Show More

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