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Iraqi Journal of Applied Physics

المجلة العراقية للفيزياء التطبيقية

ISSN: 18132065 23091673
Publisher: iraqi society for alternative and renewable energy sources and techniques
Faculty:
Language: English

This journal is Open Access

About

The Iraqi Journal of Applied Physics (IJAP) is a peer reviewed journal of high quality devoted to the publication of original research papers from applied physics and their broad range of applications. IJAP publishes quality original research papers, comprehensive review articles, survey articles, book reviews, dissertation abstracts in physics and its applications in the broadest sense. It is intended that the journal may act as an interdisciplinary forum for Physics and its applications. Innovative applications and material that brings together diverse areas of Physics are particularly welcome. Review articles in selected areas are published from time to time. It aims to disseminate knowledge; provide a learned reference in the field; and establish channels of communication between academic and research experts, policy makers and executives in industry, commerce and investment institutions. IJAP is a quarterly specialized periodical dedicated to publishing original papers, letters and reviews in: Applied & Nonlinear Optics, Applied Mechanics & Thermodynamics, Digital & Optical Communications, Electronic Materials & Devices, Laser Physics & Applications, Plasma Physics & Applications, Quantum Physics & Spectroscopy, Semiconductors & Optoelectronics, Solid State Physics & Applications, Alternative and Renewable Energy, Computers Networks and Applications.

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Contact info

P. O. Box 55259,
Baghdad 12001,
Iraq
Website: www.iraqiphysicsjournal.com
Email: admin@iraqiphysicsjournal.com
Email: editor_ijap@yahoo.co.uk

Table of content: 2006 volume:2 issue:3-4

Article
Accurate Relative Frequency Cancellation Between Two Independent Lasers

Authors: M. Korogj
Pages: 3-5
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Abstract

For high-precision frequency-based applications of lasers, the frequency difference between two independent lasers is accurately stabilized and maintained. We describe a simple and novel feed-forward method with an acousto-optic modulator. This method can be used in optical phase-locked loops.


Article
Continuous-Wave Broadly Tunable Cr2+:ZnSe Laser

Authors: G.J. Wagner
Pages: 6-8
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Abstract

We report room-temperature operation of an all-solid-state broadly tunable continuous-wave Cr2+:ZnSe laser. Output power of 250mW, an absorbed power slope efficiency of 63%, and continuous tunability from 2138 to 2760 nm are demonstrated.


Article
Dispersion Compensation for a Femtosecond Self-Pumped Phase Conjugator

Authors: C.X. Yang
Pages: 9-11
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Abstract

Dispersion compensation for a photorefractive self-pumped phase conjugator with femtosecond pulses is analyzed. The self-pumped phase conjugator consists of a pair of dynamic gratings coupled by total internal ref lections at the crystal surfaces (cat conjugator). The negative angular dispersions of refraction at the air–crystal interface and the gratings inside the crystal compensate for the positive dispersion of the finite crystal path. The experimental results show that with partial dispersion compensation the width of the self-pumped phase conjugation at 450 nm of femtosecond pulses is narrower than that of the transmitted pulses.


Article
Effect of Dissipative Forces on the Theory of a Single-Atom Microlaser

Authors: N. Najak
Pages: 12-14
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Abstract

A single-atom microlaser involving Poissonian input of atoms with a fixed f light time through an optical resonator is described. The influence of the cavity reservoir during the interactions of successive individual atoms with the cavity field is included in the analysis. Atomic decay is also considered, as it is nonnegligible in the optical regime. During the random intervals of absence of any atom in the cavity, the field evolves under its own dynamics. The steady-state characteristics of the cavity field are discussed. Away from laser threshold, the field can be nonclassical in nature.


Article
Generation of Intense 8-fs Pulses at 400 nm

Authors: O. Duhhr
Pages: 15-17
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Abstract

Frequency-doubled pulses from a sub-40-fs, 1-kHz Ti:sapphire amplifier system are spectrally broadened in an argon-filled hollow waveguide. Compression of the self-phase-modulated pulses is implemented with chirped mirrors and a prism pair, yielding 8-fs, 15-mJ pulses in the violet spectral range.


Article
High-Intensity Third-Harmonic Generation in Beta Barium Borate Through Second-Order and Third-Order Susceptibilities

Authors: P.S. Banmks
Pages: 18-20
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Abstract

The azimuthal dependence of third-order and cascaded second-order nonlinear coupling was used to measure the relative contributions of each to direct third-harmonic generation in b-barium borate. This permitted the measurement of the values of tensor elements , and relative to the known . Finally, conversion efficiencies to 3 of up to 6% were achieved with a femtosecond chirped-pulse amplification laser with 200 GW/cm2 in collimated beams.


Article
Phase Conjugation with Random Fields and with Deterministic and Random Scatterers

Authors: G. Gbuur
Pages: 21-23
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Abstract

The theory of distortion correction by phase conjugation, developed since the discovery of this phenomenon many years ago, applies to situations when the field that is conjugated is monochromatic and the medium with which it interacts is deterministic. In this Letter a generalization of the theory is presented that applies to phase conjugation of partially coherent waves interacting with either deterministic or random weakly scattering nonabsorbing media.


Article
Generation of Femtosecond Pulses from Order-of-Magnitude Pulse Compression in a Synchronously Pumped Optical Parametric Oscillator Based on Periodically Poled Lithium Niobate

Authors: L. Liforte
Pages: 24-26
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Abstract

We demonstrate the generation of compressed, transform-limited 250-fs pulses, tunable in the near infrared, by means of synchronously pumped optical parametric oscillation in periodically poled lithium niobate. The almost 20-fold compression from the 4-ps pulse duration of the cw mode-locked Nd:YLF pump results in signal peak powers well in excess of the pump power.

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