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Iraqi Journal of Applied Physics Letters

الرسائل العراقية في الفيزياء التطبيقية

ISSN: 1999656X
Publisher: iraqi society for alternative and renewable energy sources and techniques
Language: English

This journal is Open Access


Iraqi Journal of Applied Physics (IJAPLett) is a scientific periodical sponsored and
published by the Iraqi Society for Alternative and Renewable Energy Sources and
Techniques (I.S.A.R.E.S.T.). The Editorial Board is responsible for the scientific content
and other editorial matters relating to the Journal. Manuscripts submitted are first screened
by the editors; those on subject matters within the scope of the IJAPLett are sent to an
expert referee for evaluation and may be sent to a second reviewer if necessary. This
screening process helps to assure an appropriate focus as well as high scientific quality of
the Journal. The IJAPLett welcomes submission of papers and letters in applied physics
and related fields of science, engineering and technology. They should have something in
common with what we now publish on inanimate materials and processes therein:
structures, transport, physical, electrical, dielectric, magnetic, and optical properties. Our
basic criterion stated below will continue to apply: papers must contain science, especially
physics, and there must be an application. We advise authors submitting papers to suggest
the names of at least two possible reviewers, with full information on addresses, phone and
e-mail. Suggestions of reviewers are welcome regardless of the subject.

Contact info

P. O. Box 55259,
Baghdad 12001,

Table of content: 2009 volume:2 issue:2

Effect of Chirping on Received Pulse Shape in Optical Fiber Communications

Authors: A.A.K. Hadi --- H.S. Dawood --- B.A.M. Bader --- R.O. Mahdi
Pages: 7-10

In this work, the effect of chirping on the pulse broadening and wavelength shift in the optical fiber communications was studied. A numerical analysis based on tracing the pulse propagating through an optical fiber was presented to determine the role of chirping in pulse broadening. Consequently, the wavelength shift resulted from the chirping effect was deduced analytically.

Performance Optimization of Multi-Quantum Wells Laser Used in Optical Communications

Authors: S.S. Jasim
Pages: 11-14

In this work, an analytical treatment of some design parameters of multiquantum well semiconductor laser aiming to optimize the performance of such systems is presented. The treatment concentrates on three main parameters; the reflectivity of the front mirror, the effective lifetime of the photon inside laser cavity, and the number of quantum wells in the laser structure. These three parameters relate to several other parameters which impose to achieve design compensation. Such compensation can be simulated by analytical treatments because the characteristics of these lasers have been established well in form of small and large signal solutions. These lasers are increasingly studied due to their characteristic features in optical communications architectures, low-dimensioned photonics and optoelectronics devices.

Optical Properties of Thermally-Annealed Tin-Doped Indium Oxide Thin Films

Authors: A.I. Hasan
Pages: 15-18

In this work, results of thermal annealing of tin-doped indium oxide thin films were presented. The effect of thermal annealing of the optical characteristics of such films was introduced. These characteristics include transmission, absorption coefficient, absorption depth, type of band gap and the dominant absorption processes. Thermal annealing may improve the diffusion of Sn dopants in the In2O3 structure and hence affect the optical properties of the resulted structure. The Sn-doped In2O3 thin films are widely used in the optoelectronics and integrated optics architecture.

Optical Properties of Annealed Cadmium Sulfide Thin Films Prepared by Chemical Bath Deposition

Authors: W.A. Taha --- Z.S. Ahmed --- S.M.H. Aljawad
Pages: 19-22

CdS thin films were prepared by the chemical bath deposition technique. Annealing in air at different temperatures (300, 350, 400, 450, and 500)°C at constant time of 30min, also for different times (15, 30, 45, 60, and 90) min at constant temperature (300°C) is achieved. The CdS films showed, on average, 20% reflectance. The transmittance ranged between 80–92% for the films annealed at 60 and 45 min. On average, the refractive index of the CdS is 1.2 and the band gap is 2.4eV, the wide band gap semiconductor has a wide range of applications in areas including photocells and other photoconductive devices.

Table of content: volume:2 issue:2