Print ISSN: 1681-6900

Online ISSN: 2412-0758

Keywords : Laser

Design and Implementation of an Interface Unit Communicated by a Laser System Within Wireless Sensor Network

Azzad Bader Saeed; Aied K. AL-Samarrie; Hanan A. R. Akkar

Engineering and Technology Journal, 2016, Volume 34, Issue 13, Pages 2507-2517

In this paper, an interface unit had been designed and implemented for a wireless sensor network, which used for adapting the sensor output with input of the artificial intelligent system using an electronic control circuit, in conjunction with a Laser communication system.
The proposed unit had used a new technique of analog-to-digital conversion based on a pulse period coding system, which had made the transferring of data and key signals between the interface unit and the intelligent system device more efficient, easer, and faster.
The pulse period coding system had used a new technique of coding , it constructed from two parts, they are: The first is the pulse period coder part, which converts the characters to pulses with specific periods, and the second is the pulse period decoder part, which converts these pulses to binary data.
This system had been simulated and tested using Multisim software package, and one can see that simulation results approach to the theoretical results, so for this reason, this system possesses acceptable design and performance.

Innovative Technique for Meeting Laser Tracking Criteria at Near and Far Ranges

Nahla A. AL Jabbar; Hisham A. Maliek; Dhafir Aziz Dhadir

Engineering and Technology Journal, 2015, Volume 33, Issue 5, Pages 932-937

Designing Laser Detection and Tracking System (LDTS) needs meeting some certain requirements, one of these requirements is meeting tracking criteria for quadrant photodetector (QPD) at near and far detection range for the target in question through simulating these requirements. A reflecting truncated tetrahedral prism technique design and four separate photodetectors of certain shapes are introduced as a method to avoid tracking failure case.

Study effect of using electric field and low pressure on laser drilling process

Engineering and Technology Journal, 2009, Volume 27, Issue 4, Pages 144-156

In this work, the effect of electric field at low pressure (10-2m bar) on laser drilling
process has been studied for Stainless-Steel type (304) and brasses.
Nd: YAG pulsed laser (1.06μm) of (300μs) pulse duration at various energy ranges
between 0.5and 3J was used. The results indicated that the obtained maximum aspect
ratio for St. St. equals to (49%) at maximum used Energy. However the obtained
maximum aspect ratio for brass is (36.6%).

A Study On The Effect of Using Various Reflectivities of Output Couplers on CW Carbon Dioxide Laser Performance

Engineering and Technology Journal, 2007, Volume 25, Issue 10, Pages 333-336

A practical study has been carried out on axial flow CW CO2 laser by
changing the output coupler with a wide range of reflectivities. ZnSe mirrors
were used in various reflectivities (20, 30, 40, 45, 50, 55, 60, 65, 70,75,80,85,90).
It has been found that the output power varies considerably with varies the
reflectivity of the output coupler. Thus the optimum reflectivity for 1m
optical length and 1cm discharge tube of CW CO2 laser is found to be 65±
5%. Our results have been compared with other published data.