Iraqi Journal of Laser

Fluorescence excitation by Nd:YAG pumped dye laser and single vibrational level fluorescencespectra of 1,3 benzodioxole in a supersonic jet have been obtained and interpreted. The previous assignment ofthe000band was incorrect. In addition, many other bands involvingν20 andν19 vibrations of a2 symmetry wereconfirmed. As far as a1 totally symmetric vibration is concerned. Theν14 was assigned to be located in the five-membered ring whereasν13 seem to be located in the benzene ring as a result of the electronic transition in thebenzene ring which affectsν13 and notν14 wavenumber.

he aim of this research is to design and construct a semiconductor laser range finderoperating in the near infrared range for ranging and designation. The main part of the range finder is thetransmitter which is a semiconductor laser type GaAs of 0.904μm wavelength with a beam expander,and the receiver with its collecting optics. The characteristics of transmitter pulse width were 200ns andthreshold current 10 Amp. and maximum operating current 38 Amp. The repetition rate was set at 660 Hzand maximum output power about 1 watt. The divergence of the beam was 0.268o. A special computercode was used for optimum optical design and laser spot size analysis and for calculation of atmosphereattenuation

Obliquely deposited (70o) Bi, Sb, and Bi-Sb alloy thin films have been prepared by thermalresistive technique. Structural properties of these films were studied using XRD. Their resistance andvoltage responsivity for Nd:YAG and CO2 laser pulses have been recorded as function of operatingtemperature between 10oC and 120oC. It was found that the maximum responsivity for these detectorscan be obtained at 75oC. On the other hand, the dependence of responsivity on the width of detectors wasinvestigated

In this article, a short review on the feature of reality and locality in quantum optics is given.The Bell inequality and the Bell states are introduced to show their direct use in quantum computer andquantum teleportation. Moreover, quantum cryptography is discussed in some details regarding basicideas and practical considerations. In addition, a case study involving distillation of a quantum key basedon the given fundamentals is presented and discussed