PPT-INTRODUCTION Tunable lasers are different to traditional lasers because they can continuously

or color in a given spectral range As such these quantum devices have found numerous applications in many diverse fields In particular tunable lasers have played a crucial and sustained role in advancements of fundamental physics and science. Tim Day, New FocusAt the recent Photonics West and Optical Fiber Conferences, compa-nies presented many new products, ranging from mechanical products to instruments to complex laser sys-tems. As a pr Usually . electrical to optical converters. 1.Continuum . sources. a. . Incandescent. . sources. Blackbody. . sources. Tungsten . filament. . sources. b. ASE (. EDFAs. ). c. . LEDs. 2. Sources of line spectra. P. rof. Dr. . Salah. I. . Hassab. . Elnaby. NILES. LASER PHYSICS I. Prof. Dr. . Salah. Ibrahim . Hassab. . Elnaby. 12 lectures . 4 . homeworks. 20. Report 10. , . G. Yu. Kryuchkyan*, . A. Ipp, J. Evers. . and C. H. Keitel. Max-Planck-Institut für Kernphysik, Heidelberg, Germany. *Yerevan State University, Yerevan , Armenia. "PW Lasers at Hard X-ray Sources" Dresden-Rossendorf, 7 Sep 2011. Based on Dissipative Processes. F. W. Wise. Department of Applied Physics. Cornell University. Andy Chong. Will Renninger. Khanh Kieu. Simon Lefrancois. Hannah Liu. Brandon Bale. Edwin Ding. Nathan Kutz. Smaller than a bird, . . . as . fast as . light, . . . bright . as the sun. What is a laser? . The acronym is also the definition - . L. ight . A. mplification by . S. timulated . E. mission of . The tunable laser could be set to any desired wavelength either in the factory or in the field by a software command.. The performance parameters are:. Power. Spurious mode suppression. Wavelength stability. stemler. , Andy . Barrus. , Sean . Osinski. Overview. Definition of laser and operation. Quantitative description of laser. Various types of lasers and applications.. Laser—Light Amplification by Stimulated Emission of Radiation. He-Ne Laser. Laser Types. According to the . active material. : . solid-state, liquid, gas, . excimer. or semiconductor lasers. .. Gas: . HeNe. laser, . excimer. lasers, CO. 2. lasers. Liquid:. Laura Corner. Cockcroft Institute for Accelerator Science. Liverpool University, UK. CERN Accelerator School. High Gradient Wakefield Accelerators. Sesimbra. , Portugal, March 2019. 2. Outline. What is a laser?. Bianca . Cilento. What is a laser?. A laser is a device that emits light through the process of stimulated emission. LASER is actually an acronym for Light Amplification by the Stimulated Emission of Radiation. . the active medium is glass denatured by Neodymium ions(Nd +3) (active ions) with doping rate up to (6%). The color of the crystal is purple (8). dimensions of the crystal are from a few microns to (2 cm) length and the diameter (6-10 m). The Pumping using the flash lamp). with an efficiency not exceeding (1.5%) or using a semiconductor laser with an efficiency of up to (70%). It works with a system of quadrupole levels and it dose need good cooling. Laser safety Retraining. Laser safety at Purdue University is managed by the Laser Safety Officer (LSO) and Radiological and Environmental Management (REM). Purdue’s laser safety program is overseen by the Laser Safety Committee (LSC). Cryotherapy is the local or general use of low temperatures in medical therapy. Cryotherapy is used to treat a variety of benign and malignant lesions. The term "cryotherapy" comes from the Greek . cryo.