"Laser" Essays and Research Papers

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  • Microcavity in Photonic Crystals

    based on optical microcavities are already indispensable for a wide range of applications and studies. For example‚ microcavities made of active III–V semiconductor materials control laser emission spectra to enable long-distance transmission of data over optical fibres; they also ensure narrow spot-size laser read/write beams in CD and DVD players. In quantum optical devices‚ microcavities can coax atoms or quantum dots to emit spontaneous photons in a desired direction or can provide an environment

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  • Technology - Quiz

    Question: Some lasers are referred to as being “cw.” What does “cw” mean? 1) Circular wave  2) Constant white  3) Continuous wave  4) Clear white Science Quiz‚ Technology Quiz Question: What is the process responsible for producing photons in a diode laser? 1) Fermi level shift  2) Majority carrier injection  3) Carrier freeze out  4) Electron-hole recombination Science Quiz‚ Technology Quiz Question: What are three types of lasers? 1) Gas‚ metal vapor‚ rock  2) Pointer‚ diode‚

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  • Lab Report

    of shadow. When waves are superposed‚ they reinforce each other when crests are in phase and cancel out when they are not in phase. An image projected by light waves shows this by producing concentric circles of light. When slits are used‚ the laser superposes itself and creates constructive interference. The resulting spots are measured to give data that allows one to find the wavelength using the equation λm = dsin θ. These diffraction and interference with such slits was successful

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  • Engineering Design

    TITLE- AUTOMATION IN CONSTRUCTION INDUSTRY REPORT ON: (a) List the Major Equipments Used In Construction Work 1) Conventional 2) Semi Automatic 3) Fully Automatic OR Robotics (b) Identify the automation at different stages of construction. WHAT DOES AUTOMATION MEAN? ► The term automation refers to the phenomenon where a job is performed without the help of any human interference. ► Automation means performing a particular task with the help of machines

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  • How Optical Storage Works

    incredibly inexpensive to manufacture. The design that makes this possible is a simple one: The CD surface is a mirror covered with billions of tiny bumps that are arranged in a long‚ tightly wound spiral. The CD player reads the bumps with a precise laser and interprets the information as bits of data. The spiral of bumps on a CD starts in the centre. CD tracks are so small that they have to be measured in microns (millionths of a meter). The CD track is approximately 0.5 microns wide‚ with 1.6 microns

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  • Lasik surgery

    Rangaswamy Srinivisan discovered that an ultraviolet excimer laser could each living tissue‚with precision and with no thernal damage to the surrounding area.Five years later‚ Steven Trokel published his work using the exicimer laser in radial keratotomy with his colleagues performed the first human VISX regractive laser eye surger. LASIK stands for Laser-Ssisted in situ Keratamileusis commonly referred to as laser eye surgery or laser vision correction.The procedure involves creating a thin flap

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  • Holographic Data Storage

    CERTIFICATE OF APPROVAL This is to certify that the Seminar titled HOLOGRAPHIC DATA STORAGE Submitted by Nikhil Puthran 100942 Rahulsing Rajput 100944 Pravish Shetty 100954 Suraj Yadav 100962 In partial fulfillment of requirement for the term work of third year in Computer engineering is approved. EXTERNAL EXAMINER INTERNAL EXAMINER __________________ ___________________ HEAD OF THE DEPARTMENT INTERNAL GUIDE _____________________

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  • Optical Fibre

    it to an electrical signal. An optical amplifier may be thought of as a laser without an optical cavity‚ or one in which feedback from the cavity is suppressed. Optical amplifiers are important in optical communication and laser physics. There are several different physical mechanisms that can be used to amplify a light signal‚ which correspond to the major types of optical amplifiers. In doped fiber amplifiers and bulk lasers‚ stimulated emission in the amplifier’s gain medium causes amplification

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  • Adamac Inc

    Adamac must be conscious of their internal strengths to ensure they are able to maintain their position in the industry. A SWOT analysis can be viewed in Exhibit 1. Adamac currently has over 70 clients and is operating at full capacity. Adamacs’ laser cutter machine broke down 6 times last year‚ and the water jet machine broke down 5 times. The total cost of outsourcing this work was $10‚500‚ the cost breakdown can be view in Exhibit 2. Quality control of their product is a

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  • fiber optic communication

    FIBER-OPTIC COMMUNICATION Introduction Fiber-optic communication is a method of transmitting information from one place to another by sending pulses of light through an optical fiber. The light forms an electromagnetic waves that is modulated to carry information. First developed in the 1970s‚ fiber-optic communication system have revolutionized the telecommunication industry and have played a major role in the advent of the information over age. Because of its advantages over electrical

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