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  • Pound-Drever Hall Technique for Laser Frequency Stabilization
    Article - 12 May 2014
    The Pound-Drever Hall (PDH) method is a known and sophisticated method for frequency stabilization of lasers, for instance diode lasers, to a reference optical cavity, for instance Fabry-Perot cavity,...
  • Füchtbauer–Ladenburg Equation
    Article - 15 May 2014
    Füchtbauer–Ladenburg equation is used for calculating the stimulated emission cross-sections of the laser gain medium.
  • What is a Photon Detector?
    Article - 22 Apr 2014
    Photon or Quantum detectors generate a single response element for a single photon in response to the incoming photon flux. They respond in a quantized manner. Insufficiencies of response need to be...
  • Plano-Convex Lens - Equation and Explanation
    Article - 29 May 2014
    A plano-convex lens is a convergent lens with one flat surface and one convex surface. It focuses parallel light rays to a positive focal point to form real images that can be manipulated using...
  • Speckle Pattern - Introduction and Applications
    Article - 15 May 2014
    Speckle pattern is a random granular pattern produced by the reflection of coherent light beam e.g. laser, at a rough surface such as a metallic surface, a display screen, white paint or a piece of...
  • Moiré Pattern - Description and Applications
    Article - 15 May 2014
    Moiré patterns occur when materials are overlapped with repetitive lines. It is a naturally occurring interference pattern created by overlaying similar but slightly offset templates.
  • Amici Prism - Definition and Applications
    Article - 6 May 2014
    Dispersive prism is a type of optical prism that divides the incident light into different colors of the electromagnetic spectrum.
  • NASA's Kepler Space Telescope to Begin New Missions?
    Article - 16 Aug 2013
    Since its launch in 2009, the $600m Kepler Telescope has successfully accomplished its initial objectives of identifying new potentially habitable planets far away from Earth. But now after a couple...
  • Optical Atomic Clock Could Provide More Accurate Definition of a Second
    Article - 10 Jul 2013
    An international research team led by the Paris Observatory has developed an optical atomic clock based on strontium.
  • What is a Diffraction Grating?
    Article - 18 Jun 2013
    Diffraction grating comes into the picture when there is a need for separate light of different wavelengths with high resolution. A diffraction grating is a multiple slit arrangement made by etching...

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