Source: optoelectronics.eecs.berkeley.edu Understanding Photonic Crystals What are Photonic Crystals? Photonic crystals are optical materials with a periodic nanostructure that alters the refractive index at the scale of the optical wavelength. These structures can create unique optical properties, such as complete photonic band gaps, which are crucial for various applications in photonics. Analogy with Electrons in […]
Source: B.Halle The Berek Compensator: A Versatile Tool for Tunable Phase Retardation Overview of Berek Compensator A Berek compensator, named after German physicist Max Berek, is a type of tunable phase retardation plate. Also known as a Berek waveplate or Berek tunable retarder, it is made of a single uniaxial birefringent crystal with its extraordinary
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Source: ResearchGate Understanding Photodetector Responsivity The Concept of Responsivity in Photodetectors The responsivity of a photodetector is a crucial parameter that defines its sensitivity to incident light. It is the ratio of the generated photocurrent to the incident optical power, measured in the linear response range. Calculating Responsivity The responsivity (R) can be calculated using
Source: Nova Photonics Understanding Lyot Filters: An Insight into Optical Filtering Understanding Lyot Filters: An Insight into Optical Filtering Optical filters are essential components in various optical systems, enabling the selective transmission of light based on wavelength. Among these, the Lyot filter is a notable type, recognized for its ability to provide precise wavelength filtering
Source: Wikipedia Understanding Wavelength in Optics and Photonics Definition and Basics Wavelength is a fundamental concept in optics and photonics, describing the spatial period of a wave. It is defined as the distance between two consecutive maxima of a wave. Wavelength is inversely related to frequency, with shorter wavelengths corresponding to higher frequencies. Relation to
Source: Fosco Connect Tutorial: Fiber Amplifiers Understanding Multi-stage Fiber Amplifiers Introduction Multi-stage fiber amplifiers are setups containing multiple active fibers and are used for various reasons in fiber amplifier systems. Need for Different Mode Areas In fiber amplifier systems, different parts of the active fibers experience varying optical powers or pulse energies. Large mode areas
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Source: ResearchGate Understanding Parametric Fluorescence in Optical Parametric Amplifiers An optical parametric amplifier can exhibit parametric fluorescence, which is the emission of light even in the absence of a signal and idler input. This phenomenon, rooted in quantum mechanics, is caused by vacuum fluctuations of the optical field entering the device’s open input ports. In
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Source: MDPI Understanding Composite Laser Crystals What are Composite Laser Crystals? Composite laser crystals, also known as hybrid laser crystals, are created by combining different parts of laser crystals. This combination can involve parts with and without a laser-active dopant or with varying dopant concentrations. The aim is to achieve specific advantages in laser design
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Source: Vik’s Newsletter The Concept of Pulse Chirp in Photonics Understanding Pulse Chirp The temporal chirp of a light pulse refers to the variation in its instantaneous frequency over time. An up-chirp indicates a rise in frequency, while a down-chirp denotes a decrease. Causes of Pulse Chirp Chirps can occur due to effects like chromatic
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Source: Laserworld Understanding Slave Lasers in Photonics The Concept of Slave Lasers in Photonics A slave laser is a type of laser that emits light at an optical frequency determined by an external master laser, also known as a seed laser, through a process called injection locking. The seed laser is typically a low-noise, single-frequency
