Source: Wikipedia Laser Lines Explained The Science Behind Laser Lines Understanding Laser Spectral Lines Many lasers emit light within narrow wavelength regions known as spectral lines. These lines are determined by laser transitions in the gain medium, resulting in a specific optical spectrum. Laser Linewidth and Bandwidth The linewidth of a laser refers to the […]
Source: MDPI Gaussian Pulses Gaussian Pulses Overview Gaussian pulses are a common temporal shape of ultrashort pulses generated by mode-locked lasers. They are often described by a Gaussian function, with a peak power related to the pulse energy and duration. Characteristics of Gaussian Pulses Gaussian pulses typically have a symmetric shape with a bell curve
Source: Wikipedia Spectral Brightness in Photonics Spectral Brightness in Photonics Understanding Spectral Brightness Spectral brightness, often associated with laser beams, refers to the brightness per unit optical bandwidth. Specifically, it represents the spectral radiance, measured in units of W/(sr cm2 Hz). There are various definitions of spectral brightness, such as normalizing bandwidth relative to the
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Source: YouTube Gires–Tournois Interferometer: Understanding Chromatic Dispersion Gires–Tournois Interferometer: Understanding Chromatic Dispersion Introduction A Gires–Tournois interferometer (GTI) is an optical device used to induce chromatic dispersion. It operates on the principle of optical interference within a resonant cavity. This article explores the working principles and applications of GTIs. Working Principle A GTI consists of two
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Source: HighFinesse Understanding Laser Noise: Origins, Impacts, and Reduction Strategies Understanding Laser Noise: Origins, Impacts, and Reduction Strategies Lasers are integral to numerous technological applications, yet they are not immune to noise. This noise can affect the performance and reliability of laser-dependent systems. In this blog post, we will explore the different types of laser
Source: ResearchGate Understanding Detectivity in Photodetectors Understanding Detectivity in Photodetectors In the realm of photonics, photodetectors play a crucial role in sensing and measuring light. A key performance metric for these devices is detectivity, which determines their ability to detect weak signals in the presence of noise. This article delves into the concept of detectivity,
Source: Wikipedia The Duration of Light Pulses Light pulses, also known as pulse width or pulse length, can vary significantly in duration depending on the method of generation: – Modulating a continuous-wave light source can produce pulses ranging from tens of picoseconds to high values. – Gain switching of laser diodes can lead to pulses
Source: SlidePlayer Bandwidth-Limited Light Pulses Understanding Bandwidth-Limited Light Pulses What are Bandwidth-Limited Pulses? A bandwidth-limited light pulse, also known as a transform-limited pulse, is a pulse that is as short as its spectral bandwidth allows. In simpler terms, it means that the pulse duration is minimized based on its spectral characteristics. Time-Bandwidth Product The time–bandwidth
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Source: ResearchGate Understanding Noise-Equivalent Power in Photodetectors Understanding Noise-Equivalent Power in Photodetectors Introduction to Noise-Equivalent Power (NEP) In the realm of photodetectors, noise-equivalent power (NEP) is a key parameter that defines the sensitivity of a device. It represents the optical input power required to produce an output power equivalent to the inherent noise power of
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Source: Yana Dobreva – yekomod Monochromatic Light Understanding Monochromatic Light What is Monochromatic Light? Monochromatic light refers to light that contains only a single optical frequency, resulting in a pure sinusoidal oscillation with a constant frequency and zero bandwidth. Light sources emitting such light are also termed monochromatic. Monochromatic vs. Polychromatic Light In contrast to
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