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: 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: 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: Research Communities by Springer Nature Understanding Sensitivity in Photonics Understanding Sensitivity in Photonics In the realm of photonics, the term “sensitivity” is often employed, albeit with varying meanings that can sometimes lead to confusion. In this blog post, we will explore the different contexts in which sensitivity is used, focusing on photodetectors and other
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Source: MDPI Spectral Response of a Photodetector Spectral Response of a Photodetector Understanding Spectral Response The spectral response of a photodetector refers to the range of optical wavelengths or frequencies to which the detector is sensitive. It indicates the level of responsivity exhibited by the detector within that range. The minimum responsivity threshold can vary
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Source: YouTube Bipolar Phototransistors Phototransistors are semiconductor-based photodetectors that can be classified into bipolar phototransistors and field-effect phototransistors (photoFETs). Bipolar phototransistors operate on the principle of amplifying collector current when light hits the base-collector junction. This amplification results in higher responsivity compared to photodiodes. However, the detection bandwidth of bipolar phototransistors is limited by the
Source: Laser Components Avalanche Photodiodes: Understanding the Technology Avalanche Photodiodes: Understanding the Technology Introduction An avalanche photodiode (APD) is a type of semiconductor-based photodetector that operates at a high reverse voltage, allowing for the amplification of photocurrent through an avalanche process. This technology finds applications in various fields such as optical communications, laser microscopy, and
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