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Advantages Of Semiconductor Optical Amplifiers

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Introduced in the 1990s, the optical amplifier gave new dimensions to the regenerator technology and opened new opportunities to the WDM (Wavelength Division Multiplexing) technology as well. Mainly, it is used for directly amplifying an optical signal without having to convert it into an electrical signal. As you may already know, there are several kinds of optical amplifiers including erbium-doped-fiber amplifiers (EDFAs), Raman amplifiers, and the popular semiconductor optical amplifiers (SOAs). Semiconductor optical amplifiers make use of a semiconductor as a gain medium. These are specially designed to increase the optical launch power in order to compensate for the loss of optical devices in general applications. SOAs are frequently used in telecommunication systems as fibre-pigtailed components that are capable of generating gains of a maximum of 30 dB and usually operate at signal wavelengths ranging from 0.85 µm to 1.6 µm. Advantages of SOAs: 1. Semiconductor optical amplifi...
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Comparison of SLD, LD, and LED

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Superluminescent diodes reduce coherence noise and enable the user to acquire high-precision measurement. So it is used in sensing fields, including photo-application measurement and medical images. Whereas, LEDs are usually considered light sources because they emit light waves without any liquid medium. Further, LDs are essentially laser diodes thus acting as point light sources. Here are some of the key differences between Superluminescent Diodes, Light emitting diodes, and laser diodes: 1. Emitting State: LD: Laser diodes have 2 reflecting coatings in which one of them prevails over the other to maintain the signal. Thus, the end facet reflectivity of one side is greater than the opposite. SLD: Superluminescent diodes have both ends facets with non-reflecting coating. Instead of reflection, the input gets absorbed. LED: While the other 2 maintained a unidirectional flow, LED arrangements are rather special, at an angle of 90 degrees. 2. Emitted Light: LD: LDs emit stimulated em...
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Application Of Semiconductor Optical Amplifiers

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Since semiconductor optical amplifiers have special properties such as low power consumption, wavelength flexibility and nonlinearities, it is important in the development and optimization of electronic devices. It has major applications in optical reflections and related sectors, let us take a look at some of them: 1. Direct Signal Amplification: Signal amplification refers to increasing the strength of the signal. Long-distance signal transmission via optical arrangement is prone to power loss, due to constant optical reflection. Semiconductor optical amplifiers help to mitigate these losses and continue the signal by amplifying the signal strength. 2. External Modulation: SOA works as an efficient modulator. Modulating refers to the process of superimposing the amplitude, frequency, etc., parameters of the wave onto another wave. Thus external modulation is one of the primary applications of semiconductor optical amplifiers. 3. Optical Pulse Generation and Manipulation: Any impulse...
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Definition And Working Of VCSEL

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Semiconductor lasers such as FP, DFB, VCSEL and more are essential devices for regulating and improving the Internet and communication sector in the world. Laser’s outstanding properties such as high efficiency of the electrical energy into photons, excellent reliability, small footprint, modulation bandwidth, and low cost have made it a principle component in various communication applications. Vertical Cavity Surface Emitting Laser is one such laser that is largely used in various industrial and military applications. Let's know what is VCSEL in detail. What is VCSEL? VCSEL   is the type of semiconductor laser diode with laser beam emission perpendicular from the top surface, as opposed to conventional edge-emitting semiconductor lasers which emit from surfaces. Compared to conventional edge-emitting light diodes, VCSEL emits light or a vertical beam from its top surface. Now let us comprehend how Vertical Cavity Surface Emitting Laser works. Note that, as it is challenging t...
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Superluminescent Diodes For Optical Coherence Tomography

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It is not uncommon to see the use of superluminescent diodes for optical coherence tomography. Because of the unique properties of superluminescent diodes (SLD), such as low coherence light, high brightness, minimal spectral ripple, and a broad, smooth optical output spectrum, it is the preferred and perfect solution for optical coherence tomography. However, in order to comprehend why superluminescent diodes are used for optical coherence tomography, let's understand these things. Why Use Superluminescent Diodes For Optical Coherence Tomography? Let’s start with a quick overview of OCT. Optical coherence tomography is an imaging technique that captures micrometer-resolution, two- and three-dimensional images from within optical scattering media using low-coherence light. It’s used in medical imaging and non-destructive testing in the workplace. To put it another way, OCT is a new technology for high-resolution cross-sectional imaging. Superluminescent Diodes For Optical Coherence...
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Introduction of LiDAR Drones

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 Light detection and ranging, or LiDAR laser , is a remote sensing technique that is increasingly being used in conjunction with drones. One can calculate the distance to the earth’s surface by using the speed of light, measuring the two-way travel time from the scanner’s laser beam, and creating a 3D point cloud. It is possible to distinguish real-life objects in LiDAR data because it is possible to determine which surface type the return came from based on the intensity of the return signal. This does closely match how much one would find in a picture. Let’s look at some exciting applications in which LiDAR-equipped drones are useful. But first, let’s discover what LiDAR drones are. What Is a LiDAR Drone? Any airborne drone with a LiDAR sensor attached is a LiDAR drone. The cost and size of LiDAR sensors have significantly decreased in recent years due to progress in the field of LiDAR technology, making it easier to mount a LiDAR payload on a drone.  Additionally, as LiDAR ...
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The Architecture and Working of LiDAR Laser

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Assume you drove your car to a remote tourist destination last Christmas. Nonetheless, even though you were unfamiliar with the location or were visiting it for the first time, you made it safely. How did you do that? Well, the most probable answer could be that you used Google Maps along with the LiDAR laser technology installed in your car. Everyone who owns a car is familiar with the 3-D color map of your immediate surroundings that the car display monitor shows while you travel. This generates a map of the area around you and displays it to the driver, helping them in safe driving. But what is the name of this technology? It’s known as a LiDAR laser , which stands for Light Detection and Ranging. The Architecture of LiDAR Laser : A typical LiDAR laser consists of four major components. 1) transmitter (light source), 2) receiver (light detection), 3) signal detection system and 4) data acquisition and control system. Again, the LiDAR architecture can be built in two ways: biaxial or...
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