Optical Engineer

Optical Engineer Interview Questions and Answers

Updated 1 Dec 2022

Q1. Which equipment we used in optical fiber splicing

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Optical fiber splicing requires specialized equipment for precision and accuracy.

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Prism-lens system design for fingerprint scanner involves using a prism to reflect light onto a lens and then onto a sensor.

The prism should be made of a material with high refractive index to ensure maximum reflection of light.
The lens should be chosen based on the desired field of view and resolution.
The sensor should be placed at the focal point of the lens to ensure sharp image capture.
The system should be designed to minimize distortion and aberrations.
Examples of prism-...read more

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PPI stands for pixels per inch, which is a measure of pixel density in a display.

PPI determines the clarity and sharpness of an image on a screen.
Higher PPI means more pixels per inch, resulting in a clearer and sharper image.
PPI is commonly used to describe the resolution of displays, such as computer monitors, smartphones, and televisions.
For example, the iPhone X has a PPI of 458, while a typical computer monitor has a PPI of around 100-150.

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OTDR is used for testing and troubleshooting fiber optic cables.

OTDR stands for Optical Time Domain Reflectometer.
It sends a pulse of light into the fiber and measures the time and strength of the reflected signal.
This information is used to locate faults, measure attenuation, and determine the length of the fiber.
OTDR is commonly used in the telecommunications industry.
It can also be used in other industries that use fiber optic cables, such as aerospace and defense.

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Ans.

The color scheme depends on the specific project and its requirements.

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Optical fiber splicing is the process of joining two fiber optic cables together.

Splicing can be done mechanically or through fusion.
Mechanical splicing involves aligning and securing the fibers with a splice connector.
Fusion splicing involves melting the ends of the fibers together using an electric arc.
Splicing is necessary for extending the length of a fiber optic cable or repairing a damaged cable.
Proper splicing is crucial for maintaining low signal loss and ensuring rel...read more

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Ans.

OLT stands for Optical Line Terminal and is a device used in FTTH (Fiber to the Home) networks.

OLT is responsible for converting optical signals into electrical signals that can be transmitted over copper wires.
It is typically located at the central office or headend of the network.
OLT communicates with the ONTs (Optical Network Terminals) at the customer's premises to provide internet, TV, and phone services.
OLT can support multiple PON (Passive Optical Network) technologies...read more