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Questions tagged [fiber-optics]

23 questions
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4 answers

Create a DIY light tube

I am working on a project to bring light into a bunker. The bunker is 3-4 meters below the ground. I am looking into bringing natural light into the space, instead of using electricity. The space is difficult to access and light must therefore be…
Sylvain
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5
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3 answers

Could a water stream be used as a fiber optic sensor and detect when the stream is broken?

I have a small idea/project I am working on in which I want to use a water fiber optic sensor that can detect whether the water stream is broken and if so shut off the water. Having looked into fiber optic sensor systems in general, all I have…
James Dawson
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4
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How does a cable-laying ship retrieve a partly-laid cable?

I was reading an article in the press this week about a project to lay an undersea cable across the Tasman Sea. The ship had had to return to port for repairs and return to complete the job later. This got me wondering: how does the ship secure the…
Airsick
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3
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Why is the jacket or sheath of fibre optic endoscopes always black?

Why is the jacket or sheath of fibre optic endoscopes always black? Is it just a convention, or is there a more logical explanation for this?
user3489
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How can the Microsoft and the Facebook Fibers reach 160 Tbps between Virginia and Bilbao?

According to this article, Microsoft and Facebook have completed a 160 terabits cross-Atlantic cable. Based on my calculations, this doesn't seem probable, so what did I miss in my calculation? The maximum frequency that a mono-mode fiber can reach…
pierebean
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2
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1 answer

How to Determine Tensile Strength of PMMA Optical Fiber?

I researched the properties of acrylic, or PMMA, and found different results on its mechanical properties. Tensile strength is a material property, but is it affected by shape or size? I’m working on a project that involves the use of PMMA optical…
Mech E
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1
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1 answer

How is light guided by a perfect mirror waveguide for angles not exactly at the guided mode angles?

Take the below image for example: Let's imagine the cladding is really just perfect mirrors, where all light energy is reflected back towards the core. I understand that modes arise by imposing the condition that round-trip (two bounces) light must…
banjoeschmoe
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Calculating Temperature of an Optical Fiber

Let's say there is 30W of light pumping into the fiber. Parameters: Length of Fiber: 6cm Input - 30 W Output -29W Loss of 1W The diameter of optical fiber is 0.25mm. Since the optical fiber is extremely light, using this method to calculate the…
Dugong98
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Heat loss in Optical Fiber

I am conducting a thermal analysis of optical fibers. ( Software used AutoCAD Fusion 360) The Inputs conditions are : Let's assume an input power of 1250W, with an efficiency of 98%. 2% loss which becomes heat. (25W) The internal heat of 25W at the…
Dugong98
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Emerging beam from PPLN waveguide not behaving well through optics

We have a pump laser beam that is coming out of a single mode fiber and butt coupled into a PPLN waveguide crystal. We are capturing the beam at the output of the crystal with the focusing lens in an attempt to collimate it into a beam. The emerging…
Bilal
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What's the difference between pulsed lasers and frequency combs?

Can you please explain the difference between high-energy pulsed lasers and frequency combs?
y1004
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Use Fiber microscope to view micron sized particles

Can I use Fiber microscope to see micron sized particles? That's mean, can Fiber microscope be used as a typical optical microscope? Generic Handheld 400x Fiber Optical Microscope Inspection
seyyedali hosseini
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How can I transport sunlight (with UV, IR etc...) across space?

I currently have a tiny vertical farm which I am trying to make as energy efficient as possible. A big chunk of my power consumption comes from LED lights which are powered by solar panels/batteries, and I was wondering if there was a more efficient…
AndreAwb
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Mounting APC E-2000 fibre terminator to Thorlabs parts

I am building an optical setup that consists of Thorlabs parts. The laser for the system has a pigtail that uses an APC E-2000 fibre terminator type. Thorlabs does not sell any compatible parts for APC E-2000. I have found some APC E-2000 to FC APC…
estheroate
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1 answer

What are the effects of temperature on optical fiber waveform

I am attempting to measure temperature using a signal through an optical fiber. If I send a waveform through an optical fiber, how would temperature affect it? I've looked here (Calculating Temperature of an Optical Fiber) on this site, but haven't…
jcu
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