Critical bending radius of optical fibres

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Discussion Overview

The discussion centers around calculating the critical bending radius of a single mode optical fiber, specifically one that is polyimide coated with a coating diameter of 155μm and a wavelength of 1550nm. The inquiry seeks to understand the factors influencing this calculation.

Discussion Character

  • Technical explanation, Conceptual clarification, Debate/contested

Main Points Raised

  • One participant asks how to calculate the critical bending radius for a specific type of optical fiber.
  • Another participant suggests consulting the manufacturer's specifications for the fiber in question.
  • A third participant agrees with the suggestion to refer to the manufacturer's specifications, noting that the critical bending radius is highly dependent on the exact composition of the fiber and cladding material.
  • It is mentioned that glass and polyimide are broad categories, implying variability in properties.

Areas of Agreement / Disagreement

Participants generally agree on the importance of referring to manufacturer specifications, but there is no consensus on the specific calculation method or parameters involved.

Contextual Notes

The discussion highlights the dependence on the exact composition of the fiber and cladding material, which may not be fully specified in the initial inquiry.

OrangeYogi
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Hello,

How do I calculate the critical bending radius of a single mode optical fibre? I'm using a polyimide coated fibre with coating diameter of 155μm. The wavelength is 1550nm.

Let me know if you have any questions.

Thank you
 
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OrangeYogi said:
Hello,

How do I calculate the critical bending radius of a single mode optical fibre? I'm using a polyimide coated fibre with coating diameter of 155μm. The wavelength is 1550nm.

Let me know if you have any questions.

Thank you
I would be looking at the manufacturers spec's for the fibre that you have
 
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davenn said:
I would be looking at the manufacturers spec's for the fibre that you have
That was my first thought as well...
 
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davenn said:
I would be looking at the manufacturers spec's for the fibre that you have

I agree. That will be highly dependent on the exact composition of the fiber and cladding material. Glass and polyimide are broad categories.

BoB
 

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