Problems on NA and Acceptance Angle Part 2 - Lasers and Fibre Optics - Engineering Physics 2 | Summary and Q&A

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April 1, 2022
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Problems on NA and Acceptance Angle Part 2 - Lasers and Fibre Optics - Engineering Physics 2

TL;DR

Calculate the numerical aperture and acceptance angle for an optical fiber using given refractive indices of the core and cladding.

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Key Insights

  • 💯 The refractive indices of the core and cladding are essential parameters for calculating the numerical aperture and acceptance angle of an optical fiber.
  • 🙂 The numerical aperture is a measure of the fiber's light-gathering ability and determines the acceptance angle.
  • 🔺 The acceptance angle defines the maximum angle at which light can enter the fiber and be transmitted.
  • 💿 The critical angle is also important in optical fiber systems, as it determines the conditions for total internal reflection.
  • 🫰 The relative refractive index (delta) is used to calculate the refractive index of the cladding.
  • 💿 The formulas for numerical aperture and acceptance angle provide a straightforward approach to solving problems in optical fiber optics.
  • 🖐️ The acceptance angle plays a crucial role in determining the performance and efficiency of an optical fiber system.

Questions & Answers

Q: What is the formula for the numerical aperture of an optical fiber?

The formula for numerical aperture is the square root of the difference between the square of the refractive indices of the core and cladding.

Q: How is the acceptance angle calculated?

The acceptance angle can be found using the formula for the inverse sine of the numerical aperture.

Q: How can the refractive index of the cladding be calculated?

The refractive index of the cladding can be found using the formula for the square root of the difference between the square of the refractive index of the core and the numerical aperture squared.

Q: What is the significance of the acceptance angle in optical fibers?

The acceptance angle determines the maximum angle at which light can enter the fiber and still be transmitted.

Summary & Key Takeaways

  • The content discusses problems related to numerical aperture and acceptance angle in optical fibers.

  • Given data includes refractive indices of the core and cladding.

  • Formulas for numerical aperture and acceptance angle are used to find the solutions.

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