Which Matters More for Optical Components: Average Power or Peak Power?

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Discussion Overview

The discussion revolves around the power handling capabilities of optical components, specifically whether average power or peak power is more critical in this context. Participants explore the implications of both definitions in relation to the performance and durability of optical components, particularly in fiber optics.

Discussion Character

  • Debate/contested
  • Technical explanation

Main Points Raised

  • One participant questions whether the power handling capability refers to average power or peak power, expressing uncertainty about which is more relevant.
  • Another participant notes that the context usually clarifies whether peak power is intended, suggesting that explicit mention is common.
  • A participant with experience in fiber optics discusses specifications for telecordia class components, indicating that a low power rating might imply average power but raises concerns about high peak power potentially damaging components. They consider the effects of absorption and heat transfer in materials, leading to a circular reasoning about which power definition to prioritize.
  • Another participant suggests that industrial specifications typically refer to normal operation and recommends consulting suppliers or manufacturers for clarification, emphasizing the importance of reviewing documentation closely.

Areas of Agreement / Disagreement

Participants express differing views on the relevance of average versus peak power, with no consensus reached on which definition is more critical for optical components.

Contextual Notes

The discussion highlights the complexity of power handling specifications, including potential dependencies on material properties and operational contexts, without resolving the underlying uncertainties.

narra
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Something that i have wondered for a long time is when an optical components power handling capability is discussed, is it the average power or peak power that is in question?

Thanks.
 
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Depends on the context ... usually, if peak power is intended, then someone will say so.
 
I work with fibre optic components and one of the specifications that I typically find for telecordia class components is a power handling capability of say 300-500mW. My first reaction is that a power that low must be an average power but then if you have a high power peak then why wouldn't that burn a component. In my mind I consider the absorption and heat transfer of the material and deduce that if a pulse is sufficiently narrow in time then a high peak can perhaps fail to be absorbed or rapidly dispersed through the medium to such an extent to which the impact my not be severe. Then I switch to the idea that perhaps the average power is the quantity to focus on because it's referring to, on average, how much power is incident at all time even if the heat is being transferred away by the natural properties of the material. This argument goes round in circles and I'm not fully convinced which power definition is the best to keep in mind.
 
An industrial specification is usually for normal operation.
If you are concerned, ask the supplier or the manufacturer.
It is usually clear after a close reading of the documentation.
 

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