Collecting energy from a hot diffuse source

AI Thread Summary
The discussion focuses on collecting energy from a column of hot gas that emits radiation in all directions. The goal is to maximize the energy collected through a window and funnel it into a fiber optic using a coupler with a specific acceptance angle. The application is for doctoral research involving inverse radiation methods to analyze gas properties through spectral measurements. Participants are encouraged to share ideas on effective collimation techniques to optimize energy capture from the diffuse source. The aim is to enhance the efficiency of energy collection for accurate temperature and composition analysis.
edge540t
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Alright, let's see what ideas everyone comes up with on this question. I'm no optics guru, so I'm hoping you have better ideas than me. Here's the situation: I have a column of hot gas wherein every gas molecule emits radiation over 4π sr. At one end of the column I have a window where emitted energy can pass through to be collected. The end goal is to collect as much energy as possible from this hot gas column and focus it into a fiber optic. I have a fiber coupler that accepts collimated light and focuses it into the fiber. So, the question becomes what is the best way to collimate as much energy as possible from this diffuse source so it will go into my fiber? The coupler has some acceptance angle θ (it accepts a column + some small divergence.
 
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edge540t said:
Alright, let's see what ideas everyone comes up with on this question. I'm no optics guru, so I'm hoping you have better ideas than me. Here's the situation: I have a column of hot gas wherein every gas molecule emits radiation over 4π sr. At one end of the column I have a window where emitted energy can pass through to be collected. The end goal is to collect as much energy as possible from this hot gas column and focus it into a fiber optic. I have a fiber coupler that accepts collimated light and focuses it into the fiber. So, the question becomes what is the best way to collimate as much energy as possible from this diffuse source so it will go into my fiber? The coupler has some acceptance angle θ (it accepts a column + some small divergence.

Welcome to the PF. What is the application? Is this a school project?
 
This is part of the design for some experiments I need to run as part of my doctoral research. The application is inverse radiation methods. I want to collect radiation, send it to my spectrometer, then use the measured spectrum to deduce the temperature and/or mole fractions of gases in the chamber that emitted the radiation.
 
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