Which energy is easier to catch? LED or laser

In summary, the conversation discusses the difference between LEDs and lasers in terms of beam divergence, spectral content, and temporal coherence. The participants then consider which one would be more efficient in delivering energy into an optical cavity with resonant modes. Factors such as frequency intensity and attenuation are also considered. Ultimately, the ease of getting the energy inside the cavity is determined to be the most important factor.
  • #1
fisico30
374
0
Hello Forum,

I understand the difference between LEDs and lasers: both operate at optical frequencies, but the LEd has a larger beam divergence and a higher spectral content, less temporal coherence...

Assuming we are able create the same beam divergence for a laser as for a LED (using lenses), and we want to collect energy within a box, a resonator that has an aperture, which one will be better? Which one will allow most of the energy to enter the box in the easier way?

thanks
fisico30
 
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  • #2
What do you think? What are the properties of the optical cavity that determine the amount of energy collected?
 
  • #3
Well, a cavity has its resonant modes. So technically, if the LED, which has more frequencies, has some frequencies that correspond to the resonant frequencies of the cavity maybe more energy is delivered by the LED inside the cavity...
 
  • #4
Have you considered the intensity emitted in each frequency? What's better, 90% of the light being within a narrow range of frequencies corrosponding to a mode of the cavity, or a much smaller percentage in the same mode and another small percentage in another mode?
 
  • #5
Well, it seems that if the LED and the laser have the same power, it depends on the attenuation that each mode suffers...more modes more likely to have more energy.
without attenuation it seems it would not matter...
What would matter is which way is easier to get the energy inside the cavity...
 

Related to Which energy is easier to catch? LED or laser

1. Which energy source is more efficient, LED or laser?

The efficiency of an energy source depends on various factors such as the type of LED or laser, the environment in which it is used, and the intended purpose. Generally, LEDs tend to be more energy-efficient than lasers as they require less power to produce the same amount of light. However, laser technology has advanced significantly in recent years, and some lasers can now surpass the efficiency of LEDs.

2. Which energy is easier to control, LED or laser?

Again, the ease of control depends on the specific type of LED or laser being used. Generally, LEDs are easier to control as they can be dimmed or brightened easily, and their light output can be easily directed using lenses. Lasers, on the other hand, require more complex control systems and are more sensitive to environmental factors such as temperature and humidity.

3. Which energy source is cheaper, LED or laser?

The cost of an LED or laser depends on various factors such as the brand, type, and quality. In general, LEDs tend to be cheaper than lasers as they are mass-produced and have a wider range of applications. Lasers, on the other hand, are more specialized and require more advanced technology, making them more expensive.

4. Which energy is safer for human eyes, LED or laser?

Both LED and laser lights can be harmful to the eyes if not used properly. However, LEDs tend to be safer as their light output is diffused, while lasers produce a highly concentrated beam of light. Therefore, it is essential to follow safety precautions and use proper protective equipment when working with either energy source.

5. Which energy is better for the environment, LED or laser?

In terms of environmental impact, LEDs are considered to be more eco-friendly than lasers. LEDs do not contain harmful substances such as mercury, unlike some types of lasers. Additionally, LEDs have a longer lifespan and require less energy to operate, resulting in lower carbon emissions. However, both energy sources have their own environmental advantages and disadvantages, and it ultimately depends on how they are manufactured and used.

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