Ranges of coherence lengths for

[Kapacs]

Ranges of coherence lengths for...

I am dealing with a bit of a problem here figuring out a table of ranges of coherence lengths for; white light, filtered gas discharge tubes and lasers. I would greatly appreciate it if someone would be able to give me a hand with obtaining these values without having to conduct some sort of experiment. I did come across a formula; ∆x = c∆t where c = speed of light and ∆t the time it took to travel. A variation of that would be ∆x = c/∆v where ∆v is the frequency interval. Now, is there any other way I could get these ranges? A URL with a table for them would suffice.

Cheers!

 

[Valerie Park]

The coherence length of white light is typically very short (on the order of nanometers). The coherence length of filtered gas discharge tubes and lasers can vary widely, depending on the specific setup. Generally speaking, for lasers, the coherence length can be as long as a few hundred meters, or even kilometers in some cases. For filtered gas discharge tubes, the coherence length is usually much shorter, often just a few millimeters.

 

[sir-pinski]

Hi there, thank you for reaching out for help. I understand your dilemma in trying to obtain the ranges of coherence lengths for different sources of light. While conducting experiments is the most accurate way to determine these values, there are other ways to obtain them.

One way is to use the formula you mentioned, ∆x = c/∆v, to calculate the coherence length based on the frequency interval of the light source. This method may not be as accurate as conducting experiments, but it can give you a rough estimate of the ranges.

Another way is to refer to published literature or online resources that provide tables or graphs of coherence lengths for different sources of light. For example, the National Institute of Standards and Technology (NIST) website has a table of coherence lengths for various laser wavelengths.

Additionally, you can also try reaching out to experts or researchers in the field of optics for their insights and resources on obtaining these values.

I hope this helps and good luck with your research!