Questions about a Laser Interferometer pattern

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SUMMARY

Interference patterns can be generated using a laser beam without splitting it, provided that the setup allows for coherent light to interact. The discussion specifically references using two mirrors separated by 2 cm to reflect light from an incident ray 500 meters away, similar to a Michelson interferometer. Moving one mirror by half a wavelength will indeed alter the interference pattern observed on the screen. Additionally, the coherence length of a typical laser beam is crucial for maintaining the visibility of these patterns.

PREREQUISITES
  • Understanding of laser coherence and interference principles
  • Familiarity with Michelson interferometer configurations
  • Knowledge of optical path length and its effect on interference
  • Basic principles of wave optics
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  • Research the coherence length of various laser types, including HeNe and Nd:YAG lasers
  • Explore advanced Michelson interferometer designs and applications
  • Study the mathematical principles behind interference patterns and fringe visibility
  • Investigate the effects of environmental factors on laser interference experiments
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Physicists, optical engineers, and students studying wave optics or laser technology will benefit from this discussion.

snuz2001
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TL;DR
Interference without splitting
Is it possible to get an interference pattern if the original laser beam is not splitted before reunited? Can I use 2 mirrors which will be separated 2 cm from each other and they reflect the light from the incident ray 500 meter far which is then reunited to get an interference pattern on a screen, so if I’ll move one mirror half wave length the interference pattern will change on the screen?
 
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snuz2001 said:
Can I use 2 mirrors which will be separated 2 cm from each other and they reflect the light from the incident ray 500 meter far
What is the coherence length of a typical laser beam?

https://en.wikipedia.org/wiki/Coherence_length
 

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