When we think of physics experiments, we tend to envision cavernous rooms filled with things like optical benches, huge coils in vacuum chambers, and rack after rack of amplifiers and data acquisition ...

Laser self-mixing interferometry (SMI) harnesses the phenomenon of optical feedback by reinjecting a fraction of a laser’s output back into its cavity. This reinjection leads to an interference effect ...

Purdue faculty dedicate countless hours to exploring the frontiers of their respective fields, pushing the boundaries of knowledge and contributing to the ever-evolving landscape of academia. To ...

Focused Laser Differential Interferometry (FLDI) is an innovative, non‐intrusive optical diagnostic tool designed to capture high-resolution density fluctuations within hypersonic flow environments.

The European Space Agency (ESA) has launched the first payload of a mission designed to test optical hardware for detecting gravitational waves. The LISA Pathfinder mission, which blasted off from ...

A new theoretical framework shows how subtle fluctuations in spacetime could be detected using existing interferometers.

A lot of what I write is about measurement, not because I'm in love with calipers, but because the cutting edge of physics is at the limit of what we can measure. That means that when you want to ...

The new, compact AccuFiz® Fizeau laser interferometer offers an unmatched combination of performance, quality and value, for high accuracy shape and transmitted wavefront quality measurements of ...

LISA is a gravity wave observatory that would open an entirely new window in the universe. Using ripples in the fabric of space-time caused by the motion of the densest objects in the universe, LISA ...

Warming up: illustration of the interferometer. (Courtesy: APS / Alan Stonebreaker) An atom interferometer that does not have to be cooled to cryognenic temperatures has been created by physicists in ...

We suspect there are three kinds of people in the world. People who have access to a Michelson Interferometer and are glad, those who don’t have one and don’t know what one is, and a very small number ...