Sagnac interferometer
E646034
A Sagnac interferometer is an optical device that splits and recombines light traveling in opposite directions around a closed loop to measure rotation or phase shifts with high precision.
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
optical interferometer
ⓘ
precision measurement device ⓘ rotation sensor ⓘ |
| appliesTo |
fundamental physics experiments
ⓘ
geophysics ⓘ inertial navigation ⓘ |
| basedOn | Sagnac effect NERFINISHED ⓘ |
| canUseMedium |
free‑space path
ⓘ
optical fiber ⓘ ring laser cavity ⓘ |
| comparedWith | Michelson interferometer NERFINISHED ⓘ |
| developedFrom | Sagnac experiment NERFINISHED ⓘ |
| differsFrom | Michelson interferometer by using a closed loop path ⓘ |
| hasComponent |
detector
ⓘ
input beam splitter ⓘ optical path loop ⓘ output beam combiner ⓘ |
| hasConfiguration |
fiber loop geometry
ⓘ
free‑space loop geometry ⓘ ring geometry ⓘ |
| hasEffect | interference fringes ⓘ |
| hasOutput | intensity modulation at detector ⓘ |
| hasPrinciple | phase difference proportional to rotation rate ⓘ |
| hasProperty |
common‑path stability
ⓘ
high rotational sensitivity ⓘ insensitivity to linear acceleration ⓘ |
| measures |
angular velocity
ⓘ
phase shift ⓘ rotation ⓘ |
| namedAfter | Georges Sagnac NERFINISHED ⓘ |
| operatesWith |
coherent light source
ⓘ
laser ⓘ |
| relatesTo |
non‑inertial reference frames
ⓘ
special relativity ⓘ |
| sensitiveTo |
path length difference
ⓘ
refractive index changes ⓘ rotation‑induced phase shift ⓘ |
| usedFor |
gyroscopy
ⓘ
precision metrology ⓘ tests of fundamental physics ⓘ |
| usedIn |
fiber‑optic gyroscope
ⓘ
optical rotation sensors ⓘ ring laser gyroscope ⓘ |
| uses |
beam splitter
ⓘ
closed optical path ⓘ counter‑propagating beams ⓘ light ⓘ mirrors ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.