helium–neon laser
E706446
The helium–neon laser is a type of gas laser, commonly emitting visible red light at 632.8 nm, widely used for alignment, holography, and educational demonstrations due to its stable, low-power coherent beam.
Statements (50)
| Predicate | Object |
|---|---|
| instanceOf |
gas laser
ⓘ
laser ⓘ |
| commonApplication |
barcode scanning
ⓘ
educational demonstrations ⓘ holography ⓘ interferometry ⓘ laboratory metrology ⓘ optical alignment ⓘ optical experiments in teaching labs ⓘ |
| developedInDecade | 1960s ⓘ |
| emitsColor | red ⓘ |
| emitsLightType |
coherent light
ⓘ
monochromatic light ⓘ visible light ⓘ |
| emitsWavelength | 632.8 nm ⓘ |
| energyTransferFrom | helium atoms ⓘ |
| energyTransferTo | neon atoms ⓘ |
| feature |
air-cooled operation
ⓘ
excellent pointing stability ⓘ good spatial coherence ⓘ good temporal coherence ⓘ high beam quality ⓘ high reliability ⓘ long coherence length ⓘ long lifetime ⓘ narrow linewidth ⓘ often single longitudinal mode ⓘ relatively low cost ⓘ simple construction ⓘ single transverse mode operation ⓘ |
| gasPressure | low pressure ⓘ |
| operatingMode | continuous wave ⓘ |
| pumpMechanism | electric discharge ⓘ |
| requiresComponent |
discharge tube
ⓘ
high-voltage power supply ⓘ mirrors ⓘ optical resonator ⓘ |
| safetyClass |
often Class II
ⓘ
often Class IIIa ⓘ |
| transitionMedium | neon atoms ⓘ |
| typicalHeNeGasRatio |
about 5:1 helium to neon
ⓘ
helium-rich mixture ⓘ |
| typicalOutputPower | low power ⓘ |
| typicalOutputPowerRange | 0.5 mW to 50 mW ⓘ |
| typicalTubeMaterial | glass ⓘ |
| usedIn |
industrial alignment systems
ⓘ
optical research setups ⓘ university laboratories ⓘ |
| usesGainMedium |
helium gas
ⓘ
neon gas ⓘ |
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.