Air-Spaced Etalons
Description
Air-Spaced Etalons have appropriate grade fused silica (UV-visible or IR) substrates. Outside-face AR coatings and wedges on the substrates prevent extraneous interference patterns from forming. Spacers, optically contacted to the substrates, determine the parallelism of the mirrored surfaces and the etalon’s free spectral range. Depending upon the application, the spacers can be fused silica or a low thermal expansion material such as ZerodurÆ or ULE.
Air-Spaced Etalons
Specifications |
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|---|---|
| Interferometer Configuration: | Not Specified |
| Light Source: | Not Specified |
| Output Polarization: | Not Specified |
| RMS Repeatability: | Not Specified |
| RMS Precision: | <0.01 waves |
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Frequently Asked Questions
Air-Spaced Etalons are optical components made of fused silica substrates with AR coatings and wedges on the outside faces to prevent interference patterns from forming. Spacers, optically contacted to the substrates, determine the parallelism of the mirrored surfaces and the etalon’s free spectral range.
MicroEtalons are miniature air-spaced and solid etalons used for fiber optic communication applications such as DWDM, line narrowing, and channel monitoring. They can have dimensions as small as 4.5mm x 2mm x 3mm and Finesse values greater than 100.
The Finesse value of Air-Spaced Etalons can be up to 100.
Depending upon the application, the spacers in Air-Spaced Etalons can be made of fused silica or a low thermal expansion material such as ZerodurÆ or ULE.
Air-Spaced Etalons can operate at wavelengths ranging from 157nm to 3m.