Inrad supplies etalons for many applications. Solid etalons typically are used for laser linewidth narrowing or as a narrow linewidth filter in diagnostic equipment. Air gap etalons find wide use in telecommunications applications.
Etalon performance, or finesse, is determined mainly by the optical figure of the etalon and by the reflectivity of the coatings. In the case of solid etalons, the cavity is formed by the distance (substrate thickness) between the thin film coatings. In air gap etalons, the spacer sets the cavity length. For all etalons, precise control of thickness of the elements is essential. Inrad meets a thickness tolerance of +/- 0.0005 mm.
Typical Specifications
Size
1 to 25mm diameter or cross section
Thickness Tolerance
0.5 microns
Minimum Thickness
60 mm
Flatness
l/20
Parallelism
0.5 arc sec
Scratch/Dig
10/5
Please keep in mind that Inrad manufactures custom optics only. If you have a print you would like to send, please submit a Request for Quotation.
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Inrad is noted for its experience in manufacturing thin glass and crystal plates to exacting tolerances. Additionally, optical contacting capability and state-of-the-art metrology enable Inrad to offer special expertise in the manufacture of high precision etalons.
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