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Etalons
Etalons
Product Parameters
| Specs | Solid Etalon | Air-gap Etalon |
| Material | Fused Silica, Zerodur | |
| Dimensional tolerance | +0/-0.1mm | |
| Thickness tolerance | +/-0.01mm | |
| Surface quality | 10-5 S/D | |
| Irregularity | λ/20@632.8nm | |
| Parallelism | ＜0.5 arc sec | |
| Reflectance | 99.60% | |
| FSR(Free spectral range) | 25GHz-500GHz | |
Product Introduction
Etalon, also known as a Fabry-Perot etalon or interference filter, is a high-resolution interferometric spectroscopic instrument. The working principle of an etalon is based on the phenomenon of multi-beam interference. When light passes through an etalon, it undergoes multiple reflections and transmissions between two parallel mirror surfaces, forming multiple coherent light beams. These coherent light beams interfere with each other in space, creating an interference pattern. By observing the changes in the interference pattern, spectral analysis and wavelength calibration can be achieved. It typically consists of a pair of parallel, high-precision plane mirrors with a certain air gap or filled with a transparent medium in between. The main applications of etalons include spectral analysis, wavelength calibration, and laser mode selection. Depending on their structure, etalons can be classified into the following two types:
Air-gap Fabry-Perot Etalon (AFPE): The core of this type of etalon is a pair of high-precision plane mirrors arranged in parallel with a certain air gap between them. This type of etalon is structurally simple, easy to use, and relatively inexpensive, making it widely used.
Solid Fabry-Perot Etalon (SFPE): Unlike the air-gap etalon, the solid Fabry-Perot etalon is a monolithic quartz device. The parallelism of its two mirror surfaces is guaranteed during the manufacturing process, making it particularly convenient to use. Additionally, the solid Fabry-Perot etalon is compact and sturdy, occupying minimal space, and is therefore suitable for applications such as mode selection within laser cavities and wavelength division multiplexing in optical communications.
Etalons
Etalons
Product Parameters
| Specs | Solid Etalon | Air-gap Etalon |
| Material | Fused Silica, Zerodur | |
| Dimensional tolerance | +0/-0.1mm | |
| Thickness tolerance | +/-0.01mm | |
| Surface quality | 10-5 S/D | |
| Irregularity | λ/20@632.8nm | |
| Parallelism | ＜0.5 arc sec | |
| Reflectance | 99.60% | |
| FSR(Free spectral range) | 25GHz-500GHz | |
Product Introduction
Etalon, also known as a Fabry-Perot etalon or interference filter, is a high-resolution interferometric spectroscopic instrument. The working principle of an etalon is based on the phenomenon of multi-beam interference. When light passes through an etalon, it undergoes multiple reflections and transmissions between two parallel mirror surfaces, forming multiple coherent light beams. These coherent light beams interfere with each other in space, creating an interference pattern. By observing the changes in the interference pattern, spectral analysis and wavelength calibration can be achieved. It typically consists of a pair of parallel, high-precision plane mirrors with a certain air gap or filled with a transparent medium in between. The main applications of etalons include spectral analysis, wavelength calibration, and laser mode selection. Depending on their structure, etalons can be classified into the following two types:
Air-gap Fabry-Perot Etalon (AFPE): The core of this type of etalon is a pair of high-precision plane mirrors arranged in parallel with a certain air gap between them. This type of etalon is structurally simple, easy to use, and relatively inexpensive, making it widely used.
Solid Fabry-Perot Etalon (SFPE): Unlike the air-gap etalon, the solid Fabry-Perot etalon is a monolithic quartz device. The parallelism of its two mirror surfaces is guaranteed during the manufacturing process, making it particularly convenient to use. Additionally, the solid Fabry-Perot etalon is compact and sturdy, occupying minimal space, and is therefore suitable for applications such as mode selection within laser cavities and wavelength division multiplexing in optical communications.
