Bandpass Fiber Filter
Optical filters are used to select or block specific wavelengths in an optical system, so they have a wide range of applications. Our fiber filters adopt a thin-film structure: the beam from the input fiber is first collimated, then passes through the filter, and is finally refocused into the output fiber. The linewidth of an optical filter is defined as the Full Width at Half Maximum (FWHM). Standard fiber filters have smooth, rounded transmission spectra, which is determined by the single Fabry-Perot resonant cavity used in fiber filters. The Fabry-Perot cavity consists of two mirrors and a fixed air gap. The wavelength that the filter transmits is selected by adjusting the distance between the two mirrors. The spectral shape produced by such an F-P cavity is called a Lorentzian line. The spectrum produced by a single F-P cavity is a narrow-linewidth, peaked spectrum; flat-top filters can be obtained by cascading multiple F-P cavities. Cascading multiple F-P cavities produces flat-top, bandpass filter spectra, with steeper falling edges of the filter spectrum and effective suppression of out-of-band wavelengths. For more information, please contact our sales staff. The input and output of fiber filters can use single-mode fiber, multimode fiber, or polarization-maintaining fiber, and the wavelength range can be selected within 400 nm~1625 nm. PM fiber filters use Panda-type PM fiber. If other types of PM fiber are required, please contact our sales staff.
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Overview
Specifications
| Parameter | Value |
|---|---|
| Operating Wavelength Range (Optional Range) | 400~1625 |
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