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Bandpass Fiber Filter
Fiber Optics

Bandpass Fiber Filter

Supplier
Shconnet
Category
Fiber Optics
Origin
China

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.

Specification Snapshot
Insertion Loss
As low as 0.5dB
Linewidth
As low as 0.3nm
Polarization Dependent Loss
Typical value less than 0.3dB
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Overview

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.

Specifications

ParameterValue
Operating Wavelength Range (Optional Range)400~1625

Applications

. Our fiber optic filters employ a thin-film structure: the beam from the input fiber is first collimated, passes through the filter, and is then refocused into the output fiber. The linewidth of an optical filter is defined as the Full Width at Half Maximum (FWHM). A standard fiber optic filter has a smooth, rounded transmission spectrum, which is determined by the single Fabry-Perot cavity used in the filter. The Fabry-Perot cavity consists of two mirrors and a fixed gap between them. The wavelength that the optical filter transmits is selected by adjusting the distance between the two mirrors. The spectral shape produced by such an F-P cavity filter is called a Lorentzian (Lorentz) lineshape. The spectrum produced by a single F-P cavity is a narrow-linewidth, peak-shaped spectrum. Filters with a flat-top shape can be obtained by stacking multiple F-P cavities, which produces a flat-top, bandpass filter spectrum with steep falling edges and effective suppression of wavelengths outside the passband. For more information, please contact our sales staff. The input and output of the fiber optic filter can be single-mode fiber, multimode fiber, or polarization-maintaining fiber, and the wavelength range can be selected from 400nm to 1625nm. PM fiber optic filters use Panda-type PM fiber; if other types of PM fiber are required, please contact our sales staff.

Datasheet

Product Datasheet
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Supplier Information

Sh
Shconnet
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Shanghai Connect Fiber Communications Technology Co., Ltd., founded in 2003, is a high-tech enterprise specializing in the R&D and production of laser sources, fiber lasers, fiber amplifiers, and related products. The company has formed four major product series: laser sources, fiber lasers, fiber amplifiers, and fiber Bragg gratings. Products include various wavelength laser sources, single-frequency lasers, high-power fiber amplifiers, single-frequency polarization-maintaining fiber amplifiers, continuous and pulsed fiber lasers, high-power fiber Bragg gratings, phase-shifted gratings, chirped gratings, etc. These products provide innovative solutions for high-performance fiber laser development, LiDAR, fiber sensing, fiber communications, test and measurement, and scientific research. The company is committed to supplying globally leading technologies and products, serving fields such as specialty fibers, fiber laser industrialization, fiber sensing, fiber optic gyroscopes, LiDAR, and industrial laser applications.

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