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Manual Tunable Fiber Filter
Fiber Optics

Manual Tunable Fiber Filter

Supplier
Shconnet
Category
Fiber Optics
Origin
China

Tunable optical filters are used to pass or block specific wavelengths in an optical path, and therefore have wide applications. Our tunable fiber filters use a thin-film structure: the beam from the input fiber is first collimated, passes through the tunable filter, and is then refocused into the output fiber. The manually tunable fiber filter is equipped with a manual tuning knob used to change the angle of incidence between the beam and the filter, thereby selecting different wavelengths. Combined with a broadband light source, a manually tunable fiber filter can form a narrow-linewidth broadband tunable source. The linewidth of an optical filter is defined as Full Width at Half Maximum (FWHM). Standard fiber filters have smooth, rounded transmission spectra, because the fiber filter is determined by a single Fabry-Perot resonant cavity, which consists of two mirrors and a fixed air gap. The wavelength that the optical filter can pass is selected by adjusting the distance between the two mirrors. The spectral shape produced by this F-P cavity filter 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-type filter spectra, the falling edges of the filter spectral line become steep, and wavelengths outside the passband can be effectively suppressed. For more information, please contact our sales staff. The input/output of tunable fiber filters can use single-mode fiber, multimode fiber, or polarization-maintaining fiber. The wavelength range can be selected within 400nm~1625nm. Polarization-maintaining fiber filters use Panda-type PM fiber. If other types of PM fiber are needed, please contact our sales staff.

Specification Snapshot
Linewidth
1.1±0.1nm (standard); 0.3nm (optional)
Polarization Dependent Loss
Typical value less than 0.3dB
Insertion Loss
Typical value less than 2.5dB (over the entire tuning range)
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Overview

Tunable optical filters are used to pass or block specific wavelengths in an optical path, and therefore have wide applications. Our tunable fiber filters use a thin-film structure: the beam from the input fiber is first collimated, passes through the tunable filter, and is then refocused into the output fiber. The manually tunable fiber filter is equipped with a manual tuning knob used to change the angle of incidence between the beam and the filter, thereby selecting different wavelengths. Combined with a broadband light source, a manually tunable fiber filter can form a narrow-linewidth broadband tunable source. The linewidth of an optical filter is defined as Full Width at Half Maximum (FWHM). Standard fiber filters have smooth, rounded transmission spectra, because the fiber filter is determined by a single Fabry-Perot resonant cavity, which consists of two mirrors and a fixed air gap. The wavelength that the optical filter can pass is selected by adjusting the distance between the two mirrors. The spectral shape produced by this F-P cavity filter 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-type filter spectra, the falling edges of the filter spectral line become steep, and wavelengths outside the passband can be effectively suppressed. For more information, please contact our sales staff. The input/output of tunable fiber filters can use single-mode fiber, multimode fiber, or polarization-maintaining fiber. The wavelength range can be selected within 400nm~1625nm. Polarization-maintaining fiber filters use Panda-type PM fiber. If other types of PM fiber are needed, please contact our sales staff.

Specifications

ParameterValue
Tunable RangeStandard product 50 nm
Accuracy<0.1nm (typical)
Wavelength/Temperature Drift<0.002nm/°C
Tolerable Optical Power200mW: standard product

Applications

. Our tunable fiber optic filters employ a thin-film structure: the beam from the input fiber is first collimated, passes through the tunable filter, and is then refocused into the output fiber. The manually tunable fiber optic filter has a manual adjustment knob used to change the incident angle between the beam and the filter, thereby selecting different wavelengths. Combined with a broadband light source, the manually tunable fiber optic filter can form a narrow-linewidth broadband tunable source. 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 tunable 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

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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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