APODIZED - CHIRPED FIBER BRAGG GRATING GTL-FBG-ADG-820
Description
The apodized FBGs have special profile of induced refractive index modulation and grating strength along the grating length. Therefore, side lobes level becomes smaller in compared to ordinary gratings. There are a lot of apodization profiles which lead to the optimization of various FBG parameters such as strength, FWHM, SLSR, the value of dispersion. We are using several types of apodization profiles and functions: sine, Gauss, Semi Gauss and Super Gauss.
APODIZED - CHIRPED FIBER BRAGG GRATING GTL-FBG-ADG-820
Specifications |
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|---|---|
| Center Wavelength Range: | 633-2300nm |
| FBG Length: | Custom |
| Reflectivity: | Not Specified |
| Reflectivity, %: | 5 ÷99 |
| Chirp Rate, Nm/cm: | 0.01 ÷ 25 |
| Bandwidth (FWHM), Nm: | 0.5 ÷ 50 |
| SLSR, DB: | › 15 |
| FBG REcoating: | None, Acrylate, Polyimide |
Features
The simple one is “sine” type which saves the length of the gratings and provides SLSR around 20dB. Such function is optimal for save of the grating length and value of SLSR level.
The Gaussian type “Gauss” which ensures best SLSR value around -30dB. A lot of applications such as pulsed fiber lasers need special dispersion value and reflection spectrum of the FBG. Gaussian profile of apodization for chirped FBGs allows good results on these applications. The reflection spectrum of apodized chirped FBG with gaussian profile of reflection spectrum and profile of refractive index change along the FBG are presented on the graphs.
The “SuperGauss”apodization profiles are required for “Flat Top”reflection spectra of chirped FBGs. The “SuperGauss” profile of refractive index change along the FBG is presented on the picture.
Applications
Apodized FBGs are useful in sensing applications, signal and Brillouin scatter filtering and others.
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How to order?
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Ships from:
Russia
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Sold by:
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On FindLight:
since 2020
Frequently Asked Questions
Yes, the configuration and parameters specified in the specification can be changed according to the customer's request.
Apodized FBGs are useful in sensing applications, signal and Brillouin scatter filtering, and others.
The different types of apodization profiles used in apodized FBGs include sine, Gauss, Semi Gauss, and Super Gauss.
An apodized FBG is a fiber Bragg grating with a special profile of induced refractive index modulation and grating strength along the grating length, resulting in smaller side lobes compared to ordinary gratings.
The optimal function for saving the length of the gratings and providing SLSR around 20dB is the "sine" type.