Specific Application Fiber Bragg Gratings

Wavelength 600-2300 nm; Bandwidth 0.05-50 nm; Reflectivity 0.2-99.9%; SLSR ~8->15 dB; Fiber Type SM, PM, Double Clad, LMA, Custom; Fiber Pigtail Length ≥0.5, CustomFiber Bragg gratings (FBGs) have many applications in optical communication, laser technique and sensing systems. Greitlex Photonics’ series of standard types FBGs are widely used for applications like in-fiber mirrors or optical filters with narrowband optical spectrum and can act as a sensor element for strain and temperature measuring.Within Greitlex Photonics’ series of standard types fiber Bragg gratings (FBG) you find:Uniform Fiber Bragg GratingsApodized Fiber Bragg GratingsChirped Fiber Bragg GratingsApodized-chirped Fiber Bragg GratingsFiber Laser Matched Fiber Bragg GratingsTilted Fiber Bragg Gratingsπ-Phase-Shifted Fiber Bragg GratingsGTL-FBG-UF-810 uniform fiber Bragg gratings are produced with grating lengths from 0.5 mm to 10 mm. Such gratings show their full width at half maximum (FWHM) from 0.015 nm (R = 25%) to 0.03 nm (R = 90%) for 633 nm wavelength (0.1 nm and 0.17 nm at 1580 nm) and gratings length 9 mm. Standard uniform FBGs have a bandwidth of 0.15 nm to 0.6 nm, a reflectivity of 5% to 99% and grating lengths of 1 mm to 3.5 mm.Fiber Bragg gratings are sensitive to changes of strain and temperature. Uniform FBGs can be provided as separated units or chains of FBGs with different wavelengths. By using chain FBGs, multipoint monitoring of temperature, strain or other physical parameters is available. Different types of single mode optical fibers and fiber coatings are used. Acrylate coated fibers for normal temperature range of -40˚C to +100˚C. Polyimide or metal (Cu, Al) coated fibers are used for high-temperature applications with maximum temperatures of +300˚C and +500˚C respectively.GTL-FBG-AD-820 apodized fiber Bragg gratings show a special profile of induced refractive index and grating strength along the grating length. Therefore, the side lobes level becomes smaller compared to ordinary gratings. There are a lot of apodized profiles which lead to the optimization of various FBG parameters (strength, FWHM, side lobe suppression ratio (SLSR)). Apodized FBGs are useful in sensing applications, signal and Brillouin scatter filtering and others. Possible value of SLSR for different grating strengths is -10 dB to -30 dB.Our GTL-FBG-CR-840 chirped fiber Bragg gratings feature a linear variation of the FBG period along the grating length. Chirped FBGs are manufactured by using a non-periodic phase mask. The available chirp rate of the phase mask period can range from 0.01 nm/cm to 30 nm/cm. Therefore, such FBGs have a wide spectrum bandwidth and special dispersion characteristics. Chirped FBGs are useful for gain-flattening EDFA and ASE light sources, band stop filters, in ultrafast mode-locked fiber lasers, powerful lasers, and chromatic dispersion compensation telecom systems.Apodization of chirped FBG is necessary to obtain FBGs with a smooth reflection spectrum. There are several apodization profiles that lead to the optimization of various parameters of the FBG such as reflection coefficient, FWDM, side lobe suppression ratio (SLSR), or the parameter of dispersion. In chirped FBGs the dispersion is determined by the rate of change of the period along the length of the FBG. Within the GTL-FBG-ADG-820 series of apodized-chirped fiber Bragg gratings, FORC Photonics has implemented several types of apodization profiles: Sine, Gauss, Semi Gauss and Super Gauss.The simplest type of apodization is "Sine", which "saves" the length of the FBG and provides a (SLSR) value of about 20 dB. The "Gauss" apodization function provides the best SLSR value in the order of 30 dB. For many applications, such as pulsed fiber lasers, there are special requirements for the dispersion value and the shape of the reflection profile. "Gauss" apodization of chirped FBGs allows to obtain excellent results in these applications. The "SuperGauss" type of apodization is intended for obtaining a flat-top reflection spectrum. Apodized FBGs are useful in sensing applications, signal and Brillouin scatter filtering and others.Our GTL-FBG-LP-830 fiber laser matched FBG pairs are an ideal solution for fiber laser fabrication. Minimum insertion losses and other parameters are optimal for lasers with output powers of several tens of W. High- and low-reflection gratings are available, with the high-reflection grating showing -20 dB levels of about 0.5 nm to 0.7 nm. The low-reflection output grating with 5% to 40% reflectivity has FWHM values of 0.15 nm to 0.35nm. The mismatching of LR relative to HR grating is up to ±0.15 nm. For narrow-line fiber lasers we provide FBG pairs with FWHM values around or below 0.1 nm for ideal matching without adjustment.GTL-FBG-TL-860 tilted fiber Bragg gratings have an angle between the wave vector of the grating and the fiber axis. Therefore, cladding modes resonance peaks become more intensive compared to ordinary gratings. The wavelengths of tilted fiber Bragg gratings cladding modes resonances are highly sensitive to the refractive index of the medium outside the fiber cladding. TFBGs are useful in sensing applications. Possible values of the tilt angle are 1⁰ to 45⁰.GTL-FBG-PS-870 π-phase-shifted fiber Bragg gratings have a very narrow peak within their transmission/reflection spectrum. Phase-shifted FBGs are gratings with a phase defect in the center. While the grating length determines its bandwidth, the spectral width of that peak depends on the strength of the FBG’s both parts. Typical FWHM values for our π-phase-shifted fiber Bragg gratings are 0.1 nm to 0.005 nm. A typical application of phase-shifted FBGs are narrow-bandwidth optical filters for single-frequency fiber lasers.All these FBGs replace similar products from former FORC Photonics. Key Features:The following configurations can be changed at the customer's request, please contact AMS Technologies to discuss a customized fiber Bragg grating solution tailored to your project’s requirements.   GTL-FBG-UF-810 Uniform FBGs GTL-FBG-AD-820 Apodized FBGs GTL-FBG-CR-840 Chirped FBGs GTL-FBG-ADG-820 Apodized-chirped FBGs GTL-FBG-LP-830 Fiber Laser Matched FBG Pairs GTL-FBG-TL-860 Tilted FBGs GTL-FBG-PS-870 π-phase-shifted FBGs Wavelength Range [nm] 600 - 2300 Wavelengths to Quick Order [nm] - - 1069, 1081, 1529, 1875 30 values between 633 and 2300 Fiber Type Single Mode (SM), Polarization Maintaining (PM), Double Clad, LMA, Custom SM, PM, Double Clad, Custom Single Mode (SM), Polarization Maintaining (PM), Double Clad, LMA, Custom Reflectivity [%] 0.2 - 99.9 0.5 - 99.9 5 - 99 5 - >99 5 - 99 Tilt Angle - - - - - 1° - 45° - Chirp Rate [nm/cm] - - 0.01 - 30 0.01 - 25 - - - Bandwidth (WFHM) [nm] 0.05 - 1.2 0.1 - 1.2 2 - 50 0.5 - 50 0.1 - 1.2 0.1 - 0.8 Grating (FBG) Length [mm] - - 2 - 50 - - - - SLSR [dB] ~8 >10, >15 ~8 >15 - ~8 FBG Pigtail Length [m] ≥0.5, Custom - ≥0.5, Custom FBG Recoating None, Acrylate, Polyimide, Aluminium, Copper, Custom None, Acrylate, Polyimide, Custom None, Low- or High-index Polymer, Acrylate, Polyimide, Custom None, Acrylate, Polyimide, Aluminium, Copper, Custom Tensile Strength [kpsi] >100 - >100 Optical Connector Bare Fiber, FC/APC, LC/APC, Custom - Bare Fiber, Custom Bare Fiber, FC/APC, LC/APC, Custom Package Dimensions LxWxH [mm] - - - - 25 x 10 x 6.0 - -  Applications: In-fiber Mirrors; Narrowband Optical Filters; (Multipoint) Strain & Temperature Sensing; Signal and Brillouin Scatter Filtering; Gain-flattening EDFAs; ASE Light Sources; Band Stop Filters; Pulsed, Ultrafast Mode-locked & Single-frequency Fiber Lasers; Powerful Lasers; Chromatic Dispersion Compensation Telecom Systems; Other 

Wavelength 600-2300 nm; Bandwidth 0.05-1.2 nm; Reflectivity 5-99%; SLSR >8 dB; Fiber Type SM, PM, Double Clad, LMA, Custom; Fiber Pigtail Length ≥0.5, CustomFiber Bragg gratings (FBGs) are sensitive to changes in temperature, their thermal sensitivity is about 6.7 ppm/K (+0.11 pm/K @1550 nm). Greitlex Photonics’ GTL-FBG-AP-850 athermal packaged fiber Bragg gratings are intended for passive compensation of the FBG’s thermal sensitivity by matching the case elements’ expansion with the FBG’s wavelength shift under the influence of temperature. This technology allows customers to achieve all advantages of fiber Bragg gratings, while preserving a high wavelength stability within a wide temperature range.The following configurations can be changed at the customer's request, please contact AMS Technologies to discuss a customized athermal packaged fiber Bragg grating solution tailored to your project’s requirements.These FBGs replace similar products from the former FORC Photonics. Key Features:Wavelength Range: 600 nm to 2300 nmWavelengths to Quick Order [nm]: 633, 780, 794, 797, 799, 801, 809, 830, 852, 895, 940, 976, 1030, 1057, 1060, 1064, 1080, 1125, 1150, 1178, 1240, 1270, 1310, 1484,1510 ÷ 1580, 1650, 1900, 1908, 1952, 2300Fiber Type: Single Mode (SM), Polarization Maintaining (PM), Double Clad, LMA, CustomThermal Wavelength Stability (0°C to +70°C): <0.16 nmReflectivity: 5% to 99%Bandwidth (WFHM): 0.05 nm to 1.2 nmFBG Length: 1 mm to 20 mmSLSR: ~8 dBFBG Pigtail Length: ≥0.5 mTensile Strength: >100 kpsiOptical Connector: Bare Fiber, FC/APC, LC/APC, CustomPackage Dimensions: 66 x 18 x 12 mmApplications: Passive Compensation of FBG Thermal Sensitivity; Applications Requiring High Wavelength Stability in a Wide Temperature Range

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With a measurement range of up to 500 meters for path length analysis and high-speed acquisition rates of up to 12 Hz, users can quickly identify issues, optimize device performance, and streamline testing workflows.Key featuresThe LWA 7601-C offers a powerful feature set that enables accurate and efficient testing of optical components and assemblies.Return Loss (RL) and Insertion Loss (IL) AnalysisSimultaneously evaluate critical optical performance parameters to gain a complete understanding of component quality and behavior.Reflection and Transmission MeasurementsAnalyze optical devices in both reflection and transmission modes with a single instrument, eliminating the need for multiple test systems. Distributed RL MeasurementTrace return loss along the entire optical path, making it possible to identify reflections and losses at specific locations within a device or network.Spectral Analysis CapabilitiesPerform detailed spectral analysis of insertion loss and return loss characteristics to better understand wavelength-dependent performance.Precise Event Location and Length MeasurementDetect, isolate, and accurately locate reflective events while measuring optical path length up to 500 meters, supporting rapid troubleshooting and validation.High Resolution and SensitivityA sampling resolution of 20 μm enables detailed analysis of optical structures and facilitates the detection of even minor performance variations.Fast Acquisition SpeedWith a measurement rate of up to 12 Hz, the analyzer supports high-throughput testing and production optimization.Production-Ready DesignAn optional 19-inch rack-mount version allows seamless integration into automated test benches and manufacturing environments.These capabilities help organizations reduce testing costs, improve repeatability, and increase productivity across research, development, and manufacturing operations.ApplicationsThe LWA 7601-C is designed to support a broad range of optical testing applications across telecommunications, datacom, silicon photonics, and advanced photonics manufacturing.Spatial Return Loss TestingThe instrument makes it possible to identify and quantify reflections throughout an optical path, allowing engineers to locate defects, connector issues, and component mismatches with exceptional precision.Automated Insertion Loss AnalysisManufacturers can automate insertion loss measurements and analysis processes, improving consistency while reducing manual testing effort and overall production time.High-Precision Skew MeasurementsThe LWA 7601-C supports skew measurements with sub-picosecond resolution, making it an excellent choice for applications requiring precise timing and path matching.Photonic Integrated Circuit TestingThe analyzer is ideally suited for testing advanced photonic devices, including:Photonic Integrated Circuits (PICs)Waveguide devicesPlanar Lightwave Circuits (PLCs)Arrayed Waveguide Gratings (AWGs)Reconfigurable Optical Add-Drop Multiplexers (ROADMs)Its high resolution enables detailed characterization of complex photonic structures and integrated optical systems. Fiber Optic Networks and CablesThe extended measurement range and distributed analysis capabilities make the instrument highly effective for validating fiber networks, cable assemblies, and optical links. 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