Standard Types Fiber Bragg Gratings

Wavelength 600-2500 nm; Bandwidth 0.2-100 nm; Diffraction Efficiency 5-99%; Thickness Up to 50 mm; Aperture Up to 20x20 mm OptiGrate’s chirped volume Bragg gratings (CBGs) are diffractive optical elements operating as reflecting Bragg gratings with a period gradually varying along direction of beam propagation. This feature results in reflection of different wavelengths from different holographically recorded planes inside the grating. OptiGrate’s BragGrate™ Pulse is the first commercially available Chirped Bragg Grating (CBG) based product designed for the stretching and compression of ultra-short (femtosecond and picosecond) laser pulses in Chirped Pulse Amplification (CPA) and other Ultra-Short Pulse Laser (USPL) systems. It is the most compact and robust stretcher/compressor solution for high-energy and high-average-power ultra-short pulsed laser systems. The BragGrate™ Tuner is a reflecting volume Bragg grating with chirped period in one direction across its aperture, recorded in a bulk of photosensitive silicate glass. BragGrate™ Tuners can be used as an output coupler or HR mirror in a laser resonator. It enables both spectral stabilization and tuning of the laser radiation. High laser damage threshold makes these gratings suitable for usage in high-power and high-energy pulsed lasers. Tunable lasers based on these components are simple, compact, and robust. Simple linear translation of grating without angular adjustment is needed for wavelength tuning. Lasers with BragGrate™ Tuners can operate in selective laser melting (SLM) regime. Key Features: Compact Geometry and Easy-to-align Ideal for Industrial and Scientific Applications High-power Operation: Up to 1 kW Average Power High-energy Operation: Up to 2 mJ Pulse Energy Environmentally Stable Robust, Easy to Handle and Clean Multiplexed Gratings for Idle/Signal Control (BragGrate™ Tuner) Stretcher and Compressor in One Element Operating Range: 600 nm to 2500 nm Typical Center Wavelength: 1030 nm Spectral Bandwidth: 0.2 nm to 100 nm; 50 GHz to 500 GHz Typical Spectral Bandwidth for 1030 nm Spectral Range: 5 nm to 25 nm Tuning Range: >20 nm; 1 nm to 30 nm Chirp: Linear Across Full Aperture High Operation Temperatures Continuous Tuning, No Mode-hops Wide-range SF Tuning Compact/Simple Cavity Design Thickness: Up to 50 mm Typical Thickness for 1030 nm Spectral Range: 20 mm to 45 mm Stretching Time (FWHM): Up to 0.5 ns Efficiency: 5% to 99% Typical Diffraction Efficiency for 1030 nm Spectral Range: >85% Apertures: Up to 20 x 20 mm² M2: <1.3 Typical Stretching Time (FWHM) for 1030 nm Spectral Range: ~ 300 ps Typical Dispersion Rate for 1030 nm Spectral Range: ~ 6, 12, 25, 60 ps/nm (Linear) Typical Compressed Pulse Duration for 1030 nm Spectral Range: <200 fs Applications: Stretcher and Compressor for Ultra-short Pulse and Chirped-pulse Amplification (CPA) Laser Systems; Industrial; Scientific; Tunable Output Coupler; Tunable Total Mirror; Tunable Filter; Spectral Beam Combination

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, Custom Fiber Bragg gratings (FBGs) are sensitive to changes in temperature, their thermal sensitivity is about 6.7 ppm/K (+0.11 pm/K @1550 nm). FORC 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. Key Features: Wavelength Range: 600 nm to 2300 nm Wavelengths 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, 2300 Fiber Type: Single Mode (SM), Polarization Maintaining (PM), Double Clad, LMA, Custom Thermal Wavelength Stability (0°C to +70°C): <0.16 nm Reflectivity: 5% to 99% Bandwidth (WFHM): 0.05 nm to 1.2 nm FBG Length: 1 mm to 20 mm SLSR: ~8 dB FBG Pigtail Length: ≥0.5 m Tensile Strength: >100 kpsi Optical Connector: Bare Fiber, FC/APC, LC/APC, Custom Package Dimensions: 66 x 18 x 12 mm Applications: Passive Compensation of FBG Thermal Sensitivity; Applications Requiring High Wavelength Stability in a Wide Temperature Range

Wavelength 1000-2300 nm; Bandwidth 0.05-1 nm; Reflectivity 0.01-95%; SLSR ~8 dB; Fiber Type SM, PM, Double Clad, LMA, Radiation Resistant, Custom; Fiber Pigtail Length ≥0.5, Custom FORC Photonics’ GTL-FBG-FS-880 type femtosecond fiber Bragg gratings (FBGs) can be written into all optical transparent fiber materials with a broad variety of fiber coatings – without the need to strip the coating from the fiber and recoating it after the FBG writing procedure. Optical sensors based on femtosecond FBGs allow to monitor temperature, pressure, and deformation of such objects that previously hadn`t been eligible for sensing. FBGs written into radiation resistant pure silica core fibers are ideal for applications in the nuclear industry. Femtosecond FBG inscription through the fiber’s protective coating yields excellent mechanical strength – very important in strain sensing applications. The following configurations can be changed at the customer's request, please contact AMS Technologies to discuss a customized femtosecond fiber Bragg grating solution tailored to your project’s requirements. Key Features: Wavelength Range: 1000 nm to 2300 nm Fiber Type: Single Mode (SM), Polarization Maintaining (PM), Double Clad, LMA, Radiation Resistant, Custom Reflectivity: 0.01% to 95% Bandwidth (WFHM): 0.05 nm to 1 nm SLSR: ~8 dB FBG Pigtail Length: ≥0.5 m FBG Inscription Through the Fiber’s Protective Coating: Acrylate, Polyimide, Custom Additional FBG Coating (on Request): Aluminium, Copper, Custom Tensile Strength: >100 kpsi Optical Connector: Bare Fiber, FC/APC, LC/APC, Custom Applications: Monitoring Temperature, Pressure & Deformation; Nuclear Industry

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, Custom FORC Photonics’ GTL-FBG-TB-890 tunable fiber Bragg gratings (FBGs) are a good solution for many applications – including those requiring a corrected central Bragg wavelength. An FBG’s central wavelength strongly depends on applied stress, with the mechanically induced strain linearly shifting the FBG’s central wavelength. The tunable fiber Bragg grating wavelength’s relative strain sensitivity is 0.78 * 10-6 µstrain-1. GTL-FBG-TB-890 tunable fiber Bragg gratings are boxed and operated manually. Athermal performance with an adjustment range of 2 nm is also possible. The gratings are available as bare fibers or with a variety of optical connectors. The following configurations can be changed at the customer's request, please contact AMS Technologies to discuss a customized tunable fiber Bragg grating solution tailored to your project’s requirements. Key Features: Wavelength Range: 600 nm to 2300 nm Wavelengths 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, 2300 Fiber Type: Single Mode (SM), Polarization Maintaining (PM), Double Clad, LMA, Custom Thermal Wavelength Stability (0°C to +60°C): <0.18 nm Reflectivity: 5% to 99% Bandwidth (WFHM): 0.05 nm to 1.2 nm FBG Length: 1 mm to 20 mm Adjustment Range: 2 nm SLSR: >8 dB FBG Pigtail Length: ≥0.5 m FBG Recoating: On Customer Request Tensile Strength: >100 kpsi Optical Connector: Bare Fiber, FC/APC, LC/APC, Custom Package Dimensions: 66 x 18 x 16 mm Applications: Where Corrected Central Bragg Wavelength is Necessary

Wavelength 350-2700 nm; Bandwidth 0.02-20 nm; Diffraction Efficiency 3-99.7%; Thickness 0.50-20 mm; Aperture Up to 10x10-50x50 mm OptiGrate’s reflecting volume Bragg gratings (RBGs) are diffractive optical elements operating in reflecting geometry when a diffracted beam crosses the grating surface frontally oriented to an incident beam. One of the particular cases of this geometry is the retro-reflection of an incident beam. Several products based on RBG elements with different reflectivity are available: OptiGrate’s BragGrate™ Mirror is a reflecting volume Bragg grating recorded in a bulk of photosensitive silicate glass, suitable for laser mode selection and diode laser wavelength locking with a reflectivity range from 5% to 99% for spectral and thermal management of lasers. Incorporated in a laser resonator, a BragGrate™ Mirror enables the laser line spectral narrowing and thermal stabilization and can withstand high optical energy up to 5 J/cm2. The laser modal structure is controlled by the longitudinal mode selection with the bandwidth down to 20 pm and the customized central wavelengths with an accuracy of 0.1 nm to 0.5 nm. BragGrate™ Mirrors have record low absorption and allow thermal laser wavelength shift reduction to 5 pm/K @532 nm. BragGrate™ Notch Filter is a reflecting volume Bragg grating with very high diffraction efficiency, typically in a range of 90% to 99.9%, recorded in a bulk of photosensitive silicate glass. It serves as a ultra-narrow band-stop filter reflecting one narrow line (as narrow as 5 cm-1) out of the transmitted laser beam, while all other wavelength pass unaffected with up to 95% total transmission. These volume Bragg gratings enable simultaneous measurements of Stokes and Anti-Stokes Raman bands down to 5 cm-1 with a single-stage spectrometer. Our notch filters can withhold temperatures of up to +400°C and are fully environmentally stable with a practically unlimited lifetime. Central wavelengths of the filters can be angle-tuned by several nanometers without reduction of the filter optical density. BragGrate™ Combiner is a high reflectivity (90-99%) volume Bragg grating (or sets of gratings) that is used for spectral beam combining (SBC). This element enables combining of laser radiation from multiple sources with offset wavelengths into a single, nearly diffraction-limited beam with increased brightness. SBC by means of our BragGrate™ Combiner is a simple and robust technique for combining high-power laser radiation with a record spectral brightness. Excellent mechanical properties and a refractive index that is independent of temperature enables the combiners to withstand high-power laser radiation, thus making the components the ideal element for high-powered SBC. BragGrate™ Bandpass Filter is a reflecting volume Bragg grating (RBG) recorded in a bulk of photosensitive silicate glass. These filters are used to clean up laser spectral noise with a bandwidth as narrow as 50 pm in visible and near IR regions. In Raman spectroscopy applications, combining these Filters with matching BragGrate™ Notch Filters enables Raman shift measurements down to 5 cm-1 from the laser line. The widely used BragGrate™ bandpass filters have superior environmental stability and can handle high power optical radiation and high operations temperatures. Imperfections in laser optics and variations in laser gain medium cause side fringes and spatially varying intensity. Our BragGrate™ Spatial Filter is designed to “clean up” laser beams from these deficiencies. BragGrate™ Spatial Filters provide a simple, compact, and cost-effective solution for laser beam spatial filtering. They are based on reflecting volume Bragg gratings with a narrow acceptance angle that enables filtering of laser beams with a single element, thus replacing pinhole assemblies in case of narrow line laser sources. In addition to spatial filtering, BragGrate™ Spatial Filters provide ultra-narrow-line spectral filtering, can be used for high-power/high-energy applications, have superior environmental stability, and can handle high-power optical radiation and high operations temperatures. Key Features: High-power Operations: >1 kW, Up to 10 kW High-energy Operations: Up to 5 J/cm2 Superior Environmental Stability, No Degradation Over Lifetime No Polarization Dependence   BragGrate™ Mirror BragGrate™ Notch Filter BragGrate™ Combiner BragGrate™ Bandpass Filter BragGrate™ Spatial Filter Wavelength Range [nm] 350 - 2700 400 - 2500 400 - 2700 400 - 2500 400 - 2300 Standard Center Wavelengths [nm] 405, 6XX, 7XX, 8XX, 9XX, 10XX, 15XX, 19XX 488, 514.5, 532, 632.8, 785, 1064 930-980, 1030-1100 405, 488, 514, 532, 633, 785, 1064 Standard Spectral Bandwidth (FWHM) [nm] 0.1 - 0.3 <10 cm-1 0.2 - 0.5 <7 cm-1 - Spectral Bandwidth [nm] 0.02 -0.5 - 0.05 - 20 1.5 - 10 - Diffraction Efficiency (DE) [%] 3 - 99.7 - 90 - 99 >90 - Lateral Dimensions [mm²] 1.5 × 2, 1.5 × 12, 5 × 5, 8 × 8 12.5 x 12.5, 11 x 11 15 x 15, 20 x 20 5 x 5 Up to 25 x 25 Grating / BNF Thickness [mm] 0.50 - 20 2 - 4 0.50 - 10 1.5 - 10 2 - 5 Apertures [mm²] Up to 35 × 35 Up to 25 x 25 Up to 50 x 50 Up to 10 x 10 - Angular Selectivity/Acceptance [mrad] 1 - 100 0.1 - 0.2 0.5 - 10 - <5 Incident/Output (Diffracted) Angles [deg] 0 - 45 0 - 45 5 - 45 5 - 90 5 - 90   Key Features BragGrate™ Mirror: Low to No Power Penalty Narrowing of Laser Line Down to 20 pm With Superior Thermal Stability Unique Solutions to Achieve SFM Oscillations Near-diffraction-limited Beam Quality Key Features BragGrate™ Notch Filter: Ultra-narrow Rejection Bandwidth Measurements of Both Stokes and Anti-Stokes Modes Key Features BragGrate™ Combiner: High Spectral Selectivity Near-diffraction-limited Beam Quality Key Features BragGrate™ Bandpass Filter: High Spectral Selectivity Near-diffraction-limited Beam Quality Key Features BragGrate™ Spatial Filter: Spatial Filtering Without Refocusing and Pinhole Assembly Highly Cost-effective and Small Footprint Easy Alignment by Angle-tuning in Standard Kinematic Mount Simultaneous Spatial and Spectral Filtering (<5 cm-1 to Laser Line) Supports Operation at Temperatures up to +400°C Applications: Longitudinal and Transverse Mode Selection in Laser Resonators; Solid-state Lasers; High-power Diode Lasers; MM and SM Diode Lasers for Spectroscopy; Fiber Lasers; Laser Radars; LIDARS; Ultra-low Frequency Raman Spectroscopy; Raman Imaging; Thomson Scattering; High-power Spectral Beam Combining; Filtering of Spatial Noise in Laser Beams; Ultra-narrow Linewidth Spectral Filtering of Laser Beams; ASE Filters for Diode Laser Sources; Wavelength-tunable Spatial and Spectral Filters

Wavelength 600-2300 nm; Bandwidth 0.1-1.2 nm; Reflectivity 0.5-99.9%; SLSR ~8, ~10 dB; Fiber Type SM, PM, Double Clad, LMA, Radiation Resistant, Custom; Fiber Pigtail Length ≥0.5, Custom Fiber Bragg gratings (FBGs) have many applications in optical communication, laser technique and sensing systems. FORC Photonics’ series of specific application FBGs are widely used for applications like in-fiber mirrors or optical filters with narrowband optical spectrum. Fiber Bragg gratings also are one of the most popular elements in the field of fiber-optic sensing. Within FORC Photonics’ series of specific application fiber Bragg gratings (FBG) you find: Wavelength Locker FBGs WDM ITU Filter 100/200 GHz FBGs Raman Laser FBGs Fabry-Perot Interferometer FBGs Hard Environment FBGs Radiation Hard FBGs GTL-FBG-WL-810 wavelength locker fiber Bragg gratings are used as external reflectors for laser diodes. With the help of these FBGs it is easy to stabilize the wavelength generation of pump semiconductor lasers and single-frequency lasers. Low-reflection gratings with a full width at half maximum (FWHM) bandwidth of 0.3 nm to 0.8 nm and a reflectivity of 2% to 5 % are ideal for stabilizing pump power lasers. FBGs with FWHM bandwidths around 0.1 nm and reflections of 10% to 20% are used close to semiconductor laser crystals for creation of single-frequency sources. FORC Photonics provides wavelength locker FBGs with very accurate wavelength positions (up to ±0.02 nm). FORC Photonics’ GTL-FBG-WDM-810 series of WDM ITU Filter 100/200 GHz fiber Bragg gratings with narrow spectral bandwidth are good elements for filtering optical signals. Such FBGs are widely used as optical add/drop multiplexer in WDM systems. A high level of SLSR is allowed to avoid adjacent channel crosstalk in systems. These FBGs feature a flat-top reflection spectrum and steep spectral roll-down. Athermal packaging of the FBG with wavelength stability <0.16 nm for a temperature range of 0°C to +70⁰C is required for stable operation. Highly efficient multi-cascaded Raman lasers based on phosphosilicate fibers can be created at different wavelength using our GTL-FBG-RL-880 Raman laser fiber Bragg gratings. Compared to Germanium-doped fibers, an approximately three times larger Raman shift can be achieved. For many applications where very small temperature or strain changes have to be measured using acoustic waves, the sensitivity can be enhanced by using pairs of FBGs. A Fabry-Perot interferometer based on FORC Photonics’ GTL-FBG-FPI-810 Fabry-Perot interferometer fiber Bragg gratings is such a pair of FBGs, allowing to detect a small phase shift. By coating the fiber between the gratings with an electric, magnetic or acoustic enhancing coating, very small changes of these fields can be measured. For sensing purposes and to evaluate small vibration or acoustic signals via an interferometric method, it is often sufficient to work with a low-finesse Fabry-Perot cavity. GTL-FBG-HE-810 hard environment fiber Bragg gratings can be provided as separated or chains of FBGs with different wavelengths, allowing for multipoint temperature monitoring. Different types of single mode (SM) optical fibers and fiber coatings can be used for writing these gratings. High-temperature acrylate coated fibers apply for temperature ranges up to +150°C. Polyimide or metal (Cu, Al) coated fibers are used for high-temperature applications with maximum temperatures of +300°C and +500°C respectively. Using a steel tube protection, our hard environment FBGs can be applied up to +700°C. GTL-FBG-RH-880 radiation hard fiber Bragg gratings written in radiation resistant pure silica core fibers are ideal for applications in the atomic energy industry, aerospace and other radiation intense environments. Key Features:The following configurations can be changed at the customer's request, please contact AMS Technologies to discuss an application-specific, customized fiber Bragg grating solution tailored to your project’s requirements.   GTL-FBG-WL-810 Wavelength Locker FBGs GTL-FBG-WDM-810 WDM ITU Filter 100/200 GHz FBGs GTL-FBG-RL-880 Raman Laser FBGs GTL-FBG-FPI-810 Fabry-Perot Interferometer FBGs GTL-FBG-HE-810 Hard Environment FBGs GTL-FBG-RH-880 Radiation Hard FBGs Wavelength Range [nm] 630 - 2300 1530 - 1565 (C Bands) or Custom 1510 - 1580 1240, 1270, 1484 600 - 2300 1000 - 2300 Wavelengths to Quick Order [nm] 30 values between 633 and 2300 - - - 30 values between 633 and 2300 - Fiber Type Single Mode (SM), Polarization Maintaining (PM), Custom Single Mode (SM) Corning SMF-28 Single Mode (SM), Polarization Maintaining (PM), Double-clad, LMA, Custom Single Mode (SM), Polarization Maintaining (PM), Radiation Resistant, Custom Single Mode (SM), Polarization Maintaining (PM), Double-clad, LMA, Custom Single Mode (SM), Polarization Maintaining (PM), Radiation Resistant, Custom Reflectivity [%] 2 - 5, 10 - 20 10 - 99, Flat-top Typical > 99.5 5 - 99.9 0.5 - 99 Bandwidth (WFHM) [nm] 0.3 - 0.8, 0.1 - 0.15 100/200 GHz on ITU For 100 GHz: @-0.5 dB >0.3 nm, @-20 dB 0.65 nm 0.15 - 1.2 0.3 - 0.8 0.15 - 0.8 0.3 - 0.5 Distance Between FBGs [mm] - - - 1 - 200, Custom - - Channel Isolation [dB] - -20 - - - - Insertion Loss [dB] - <0.15 - - - - Cladding Mode Loss [dB] - <0.5 (Only for Cladding Mode Suppressed Fiber) - - - - SLSR [dB] ~10 - ~8 - ~8 ~8 FBG Pigtail Length [m] ≥0.5, Custom FBG Recoating None, Acrylate, Polyimide, Aluminium, Copper, Custom None, Acrylate, Polyimide, Custom None, Acrylate, Polyimide, Aluminium, Copper, Custom Tensile Strength [kpsi] >100 - >100 Thermal Wavelength Stability (0°C - +70°C) [nm] - <0.16 - - - - Optical Connector Bare Fiber, FC/APC, LC/APC, Custom Package Dimensions LxWxH [mm] - 66 x 18 x 12 - - - -   Applications: External Reflectors for Laser Diodes; Filtering Optical Signals; Optical Add/Drop Multiplexer in WDM Systems; Measuring Small Temperature or Strain Changes; Evaluating Small Vibration or Acoustic Signals; Multi-cascaded Raman Lasers; High-temperature Applications; Atomic Energy Industry; Aerospace    

Wavelength 400-2700 nm; Bandwidth 0.05-100 nm; Diffraction Efficiency 5-99%; Thickness 0.50-10 mm; Aperture Up to 50x50 mm OptiGrate’s transmitting volume Bragg gratings (TBGs) are diffractive optical elements operating in transmitting geometry when a diffracted beam crosses the back surface of the grating. BragGrate™ Deflector is a transmitting volume Bragg grating recorded in a bulk of photosensitive silicate glass. The Deflector acts as a very narrow band mode selector in angular and spectral spaces and, therefore, enables spectrally selective beam steering and angular magnification. The spectral filtering is as narrow as 0.1 nm and can easily achieve deflection angles of up to 45°. The grating is embedded inside the glass material and is stable to light powers exceeding 1 kW, temperatures >+400°C, and is fully environmentally stable. BragGrate™ Combiner is a transmitting volume Bragg grating (or sets of gratings) that is used for spectral beam combining (SBC). This element enables combining of laser radiation from multiple sources into a single, nearly diffraction-limited beam with increased energy brightness. SBC by means of our BragGrate™ Combiner is a simple and robust technique for combining high-power laser radiation with a record spectral brightness. Excellent mechanical properties and a refractive index that is independent of temperature enables the combiners to withstand high-power laser radiation, thus making the components the ideal element for high-powered SBC. Key Features: High-powered Operations: >1 kW, Up to 10 kW High-energy Operations: Up to 5 J/cm² No Degradation Over Lifetime Superior Environmental Stability Very High Angular Selectivity No Polarization Dependence at Small Incident Angles Near-diffraction-limited Beam Quality Possible Multiplexing of Different Angular Selectors in One Volume Low Wavefront Aberrations Diffraction Efficiency (DE): 5% to 99%, 90% to 99% Standard Diffraction Efficiency: >97% Spectral Bandwidth: 0.5 nm to 100 nm; 0.05 nm to 20 nm Standard Spectral Bandwidth (FWHM): 10 nm Operating Wavelength Range: 400 nm to 2700 nm Standard Center Wavelengths: 532 nm, 1064 nm, 1550 nm Grating Thickness: 0.50 mm to 10 mm Apertures: Up to 50 × 50 mm² Angular Selectivity: 0.1 mrad to 100 mrad, 0.5 mrad to 10 mrad Total Deflection Angles: 5° to 45°, <120° Lateral Dimensions: 12.5 x 12.5 mm² to 35 x 35 mm² Applications: 3D Beam Steering; Angular Magnification in Fast Switches; Transmitting Spectral and Angular Selector; Beam Combining; Beam Shaping and Filtering; High-power Spectral Beam Combining