Specific Application Fiber Bragg Gratings

AMS item number: SW11875

Wavelength 600-2300 nm; Bandwidth 0.1-1.2 nm; Reflectivity 0.5-99.9%; SLSR ~8, ~10 dB; Fiber... more

Product information "Specific Application Fiber Bragg Gratings"

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

Product Group:

Specific Application Fiber Bragg Gratings

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