A Laser Workstation for Fiber Bragg Gratings Writing
FemtoFBG is a laser micromachining workstation optimized for fiber Bragg gratings (FBG) writing. It is a perfect choice for scientific laboratories, R&D centers, and industrial clients working with fiber lasers, distributed sensors, and telecommunications.
Femtosecond FBG writing is a proven technology for universal Bragg Gratings writing in various optical fibers, including not UV-sensitized fibers.
The main advantage of the femtosecond laser writing unlimited length or structure of Bragg grating is not using a phase mask. Femtosecond lasers can be applied for Point-by-Point (PbP) and Line-by-Line (LbL) for up to 2nd order FBGs writing in various optical fibers, including multicore fibers. The smallest pitch in PbP writing is ~1 µm.
Femtosecond FBG writing using a phase mask enables long-term modifications that are impossible with Excimer lasers.
|Micromachining technologies||Direct laser writing||Direct laser writing, Mask writing||The system can include fiber drilling, marking, and other functionalities|
|Laser||Single-wavelength||Dual-wavelength||Design wavelengths/wavelengths can be chosen, including integration of the customer’s provided laser source|
|FBG writing options||Point-by-Point (PbP) writing, Line-by-Line (LbL) writing, Apodized gratings||Point-by-Point (PbP) writing, Line-by-Line (LbL) writing, Apodized gratings, FBGs are written using a phase mask||Optional interferometric technique|
|Fibers||Single-mode fibers, multicore fibers||Versatile||Versatile|
|Maximum fiber diameter||1 mm||Customer’s choice||Customer’s choice|
|Maximum working range||50x50x5||50x100x35||Up to 300×300|
|Flat samples processing||Included||Included||Included|
|Fiber core autofocus||–||Digital||Digital|
|Fiber tension control||–||Included||Holder designed according to individual requirements|
|Polarization control||–||Motorized||Motorized Linear Polarization rotation, Circular, Elliptical, Azimuthal, other|
|Writing||With positioning system||With positioning system and/or scanning unit||Positioning and scanning units can be chosen by the customer|
|Power control||Integrated external control||Integrated external control||Option for real-time pulse energy measurement|
|Vibration control||Passive||Antivibration isolation||Passive/Acitve|
- Direct writing (point-by-point, line-by-line, plane-by-plane)
- Precise reflection/transmission spectrum control
- Direct writing without immersion oil
- Ultra-long FBGs
- Apodized Bragg Gratings
- Variety of optical fibers (single-mode, dual-cladding, multi-core, etc.)
- Femtosecond FBG writing with a phase mask
- Writing through the cladding – no need to strip the fibers before FBG inscription.
- All fiber types – no need for UV photosensitivity.
- Easy process tuning for different gratings – the mask is not required.
- Virtually no system maintenance costs compared to excimer laser-based system.