Workshop of Photonics 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.​

Main features

  • 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

Benefits

  • Professional: Every workstation is built for accurate process control using leading hardware solutions
  • Easy-to-use: The system is designed for a simplified FBG writing process
  • Flexible: A single system can be used for different FBG writing techniques
  • Full Support: We will install the workstation at your premises and train your team
  • References: Our systems are installed in a diverse range of businesses, research universities, and organizations
  • 1 Year Warranty: And after-warranty service

FBG writing benefits vs. other methods

  • 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.
  • Nearly no system maintenance costs compared to excimer laser-based system.

Configurations

 

Standard

Advanced

Custom

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/Active

Images

FBG writing in Dual clad fibres

Line by Line (LBL) inscribed FBG top view.

Line by Line (LBL) inscribed FBG rotated view.

 

Point by Point PBP inscribed FBG

Lasers & other Sources