Type IIa Bragg gratings formed in microfibers

Area of Science:

• Materials Science
• Optical Engineering
• Photonics

Background:

• Type IIa Bragg gratings are crucial optical components.
• Microfiber fabrication presents unique challenges for grating inscription.
• Germanium-doped fibers offer enhanced photosensitivity.

Purpose of the Study:

• To develop an efficient method for Type IIa Bragg grating fabrication in microfibers.
• To achieve high-temperature resistant fiber gratings.
• To investigate the influence of microfiber diameter on grating formation.

Main Methods:

• Inscribing Type IIa Bragg gratings into germanium-doped multimode microfibers.
• Utilizing the photosensitivity of the microfiber core.
• Controlling microfiber diameter and tension-strain effects during fabrication.

Main Results:

• Successful inscription of Type IIa Bragg gratings into microfibers.
• Demonstrated acceleration of grating formation by reducing microfiber diameter.
• Achieved fiber gratings with 800°C temperature resistance.

Conclusions:

• Microfiber diameter reduction enhances Type IIa Bragg grating formation.
• This method offers an efficient route to high-temperature resistant fiber gratings.
• The germanium-doped core is key to achieving photosensitivity at the microscale.