Helical distributed feedback fiber Bragg gratings and rocking filters in a 3D printed preform-drawn fiber.
- Publisher:
- OPTICAL SOC AMER
- Publication Type:
- Journal Article
- Citation:
- Optics letters, 2020, 45, (19), pp. 5444-5447
- Issue Date:
- 2020-10
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Using induced UV attenuation across a twisted fiber asymmetric core drawn from a 3D printed preform, linear fiber Bragg gratings (FBGs) are produced on one side of the core. By removing the twist, a helical grating with a period matching the twist rate is produced. Balancing the rate with the polarization beat length in a form birefringent fiber allows the production of a combined rocking filter and FBG device with tunable properties. Direct observation of the fiber grating dispersion within the rocking filter rejection band is possible.
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