Shaping the spectral response of ultrashort pulse phase mask written fiber Bragg gratings
Year: 2025
Type: article
Abstract: We present an approach to control the spectral profile of ultrashort pulse phase mask written fiber Bragg gratings (FBG) by adding shaping apertures to the inscription scheme. They can have the form of a simple slit aperture, offering control over the grating length and enabling extremely short FBG. Furthermore, the aperture opening relative to the fiber core cross-section can be varied along the fiber propagation axis. This controls the coupling strength along the grating, allowing for e.g. side lobe suppression of constant period FBG or controlling ripples on chirped FBG. Shaping apertures enable a next degree of flexibility for the reliable phase mask inscription technique.
Source: Optics Express
DOI: 10.1364/oe.558398
Authors: Ria G. Krämer, Christian Schmittner, Tobias Ullsperger, Malte P. Siems, Samuel L. Döpfner, Georg R. Schwartz, Daniel Richter, Stefan Nolte
Language: English
Topic: Advanced Fiber Optic Sensors
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,270
OpenAlex ID: W4410354700