TY - GEN
T1 - Femtosecond inscription of a spectral array of four fiber Bragg gratings at the same spot, using a single uniform phase-mask
AU - Halstuch, A.
AU - Ishaaya, A. A.
N1 - Publisher Copyright:
© 2023 SPIE.
PY - 2023/1/1
Y1 - 2023/1/1
N2 - An array of four fiber Bragg gratings (FBGs) is inscribed at the same spot with a single uniform phase-mask (PM). The inscription setup consists of an 800 nm femtosecond laser, a PM, a defocusing spherical lens and a cylindrical focusing lens. The wavelength tunability of the center Bragg wavelength is achieved by a defocusing lens, and by PM translation. An FBG is inscribed, followed by three cascaded FBGs, which are inscribed exactly at the same spot, only after a movement of the PM. The second order Bragg grating array at ~1.55 µm transmission spectra of these four FBGs is measured, showing a spectral shift of ~1.8 nm between each one, and a total spectral shift of ~5.4 nm. The transmission dip of each FBG is approximately −6 dB. The third order Bragg grating array at ~1.04 µm transmission spectra shows a transmission dip of approximately −3 dB, a wavelength separation of ~1.2 nm between each one, and a total wavelength shift of ~3.6 nm.
AB - An array of four fiber Bragg gratings (FBGs) is inscribed at the same spot with a single uniform phase-mask (PM). The inscription setup consists of an 800 nm femtosecond laser, a PM, a defocusing spherical lens and a cylindrical focusing lens. The wavelength tunability of the center Bragg wavelength is achieved by a defocusing lens, and by PM translation. An FBG is inscribed, followed by three cascaded FBGs, which are inscribed exactly at the same spot, only after a movement of the PM. The second order Bragg grating array at ~1.55 µm transmission spectra of these four FBGs is measured, showing a spectral shift of ~1.8 nm between each one, and a total spectral shift of ~5.4 nm. The transmission dip of each FBG is approximately −6 dB. The third order Bragg grating array at ~1.04 µm transmission spectra shows a transmission dip of approximately −3 dB, a wavelength separation of ~1.2 nm between each one, and a total wavelength shift of ~3.6 nm.
KW - Femtosecond inscription
KW - Fiber Bragg gratings
KW - Fiber Bragg gratings arrays
KW - Optical fibers
UR - http://www.scopus.com/inward/record.url?scp=85170642417&partnerID=8YFLogxK
U2 - 10.1117/12.2665095
DO - 10.1117/12.2665095
M3 - Conference contribution
AN - SCOPUS:85170642417
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - Specialty Optical Fibres
A2 - Kalli, Kyriacos
A2 - Mendez, Alexis
A2 - Peterka, Pavel
PB - SPIE
T2 - Specialty Optical Fibres 2023
Y2 - 24 April 2023 through 25 April 2023
ER -