Open AccessUltracompact Lens‐Less “Spectrometer in Fiber” Based on Chirped Filament‐Array Gratings
Author(s) -
Rahnama Abdullah,
Mahmoud Aghdami Keivan,
Kim Young Hwan,
Herman Peter R.
Publication year - 2020
Publication title -
advanced photonics research
Language(s) - English
Resource type - Journals
ISSN - 2699-9293
DOI - 10.1002/adpr.202070004
Subject(s) - optics , femtosecond , materials science , spectrometer , cladding (metalworking) , fiber bragg grating , phosfos , protein filament , lens (geology) , optical fiber , laser , optoelectronics , plastic optical fiber , physics , fiber optic sensor , metallurgy , composite material
All‐Fiber Spectrometers In article number 2000026 , Abdullah Rahnama and coworkers have harnessed femtosecond laser writing of high aspect ratio filament tracks to form fiber Bragg gratings in single‐mode optical fiber. The filament geometry favored radiative emission into narrow azimuthal zones outside of the cladding by first‐order Bragg diffraction. A chirped filament array enabled lens‐less focusing, to define a compact all‐fiber spectrometer with a moderately high 0.3 nm resolution for light spanning the full visible spectrum.