Ultracompact Lens‐Less “Spectrometer in Fiber” Based on Chirped Filament‐Array Gratings
Femtosecond laser irradiation is applied to a single‐mode optical fiber to embed a filament array through the silica cladding and guiding core and form chirped Bragg gratings. Unlike a planar‐shaped refractive index modification, the long and uniform filament facilitates efficient optical scattering into azimuthally narrowed radiation modes, external and transverse to the fiber cladding. Chirping of the grating period further provides spectral focusing. The combined spectral and azimuthal focusing permits lens‐less recording of bright and high‐resolution spectra spanning across most of the visible band with a low‐cost charged coupled device camera. The flexible point‐by‐point writing enables fiber tapping of light with engineered spectral and geometric focusing properties, permitting the design of new compact photonic devices based on the all‐fiber spectrometer.
- Location
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Deutsche Nationalbibliothek Frankfurt am Main
- Extent
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Online-Ressource
- Language
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Englisch
- Bibliographic citation
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Ultracompact Lens‐Less “Spectrometer in Fiber” Based on Chirped Filament‐Array Gratings ; volume:1 ; number:2 ; year:2020 ; extent:6
Advanced photonics research ; 1, Heft 2 (2020) (gesamt 6)
- Creator
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Rahnama, Abdullah
Mahmoud Aghdami, Keivan
Kim, Young Hwan
Herman, Peter R.
- DOI
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10.1002/adpr.202000026
- URN
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urn:nbn:de:101:1-2022052707415378940988
- Rights
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Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
- Last update
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15.08.2025, 7:23 AM CEST
Data provider
Deutsche Nationalbibliothek. If you have any questions about the object, please contact the data provider.
Associated
- Rahnama, Abdullah
- Mahmoud Aghdami, Keivan
- Kim, Young Hwan
- Herman, Peter R.
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The development of an array acousto optical spectrometer
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Optical fiber speckle spectrometer based on reversed-lens smartphone microscope
Multi-lens array full-field X-ray microscopy
The gratings manual
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Laser induced dynamic gratings
Electromagnetic theory of gratings
Laser interferometry with gratings
Nanoscale polarization transient gratings