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15 June 2023 Compact spectrometer based on a rotated chirped volume Bragg grating
Murat Yessenov, Oussama Mhibik, Lam Mach, Leonid B. Glebov, Ayman F. Abouraddy, Ivan B. Divliansky
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Proceedings Volume 12516, Next-Generation Spectroscopic Technologies XV; 125160H (2023) https://doi.org/10.1117/12.2675674
Event: SPIE Defense + Commercial Sensing, 2023, Orlando, Florida, United States
Abstract
We introduce a compact spectrometer based on a new optical component – rotated chirped volume Bragg grating (r-CBG) – with a compact footprint capable of spatially resolving the spectrum without the need for subsequent free-space propagation. Unlike conventional chirped Bragg gratings in which both the length and width of the device increase with operation bandwidth, the link between the length and width of r-CBG is severed, leading to a significantly reduced footprint for the same bandwidth. We fabricate and characterize such a device of total volume 25x6x6 mm3 in multiple spectral windows, we study their spectral resolution, and via FROG measurements we confirm that a pair of cascaded r-CBGs can resolve and combine the spectrum of a 100-fs pulse.
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Murat Yessenov, Oussama Mhibik, Lam Mach, Leonid B. Glebov, Ayman F. Abouraddy, and Ivan B. Divliansky "Compact spectrometer based on a rotated chirped volume Bragg grating", Proc. SPIE 12516, Next-Generation Spectroscopic Technologies XV, 125160H (15 June 2023); https://doi.org/10.1117/12.2675674
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KEYWORDS
Spectroscopy
Volume Bragg gratings
Ultrafast phenomena
Miniaturization
Optical components
Prisms
Spectral resolution
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