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Superposition of Polarized Doughnut Beams Using Acoustically Induced Fiber Grating
- Source :
- Journal of Lightwave Technology; September 2024, Vol. 42 Issue: 17 p6070-6076, 7p
- Publication Year :
- 2024
-
Abstract
- We demonstrate an acoustically induced fiber grating (AIFG) modulated by acoustic flexural wave propagating along polarization-maintaining fiber (PMF). At the wavelength of dispersion turnaround points (TAPs), the linearly polarized LP<subscript>01</subscript> mode converts to four non-degenerate LP<subscript>11</subscript> modes (LP<subscript>11ax</subscript>, LP<subscript>11bx</subscript>, LP<subscript>11ay</subscript>, and LP<subscript>11by</subscript>) with a 3-dB bandwidth spanning from 37.7 to 50.1 nm. Furthermore, the tunable wavelength range extends beyond 300 nm. Our investigation explores the correlation between acoustic polarization and the coupling strength of orthogonal modes (LP<subscript>11a</subscript> and LP<subscript>11b</subscript>). Optimized configurations of AIFG structure facilitate efficient excitation of both LP<subscript>11a</subscript> and LP<subscript>11b</subscript> modes concurrently. Through manipulating optical polarization direction of the input light and the application of dual acoustic optical interactions (AOIs) in the PMF, the incoherent superposition between LP<subscript>11a</subscript> and LP<subscript>11b</subscript> modes generates doughnut-shaped hollow beams with polarization superposition. This approach holds potential applications in particle manipulation, material processing, and communication systems.
Details
- Language :
- English
- ISSN :
- 07338724 and 15582213
- Volume :
- 42
- Issue :
- 17
- Database :
- Supplemental Index
- Journal :
- Journal of Lightwave Technology
- Publication Type :
- Periodical
- Accession number :
- ejs67219481
- Full Text :
- https://doi.org/10.1109/JLT.2024.3407065