Ultra-short beam expander with segmented curvature control: the emergence of a semi-lens
Abstract
We introduce direct curvature control in designing a segmented beam expander, and explore novel design possibilities for ultra-compact beam expanders. Assisted by the particle swarm optimization algorithm, we search for an optimal curvature-controlled multi-segment taper that maintains width continuity. Counterintuitively, the optimization yields a structure with abrupt width discontinuity and width compression features. Through spatial phase and parameterized analysis, a semi-lens feature is revealed that helps to flatten the wavefront at the output end for higher coupling efficiency. Such functionality cannot be achieved by normal tapers in a short distance. The structure is fabricated and characterized experimentally. By a figure of merit that accounts for expansion ratio, length, and efficiency, this structure outperforms an adiabatic taper by 9 times.
- Authors:
-
[1];
- Rutgers Univ., Piscataway, NJ (United States)
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Publication Date:
- Research Org.:
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1425021
- Alternate Identifier(s):
- OSTI ID: 1402098
- Report Number(s):
- BNL-200002-2018-JAAM
Journal ID: ISSN 0146-9592; OPLEDP
- Grant/Contract Number:
- SC0012704
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Optics Letters
- Additional Journal Information:
- Journal Volume: 42; Journal Issue: 21; Journal ID: ISSN 0146-9592
- Publisher:
- Optical Society of America (OSA)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 77 NANOSCIENCE AND NANOTECHNOLOGY
Citation Formats
Abbaslou, Siamak, Gatdula, Robert, Lu, Ming, Stein, Aaron, and Jiang, Wei. Ultra-short beam expander with segmented curvature control: the emergence of a semi-lens. United States: N. p., 2017.
Web. doi:10.1364/OL.42.004383.
Abbaslou, Siamak, Gatdula, Robert, Lu, Ming, Stein, Aaron, & Jiang, Wei. Ultra-short beam expander with segmented curvature control: the emergence of a semi-lens. United States. https://doi.org/10.1364/OL.42.004383
Abbaslou, Siamak, Gatdula, Robert, Lu, Ming, Stein, Aaron, and Jiang, Wei. Sun .
"Ultra-short beam expander with segmented curvature control: the emergence of a semi-lens". United States. https://doi.org/10.1364/OL.42.004383. https://www.osti.gov/servlets/purl/1425021.
@article{osti_1425021,
title = {Ultra-short beam expander with segmented curvature control: the emergence of a semi-lens},
author = {Abbaslou, Siamak and Gatdula, Robert and Lu, Ming and Stein, Aaron and Jiang, Wei},
abstractNote = {We introduce direct curvature control in designing a segmented beam expander, and explore novel design possibilities for ultra-compact beam expanders. Assisted by the particle swarm optimization algorithm, we search for an optimal curvature-controlled multi-segment taper that maintains width continuity. Counterintuitively, the optimization yields a structure with abrupt width discontinuity and width compression features. Through spatial phase and parameterized analysis, a semi-lens feature is revealed that helps to flatten the wavefront at the output end for higher coupling efficiency. Such functionality cannot be achieved by normal tapers in a short distance. The structure is fabricated and characterized experimentally. By a figure of merit that accounts for expansion ratio, length, and efficiency, this structure outperforms an adiabatic taper by 9 times.},
doi = {10.1364/OL.42.004383},
journal = {Optics Letters},
number = 21,
volume = 42,
place = {United States},
year = {Sun Jan 01 00:00:00 EST 2017},
month = {Sun Jan 01 00:00:00 EST 2017}
}
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Works referencing / citing this record:
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- Luque‐González, José Manuel; Halir, Robert; Wangüemert‐Pérez, Juan Gonzalo
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