Reciprocity-induced symmetry in the round-trip transmission through complex systems
Reciprocity is a fundamental principle of wave physics and directly relates to the symmetry in the transmission through a system when interchanging the input and output. The coherent transmission matrix (TM) is a convenient method to characterize wave transmission through general media. Here, we dem...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
AIP Publishing LLC
2020-10-01
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| Series: | APL Photonics |
| Online Access: | http://dx.doi.org/10.1063/5.0021285 |
| _version_ | 1818286520695521280 |
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| author | Szu-Yu Lee Vicente J. Parot Brett E. Bouma Martin Villiger |
| author_facet | Szu-Yu Lee Vicente J. Parot Brett E. Bouma Martin Villiger |
| author_sort | Szu-Yu Lee |
| collection | DOAJ |
| description | Reciprocity is a fundamental principle of wave physics and directly relates to the symmetry in the transmission through a system when interchanging the input and output. The coherent transmission matrix (TM) is a convenient method to characterize wave transmission through general media. Here, we demonstrate the optical reciprocal nature of complex media by exploring their TM properties. We measured phase-corrected TMs of forward and round-trip propagation in a single polarization state through a looped 1 m-long step-index optical multimode fiber (MMF) to experimentally verify a transpose relationship between the forward and backward transmission. This symmetry impedes straightforward MMF calibration from proximal measurements of the round-trip TM. Furthermore, we show how focusing through the MMF with digital optical phase conjugation is compromised by system loss since time reversibility relies on power conservation. These insights may inform the development of new imaging techniques through complex media and coherent control of waves in photonic systems. |
| first_indexed | 2024-12-13T01:25:54Z |
| format | Article |
| id | doaj.art-0e6ade3e5b91420cba7d761b5874a0b8 |
| institution | Directory Open Access Journal |
| issn | 2378-0967 |
| language | English |
| last_indexed | 2024-12-13T01:25:54Z |
| publishDate | 2020-10-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | APL Photonics |
| spelling | doaj.art-0e6ade3e5b91420cba7d761b5874a0b82022-12-22T00:04:08ZengAIP Publishing LLCAPL Photonics2378-09672020-10-01510106104106104-1010.1063/5.0021285Reciprocity-induced symmetry in the round-trip transmission through complex systemsSzu-Yu Lee0Vicente J. Parot1Brett E. Bouma2Martin Villiger3Harvard Medical School and Massachusetts General Hospital, Wellman Center for Photomedicine, Boston, Massachusetts 02114, USAHarvard Medical School and Massachusetts General Hospital, Wellman Center for Photomedicine, Boston, Massachusetts 02114, USAHarvard Medical School and Massachusetts General Hospital, Wellman Center for Photomedicine, Boston, Massachusetts 02114, USAHarvard Medical School and Massachusetts General Hospital, Wellman Center for Photomedicine, Boston, Massachusetts 02114, USAReciprocity is a fundamental principle of wave physics and directly relates to the symmetry in the transmission through a system when interchanging the input and output. The coherent transmission matrix (TM) is a convenient method to characterize wave transmission through general media. Here, we demonstrate the optical reciprocal nature of complex media by exploring their TM properties. We measured phase-corrected TMs of forward and round-trip propagation in a single polarization state through a looped 1 m-long step-index optical multimode fiber (MMF) to experimentally verify a transpose relationship between the forward and backward transmission. This symmetry impedes straightforward MMF calibration from proximal measurements of the round-trip TM. Furthermore, we show how focusing through the MMF with digital optical phase conjugation is compromised by system loss since time reversibility relies on power conservation. These insights may inform the development of new imaging techniques through complex media and coherent control of waves in photonic systems.http://dx.doi.org/10.1063/5.0021285 |
| spellingShingle | Szu-Yu Lee Vicente J. Parot Brett E. Bouma Martin Villiger Reciprocity-induced symmetry in the round-trip transmission through complex systems APL Photonics |
| title | Reciprocity-induced symmetry in the round-trip transmission through complex systems |
| title_full | Reciprocity-induced symmetry in the round-trip transmission through complex systems |
| title_fullStr | Reciprocity-induced symmetry in the round-trip transmission through complex systems |
| title_full_unstemmed | Reciprocity-induced symmetry in the round-trip transmission through complex systems |
| title_short | Reciprocity-induced symmetry in the round-trip transmission through complex systems |
| title_sort | reciprocity induced symmetry in the round trip transmission through complex systems |
| url | http://dx.doi.org/10.1063/5.0021285 |
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