Article Synopsis
- The study presents a technique for extracting a specific spatial mode from a light beam while keeping other modes intact, enabling retransmission of new signals on the extracted mode.
- This method is self-aligning, minimizes loss from splitting, and relies on local feedback mechanisms using beam splitters and phase shifters.
- It is adaptable for use with Mach-Zehnder interferometers and can handle multiple mode extractions simultaneously, functioning as a hitless optical add-drop multiplexer for uninterrupted signal transmission.
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Article Abstract
We show how a spatial mode can be extracted from a light beam, leaving the other orthogonal modes undisturbed, and allowing a new signal to be retransmitted on that mode. The method is self-aligning, avoids fundamental splitting losses, and uses only local feedback loops on controllable beam splitters and phase shifters. It could be implemented with Mach-Zehnder interferometers in planar optics. The method can be extended to multiple simultaneous mode extractions. As a spatial reconfigurable optical add-drop multiplexer, it is hitless, allowing reconfiguration without interrupting the transmission of any channel.
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| http://dx.doi.org/10.1364/OE.21.020220 | DOI Listing |
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