Abstract
This paper presents an experimental and theoretical analysis of Raman amplification of OAM modes i.e. beams carrying orbital angular momentum and spin angular momentum. We show that simple scalar equations are sufficient to describe the Raman interaction between OAM modes when working in a cyclic basis. The equations are similar to those used when considering Raman amplification in conventional fibers used for optical communication. Such fibers are typically single mode and support propagation of LP modes i.e. light that is linearly polarized. In fibers that support propagation of OAM modes as well as in fibers that support propagation of LP modes the scalar equations apply when considering very short- fiber lengths or long fiber lengths, only the proper gain efficiency needs to be used. Here, we discuss the gain efficiency, its material and modal dependencies and we demonstrate that the Raman gain efficiency among OAM modes in comparison with the efficiency among LP modes mainly differs due to a typically larger mode size of OAM modes relative to that of the fundamental LP modes in conventional fibers used for optical communication. In addition, we demonstrate a mode dependent loss in an optical fibers that support propagation of OAM modes.
Original language | English |
---|---|
Title of host publication | Proceedings of 22nd International Conference on Transparent Optical Networks |
Number of pages | 4 |
Publisher | IEEE |
Publication date | 2020 |
ISBN (Print) | 978-1-7281-8424-1 |
DOIs | |
Publication status | Published - 2020 |
Event | 22nd International Conference on Transparent Optical Networks - Virtual event, Bari, Italy Duration: 19 Jul 2020 → 23 Jul 2020 Conference number: 22 https://icton2020.fbk.eu/ https://icton2020.fbk.eu/home |
Conference
Conference | 22nd International Conference on Transparent Optical Networks |
---|---|
Number | 22 |
Location | Virtual event |
Country/Territory | Italy |
City | Bari |
Period | 19/07/2020 → 23/07/2020 |
Internet address |