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Updated: Dec 14, 2025

20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier
Published on: July 12, 2017
Orbital-angular-momentum-amplifying helical vector modes in Yb3+-doped three-core twisted microstructure fiber
A new helical ytterbium-doped fiber amplifier generates and transmits orbital angular momentum (OAM) beams. This fiber supports multiple OAM modes, advancing quantum communication and dense space division multiplexing.
Area of Science:
- Optics and Photonics
- Quantum Communication Technologies
- Fiber Optics
Background:
- Orbital angular momentum (OAM) beams offer potential for advanced communication systems.
- Generating and transmitting OAM beams efficiently remains a challenge.
- Yb3+-doped fibers are known for their amplification properties.
Purpose of the Study:
- To propose and experimentally validate a helical Yb3+-doped three-core microstructure fiber (YTMF) amplifier.
- To investigate the capability of YTMF for generating and amplifying OAM beams.
- To explore the potential of YTMF in quantum communication and dense space division multiplexing.
Main Methods:
- Fabrication of a YTMF with a helical structure and three Yb3+-doped cores.
- Experimental amplification of a 1064nm laser using the YTMF.
- Theoretical analysis of supported modes and OAM carrying capacity at 1064nm.
- Experimental verification of OAM mode transmission (1, 2, and 3 orders).
Main Results:
- The YTMF successfully amplified the 1064nm laser.
- Theoretical analysis confirmed the YTMF supports nine OAM-carrying modes at 1064nm.
- Experimental results verified the transmission of 1, 2, and 3-order OAM modes.
Conclusions:
- The helical Yb3+-doped fiber amplifier effectively generates and amplifies OAM beams.
- The combination of doped materials and helical structure is favorable for OAM generation and amplification.
- This technology provides a foundation for developing OAM beams in quantum communication and dense space division multiplexing.
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