Scalable all-fiber coherent beam combination using digital control

Christian Freier; Samuel Legge; Lyle Roberts; Paul B. Wigley; John D. Close; Kyle S. Hardman

doi:10.1364/AO.456360

Scalable all-fiber coherent beam combination using digital control

Christian Freier, Samuel Legge^*, Lyle Roberts, Paul B. Wigley, John D. Close, Kyle S. Hardman

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

7 Citations (Scopus)

Abstract

This paper describes a filled-aperture coherent beam combining (CBC) system based on locking of optical coherence via single-detector electronic-frequency tagging (LOCSET). The sensing and control architecture is implemented using a field-programmable gate array and high-bandwidth electro-optic phase modulators. The all-fiber optical configuration consists of a narrowlinewidth 1560nmseed laser separated into three channels, each containing 7 W erbium-doped fiber amplifiers. The system was demonstrated experimentally, achieving a total stabilized output power of 20W, a combination efficiency greater than 95%, and an output RMS phase stability of λ/493. As this architecture employs an entirely digital sensing and control scheme based on LOCSET, it presents a highly scalable and cost-effective solution for CBC that is wavelength agnostic and can support an arbitrarily large number of channels.

Original language	English
Pages (from-to)	4543-4548
Number of pages	6
Journal	Applied Optics
Volume	61
Issue number	15
DOIs	https://doi.org/10.1364/AO.456360
Publication status	Published - 20 May 2022

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title = "Scalable all-fiber coherent beam combination using digital control",

abstract = "This paper describes a filled-aperture coherent beam combining (CBC) system based on locking of optical coherence via single-detector electronic-frequency tagging (LOCSET). The sensing and control architecture is implemented using a field-programmable gate array and high-bandwidth electro-optic phase modulators. The all-fiber optical configuration consists of a narrowlinewidth 1560nmseed laser separated into three channels, each containing 7 W erbium-doped fiber amplifiers. The system was demonstrated experimentally, achieving a total stabilized output power of 20W, a combination efficiency greater than 95%, and an output RMS phase stability of λ/493. As this architecture employs an entirely digital sensing and control scheme based on LOCSET, it presents a highly scalable and cost-effective solution for CBC that is wavelength agnostic and can support an arbitrarily large number of channels.",

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AU - Freier, Christian

AU - Legge, Samuel

AU - Roberts, Lyle

AU - Wigley, Paul B.

AU - Close, John D.

AU - Hardman, Kyle S.

PY - 2022/5/20

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AB - This paper describes a filled-aperture coherent beam combining (CBC) system based on locking of optical coherence via single-detector electronic-frequency tagging (LOCSET). The sensing and control architecture is implemented using a field-programmable gate array and high-bandwidth electro-optic phase modulators. The all-fiber optical configuration consists of a narrowlinewidth 1560nmseed laser separated into three channels, each containing 7 W erbium-doped fiber amplifiers. The system was demonstrated experimentally, achieving a total stabilized output power of 20W, a combination efficiency greater than 95%, and an output RMS phase stability of λ/493. As this architecture employs an entirely digital sensing and control scheme based on LOCSET, it presents a highly scalable and cost-effective solution for CBC that is wavelength agnostic and can support an arbitrarily large number of channels.

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Scalable all-fiber coherent beam combination using digital control

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