A large capacity time division multiplexed (TDM) laser beam combining technique enabled by nanosecond speed KTN deflector

Stuart (Shizhuo) Yin; Ju-Hung Chao; Wenbin Zhu; Chang-Jiang Chen; Adrian Campbell; Michael Henry; Mark Dubinskiy; Robert C. Hoffman

doi:10.1117/12.2276510

23 August 2017 A large capacity time division multiplexed (TDM) laser beam combining technique enabled by nanosecond speed KTN deflector

Stuart (Shizhuo) Yin, Ju-Hung Chao, Wenbin Zhu, Chang-Jiang Chen, Adrian Campbell, Michael Henry, Mark Dubinskiy, Robert C. Hoffman

Author Affiliations +

Proceedings Volume 10382, Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications XI; 103820P (2017) https://doi.org/10.1117/12.2276510
Event: SPIE Optical Engineering + Applications, 2017, San Diego, California, United States

Abstract

In this paper, we present a novel large capacity (a 1000+ channel) time division multiplexing (TDM) laser beam combining technique by harnessing a state-of-the-art nanosecond speed potassium tantalate niobate (KTN) electro-optic (EO) beam deflector as the time division multiplexer. The major advantages of TDM approach are: (1) large multiplexing capability (over 1000 channels), (2) high spatial beam quality (the combined beam has the same spatial profile as the individual beam), (3) high spectral beam quality (the combined beam has the same spectral width as the individual beam, and (4) insensitive to the phase fluctuation of individual laser because of the nature of the incoherent beam combining. The quantitative analyses show that it is possible to achieve over one hundred kW average power, single aperture, single transverse mode solid state and/or fiber laser by pursuing this innovative beam combining method, which represents a major technical advance in the field of high energy lasers. Such kind of 100+ kW average power diffraction limited beam quality lasers can play an important role in a variety of applications such as laser directed energy weapons (DEW) and large-capacity high-speed laser manufacturing, including cutting, welding, and printing.

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Stuart (Shizhuo) Yin, Ju-Hung Chao, Wenbin Zhu, Chang-Jiang Chen, Adrian Campbell, Michael Henry, Mark Dubinskiy, and Robert C. Hoffman "A large capacity time division multiplexed (TDM) laser beam combining technique enabled by nanosecond speed KTN deflector", Proc. SPIE 10382, Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications XI, 103820P (23 August 2017); https://doi.org/10.1117/12.2276510

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KEYWORDS

Time division multiplexing

Crystals

Laser energy

Multiplexing

Diffraction

Electro optics

High power lasers

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