Enhanced switching speeds observed at 980 nm in neodymium-doped twin core fiber, using stimulated down-pumping at 1060 nm

John W. Arkwright; Bin Wu; Iain M. Skinner; Pak Lim Chu

doi:10.1117/12.168605

15 February 1994 Enhanced switching speeds observed at 980 nm in neodymium-doped twin-core fiber using stimulated down-pumping at 1060 nm

John W. Arkwright, Bin Wu, Iain M. Skinner, Pak Lim Chu

Author Affiliations +

Proceedings Volume 2073, Fiber Laser Sources and Amplifiers V; (1994) https://doi.org/10.1117/12.168605
Event: Optical Tools for Manufacturing and Advanced Automation, 1993, Boston, MA, United States

Abstract

In this presentation, preliminary observations and measurements of increased switching speeds in resonantly enhanced nonlinear systems are shown. The method uses stimulated down- pumping of the ⁴F_3/2 metastable state in neodymium, but is applicable to any four- level system, or pseudo-four-level system such as erbium. Since the stimulated down-pumping is only initiated at the end of each switching period, the lifetime of the metastable state is not affected. Thus high up-pumping efficiencies are still possible. This allows both low power operation and fast relaxation to be achieved in the same switching system. The relaxation time has been reduced from approximately 390 microsecond(s) to less than 120 microsecond(s) , and it is shown that the reduction is dependent on the power of the down-pumping source.

Citation Download Citation

John W. Arkwright, Bin Wu, Iain M. Skinner, and Pak Lim Chu "Enhanced switching speeds observed at 980 nm in neodymium-doped twin-core fiber using stimulated down-pumping at 1060 nm", Proc. SPIE 2073, Fiber Laser Sources and Amplifiers V, (15 February 1994); https://doi.org/10.1117/12.168605

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