Low-cost diode arrays for the LIFE project

Ryan Feeler; Jeremy Junghans; Ed Stephens

doi:10.1117/12.873861

18 February 2011 Low-cost diode arrays for the LIFE project

Ryan Feeler, Jeremy Junghans, Ed Stephens

Proceedings Volume 7916, High Power Lasers for Fusion Research; 791608 (2011) https://doi.org/10.1117/12.873861
Event: SPIE LASE, 2011, San Francisco, California, United States

Abstract

One of the primary challenges of the Laser Inertial Fusion Engine (LIFE) project is the cost and availability of the laser diode arrays needed to pump the solid-state laser gain media in the system. Current projections indicate that the arrays need to be available for approximately one cent per Watt of output power, which is one to two orders of magnitude cheaper than currently available. This work focuses on potential manufacturing approaches to meet the projected specifications of the LIFE project. Special attention will be paid to requirements related to power density (25 kW/cm²), bar pitch (150 - 400 microns), output wavelength (87x), and fast-axis divergence (+/- 4 degrees). A summary of the supply limitations and cost ramifications of each requirement is presented. Also discussed are potential supply chain limitations that are anticipated as a result of the immense size of the LIFE project.

Citation Download Citation

Ryan Feeler, Jeremy Junghans, and Ed Stephens "Low-cost diode arrays for the LIFE project", Proc. SPIE 7916, High Power Lasers for Fusion Research, 791608 (18 February 2011); https://doi.org/10.1117/12.873861

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