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Please use this identifier to cite or link to this item: http://hdl.handle.net/2014/41831

Title: High-reliability pump module for non-planar ring oscillator laser
Authors: Liu, Duncan T.
Qiu, Yueming
Wilson, Daniel W.
Dubovitsky, Serge
Forouhar, Siamak
Keywords: Non-Planar Ring Oscillator (NPRO) laser
laser diode pump module
optical fiber array
micro lens array
reliability
Issue Date: 26-Aug-2007
Publisher: Pasadena, CA : Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2007.
Citation: SPIE International Symposium on Optics & Photonics, San Diego, California, August 26-30, 2007.
Abstract: We propose and have demonstrated a prototype high-reliability pump module for pumping a Non-Planar Ring Oscillator (NPRO) laser suitable for space missions. The pump module consists of multiple fiber-coupled single-mode laser diodes and a fiber array micro-lens array based fiber combiner. The reported Single-Mode laser diode combiner laser pump module (LPM) provides a higher normalized brightness at the combined beam than multimode laser diode based LPMs. A higher brightness from the pump source is essential for efficient NPRO laser pumping and leads to higher reliability because higher efficiency requires a lower operating power for the laser diodes, which in turn increases the reliability and lifetime of the laser diodes. Single-mode laser diodes with Fiber Bragg Grating (FBG) stabilized wavelength permit the pump module to be operated without a thermal electric cooler (TEC) and this further improves the overall reliability of the pump module. The single-mode laser diode LPM is scalable in terms of the number of pump diodes and is capable of combining hundreds of fiber-coupled laser diodes. In the proof-of-concept demonstration, an e-beam written diffractive micro lens array, a custom fiber array, commercial 808nm single mode laser diodes, and a custom NPRO laser head are used. The reliability of the proposed LPM is discussed.
URI: http://hdl.handle.net/2014/41831
Appears in Collections:JPL TRS 1992+

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