High-reliability pump module for non-planar ring oscillator laser

Duncan T. Liu; Yueming Qiu; Daniel W. Wilson; Serge Dubovitsky; Siamak Forouhar

doi:10.1117/12.730898

26 September 2007 High-reliability pump module for non-planar ring oscillator laser

Duncan T. Liu, Yueming Qiu, Daniel W. Wilson, Serge Dubovitsky, Siamak Forouhar

Proceedings Volume 6681, Lidar Remote Sensing for Environmental Monitoring VIII; 66810Z (2007) https://doi.org/10.1117/12.730898
Event: Optical Engineering + Applications, 2007, San Diego, California, United States

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.

Citation Download Citation

Duncan T. Liu, Yueming Qiu, Daniel W. Wilson, Serge Dubovitsky, and Siamak Forouhar "High-reliability pump module for non-planar ring oscillator laser", Proc. SPIE 6681, Lidar Remote Sensing for Environmental Monitoring VIII, 66810Z (26 September 2007); https://doi.org/10.1117/12.730898

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KEYWORDS

Semiconductor lasers

Fiber lasers

Reliability

Multimode fibers

Fiber Bragg gratings

Lasers

Diodes

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