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http://dx.doi.org/10.3807/KJOP.2019.30.5.187

Fabrication and Output Characteristics of an (18+1)×1 Polarization-maintaining Pump and Signal Combiner for a High-power Fiber Laser  

Lee, Sung Hun (Future Technology R&D-2., LIGNex1)
Kim, Ki Hyuck (Future Technology R&D-2., LIGNex1)
Yang, Hwan Seok (Future Technology R&D-2., LIGNex1)
Cho, Seung Yong (Research Center, LS-tech)
Kim, Seon Ju (Research Center, LS-tech)
Park, Min Kyu (The GTRI-3rd, Agency for Defense Development)
Lee, Jung Hwan (The GTRI-3rd, Agency for Defense Development)
Publication Information
Korean Journal of Optics and Photonics / v.30, no.5, 2019 , pp. 187-192 More about this Journal
Abstract
In this paper a pump combiner, a key component of a high-power fiber laser, was fabricated, and its output characteristics measured using a high-power performance measuring instrument. The $(18+1){\times}1$ pump combiner consists of an optical-fiber bundle of one signal fiber and 18 pump fibers, an output optical fiber, and housing. The signal and output fibers were fabricated using polarization-maintaining optical fiber. By measuring the loss of signal light along the tapering length of the optical-fiber bundle, the tapering length was optimized to 18 mm. Signal-light insertion loss, pump-light transmittance, and polarization extinction ratio of the fabricated $(18+1){\times}1$ pump combiner were measured as 6.5%, 98.07%, and 18.0 dB respectively. The temperature distribution of the pump combiner, at a high power of 2 kW using 18 pump laser diodes, was measured and analyzed using a thermal-imaging camera.
Keywords
High-power fiber laser; Pump combiner; Polarization-maintaining fiber;
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Times Cited By KSCI : 1  (Citation Analysis)
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