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Fabrication of 4 x 1 signal combiner for high-power lasers using hydrofluoric acid

Title
Fabrication of 4 x 1 signal combiner for high-power lasers using hydrofluoric acid
Author
김지원
Keywords
FIBER LASER; TAPERED FIBER; HIGH-EFFICIENCY; KW; AMPLIFIER; ARRAY; PUMP
Issue Date
2018-11
Publisher
OPTICAL SOC AMER
Citation
OPTICS EXPRESS, v. 26, No. 23, Page. 30667-30677
Abstract
We report a new method to fabricate a 4 x 1 signal combiner that comprises an output fiber port and a tapered fused bundle (TFB) with four input fiber ports. The TFB is etched in a solution of hydrofluoric acid and spliced with an output fiber of core diameter 105 mu m and cladding diameter 125 mu m. Each cladding of the four input optical fiber is etched to approximately 72.5 mu m. The etched TFB was fabricated by tapering after forming a bundle of four etched optical fibers. Subsequently, the 4 x 1 signal combiner is fabricated by fusion splicing between the fabricated TFB and output optical fiber with a numerical aperture of 0.15. The efficiency of each port of the fabricated 4 x 1 signal combiner is in the range of 93.3-98.3%. When an optical power of approximately 624.5 W was input to the signal combiner, the maximum output was similar to 612 W and the efficiency was similar to 98%. The beam quality factor, M-2 is measured to be approximately 14.6, which is calculated as the beam parameter product (BPP) of 5.02 mm.mrad. (C) 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
URI
https://www.osapublishing.org/oe/abstract.cfm?uri=oe-26-23-30667#articleBodyhttps://repository.hanyang.ac.kr/handle/20.500.11754/98782
ISSN
1094-4087
DOI
10.1364/OE.26.030667
Appears in Collections:
COLLEGE OF SCIENCE AND CONVERGENCE TECHNOLOGY[E](과학기술융합대학) > PHOTONICS AND NANOELECTRONICS(나노광전자학과) > Articles
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