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Effective Area Enlarged Photonic Crystal Fiber with Quasi-Uniform Air-Hole Structure for High Power Transmission

Takashi MATSUI, Kyozo TSUJIKAWA, Takehisa OKUDA, Nobutomo HANZAWA, Yuto SAGAE, Kazuhide NAKAJIMA, Yasuyuki FUJIYA, Kazuyuki SHIRAKI

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Summary :

We investigate the potential of photonic crystal fiber (PCF) to realize high quality and high-power transmission. We utilize the PCF with a quasi-uniform air-hole structure, and numerically clarify that the quasi-uniform PCF can realize the effective area (Aeff) of about 500µm2 with bending loss comparable with that of a conventional single-mode fiber for telecom use by considering the quasi single-mode transmission. We then apply the quasi-uniform PCF to kW-class high-power beam delivery for the single-mode laser processing. The cross-sectional design of the PCF with the high-power delivery potential of more than 300kW·m is numerically and experimentally revealed. A 10kW single-mode beam at 1070nm is successfully delivered over a 30m-long optical fiber cable containing a fabricated PCF with single-mode class beam quality of M2 =1.7 for the first time.

Publication
IEICE TRANSACTIONS on Communications Vol.E103-B No.4 pp.415-421
Publication Date
2020/04/01
Publicized
2019/10/15
Online ISSN
1745-1345
DOI
10.1587/transcom.2019EBP3100
Type of Manuscript
PAPER
Category
Optical Fiber for Communications

Authors

Takashi MATSUI
  NTT Corporation
Kyozo TSUJIKAWA
  NTT Advanced Technology Corporation
Takehisa OKUDA
  Mitsubishi Heavy Industry Ltd.
Nobutomo HANZAWA
  NTT Corporation
Yuto SAGAE
  NTT Corporation
Kazuhide NAKAJIMA
  NTT Corporation
Yasuyuki FUJIYA
  Mitsubishi Heavy Industry Ltd.
Kazuyuki SHIRAKI
  NTT Advanced Technology Corporation

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