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Thermally expanded core fiber with high numerical aperture for laser‐diode coupling
Author(s) -
Lin YuCheng,
Lin SanChien
Publication year - 2006
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.21539
Subject(s) - numerical aperture , core (optical fiber) , tec , materials science , fiber , optics , laser diode , diode , radius , microwave , optical fiber , coupling (piping) , laser , coupling loss , aperture (computer memory) , optoelectronics , physics , composite material , telecommunications , engineering , wavelength , structural engineering , ionosphere , astronomy , computer science , computer security
A thermally expanded core fiber with high numerical aperture (HNA‐TEC) is demonstrated here to relax the tolerance of laser diode (LD) to fiber alignment. We experimentally clarify the dependence of mode field radius (MFR) on heating time for HNA‐TEC fiber. The MFR was expanded at the increasing rate of 0.067 μm/minute on the condition of 1100°C heat treatment. For a HNA‐TEC fiber with MFR 4.56 μm, the transverse and axial coupling tolerances were enlarged effectively by about 81% and 50%, respectively. © 2006 Wiley Periodicals, Inc. Microwave Opt Technol Lett 48: 979–981, 2006; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.21539.