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Characteristics of lensed fiber collimator with larger gradient‐index lens diameter
Author(s) -
Lin YuCheng
Publication year - 2009
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.24211
Subject(s) - collimator , optics , lens (geology) , fiber , insertion loss , displacement (psychology) , divergence (linguistics) , materials science , wavelength , optical fiber , microwave , physics , psychology , linguistics , philosophy , composite material , psychotherapist , quantum mechanics
Abstract A lensed fiber collimator using gradient‐index fiber (GIF) of 140 μm diameter spliced to single‐mode fiber (SMF) is reported. The complex beam parameter method and ABCD law are applied for theoretical analysis. Both numerical and experimental data are presented for optical characterization of the divergence angle and insertion loss in lateral and axial displacement of the device. The divergence angle of 2.7° is obtained for the wavelength of 1.31 and 1.55 μm at the GIF length of 425 μm. The variation of insertion loss because of lateral and axial displacement shows good agreement with theory. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 1137–1139, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24211