NDLI: Semiconductor optical amplifier array coupled to uncoated flat-end fibers with integrated beam expanders and TiO/sub 2/ antireflection coatings

Content Provider	IEEE Xplore Digital Library
Author	Chih-Hsiao Chen Shunk, S.C. Koren, U. Chien, M. Miller, B.I. Dreyer, K.F. Presby, H.M. Ahrens, R.G.
Copyright Year	1995
Abstract	We present a novel coupling scheme consisting of an integrated beam expander, a specifically tailored TiO/sub 2/ antireflection coating, optical index matching gel, and uncoated flat-end single-mode fiber (SMF). This scheme was used to package four-channel semiconductor optical amplifier arrays. Far-field profiles for each discrete amplifier in the array are typically 80 and 150 FWHM, perpendicular and parallel to the junction plane, respectively. The TiO/sub 2/ AR coating overcomes the indices mismatching of fiber glass and InP based device, and reduce optical reflection to 0.002% at 1.55 /spl mu/m. Misalignment tolerance in the l-dB excess loss range, for a discrete channel, is typically 5 /spl mu/m vertically and 8 /spl mu/m laterally. The average coupling loss is 4.3 dB per facet for the devices measured. Fiber coupled small signal gain for the amplifiers is typically 11.6 dB and a saturation output power of 3.0 dBm. The method of characterization and optimization of the TiO/sub 2/ coating is discussed.
Sponsorship	IEEE Lasers and Electro-Optics Society
Starting Page	1421
Ending Page	1428
Page Count	8
File Size	173742
File Format	PDF
ISSN	1077260X
Volume Number	3
Issue Number	6
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1997-12-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Optical arrays Semiconductor optical amplifiers Optical coupling Coatings Optical fiber devices Optical losses Power amplifiers Integrated optics Stimulated emission Optical saturation
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Electrical and Electronic Engineering

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