Semiconductor optical amplifier array coupled to uncoated flat-end fibers with integrated beam expanders and TiO/sub 2/ antireflection coatings
| Autor: | Uziel Koren, Barry Miller, S.C. Shunk, Chih-Hsiao Chen, K.F. Dreyer, M. Chien, R.G. Ahrens, H.M. Presby |
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| Rok vydání: | 1997 |
| Předmět: |
Optical amplifier
Coupling loss Materials science business.industry Amplifier engineering.material Atomic and Molecular Physics and Optics law.invention Full width at half maximum Anti-reflective coating Optics Coating law engineering Beam expander Electrical and Electronic Engineering business Refractive index |
| Zdroj: | IEEE Journal of Selected Topics in Quantum Electronics. 3:1421-1428 |
| ISSN: | 1077-260X |
| DOI: | 10.1109/2944.658797 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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