Facet reflectivity of a spot-size-converter integrated semiconductor optical amplifier

Author

Shim, Jongin ; Kim, Jongryeol ; Jang, Donghoon ; Eo, Yungseon ; Arai, Shigehisa

Author_Institution

Dept. of Electr. & Comput. Eng., Hanyang Univ., Kyungki, South Korea

Volume

38

Issue

6

fYear

2002

fDate

6/1/2002 12:00:00 AM

Firstpage

665

Lastpage

673

Abstract

Traveling-wave type semiconductor optical amplifiers (SOAs) integrated with a spot-size-converter (SSC) are extensively studied for improvement of coupling efficiency with single-mode fibers and for cost reduction in packaging. In this paper, the structural dependence of the SSC on effective facet reflectivity R_eff is investigated theoretically and experimentally. It is shown that, not only sufficient mode-conversion in the SSC region, but also the introduction of angled facets, are essential for reducing R_eff. A small gain ripple (less than 0.1 dB) in an amplified spontaneous emission (ASE) spectrum, fiber-to-fiber gain of 26 dB, and saturation output power of 7 dBm are observed for the fabricated SOA, which consists of a window length of 20 μm, facet angle of 7°, and anti-reflection coated facet of less than 1% reflectivity

Keywords

antireflection coatings; integrated optics; laser modes; optical fibre couplers; reflectivity; semiconductor optical amplifiers; superradiance; 20 micron; 26 dB; amplified spontaneous emission spectrum; angled facets; anti-reflection coated facet; facet angle; facet reflectivity; fiber-to-fiber gain; gain ripple; mode-conversion; packaging cost reduction; saturation output power; single-mode fiber coupling efficiency; spot-size-converter integrated semiconductor optical amplifier; structural dependence; traveling-wave type semiconductor optical amplifiers; window length; Coatings; Costs; Optical amplifiers; Optical fiber polarization; Optical films; Packaging; Power amplifiers; Power generation; Reflectivity; Semiconductor optical amplifiers;

fLanguage

English

Journal_Title

Quantum Electronics, IEEE Journal of

Publisher

ieee

ISSN

0018-9197

Type

jour

DOI

10.1109/JQE.2002.1005417

Filename

1005417