Ultra-High Extinction Ratio and Low Cross Talk Characteristics of 4-Array Integrated SOA Module with Novel Wavelength-Insensitive Parallel Optical Coupling Scheme

Goji NAKAGAWA  Yutaka KAI  Kyosuke SONE  Setsuo YOSHIDA  Shinsuke TANAKA  Ken MORITO  Susumu KINOSHITA  

Publication
IEICE TRANSACTIONS on Electronics   Vol.E96-C   No.7   pp.1003-1011
Publication Date: 2013/07/01
Online ISSN: 1745-1353
DOI: 10.1587/transele.E96.C.1003
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Section on Recent Advances in Integrated Photonic Devices)
Category: 
Keyword: 
lenses,  optical coupling,  optical module,  semiconductor optical amplifier,  wavelength-insensitive,  

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Summary: 
We have designed and fabricated a compact 4-array integrated SOA module using a novel parallel optical coupling scheme and polarization-insensitive built-in array isolators. We achieved ultra-high On/Off extinction ratio of more than 60 dB and low cross talk of better than -60 dB as well as high-isolation of over 47 dB in wide wavelength ranges. We also developed a wavelength-insensitive parallel optical coupling scheme and an efficient thermal dissipating structure for a 4-array SOA module. We applied these technologies into 4-array SOA module fabrication and demonstrated a uniform optical coupling with the loss variance of 1 dB over the 140-nm wavelength ranges. We also demonstrated simultaneous operation of 300 mA 4 channels with low thermal degradation of the module gain less than 1 dB.