Peculiar Characteristics of Amplification and Noise for Intensity Modulated Light in Semiconductor Optical Amplifier | Zendy

Kazuki Higuchi | Zendy; Nobuhito Takeuchi | Zendy; Minoru Yamada | Zendy

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Peculiar Characteristics of Amplification and Noise for Intensity Modulated Light in Semiconductor Optical Amplifier

Author(s) -

Kazuki Higuchi,

Nobuhito Takeuchi,

Minoru Yamada

Publication year - 2014

Publication title -

ieice transactions on electronics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.182

H-Index - 48

eISSN - 1745-1353

pISSN - 0916-8524

DOI - 10.1587/transele.e97.c.1093

Subject(s) - optical amplifier , relative intensity noise , optics , noise (video) , amplification factor , intensity (physics) , amplifier , signal (programming language) , noise power , semiconductor laser theory , intensity modulation , semiconductor , signal to noise ratio (imaging) , optoelectronics , laser , materials science , physics , power (physics) , phase noise , phase modulation , cmos , artificial intelligence , computer science , image (mathematics) , quantum mechanics , programming language

Amplification characteristics of the signal and the noise in the semiconductor optical amplifier (SOA), without facet mirrors for the intensity modulated light, are theoretically analyzed and experimentally confirmed. We have found that the amplification factor of the temporarily varying intensity component is smaller than that of the continuous wave (CW) component, but increases up to that of the CW component in the high frequency region in the SOA. These properties are very peculiar in the SOA, which is not shown in conventional electronic devices and semiconductor lasers. Therefore, the relative intensity noise (RIN), which is defined as ratio of the square value of the intensity fluctuation to that of the CW power can be improved by the amplification by the SOA. On the other hand, the signal to the noise ratio (S/N ratio) defined for ratio of the square value of the modulated signal power to that of the intensity fluctuation have both cases of the degradation and the improvement by the amplification depending on combination of the modulation and the noise frequencies. Experimental confirmations of these peculiar characteristics are also demonstrated

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