3 December 2014 Measuring high-frequency responses of an electro-optic phase modulator based on dispersion induced phase modulation to intensity modulation conversion
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Abstract
We investigate the phase modulation to intensity modulation conversion in dispersive fibers for measuring frequency responses of electro-optic phase modulators, and demonstrate two typical measurements with cascade path and fold-back path. The measured results achieve an uncertainty of less than 2.8% within 20 GHz. Our measurements show stable and repeatable results because the optical carrier and its phase-modulated sidebands are affected by the same fiber impairments. The proposed method requires only dispersive fibers and works without any small-signal assumption, which is applicable for swept frequency measurement at different driving levels and operating wavelengths.
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Shangjian Zhang, Heng Wang, Yani Wang, Xinhai Zou, Yali Zhang, Shuang Liu, Yong Liu, "Measuring high-frequency responses of an electro-optic phase modulator based on dispersion induced phase modulation to intensity modulation conversion", Proc. SPIE 9267, Semiconductor Lasers and Applications VI, 92670H (3 December 2014); doi: 10.1117/12.2070833; https://doi.org/10.1117/12.2070833
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