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Measurement of small chirp-parameter for Mach-Zehnder-type optical modulator |
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| Authors: | Akira Enokihara Tetsuya Kawanishi Yasuyuki Okamura |
| Affiliation: | a Graduate School of Engineering, University of Hyogo, 2167 Shosha, Himeji, Hyogo 671-2280, Japan b National Institute of Information and Communications Technology, 4-2-1 Nukui-Kita, Koganei, Tokyo 184-9795, Japan c Graduate School of Engineering Science, Osaka University, 3-1 Machikaneyama, Toyonaka, Osaka 560-8531, Japan d Tokyo Institute of Technology, Nagatsuda, Midori-ku, Yokohama, Kanagawa 226-8503, Japan |
| Abstract: | A new measurement method of chirp-parameters is proposed for electro-optic (EO) intensity modulators with the Mach-Zehnder (MZ) waveguide interferometer. This method is suitably applied for the measurement of the small chirp with operation at a specific RF-frequency. To determine the chirp-parameter, optical spectrum components of the modulated light are observed with varying the relative optical phase difference between the two arms of the MZ waveguide interferometer. The chirp-parameter of 0.17, which is a value small enough for EO intensity modulation, was successfully measured by the experiment. |
| Keywords: | 42.82.Bq 42.79.Hp 42.82.&minus m |
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