Optical Modulator With a Near-Linear Field Response
| العنوان: | Optical Modulator With a Near-Linear Field Response |
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| المؤلفون: | Yutaka Miyamoto, Hiroshi Yamazaki, Hiroto Kawakami, Hiroshi Takahashi, Yasuaki Hashizume, Takashi Goh, Shinji Mino, Takashi Yamada |
| المصدر: | Journal of Lightwave Technology. 34:3796-3802 |
| بيانات النشر: | Institute of Electrical and Electronics Engineers (IEEE), 2016. |
| سنة النشر: | 2016 |
| مصطلحات موضوعية: | Physics, Electro-optic modulator, Linearity, 02 engineering and technology, Optical modulation amplitude, Optical performance monitoring, Optical switch, Atomic and Molecular Physics, and Optics, 020210 optoelectronics & photonics, Optical modulator, Modulation, Optical transistor, 0202 electrical engineering, electronic engineering, information engineering, Electronic engineering |
| الوصف: | The principle and characteristics of a linear optical modulator (LOM), which has a high field-response linearity, are discussed. A conventional Mach–Zehnder modulator (MZM) shows a nonlinear (sinusoidal) field response. This nonlinearity causes some problems in advanced digital coherent optical transmission systems that employ advanced multilevel modulation or pulse-shaping technologies. To solve this, we devised the LOM, which has a two-stage asymmetric lattice configuration with two MZMs driven with a pair of complementary voltage signals. The key idea of the LOM is to utilize the complementary output from the first MZM for generating the compensation signal. This enables us to improve the linearity without losing much optical power. Theoretical characteristics of the LOM are discussed in detail for the first time. To verify the LOM concept, we fabricated a linear in-phase-and-quadrature modulator (LIQM) with a hybrid configuration of silica planar lightwave circuits and a LiNbO3 chip with a high-speed phase-modulator array. Using the LIQM, we experimentally proved that the LOM provides a better loss-linearity trade-off than the conventional MZM does. The LIQM was also tested for 12.5-GBd 16-QAM modulation, and it generated a clear constellation where the nonlinearity of the MZM was compensated well. |
| تدمد: | 1558-2213 0733-8724 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::fec322c0a2376ec923396bc7e7c653e8 https://doi.org/10.1109/jlt.2016.2586113 |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi...........fec322c0a2376ec923396bc7e7c653e8 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 15582213 07338724 |
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