64QAM Modulator With a Hybrid Configuration of Silica PLCs and LiNbO 3 Phase Modulators
Quadrature amplitude modulation (QAM) is a promising approach for increasing the spectral efficiency of wavelength-division-multiplexing transmission, but its optical implementation is challenging. We demonstrate a 64-level QAM (64QAM) modulator, which uses a signal synthesis in the optical domain....
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| Veröffentlicht in: | IEEE photonics technology letters 2010-03, Vol.22 (5), p.344-346 |
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| container_end_page | 346 |
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| container_issue | 5 |
| container_start_page | 344 |
| container_title | IEEE photonics technology letters |
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| creator | Yamazaki, Hiroshi Yamada, Takashi Goh, Takashi Sakamaki, Yohei Kaneko, Akimasa |
| description | Quadrature amplitude modulation (QAM) is a promising approach for increasing the spectral efficiency of wavelength-division-multiplexing transmission, but its optical implementation is challenging. We demonstrate a 64-level QAM (64QAM) modulator, which uses a signal synthesis in the optical domain. We achieved an integration of low-loss asymmetric couplers and three quadrature-phase-shift-keying modulation circuits using a hybrid configuration of silica-based planar lightwave circuits and an array of LiNbO 3 phase modulators. The modulator successfully operated at 60 Gb/s (10 Gbaud). |
| doi_str_mv | 10.1109/LPT.2009.2039748 |
| format | Article |
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| ispartof | IEEE photonics technology letters, 2010-03, Vol.22 (5), p.344-346 |
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| language | eng |
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| source | IEEE Electronic Library (IEL) |
| subjects | Arrays Circuits Conferences Fiber optics Modulation Modulators Optical fibers Spectra |
| title | 64QAM Modulator With a Hybrid Configuration of Silica PLCs and LiNbO 3 Phase Modulators |
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