TY - JOUR
T1 - 75-km SMF transmission of optical 16 QAM signal generated by a monolithic quad-parallel Mach-Zehnder optical modulator
AU - Chiba, Akito
AU - Sakamoto, Takahide
AU - Kawanishi, Tetsuya
AU - Higuma, Kaoru
AU - Sudo, Masaaki
AU - Ichikawa, Junichiro
N1 - Funding Information:
Manuscript received November 14, 2010; revised March 28, 2011; accepted April 24, 2011. Date of publication April 29, 2011; date of current version June 24, 2011. This work was supported in part by JSPS (20760254). A. Chiba was with National Institute of Information Communications Technology (NICT), Koganei-shi, Tokyo 184-8795, Japan (e-mail: akito.chiba@osamember.org). T. Sakamoto and T. Kawanishi are with NICT, Koganei-shi, Tokyo 184-8795, Japan. K. Higuma, M. Sudo, and J. Ichikawa are with New Technology Research Laboratories, Sumitomo Osaka Cement Co. Ltd., Funabashi-shi, Chiba 274-8601, Japan. Color versions of one or more of the figures in this letter are available online at http://ieeexplore.ieee.org. Digital Object Identifier 10.1109/LPT.2011.2148703
PY - 2011
Y1 - 2011
N2 - We demonstrate 75-km single-mode fiber transmission of a 40-Gb/s optical 16-level quadrature amplitude modulation (16QAM) signal generated by a quad-parallel MachZehnder optical modulator (QPMZM), where four MachZehnder structures are embedded in parallel monolithically on a lithium niobate substrate. Owing to the optical 16QAM signal generation method based on the coherent superposition in the QPMZM and improved coherent receiver utilizing digital filters, improvement of receiver sensitivity has been achieved as well. The experimentally obtained receiver sensitivity for near the forward-error correction limit and power penalty due to transmission are experimentally evaluated as 16.3 dB and about 2-3 dB, respectively.
AB - We demonstrate 75-km single-mode fiber transmission of a 40-Gb/s optical 16-level quadrature amplitude modulation (16QAM) signal generated by a quad-parallel MachZehnder optical modulator (QPMZM), where four MachZehnder structures are embedded in parallel monolithically on a lithium niobate substrate. Owing to the optical 16QAM signal generation method based on the coherent superposition in the QPMZM and improved coherent receiver utilizing digital filters, improvement of receiver sensitivity has been achieved as well. The experimentally obtained receiver sensitivity for near the forward-error correction limit and power penalty due to transmission are experimentally evaluated as 16.3 dB and about 2-3 dB, respectively.
KW - Coherent superposition
KW - lithium niobate
KW - monolithic quad-parallel MachZehnder optical modulator (QPMZM)
KW - optical quadrature amplitude modulation (QAM)
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U2 - 10.1109/LPT.2011.2148703
DO - 10.1109/LPT.2011.2148703
M3 - Article
AN - SCOPUS:79959751934
VL - 23
SP - 977
EP - 979
JO - IEEE Photonics Technology Letters
JF - IEEE Photonics Technology Letters
SN - 1041-1135
IS - 14
M1 - 5759068
ER -