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Content Provider | IEEE Xplore Digital Library |
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Author | Gong-Ru Lin Yu-Chieh Chi Yi-Cheng Li Jyehong Chen |
Copyright Year | 1983 |
Abstract | A directly modulated and coherently injection-locked WRC-FPLD transmitter is preliminarily employed to perform the 16-QAM-OFDM data transmission by using an OFDM subcarrier amplitude pre-leveling technique. The maximum transmission bit-rate of 20-Gbit/s is reported by fusing the OFDM subcarrier pre-leveling with the coherent injection-locking techniques in such a directly modulated WRC-FPLD. Without pre-leveling the OFDM subcarrier, the coherently injection-locked L-band WRC-FPLD suppresses its mode-partition noise to improve the EVM of the 16-QAM-OFDM data only from 13.52% to 10.2%. The OFDM subcarrier pre-leveling effectively compensate the finite bandwidth and unflattened modulating response of the injection-locked WRC-FPLD to improve the transmission EVM and SNR performances. The received constellation plot reveals that the EVM and SNR of the back-to-back transmitted 16-QAM-OFDM data are significantly improved to 5.58% and 17 dB, respectively. With the use of both injection-locking and pre-leveling techniques, the directly 16-QAM-OFDM modulated WRC-FPLD transmitter can reach the FEC limited BER of 3.8 × 10-3 at a receiving power sensitivity of -10 dBm. The OFDM subcarrier pre-leveling technique helps the WRC-FPLD to reduce the overall BER of 16-QAM-OFDM data by one order of magnitude, providing a minimum BER of 4.5 × 10-5 at a receiving power of -2 dBm. |
Sponsorship | IEEE Lasers and Electro-Optics Society Optical Society of America |
Starting Page | 1079 |
Ending Page | 1087 |
Page Count | 9 |
File Size | 1472355 |
File Format | |
ISSN | 07338724 |
Volume Number | 31 |
Issue Number | 7 |
Language | English |
Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
Publisher Date | 2013-01-01 |
Publisher Place | U.S.A. |
Access Restriction | One Nation One Subscription (ONOS) |
Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
Subject Keyword | OFDM L-band Bandwidth Optical transmitters Frequency modulation Wavelength division multiplexing weak-resonant-cavity Amplitude pre-leveling coherent injection- locking direct modulation FPLD QAM-OFDM subcarrier transmission |
Content Type | Text |
Resource Type | Article |
Subject | Atomic and Molecular Physics, and Optics |
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