Transmission of 20  Gb/s PAM-4 signal over 20  km optical fiber using a directly modulated tunable DBR laser

Daibing Zhou; Dan Lu; Song Liang; Lingjuan Zhao; Wei Wang

doi:doi:10.3788/COL201816.091401

Chinese Optics Letters, 2018, 16 (9): 091401, Published Online: Sep. 6, 2018

Transmission of 20 Gb/s PAM-4 signal over 20 km optical fiber using a directly modulated tunable DBR laser

Daibing Zhou Dan Lu Song Liang Lingjuan Zhao ^*Wei Wang

Author Affiliations

Key Laboratory of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences, College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing Key Laboratory of Low Dimensional Semiconductor Materials and Devices, Beijing 100083, China

Figures & Tables

Fig. 4. S21 curve of the InGaAlAs DBR laser at 25°C when the gain section, phase section, and DBR section were biased at 100, 0, and 0 mA, respectively.

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Fig. 5. Wavelength tuning properties of InGaAlAs DBR lasers at 25°C.

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Fig. 6. Typical optical spectra obtained from the InGaAlAs DBR lasers at 25°C.

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Fig. 7. Experimental setup used to measure the PAM-4 transmission characteristics of the tunable DBR laser.

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Fig. 8. PAM-4 eye diagrams of tunable DBR laser for BTB, 10 km, and 20 km transmission when the tuned wavelength is (a) 1559.8 nm, (b) 1555.7 nm, (c) 1552.4 nm, and (d) 1548.3 nm.

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Fig. 9. 20 Gb/s PAM-4 BER performance of tunable DBR laser for BTB, 10 km, and 20 km transmission when the tuned wavelength is 1559.8 nm.

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Daibing Zhou, Dan Lu, Song Liang, Lingjuan Zhao, Wei Wang. Transmission of 20 Gb/s PAM-4 signal over 20 km optical fiber using a directly modulated tunable DBR laser[J]. Chinese Optics Letters, 2018, 16(9): 091401.

Transmission of 20 Gb/s PAM-4 signal over 20 km optical fiber using a directly modulated tunable DBR laser

Fig. 1. Schematic view of the tunable DBR laser.

Fig. 2. Optical image of the packaged laser.

Fig. 3. Light-current characteristic of the InGaAlAs DBR lasers at 25°C.

Fig. 4. S21 curve of the InGaAlAs DBR laser at 25°C when the gain section, phase section, and DBR section were biased at 100, 0, and 0 mA, respectively.

Fig. 5. Wavelength tuning properties of InGaAlAs DBR lasers at 25°C.

Fig. 6. Typical optical spectra obtained from the InGaAlAs DBR lasers at 25°C.

Fig. 7. Experimental setup used to measure the PAM-4 transmission characteristics of the tunable DBR laser.

Fig. 8. PAM-4 eye diagrams of tunable DBR laser for BTB, 10 km, and 20 km transmission when the tuned wavelength is (a) 1559.8 nm, (b) 1555.7 nm, (c) 1552.4 nm, and (d) 1548.3 nm.

Fig. 9. 20 Gb/s PAM-4 BER performance of tunable DBR laser for BTB, 10 km, and 20 km transmission when the tuned wavelength is 1559.8 nm.

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Transmission of 20 Gb/s PAM-4 signal over 20 km optical fiber using a directly modulated tunable DBR laser

Fig. 1. Schematic view of the tunable DBR laser.

Fig. 2. Optical image of the packaged laser.

Fig. 3. Light-current characteristic of the InGaAlAs DBR lasers at 25°C.

Fig. 4. S21 curve of the InGaAlAs DBR laser at 25°C when the gain section, phase section, and DBR section were biased at 100, 0, and 0 mA, respectively.

Fig. 5. Wavelength tuning properties of InGaAlAs DBR lasers at 25°C.

Fig. 6. Typical optical spectra obtained from the InGaAlAs DBR lasers at 25°C.

Fig. 7. Experimental setup used to measure the PAM-4 transmission characteristics of the tunable DBR laser.

Fig. 8. PAM-4 eye diagrams of tunable DBR laser for BTB, 10 km, and 20 km transmission when the tuned wavelength is (a) 1559.8 nm, (b) 1555.7 nm, (c) 1552.4 nm, and (d) 1548.3 nm.

Fig. 9. 20 Gb/s PAM-4 BER performance of tunable DBR laser for BTB, 10 km, and 20 km transmission when the tuned wavelength is 1559.8 nm.

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