Long-Term Thermal Stability of Single-Mode VCSEL Under 96-Gbit/s OFDM Transmission

Thermal-dependent transmission performance and long-term stability of a single-transverse-mode (SM) vertical-cavity surface-emitting laser (VCSEL) with directly pre-leveled 16-quadrature amplitude modulation orthogonal frequency-division multiplexing (16-QAM OFDM) data over 100 m OM4 multi-mode-fibe...

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Published in:IEEE journal of selected topics in quantum electronics 2019-11, Vol.25 (6), p.1-9
Main Authors: Kao, Hsuan-Yun, Cheng, Wood-Hi, Wu, Chao-Hsin, Lin, Gong-Ru, Tsai, Cheng-Ting, Chi, Yu-Chieh, Peng, Chun-Yen, Leong, Shan-Fong, Wang, Huai-Yung, Cheng, Chih-Hsien, Wu, Wei-Li, Kuo, Hao-Chung
Format: Article
Language:English
Subjects:
Apertures
Bandwidth
Data center
Data transmission
Frequency division multiplexing
Modulation
multi-mode fiber
OFDM
Optimization
Orthogonal Frequency Division Multiplexing
QAM-OFDM
Quadrature amplitude modulation
Resistance
single mode
Surface stability
temperature control
Thermal stability
Threshold currents
VCSEL
Vertical cavity surface emission lasers
Vertical cavity surface emitting lasers
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creator Kao, Hsuan-Yun
Cheng, Wood-Hi
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Tsai, Cheng-Ting
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Leong, Shan-Fong
Wang, Huai-Yung
Cheng, Chih-Hsien
Wu, Wei-Li
Kuo, Hao-Chung
description Thermal-dependent transmission performance and long-term stability of a single-transverse-mode (SM) vertical-cavity surface-emitting laser (VCSEL) with directly pre-leveled 16-quadrature amplitude modulation orthogonal frequency-division multiplexing (16-QAM OFDM) data over 100 m OM4 multi-mode-fiber (MMF) are demonstrated. Although narrowing the oxide-confined aperture to 3 μm enables the SM VCSEL with low threshold current of 0.21 mA and high modulation bandwidth of 21.4 GHz, this technology also enlarges the insulating oxide area to accumulate the heat for raising core temperature. This induces a harsh environment as the core temperature persistently increases without dissipation even under the water-cooling control at 20 °C. As a result, the SM VCSEL can only guarantee a stable operation for 1.5 h under the encoding of QAM-OFDM data for transmission. After optimization, the SM VCSEL successfully supports a back-to-back transmission capacity as high as 96 Gbit/s. With the assistance of OFDM pre-leveling technique, the 96-Gbit/s QAM-OFDM data transmission is qualified over 100 m OM4 MMF with a receiving power penalty as low as 1.3 dB.
doi_str_mv 10.1109/JSTQE.2019.2908554
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Although narrowing the oxide-confined aperture to 3 μm enables the SM VCSEL with low threshold current of 0.21 mA and high modulation bandwidth of 21.4 GHz, this technology also enlarges the insulating oxide area to accumulate the heat for raising core temperature. This induces a harsh environment as the core temperature persistently increases without dissipation even under the water-cooling control at 20 °C. As a result, the SM VCSEL can only guarantee a stable operation for 1.5 h under the encoding of QAM-OFDM data for transmission. After optimization, the SM VCSEL successfully supports a back-to-back transmission capacity as high as 96 Gbit/s. 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subjects Apertures
Bandwidth
Data center
Data transmission
Frequency division multiplexing
Modulation
multi-mode fiber
OFDM
Optimization
Orthogonal Frequency Division Multiplexing
QAM-OFDM
Quadrature amplitude modulation
Resistance
single mode
Surface stability
temperature control
Thermal stability
Threshold currents
VCSEL
Vertical cavity surface emission lasers
Vertical cavity surface emitting lasers
title Long-Term Thermal Stability of Single-Mode VCSEL Under 96-Gbit/s OFDM Transmission
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