A Compound-Cavity Distributed Feedback Laser With Bandwidth Over 50 GHz Based on Uniform Gratings

We present a two-segment compound-cavity directly-modulated 1577 nm distributed feedback (DFB) laser based on identical epitaxial layer (IEL) scheme and uniform gratings. The laser exhibits a small-signal 3-dB bandwidth exceeding 50 GHz, and a modulation rate of 144 Gbps is implemented via four-leve...

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Veröffentlicht in:	IEEE photonics technology letters 2024-12, Vol.36 (24), p.1437-1440
Hauptverfasser:	Dou, Zhipeng, Wang, Jian, Sun, Changzheng, Xiong, Bing, Hao, Zhibiao, Wang, Lai, Han, Yanjun, Li, Hongtao, Gan, Lin, Luo, Yi
Format:	Artikel
Sprache:	eng
Schlagworte:	1577 nm 800GbE Bandwidth Bandwidths Compound-cavity direct modulation Distributed feedback devices distributed feedback laser Distributed feedback lasers Frequency modulation Gratings identical epitaxial layer Laser applications Laser feedback Modulation PAM-4 operation Pulse amplitude modulation uniform gratings Vertical cavity surface emitting lasers
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Beschreibung
Zusammenfassung:	We present a two-segment compound-cavity directly-modulated 1577 nm distributed feedback (DFB) laser based on identical epitaxial layer (IEL) scheme and uniform gratings. The laser exhibits a small-signal 3-dB bandwidth exceeding 50 GHz, and a modulation rate of 144 Gbps is implemented via four-level pulse-amplitude modulation (PAM-4) format. The eye diagrams remain open after transmission through 2.5 km single-mode fiber (SMF), demonstrating a great potential for 800 GbE applications or even higher data rates.
ISSN:	1041-1135 1941-0174
DOI:	10.1109/LPT.2024.3434623