Directly Modulated Tunable Single-Mode Lasers Based on a Coupled Microcavity

In this work, we investigate an alternative directly modulated laser solution with applications to multiwavelength 25 Gb/s systems. The presented solution is based on a hybrid square/rhombus-rectangular laser (HSRRL), which consists of a Fabry–Pérot (FP) cavity and a square/rhombus microcavity (SRM)...

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Published inPhotonics Vol. 9; no. 11; p. 827
Main Authors Wang, Miao-Qing, Hao, You-Zeng, Zhang, Zhen-Ning, Zhang, Bin, Yang, Yue-De, Xiao, Jin-Long, Teixeira, António L., Huang, Yong-Zhen
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.11.2022
Subjects
direct modulated
Etching
Fabry-Perot interferometers
Lasers
microcavity
Organic chemicals
semiconductor lasers
Silicon nitride
Simulation
Single mode operation
single-mode lasers
Wave division multiplexing
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Summary:In this work, we investigate an alternative directly modulated laser solution with applications to multiwavelength 25 Gb/s systems. The presented solution is based on a hybrid square/rhombus-rectangular laser (HSRRL), which consists of a Fabry–Pérot (FP) cavity and a square/rhombus microcavity (SRM). This structure is implemented and demonstrates single-mode lasing over a wide wavelength tuning range (30.8 nm). Single-mode operation is achieved with a side-mode suppression ratio (SMSR) greater than 30 dB and a linewidth of 10 MHz. Furthermore, with an electrical 3 dB bandwidth of 10 GHz. It is possible to directly modulate at 25 Gb/s with promising performance. These devices are simple and they are expected to meet the cost and power requirements of current networks.
ISSN:2304-6732
2304-6732
DOI:10.3390/photonics9110827