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Journal Article
100-Gb/s/λ PAM-4 EAM-integrated DBR-LD Supporting Multiple Sub-Channels within 1.29 μm window
- Authors
- Oh Kee Kwon, Chul Wook Lee, Su Ik Park, Kyoung Su Park, Ki Soo Kim
- Issue Date
- 2023-09
- Citation
- Journal of Lightwave Technology, v.41, no.18, pp.6015-6020
- ISSN
- 0733-8724
- Publisher
- Optical Society of America
- Language
- English
- Type
- Journal Article
- Abstract
- We present a distributed Bragg reflector-laser diode (DBR-LD) monolithically integrated with an electroabsorption modulator (EAM) offering a 100-Gb/s pulse amplitude modulation 4-level (PAM-4) signal per sub-channel under a CWDM window of 1.29 μm. For the integrated structure, the DBR-LD and EAM were implemented using a trenched waveguide in the tuning sections for achieving energy-efficient wavelength-tuning and a deep ridge waveguide with an optimized structure for a 100-Gb/s PAM-4 operation, respectively. The fabricated chip shows a threshold current of approximately 12 mA and a tuning range of greater than 13 nm, which corresponds to a wavelength band capable of supporting 16 channels with a 150-GHz grid, while maintaining a side mode suppression ratio of greater than 40 dB. In dynamic tests, the results show clear 100-Gb/s PAM-4 eye openings with an outer extinction ratio of more than 4 dB and a transmitter dispersion eye closure quaternary of less than 1.5 dB for all measured channels.
- KSP Keywords
- 4-level pulse amplitude modulation(PAM-4), Distributed Bragg reflector, Dynamic test, Electroabsorption modulator(EAM), Extinction Ratio(ER), Laser diode, Optimized structure, Sub-channels, Threshold current, Tuning Range, Wavelength tuning
This work is distributed under the term of Creative Commons License (CCL)
(CC BY)
(CC BY)
