A Chirp-Managed Tunable DBR Laser Based on Novel Cascaded Gratings

A Chirp-Managed Tunable DBR Laser Based on Novel Cascaded Gratings

In this paper, a novel tunable DBR laser based on novel cascaded gratings is proposed for chirp management in high-speed direct modulation applications. The cascaded gratings, i.e., a tilted π phase-shift grating followed by a normal uniform Bragg grating, can provide a narrow-band reflec...

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Bibliographic Details
Main Authors: Yao Zhu, Congying Feng, Yuze Wu, Yonglin Yu
Format: Article
Language:English
Published: IEEE 2018-01-01
Series:IEEE Photonics Journal
Subjects:
Tunable laser
gratings
direct modulation
chirp management.
Online Access:https://ieeexplore.ieee.org/document/8468990/
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spelling doaj-bc1522a650cb4341aa1263e6f79b8ff12021-03-29T17:48:32ZengIEEEIEEE Photonics Journal1943-06552018-01-0110511010.1109/JPHOT.2018.28715138468990A Chirp-Managed Tunable DBR Laser Based on Novel Cascaded GratingsYao Zhu0https://orcid.org/0000-0003-4145-4669Congying Feng1Yuze Wu2Yonglin Yu3https://orcid.org/0000-0002-2422-7774Wuhan National Laboratory for Optoelectronics, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, ChinaWuhan National Laboratory for Optoelectronics, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, ChinaWuhan National Laboratory for Optoelectronics, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, ChinaWuhan National Laboratory for Optoelectronics, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, ChinaIn this paper, a novel tunable DBR laser based on novel cascaded gratings is proposed for chirp management in high-speed direct modulation applications. The cascaded gratings, i.e., a tilted π phase-shift grating followed by a normal uniform Bragg grating, can provide a narrow-band reflection spectrum with a sharp falling slope on the longer wavelength side, so that the optical spectrum shaping and the detuned-loading effects can be enhanced. Simulation results indicate that the wavelength tuning range of the laser is about 10 nm and the 3-dB modulation bandwidth reaches up to 25 GHz. By simply adjusting the phase current and thus changing the detuned frequency, the extinction ratio and the frequency chirp can be optimized, which is helpful to improve the dispersion tolerance and reduce the dispersion power penalty.https://ieeexplore.ieee.org/document/8468990/Tunable lasergratingsdirect modulationchirp management.
collection DOAJ
language English
format Article
sources DOAJ
author Yao Zhu
Congying Feng
Yuze Wu
Yonglin Yu
spellingShingle Yao Zhu
Congying Feng
Yuze Wu
Yonglin Yu
A Chirp-Managed Tunable DBR Laser Based on Novel Cascaded Gratings
IEEE Photonics Journal
Tunable laser
gratings
direct modulation
chirp management.
author_facet Yao Zhu
Congying Feng
Yuze Wu
Yonglin Yu
author_sort Yao Zhu
title A Chirp-Managed Tunable DBR Laser Based on Novel Cascaded Gratings
title_short A Chirp-Managed Tunable DBR Laser Based on Novel Cascaded Gratings
title_full A Chirp-Managed Tunable DBR Laser Based on Novel Cascaded Gratings
title_fullStr A Chirp-Managed Tunable DBR Laser Based on Novel Cascaded Gratings
title_full_unstemmed A Chirp-Managed Tunable DBR Laser Based on Novel Cascaded Gratings
title_sort chirp-managed tunable dbr laser based on novel cascaded gratings
publisher IEEE
series IEEE Photonics Journal
issn 1943-0655
publishDate 2018-01-01
description In this paper, a novel tunable DBR laser based on novel cascaded gratings is proposed for chirp management in high-speed direct modulation applications. The cascaded gratings, i.e., a tilted π phase-shift grating followed by a normal uniform Bragg grating, can provide a narrow-band reflection spectrum with a sharp falling slope on the longer wavelength side, so that the optical spectrum shaping and the detuned-loading effects can be enhanced. Simulation results indicate that the wavelength tuning range of the laser is about 10 nm and the 3-dB modulation bandwidth reaches up to 25 GHz. By simply adjusting the phase current and thus changing the detuned frequency, the extinction ratio and the frequency chirp can be optimized, which is helpful to improve the dispersion tolerance and reduce the dispersion power penalty.
topic Tunable laser
gratings
direct modulation
chirp management.
url https://ieeexplore.ieee.org/document/8468990/
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