Dual-cavity feedback assisted DFB narrow linewidth laser

Abstract Single longitudinal mode (SLM) distributed feedback (DFB) lasers with a linewidth lower than a few kHz find applications in many coherent detection systems. In this paper, we proposed and experimentally demonstrated a novel method to compress the linewidth of a SLM DFB laser by utilizing a...

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Autores principales:	Shihong Huang, Tao Zhu, Guolu Yin, Tianyi Lan, Fuhui Li, Ligang Huang, Min Liu
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/d8e3f520d3ab42d299952a12c0e9a276
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spelling	oai:doaj.org-article:d8e3f520d3ab42d299952a12c0e9a2762021-12-02T16:06:29ZDual-cavity feedback assisted DFB narrow linewidth laser10.1038/s41598-017-01351-w2045-2322https://doaj.org/article/d8e3f520d3ab42d299952a12c0e9a2762017-04-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-01351-whttps://doaj.org/toc/2045-2322Abstract Single longitudinal mode (SLM) distributed feedback (DFB) lasers with a linewidth lower than a few kHz find applications in many coherent detection systems. In this paper, we proposed and experimentally demonstrated a novel method to compress the linewidth of a SLM DFB laser by utilizing a dual-cavity feedback structure (DCFS). The DCFS first provides optical self-injection feedback to compress the laser linewidth, and then the two feedback lengths are carefully optimized to achieve SLM output via the Vernier principle and the suppression of modes overlapping between two cavities. The linewidthes of 1 MHz and 200 kHz were successfully compressed to ~2.7 and 1.5 kHz with a side mode suppression ratio of 38 and 45 dB, respectively. The stability of the DCFS output power can be controlled within ~0.21%. Our method provides a simple, effective, low cost way to achieve DFB linewidth compression, which will greatly improve the performance of coherent detection systems using DFB laser as sources.Shihong HuangTao ZhuGuolu YinTianyi LanFuhui LiLigang HuangMin LiuNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-7 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Shihong Huang Tao Zhu Guolu Yin Tianyi Lan Fuhui Li Ligang Huang Min Liu Dual-cavity feedback assisted DFB narrow linewidth laser
description	Abstract Single longitudinal mode (SLM) distributed feedback (DFB) lasers with a linewidth lower than a few kHz find applications in many coherent detection systems. In this paper, we proposed and experimentally demonstrated a novel method to compress the linewidth of a SLM DFB laser by utilizing a dual-cavity feedback structure (DCFS). The DCFS first provides optical self-injection feedback to compress the laser linewidth, and then the two feedback lengths are carefully optimized to achieve SLM output via the Vernier principle and the suppression of modes overlapping between two cavities. The linewidthes of 1 MHz and 200 kHz were successfully compressed to ~2.7 and 1.5 kHz with a side mode suppression ratio of 38 and 45 dB, respectively. The stability of the DCFS output power can be controlled within ~0.21%. Our method provides a simple, effective, low cost way to achieve DFB linewidth compression, which will greatly improve the performance of coherent detection systems using DFB laser as sources.
format	article
author	Shihong Huang Tao Zhu Guolu Yin Tianyi Lan Fuhui Li Ligang Huang Min Liu
author_facet	Shihong Huang Tao Zhu Guolu Yin Tianyi Lan Fuhui Li Ligang Huang Min Liu
author_sort	Shihong Huang
title	Dual-cavity feedback assisted DFB narrow linewidth laser
title_short	Dual-cavity feedback assisted DFB narrow linewidth laser
title_full	Dual-cavity feedback assisted DFB narrow linewidth laser
title_fullStr	Dual-cavity feedback assisted DFB narrow linewidth laser
title_full_unstemmed	Dual-cavity feedback assisted DFB narrow linewidth laser
title_sort	dual-cavity feedback assisted dfb narrow linewidth laser
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/d8e3f520d3ab42d299952a12c0e9a276
work_keys_str_mv	AT shihonghuang dualcavityfeedbackassisteddfbnarrowlinewidthlaser AT taozhu dualcavityfeedbackassisteddfbnarrowlinewidthlaser AT guoluyin dualcavityfeedbackassisteddfbnarrowlinewidthlaser AT tianyilan dualcavityfeedbackassisteddfbnarrowlinewidthlaser AT fuhuili dualcavityfeedbackassisteddfbnarrowlinewidthlaser AT liganghuang dualcavityfeedbackassisteddfbnarrowlinewidthlaser AT minliu dualcavityfeedbackassisteddfbnarrowlinewidthlaser
_version_	1718384992248135680

Dual-cavity feedback assisted DFB narrow linewidth laser

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