Temporal profiles for measuring threshold of random lasers pumped by ns pulses

Abstract The working threshold is an important parameter to assess the performance of cavity-free random lasers. Here, the temporal profile measurement is proposed as an alternative method to determine the thresholds of the surface plasmon based random lasers pumped by ns pulses based on analyzing t...

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Autores principales:	Xiaoyu Shi, Qing Chang, Junhua Tong, Yunjie Feng, Zhaona Wang, Dahe Liu
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/d5ddf52a086a46d6af7aeed39c085b4e
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spelling	oai:doaj.org-article:d5ddf52a086a46d6af7aeed39c085b4e2021-12-02T16:07:56ZTemporal profiles for measuring threshold of random lasers pumped by ns pulses10.1038/s41598-017-05513-82045-2322https://doaj.org/article/d5ddf52a086a46d6af7aeed39c085b4e2017-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-05513-8https://doaj.org/toc/2045-2322Abstract The working threshold is an important parameter to assess the performance of cavity-free random lasers. Here, the temporal profile measurement is proposed as an alternative method to determine the thresholds of the surface plasmon based random lasers pumped by ns pulses based on analyzing the delay time (t Delay) and rising time (t R) of the emission signal. The obvious and slight inflection points of the curves of t Delay and t R varying with the pump power density are observed as indicators for the thresholds of random lasing and for the transition of lasing mode, respectively. The proposed method supplies consistent values to those supplied by traditional methods in frequency-domain for the random systems with different gain length. The demonstrated temporal profile approaches are free from the spectrometers and may be as a candidate for measuring the threshold of random lasers in ultrafast optics, nonlinear optics and bio-compatible optoelectronic probes.Xiaoyu ShiQing ChangJunhua TongYunjie FengZhaona WangDahe LiuNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-8 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Xiaoyu Shi Qing Chang Junhua Tong Yunjie Feng Zhaona Wang Dahe Liu Temporal profiles for measuring threshold of random lasers pumped by ns pulses
description	Abstract The working threshold is an important parameter to assess the performance of cavity-free random lasers. Here, the temporal profile measurement is proposed as an alternative method to determine the thresholds of the surface plasmon based random lasers pumped by ns pulses based on analyzing the delay time (t Delay) and rising time (t R) of the emission signal. The obvious and slight inflection points of the curves of t Delay and t R varying with the pump power density are observed as indicators for the thresholds of random lasing and for the transition of lasing mode, respectively. The proposed method supplies consistent values to those supplied by traditional methods in frequency-domain for the random systems with different gain length. The demonstrated temporal profile approaches are free from the spectrometers and may be as a candidate for measuring the threshold of random lasers in ultrafast optics, nonlinear optics and bio-compatible optoelectronic probes.
format	article
author	Xiaoyu Shi Qing Chang Junhua Tong Yunjie Feng Zhaona Wang Dahe Liu
author_facet	Xiaoyu Shi Qing Chang Junhua Tong Yunjie Feng Zhaona Wang Dahe Liu
author_sort	Xiaoyu Shi
title	Temporal profiles for measuring threshold of random lasers pumped by ns pulses
title_short	Temporal profiles for measuring threshold of random lasers pumped by ns pulses
title_full	Temporal profiles for measuring threshold of random lasers pumped by ns pulses
title_fullStr	Temporal profiles for measuring threshold of random lasers pumped by ns pulses
title_full_unstemmed	Temporal profiles for measuring threshold of random lasers pumped by ns pulses
title_sort	temporal profiles for measuring threshold of random lasers pumped by ns pulses
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/d5ddf52a086a46d6af7aeed39c085b4e
work_keys_str_mv	AT xiaoyushi temporalprofilesformeasuringthresholdofrandomlaserspumpedbynspulses AT qingchang temporalprofilesformeasuringthresholdofrandomlaserspumpedbynspulses AT junhuatong temporalprofilesformeasuringthresholdofrandomlaserspumpedbynspulses AT yunjiefeng temporalprofilesformeasuringthresholdofrandomlaserspumpedbynspulses AT zhaonawang temporalprofilesformeasuringthresholdofrandomlaserspumpedbynspulses AT daheliu temporalprofilesformeasuringthresholdofrandomlaserspumpedbynspulses
_version_	1718384686760198144

Temporal profiles for measuring threshold of random lasers pumped by ns pulses

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