Ultrashort gain-switched pulse trains from laser diodes characterized by a single-shot up-conversion time microscope

Ryo Tamaki; Masataka Kobayashi; Aoi Maeshiro; Hidekazu Nakamae; Changsu Kim; Takashi Ito; Shaoqiang Chen; Jun Takeda; Hidefumi Akiyama; Ikufumi Katayama

doi:10.35848/1882-0786/ade848

Ultrashort gain-switched pulse trains from laser diodes characterized by a single-shot up-conversion time microscope

Ryo Tamaki, Masataka Kobayashi, Aoi Maeshiro, Hidekazu Nakamae, Changsu Kim, Takashi Ito, Shaoqiang Chen, Jun Takeda, Hidefumi Akiyama, Ikufumi Katayama^*

^*Corresponding author for this work

School of Communication and Electronic Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

Ultrashort pulse profiles from a gain-switched laser diode (GS-LD) were investigated using an up-conversion time microscope, which enables single-shot detection of ultrashort pulses from the GS-LD in the time domain. Sum-frequency generation between the positively chirped readout pulses and the negatively chirped GS-LD output pulses revealed partially-mode-locked characteristics of the GS pulses. The pulse trains, with a temporal width below 0.9 ps and a periodic interval of 5.3 ps, were confirmed to be consistent with their interferometric autocorrelation trace. The demonstrated single-shot measurements of ultrashort pulse profiles elucidate pulse-to-pulse characteristics in the time domain with sub-picosecond time resolution.

Original language	English
Article number	072002
Journal	Applied Physics Express
Volume	18
Issue number	7
DOIs	https://doi.org/10.35848/1882-0786/ade848
State	Published - 1 Jul 2025

Keywords

chirped-pulse
gain-switched laser diode
single-shot spectroscopy
up-conversion

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10.35848/1882-0786/ade848

Cite this

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title = "Ultrashort gain-switched pulse trains from laser diodes characterized by a single-shot up-conversion time microscope",

abstract = "Ultrashort pulse profiles from a gain-switched laser diode (GS-LD) were investigated using an up-conversion time microscope, which enables single-shot detection of ultrashort pulses from the GS-LD in the time domain. Sum-frequency generation between the positively chirped readout pulses and the negatively chirped GS-LD output pulses revealed partially-mode-locked characteristics of the GS pulses. The pulse trains, with a temporal width below 0.9 ps and a periodic interval of 5.3 ps, were confirmed to be consistent with their interferometric autocorrelation trace. The demonstrated single-shot measurements of ultrashort pulse profiles elucidate pulse-to-pulse characteristics in the time domain with sub-picosecond time resolution.",

keywords = "chirped-pulse, gain-switched laser diode, single-shot spectroscopy, up-conversion",

author = "Ryo Tamaki and Masataka Kobayashi and Aoi Maeshiro and Hidekazu Nakamae and Changsu Kim and Takashi Ito and Shaoqiang Chen and Jun Takeda and Hidefumi Akiyama and Ikufumi Katayama",

note = "Publisher Copyright: {\textcopyright} 2025 The Author(s). Published on behalf of The Japan Society of Applied Physics by IOP Publishing Ltd.",

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doi = "10.35848/1882-0786/ade848",

language = "英语",

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T1 - Ultrashort gain-switched pulse trains from laser diodes characterized by a single-shot up-conversion time microscope

AU - Tamaki, Ryo

AU - Kobayashi, Masataka

AU - Maeshiro, Aoi

AU - Nakamae, Hidekazu

AU - Kim, Changsu

AU - Ito, Takashi

AU - Chen, Shaoqiang

AU - Takeda, Jun

AU - Akiyama, Hidefumi

AU - Katayama, Ikufumi

PY - 2025/7/1

Y1 - 2025/7/1

N2 - Ultrashort pulse profiles from a gain-switched laser diode (GS-LD) were investigated using an up-conversion time microscope, which enables single-shot detection of ultrashort pulses from the GS-LD in the time domain. Sum-frequency generation between the positively chirped readout pulses and the negatively chirped GS-LD output pulses revealed partially-mode-locked characteristics of the GS pulses. The pulse trains, with a temporal width below 0.9 ps and a periodic interval of 5.3 ps, were confirmed to be consistent with their interferometric autocorrelation trace. The demonstrated single-shot measurements of ultrashort pulse profiles elucidate pulse-to-pulse characteristics in the time domain with sub-picosecond time resolution.

AB - Ultrashort pulse profiles from a gain-switched laser diode (GS-LD) were investigated using an up-conversion time microscope, which enables single-shot detection of ultrashort pulses from the GS-LD in the time domain. Sum-frequency generation between the positively chirped readout pulses and the negatively chirped GS-LD output pulses revealed partially-mode-locked characteristics of the GS pulses. The pulse trains, with a temporal width below 0.9 ps and a periodic interval of 5.3 ps, were confirmed to be consistent with their interferometric autocorrelation trace. The demonstrated single-shot measurements of ultrashort pulse profiles elucidate pulse-to-pulse characteristics in the time domain with sub-picosecond time resolution.

KW - chirped-pulse

KW - gain-switched laser diode

KW - single-shot spectroscopy

KW - up-conversion

UR - https://www.scopus.com/pages/publications/105010625045

U2 - 10.35848/1882-0786/ade848

DO - 10.35848/1882-0786/ade848

M3 - 文章

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SN - 1882-0778

VL - 18

JO - Applied Physics Express

JF - Applied Physics Express

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M1 - 072002

ER -

Ultrashort gain-switched pulse trains from laser diodes characterized by a single-shot up-conversion time microscope

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Keywords

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