Shaping of nanosecond pulses in ytterbium fiber lasers by synchronous sine-wave pump modulation

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Shaping of nanosecond pulses in ytterbium fiber lasers by synchronous sine-wave pump modulation. / Smirnov, S. V.; Nyushkov, B. N.; Ivanenko, A. V. et al.

In: Journal of the Optical Society of America B: Optical Physics, Vol. 37, No. 10, 01.10.2020, p. 3068-3076.

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

BibTeX

@article{ec91d65a18a04ed9855cca19aefc589e,

title = "Shaping of nanosecond pulses in ytterbium fiber lasers by synchronous sine-wave pump modulation",

abstract = "In this work, we discovered the possibility of greatly relaxing requirements to the speed and dynamic range of pump power variation and, thus, of reducing synchronous pumping of ytterbium (Yb)-based fiber lasers to a very simple pump modulation yielding a mode-locked pulsed output. We show that even slow (microsecond-scale) low-index (≤0.5) sine-wave synchronous modulation of the pump power can result in shaping of a regular train of nanosecond laser pulses. It is revealed that the energy-conservative process of laser pulse shortening against the pump modulation period can take place in the quasi–two-level laser active medium owing to mistiming-induced gain discrimination of the temporal laser pulse profile. Thus, nanosecond pulses with energy up to 50 nJ were obtained in our experimental all-fiber Yb-based laser configuration. Our theoretical modeling reveals routes to much stronger pulse shortening through tunable pump modulation parameters. This discovery allows the establishment of more reliable and easy-to-implement high-efficiency alternatives to other types of high-energy ultralong mode-locked fiber lasers.",

keywords = "HIGH-ENERGY, DISSIPATIVE SOLITONS, REPETITION-RATE, GENERATION, POWER, OSCILLATOR, REGIMES, CW",

author = "Smirnov, {S. V.} and Nyushkov, {B. N.} and Ivanenko, {A. V.} and Kolker, {D. B.} and Kobtsev, {S. M.}",

year = "2020",

month = oct,

day = "1",

doi = "10.1364/JOSAB.402985",

language = "English",

volume = "37",

pages = "3068--3076",

journal = "Journal of the Optical Society of America B: Optical Physics",

issn = "0740-3224",

publisher = "OPTICAL SOC AMER",

number = "10",

}

RIS

TY - JOUR

T1 - Shaping of nanosecond pulses in ytterbium fiber lasers by synchronous sine-wave pump modulation

AU - Smirnov, S. V.

AU - Nyushkov, B. N.

AU - Ivanenko, A. V.

AU - Kolker, D. B.

AU - Kobtsev, S. M.

PY - 2020/10/1

Y1 - 2020/10/1

N2 - In this work, we discovered the possibility of greatly relaxing requirements to the speed and dynamic range of pump power variation and, thus, of reducing synchronous pumping of ytterbium (Yb)-based fiber lasers to a very simple pump modulation yielding a mode-locked pulsed output. We show that even slow (microsecond-scale) low-index (≤0.5) sine-wave synchronous modulation of the pump power can result in shaping of a regular train of nanosecond laser pulses. It is revealed that the energy-conservative process of laser pulse shortening against the pump modulation period can take place in the quasi–two-level laser active medium owing to mistiming-induced gain discrimination of the temporal laser pulse profile. Thus, nanosecond pulses with energy up to 50 nJ were obtained in our experimental all-fiber Yb-based laser configuration. Our theoretical modeling reveals routes to much stronger pulse shortening through tunable pump modulation parameters. This discovery allows the establishment of more reliable and easy-to-implement high-efficiency alternatives to other types of high-energy ultralong mode-locked fiber lasers.

AB - In this work, we discovered the possibility of greatly relaxing requirements to the speed and dynamic range of pump power variation and, thus, of reducing synchronous pumping of ytterbium (Yb)-based fiber lasers to a very simple pump modulation yielding a mode-locked pulsed output. We show that even slow (microsecond-scale) low-index (≤0.5) sine-wave synchronous modulation of the pump power can result in shaping of a regular train of nanosecond laser pulses. It is revealed that the energy-conservative process of laser pulse shortening against the pump modulation period can take place in the quasi–two-level laser active medium owing to mistiming-induced gain discrimination of the temporal laser pulse profile. Thus, nanosecond pulses with energy up to 50 nJ were obtained in our experimental all-fiber Yb-based laser configuration. Our theoretical modeling reveals routes to much stronger pulse shortening through tunable pump modulation parameters. This discovery allows the establishment of more reliable and easy-to-implement high-efficiency alternatives to other types of high-energy ultralong mode-locked fiber lasers.

KW - HIGH-ENERGY

KW - DISSIPATIVE SOLITONS

KW - REPETITION-RATE

KW - GENERATION

KW - POWER

KW - OSCILLATOR

KW - REGIMES

KW - CW

UR - http://www.scopus.com/inward/record.url?scp=85094322439&partnerID=8YFLogxK

U2 - 10.1364/JOSAB.402985

DO - 10.1364/JOSAB.402985

M3 - Article

AN - SCOPUS:85094322439

VL - 37

SP - 3068

EP - 3076

JO - Journal of the Optical Society of America B: Optical Physics

JF - Journal of the Optical Society of America B: Optical Physics

SN - 0740-3224

IS - 10

ER -

ID: 25841401