Nanosecond Q-switched operation of coupled Yb and Tm fibre lasers

Yuen Hong Tsang; Fadi Qamar; Terence A. King; Do Kyeong Ko; Jongmin Lee

doi:10.1088/0022-3727/38/9/007

Nanosecond Q-switched operation of coupled Yb and Tm fibre lasers

Yuen Hong Tsang, Fadi Qamar, Terence A. King, Do Kyeong Ko, Jongmin Lee

Research output: Journal article publication › Journal article › Academic research › peer-review

6 Citations (Scopus)

Abstract

A small scale coupled Yb-silica and Tm-silica fibre laser system is described with output at 1.9 μm and with Q-switching using an acousto-optic modulator and also by mechanical optical modulation. The Yb-fibre laser pump source exhibited strong self-pulsation with high-intensity pulses due to stimulated Brillouin scattering. But regular Q-switched pulses were generated from the Tm-fibre laser with an energy of ∼2.4μJ and duration (FWHM) of ∼280 ns for modulation frequencies of 1-20 kHz when using acousto-optic modulation. The main effects that limit the Q-switched pulse peak power are the onset of gain-switched pulsing during the low-Q state and strong pump excited state absorption.

Original language	English
Pages (from-to)	1365-1370
Number of pages	6
Journal	Journal of Physics D: Applied Physics
Volume	38
Issue number	9
DOIs	https://doi.org/10.1088/0022-3727/38/9/007
Publication status	Published - 7 May 2005
Externally published	Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Acoustics and Ultrasonics
Surfaces, Coatings and Films

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10.1088/0022-3727/38/9/007

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abstract = "A small scale coupled Yb-silica and Tm-silica fibre laser system is described with output at 1.9 μm and with Q-switching using an acousto-optic modulator and also by mechanical optical modulation. The Yb-fibre laser pump source exhibited strong self-pulsation with high-intensity pulses due to stimulated Brillouin scattering. But regular Q-switched pulses were generated from the Tm-fibre laser with an energy of ∼2.4μJ and duration (FWHM) of ∼280 ns for modulation frequencies of 1-20 kHz when using acousto-optic modulation. The main effects that limit the Q-switched pulse peak power are the onset of gain-switched pulsing during the low-Q state and strong pump excited state absorption.",

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AU - Tsang, Yuen Hong

AU - Qamar, Fadi

AU - King, Terence A.

AU - Ko, Do Kyeong

AU - Lee, Jongmin

PY - 2005/5/7

Y1 - 2005/5/7

N2 - A small scale coupled Yb-silica and Tm-silica fibre laser system is described with output at 1.9 μm and with Q-switching using an acousto-optic modulator and also by mechanical optical modulation. The Yb-fibre laser pump source exhibited strong self-pulsation with high-intensity pulses due to stimulated Brillouin scattering. But regular Q-switched pulses were generated from the Tm-fibre laser with an energy of ∼2.4μJ and duration (FWHM) of ∼280 ns for modulation frequencies of 1-20 kHz when using acousto-optic modulation. The main effects that limit the Q-switched pulse peak power are the onset of gain-switched pulsing during the low-Q state and strong pump excited state absorption.

AB - A small scale coupled Yb-silica and Tm-silica fibre laser system is described with output at 1.9 μm and with Q-switching using an acousto-optic modulator and also by mechanical optical modulation. The Yb-fibre laser pump source exhibited strong self-pulsation with high-intensity pulses due to stimulated Brillouin scattering. But regular Q-switched pulses were generated from the Tm-fibre laser with an energy of ∼2.4μJ and duration (FWHM) of ∼280 ns for modulation frequencies of 1-20 kHz when using acousto-optic modulation. The main effects that limit the Q-switched pulse peak power are the onset of gain-switched pulsing during the low-Q state and strong pump excited state absorption.

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Nanosecond Q-switched operation of coupled Yb and Tm fibre lasers

Abstract

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