Laser-Diode-Pumped Phase-Locked Nd: YAG Laser Arrays

Michio Oka; Hisashi Masuda; Yushi Kaneda; Shigeo Kubota

doi:10.1109/3.135239

Laser-Diode-Pumped Phase-Locked Nd: YAG Laser Arrays

Michio Oka, Hisashi Masuda, Yushi Kaneda, Shigeo Kubota

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

58 Scopus citations

Abstract

Scaling of an efficient and compact diode-end-pumped Nd:YAG laser was demonstrated by two-dimensional phase-locked arrays. The arrays of stable resonators were formed by multiple thermal lenses induced by the simultaneous end-pumping of laser-diode-coupled fibers. Because of partial overlap of each transverse mode, the output was phase locked. Various configurations of pumping fibers were tested to study phase locking. It was found that minimization of the coherently coupled intensity between adjacent array elements gave good prediction for phase difference between modes. When the plane parallel cavity as long as 30 mm was pumped by 2 x 2 laser diode coupled fibers, phase-locked 1.8 W continuous wave 1.06 μm output was obtained with 55% slope efficiency. 1.2 W single longitudinal mode output with single lobe beam profile was obtained by using a spatial phase filter and the twisted mode method.

Original language	English (US)
Pages (from-to)	1142-1147
Number of pages	6
Journal	IEEE Journal of Quantum Electronics
Volume	28
Issue number	4
DOIs	https://doi.org/10.1109/3.135239
State	Published - Apr 1992
Externally published	Yes

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics
Condensed Matter Physics
Electrical and Electronic Engineering

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title = "Laser-Diode-Pumped Phase-Locked Nd: YAG Laser Arrays",

abstract = "Scaling of an efficient and compact diode-end-pumped Nd:YAG laser was demonstrated by two-dimensional phase-locked arrays. The arrays of stable resonators were formed by multiple thermal lenses induced by the simultaneous end-pumping of laser-diode-coupled fibers. Because of partial overlap of each transverse mode, the output was phase locked. Various configurations of pumping fibers were tested to study phase locking. It was found that minimization of the coherently coupled intensity between adjacent array elements gave good prediction for phase difference between modes. When the plane parallel cavity as long as 30 mm was pumped by 2 x 2 laser diode coupled fibers, phase-locked 1.8 W continuous wave 1.06 μm output was obtained with 55% slope efficiency. 1.2 W single longitudinal mode output with single lobe beam profile was obtained by using a spatial phase filter and the twisted mode method.",

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year = "1992",

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publisher = "Institute of Electrical and Electronics Engineers Inc.",

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TY - JOUR

T1 - Laser-Diode-Pumped Phase-Locked Nd

T2 - YAG Laser Arrays

AU - Oka, Michio

AU - Masuda, Hisashi

AU - Kaneda, Yushi

AU - Kubota, Shigeo

PY - 1992/4

Y1 - 1992/4

N2 - Scaling of an efficient and compact diode-end-pumped Nd:YAG laser was demonstrated by two-dimensional phase-locked arrays. The arrays of stable resonators were formed by multiple thermal lenses induced by the simultaneous end-pumping of laser-diode-coupled fibers. Because of partial overlap of each transverse mode, the output was phase locked. Various configurations of pumping fibers were tested to study phase locking. It was found that minimization of the coherently coupled intensity between adjacent array elements gave good prediction for phase difference between modes. When the plane parallel cavity as long as 30 mm was pumped by 2 x 2 laser diode coupled fibers, phase-locked 1.8 W continuous wave 1.06 μm output was obtained with 55% slope efficiency. 1.2 W single longitudinal mode output with single lobe beam profile was obtained by using a spatial phase filter and the twisted mode method.

AB - Scaling of an efficient and compact diode-end-pumped Nd:YAG laser was demonstrated by two-dimensional phase-locked arrays. The arrays of stable resonators were formed by multiple thermal lenses induced by the simultaneous end-pumping of laser-diode-coupled fibers. Because of partial overlap of each transverse mode, the output was phase locked. Various configurations of pumping fibers were tested to study phase locking. It was found that minimization of the coherently coupled intensity between adjacent array elements gave good prediction for phase difference between modes. When the plane parallel cavity as long as 30 mm was pumped by 2 x 2 laser diode coupled fibers, phase-locked 1.8 W continuous wave 1.06 μm output was obtained with 55% slope efficiency. 1.2 W single longitudinal mode output with single lobe beam profile was obtained by using a spatial phase filter and the twisted mode method.

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Laser-Diode-Pumped Phase-Locked Nd: YAG Laser Arrays

Abstract

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