All-Fiber Laser Beam Shaping Using a Long-Period Grating

We demonstrate a simple all-fiber device that can transform a Gaussian-shaped laser beam into a uniform intensity beam. The device is based on the interaction of a core mode and a cladding mode partially coupled out by a long-period grating. We have achieved good beam uniformity (

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Bibliographic Details
Published in:IEEE photonics technology letters 2008-07, Vol.20 (13), p.1130-1132
Main Authors: Xijia Gu, Mohammed, W., Li Qian, Smith, P.W.E.
Format: Article
Language:English
Subjects:
Beams (radiation)
Devices
Divergence
Fiber devices
Fiber lasers
Gaussian
Gaussian processes
Gratings
Laser beam cutting
laser beam shaping
Laser beams
Laser modes
Laser tuning
long-period gratings
Noise levels
Optical fiber devices
Optical surface waves
Surface emitting lasers
Tuning
Variability
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Description
Summary:We demonstrate a simple all-fiber device that can transform a Gaussian-shaped laser beam into a uniform intensity beam. The device is based on the interaction of a core mode and a cladding mode partially coupled out by a long-period grating. We have achieved good beam uniformity (
ISSN:1041-1135
1941-0174
DOI:10.1109/LPT.2008.924640