Vortex laser by transforming Gaussian mode with an interferometric output coupler

Kerridge-Johns, William R.; Geberbauer, J. W. T.; Damzen, M. J.

doi:10.1364/oe.27.011642

Cited by 20 publications

(20 citation statements)

References 20 publications

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“…This allows for both high power extraction (by having the flat‐top beam at the gain medium end of the cavity) and delivery in a low divergence mode (by having the Gaussian beam at the output coupler end): high‐brightness lasers by intracavity structured light. Another approach to this mode morphing was used to circulate a Gaussian beam inside the cavity while using an interferometric output coupler to generate a vortex beam at the output . This allowed for both OAM control and power handling simultaneously.…”

Section: Structured Light Lasersmentioning

confidence: 99%

Structured Light from Lasers

Forbes

2019

Laser & Photonics Reviews

216

126

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Structured light is derived from the ability to tailor light, usually referring to the spatial control of its amplitude, phase, and polarization. Although a venerable topic that dates back to the very first laser designs, structuring light at the source has seen an explosion in activity over the past decade, fuelled by a modern toolkit that exploits the versatility of diffractive structures, liquid crystals, metasurfaces/metamaterials, and exotic laser geometries, as well as a myriad of applications that range from imaging, microscopy, and laser material processing to optical communication. Here, the recent progress in creating and controlling structured light is reviewed, with particular emphasis on structuring light at the source: structured light lasers. The various design approaches, including pump shaping, cavity geometries, and the use of custom intracavity optical elements, implemented in a variety of lasers from microchip solutions to high‐power fibers are covered in a tutorial style. The history and latest developments in the field are reviewed, elucidating the various structured light patterns that have been created from lasers, including orbital angular momentum and vector states of light. Finally, the present challenges and limitations are highlighted, along with comments on likely future trends.

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Section: Structured Light Lasersmentioning

confidence: 99%

Structured Light from Lasers

Forbes

2019

Laser & Photonics Reviews

216

126

View full text Add to dashboard Cite

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“…The magnitudes of normalised displacement d/w 0 (and correspondingly angle (πw 0 θ)/λ) should be small for ideal LG 01 output; in practice it has been shown that ratio values up to 0.5 will accurately reproduce the LG 01 mode. 26 The transmission T of the VOC is given by, 26…”

Section: Experimental Standard Laser and Vortex Laser Systemsmentioning

confidence: 99%

“…25 The first practical implementation of an interferometric VOC laser was demonstrated in our previous work. 26 Figure 1. The concept of the VOC with a fundamental Gaussian input, which is partially transmitted as a vortex mode, with the remainder reflected unchanged.…”

Section: Introductionmentioning

confidence: 99%

Q-switched vortex laser using a Sagnac interferometer as an output coupler

Geberbauer

Kerridge-Johns

Damzen

2020

Solid State Lasers XXIX: Technology and Devices

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Vortex lasers are an attractive prospect for efficient generation of high-quality beams in compact, environmentally robust, and turnkey systems. We demonstrate conversion of a Q-switched, diode-pumped Nd:YVO 4 , TEM 00 Gaussian laser into a vortex laser source by replacing the output coupling mirror by a vortex output coupler (VOC) based on an imbalanced Sagnac interferometer. The Q-switched VOC laser generated a vortex output with 5.1 W average power, slope efficiency of 46% at 150 kHz pulse repetition rate, only marginally lower than the 5.4 W and 49% slope efficiency of the plane mirror laser. Vortex handedness was switchable with a single VOC control without loss of vortex power. In both handedness cases the vortex mode quality was assessed to be excellent by detailed analysis of vortex phase profile and propagation characteristics and comparison to an ideal vortex. The power scaling potential of the VOC was demonstrated in a higher power cavity, achieving a vortex output power of 14.3 W and a slope efficiency of 55%. Further investigation verified the ability for the VOC laser to self-mode-filter the intracavity mode, showing maintenance of high TEM 00 quality even after introducing deliberate mode to pump size mismatch, when the equivalent plane mirror laser becomes multimode. This work highlights the potential of the VOC as a simple route to high powered structured light sources using just standard high-power handling mirror components and its self-mode-filtering property to compensate intra-cavity spatial mode degradation when power-scaling.

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“…They experimentally demonstrate the decomposition of single as well as composite LG beams and compare it with simulations [8]. W.R. Kerridge-Johns et al demonstrated high quality vortex output beams in a diode-pumped Nd:YVO 4 laser using an imbalanced Sagnac interferometer as output coupler [9]. K. S. Abedin et al demonstrated operation of a cladding-pumped hybrid ytterbium-doped HOM fiber amplifier and reconversion of the HOM output to Gaussian-like beam by using an axicon based reconversion system.…”

mentioning

confidence: 94%

Advanced Solid-State Lasers 2019: focus issue introduction

Sennaroğlu¹,

Goodno²,

Mirov³

et al. 2020

Opt. Mater. Express

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This joint issue of Optics Express and Optical Materials Express features 28 state-ofthe-art articles written by authors who participated in the international "Advanced Solid State Lasers" conference, held in Boston November 4-8, 2018. This review provides a summary of these articles that cover the spectrum of solid state lasers from materials research to sources and from design innovation to applications.

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Vortex laser by transforming Gaussian mode with an interferometric output coupler

Cited by 20 publications

References 20 publications

Structured Light from Lasers

Structured Light from Lasers

Q-switched vortex laser using a Sagnac interferometer as an output coupler

Advanced Solid-State Lasers 2019: focus issue introduction

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