Broadband 2D <i>n </i>× <i>n</i> Vortex Arrays Generated from an Efficient Petal‐Like Raman Laser with an Astigmatic Mode Convertor

Miao, Yujie; Zhang, Lin; Chen, Dimeng; Dong, Jun

doi:10.1002/adpr.202200293

Cited by 4 publications

(4 citation statements)

References 52 publications

(57 reference statements)

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“…[20,33] A 1-mm-thick Yb:YAG crystal doped with 10 at.% Yb 3+ ions was used as active medium for generating broadband Raman laser taking advantage of the broad emission band of Yb:YAG crystal. [25,34] M1 and M2 are coatings as the cavity mirrors and L R indicates the thickness of YVO 4 crystals. Film with high reflectivity at 1030-1100 nm and anti-reflection at 940 nm was coated on Yb:YAG crystal to act as front cavity mirror, M1.…”

Section: Methodsmentioning

confidence: 99%

“…The achieved optical conversion efficiency for vector vortex lasers with RP-ARP and AP-AAP is comparable to the high-order petallike Yb:YAG/YVO 4 Raman microchip laser by shifting focal spot away from Yb:YAG crystal surface. [25,26] Therefore, efficient performance of HP vector vortex Raman laser has been achieved. Although there is a severe thermal effect in the Yb:YAG/YVO 4 Raman microchip laser at high pump power, the performance of HP vector vortex Raman microchip laser can be further enhanced by optimizing pump beam spot to increase pump power intensity and maintaining good mode matching between pump beam and LG 0,1 vortex laser beam.…”

Section: Output Power Of Hp Vector Vortex Raman Lasersmentioning

confidence: 99%

“…[23,24] Recently, n×n vortex arrays have been converted from petal-like Raman lasers constructed with Yb:YAG and c-cut YVO 4 crystals. [25,26] It has been demonstrated that the SoP of cylindrical vector vortex beams can be controlled with thermal effect induced local birefringence in annular beam pumped microchip lasers. [27][28][29] Therefore, annular beam pumped Yb:YAG/YVO 4 Raman microchip laser is a platform for generating hybridly polarized vector vortex lasers oscillating at Stokes wavelengths.…”

Section: Introductionmentioning

confidence: 99%

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Broadband Hybridly Polarized Vector Vortex Raman Microchip Laser

Miao,

Shi,

Zhu

et al. 2023

Annalen der Physik

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Hybridly polarized (HP) vector vortex Raman lasers dramatically extend their applications on optical microscopy, optical communication, and quantum information. Spatial light modulators and waveplates are widely used for generating HP vector vortex lasers, however, the performance and beam quality of HP vector vortex lasers are restricted by diffraction loss and low damage threshold of these optical elements. Here, HP vector vortex Raman microchip lasers constructed with Yb3+:Y3Al5O12 (Yb:YAG) and vanadate (YVO4) crystals is demonstrated. The states of polarization (SoP) of HP vector vortex lasers are combination of radial and anti‐radial polarizations (RP‐ARP), azimuthal and anti‐azimuthal polarizations (AP‐AAP). The SoP of HP vector vortex lasers can be controlled by adjusting the length of YVO4 crystal and applying pump power. Maximum output powers are 456 and 586 mW with optical efficiency of 7.1% and 9.2% for HP vector vortex lasers with SoP of RP‐ARP and AP‐AAP. The HP vector vortex Raman lasers with SoP of RP‐ARP and AP‐AAP oscillate ≈1076 nm with bandwidths of 11.4 and 10.8 nm. High beam quality is achieved for HP vector vortex lasers with measured M2 nearly equal to theoretical value. The broadband HP vector vortex Raman lasers with high beam quality extend applications on optical trapping, and quantum information processing.

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Section: Methodsmentioning

confidence: 99%

Section: Output Power Of Hp Vector Vortex Raman Lasersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Broadband Hybridly Polarized Vector Vortex Raman Microchip Laser

Miao,

Shi,

Zhu

et al. 2023

Annalen der Physik

Self Cite

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“…Nonlinear frequency conversion methods [19,20], such as stimulated Raman scattering, are a useful tool for achieving an easy frequency conversion, orbital angular momentum transfer and even topological charge doubling. In 2013, Andrew et al [21] from Macquarie University used a 20 mm long Nd:GdVO 4 as a Raman and lasing medium, which as a first-Stokes emission produced an output power of 380 mW and a fundamental beam of 400 mW under the incident pump power of 6.8 W. The LG 01 mode was preserved for the fundamental and the Stokes fields, respectively, which showed that the orbital angular momentum in the fundamental fields was transferred to the Stokes field.…”

Section: Introductionmentioning

confidence: 99%

An Axicon-Based Annular Pump Acousto-Optic Q-Switched Nd:GdVO4 Self-Raman Vortex Laser

Liu,

Duan,

Mao

et al. 2023

Crystals

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We report, for the first time, the generation of a 1173 nm acousto-optic Q-switched self-Raman vortex laser with an axicon-based annular pump system. A 20 mm long Nd:GdVO4 crystal was used as the self-Raman crystal. Both the fundamental field and the first-Stokes field were investigated using the respective output couplers. In comparison with both vortex fields, a noticeable beam cleaning-up effect and pulse compression were observed from the 1063 nm fundamental field to the 1173 nm first-Stokes field. A Stokes field carrying a unitary topological charge was achieved. Finally, the average output power of the first-Stokes vortex emission reached 454 mW under an incident pump power of 19.5 W, corresponding to a pulse width of 45.7 ns. It was beneficial to apply a high peak power from the Q-switched laser and self-Raman conversion to expand the applications of the vortex laser beam.

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