Broadly tunable optical vortex beam in a diode-pumped Yb:CALGO laser

Zhao, Lina; Yuan, Ye; Tong, Luyang; Cai, Fangxin; Zhang, Wenyu; Cai, Yangjian

doi:10.1016/j.optlastec.2021.107134

Cited by 10 publications

(3 citation statements)

References 40 publications

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“…With more precise adjustments on the oscillator, chirality-controllable vortex beams were also achieved. By slightly modifying the angle of the output coupler, the OAM beam with wavelength tunability could be generated directly from Yb:CALGO laser recently [84]. An alternative vortex beam generator was also demonstrated with a mirror curvature dynamically controlled Z-shaped resonator in Figure 3c [85].…”

Section: Mode-tunable Structured Light Lasers With Yb:calgomentioning

confidence: 99%

Advances of Yb:CALGO Laser Crystals

et al. 2021

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Yb:CaGdAlO4, or Yb:CALGO, a new laser crystal, has been attracting increasing attention recently in a myriad of laser technologies. This crystal features salient thermal, spectroscopic and mechanical properties, which enable highly efficient and safe generation of continuous-wave radiations and ultrafast pulses with ever short durations. More specifically, its remarkable thermal-optic property and its high conversion efficiency allow high-power operation. Its high nonlinear coefficient facilitates study of optimized mode locking lasers. Besides, its ultrabroad and flat-top emission band benefits the generation of complex structured light with outstanding tunability. In this paper, we review the recent advances in the study of Yb:CALGO, covering its physical properties as well as its growing applications in various fields and prospect for future development.

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Section: Mode-tunable Structured Light Lasers With Yb:calgomentioning

confidence: 99%

Advances of Yb:CALGO Laser Crystals

et al. 2021

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“…To date, the reflective volume Bragg grating (VBG) has been theoretically and experimentally proved to be an effective wavelength selector for optical vortices with well-conserved OAM [18] . Most recently, a birefringent filter (BF) was experimentally used in a Yb:CaGdAlO 4 (Yb:CALGO) vortex laser and exhibited similar wavelength tuning ability for vortex beams [19] . Unfortunately, all of the previous reports have been focused on the near-infrared (IR) spectral region, and the wavelength tuning range was less than 50 nm limited by the gain spectrum of laser materials or cavity design [18,19] .…”

Section: Introductionmentioning

confidence: 99%

“…Most recently, a birefringent filter (BF) was experimentally used in a Yb:CaGdAlO 4 (Yb:CALGO) vortex laser and exhibited similar wavelength tuning ability for vortex beams [19] . Unfortunately, all of the previous reports have been focused on the near-infrared (IR) spectral region, and the wavelength tuning range was less than 50 nm limited by the gain spectrum of laser materials or cavity design [18,19] . So, wide tunability of the vortex laser, in particular, in the mid-IR region is desired from the viewpoint of their potential applications.…”

Section: Introductionmentioning

confidence: 99%

Widely tunable 2 µm optical vortex from a Tm:YAP laser

et al. 2023

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In this paper, we report on a wide wavelength tuning optical vortex carrying orbital angular momentum (OAM) of ±ħ, from a thulium-doped yttrium aluminum perovskite (YAP) laser employing a birefringent filter. The OAM is experimentally found to be well maintained during the whole wavelength tuning process. The Laguerre-Gaussian (LG 0,1 ) mode with a tuning range of 58 nm from 1934.8 to 1993.0 nm and LG 0,−1 mode with a range of 76 nm from 1920.4 to 1996.6 nm, are, respectively, obtained. This is, to the best of our knowledge, the first experimental implementation of wavelength tuning for a scalar vortex laser in the 2 μm spectral range, as well as the broadest tuning range ever reported from the vortex laser cavity. Such a vortex laser with robust structure and straightforward wavelength tuning capability will be an ideal light source for potential applications in the field of optical communication with one additional degree of freedom.

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Arbitrary topological charge vortex beams from carbon dots random lasers

Wang,

Mi,

et al. 2024

Rare Met.

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Broadly tunable optical vortex beam in a diode-pumped Yb:CALGO laser

Cited by 10 publications

References 40 publications

Advances of Yb:CALGO Laser Crystals

Advances of Yb:CALGO Laser Crystals

Widely tunable 2 µm optical vortex from a Tm:YAP laser

Arbitrary topological charge vortex beams from carbon dots random lasers

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