A discretely tunable dual-wavelength multi-watt Yb:CALGO laser

Manjooran, Sujith; Loiko, Pavel; Major, Arkady

doi:10.1007/s00340-017-6873-x

Cited by 57 publications

(29 citation statements)

References 62 publications

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“…In our tuning studies with the BRF element, using different filter orders, we could easily access two-color, and three-color laser operation. Moreover, output powers exceeding 100 W was obtained in dual-wavelength operation, which is, to our knowledge, is one of the highest output powers obtained in this regime [59]. It is clear that, with properly designed birefringent tuning elements optimized for multicolor laser operation, cryogenic Yb:YLF gain media could also be used in generating high power multicolor lasing in both cw [59,60] and cw mode-locked [61][62][63] operation regimes.…”

Section: Investigation Of Wavelength Tuningmentioning

confidence: 75%

Efficient, diode-pumped, high-power (>300W) cryogenic Yb:YLF laser with broad-tunability (995-10205 nm): investigation of E//a-axis for lasing

et al. 2019

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We present, what is to our knowledge, the first detailed lasing investigation of cryogenic Yb:YLF gain media in the E//a-axis. Compared to the usually employed E//c-axis, the a-axis of Yb:YLF provides a much broader and smooth gain profile, but this comes at the expense of reduced gain product. We have shown that, despite the lower gain, which (i) increases susceptibility to cavity losses, (ii) raises lasing threshold, and (iii) inflates thermal load, efficient and high-power lasing could be achieved in the E//a axis as well. A record continuous-wave (cw) powers above 300 W, cw slope efficiencies of 73%, and a tuning range covering the 995-1020.5 nm region were demonstrated. In quasi-cw lasing experiments, via minimization of thermal effects, slope efficiencies can be scaled up to 85%. In gain-switched operation, sub-50-µs long pulses with a peak power exceeding 2.5 kW at multi-kHz repetition rate were attained. We measured a beam quality factor below 1.5 for laser average powers up to 100 W and below 3 for laser average powers up to 300 W. Power scaling limits due to thermal effects, laser dynamics in pulsed pumping, and multicolor lasing operation potential were also investigated. The detailed results presented in this manuscript will pave the way towards development of high-power and high-energy Yb:YLF oscillators and amplifiers with sub-500-fs pulse duration.

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Section: Investigation Of Wavelength Tuningmentioning

confidence: 75%

Efficient, diode-pumped, high-power (>300W) cryogenic Yb:YLF laser with broad-tunability (995-10205 nm): investigation of E//a-axis for lasing

et al. 2019

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“…On the other hand, generation of the CR laser radiation with independent CRE enabled us to separate the laser properties from the CR beam formation. As a future work, it is possible to make the spectral intensity of the oscillating wavelengths equal and tune the wavelength of the laser by using a birefringent filter plate (BRF) [31,[39][40][41][42][43][44][45] or dual-crystal arrangement [46]. BRFs exhibit wavelength-dependent transmission loss that can enable one to impose higher loss on spectral regions where there is high level of gain.…”

Section: Discussionmentioning

confidence: 99%

Conical refraction Nd:CALGO laser with dual-wavelength output

Akbari

Fedorova

et al. 2021

Solid State Lasers XXX: Technology and Devices

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“…A dual-wavelength oscillator can simultaneously emit two wavelengths laser output and is highly suitable for applications in THz generation [67], optical coherence tomography [68], etc. In 2018, Sujith et al invented a discretely tunable dual-wavelength Yb:CALGO laser using a single birefringent filter (BRF) plate [69]. BRF plates can introduce wavelength-dependent periodic loss into a standard laser cavity.…”

Section: Broad Wavelength and Dual-wavelength Tunable Yb:calgo Lasermentioning

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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A discretely tunable dual-wavelength multi-watt Yb:CALGO laser

Cited by 57 publications

References 62 publications

Efficient, diode-pumped, high-power (>300W) cryogenic Yb:YLF laser with broad-tunability (995-10205 nm): investigation of E//a-axis for lasing

Efficient, diode-pumped, high-power (>300W) cryogenic Yb:YLF laser with broad-tunability (995-10205 nm): investigation of E//a-axis for lasing

Conical refraction Nd:CALGO laser with dual-wavelength output

Advances of Yb:CALGO Laser Crystals

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