100 kW peak power external cavity diamond Raman laser at 252 μm

Demetriou, Giorgos; Kemp, Alan J.; Savitski, Vasili

doi:10.1364/oe.27.010296

Cited by 23 publications

(12 citation statements)

References 28 publications

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“…Pumping Raman cavities at very high peak power densities enables frequency conversion and produces new laser lines and useful high-brightness sources. This extends the spectral spans of existing lasers and fills the spectral gaps in this spectral range [4][5][6][7]. Raman lasers have a few more advantages, such as linewidth narrowing, pulse length shortening, and spatial beam quality improvement through Raman beam cleanup [8].…”

Section: Introductionmentioning

confidence: 92%

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An Electro-Optic, Actively Q-Switched Tm:YAP/KGW External-Cavity Raman Laser at 2273 nm and 2344 nm

et al. 2021

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This paper presents a KGW Raman laser with an external-cavity configuration in the 2 μm region. The Raman laser is pumped by unique, electro-optic, actively Q-switched Tm:Yap laser, emitting at 1935 nm. The electro-optic modulation is based on a KLTN crystal, enabling the use of a short crystal length, with a relatively low driving voltage. Due to the KGW bi-axial properties, the Raman laser is able to lase separately at two different output wavelengths, 2273 and 2344 nm. The output energies and pulse durations for these two lines are 0.42 mJ/pulse at 18.2 ns, and 0.416 mJ/pulse at 14.7 ns, respectively. This is the first implementation of a KGW crystal pumped by an electro-optic active Q-switched Tm:Yap laser in the SWIR spectral range.

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Section: Introductionmentioning

confidence: 92%

“…A more recent publication has introduced a Raman laser based on a diamond crystal, which has the highest Raman gain coefficient, pumped by a Tm:YLF at 1.89 µm emitting at 2.52 µm. They achieved up to 1.67 mJ of output energy per pulse [7], but with a very low repetition rate.…”

Section: Introductionmentioning

confidence: 99%

An Electro-Optic, Actively Q-Switched Tm:YAP/KGW External-Cavity Raman Laser at 2273 nm and 2344 nm

et al. 2021

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“…In 2020, Demetriou et al successfully realized an output of wavelength ∼2.52 µm at the edge of multiphoton absorption in diamond by first-order Raman conversion in an external cavity DRL pumped by a 1.89 µm Tm:LiYF 4 (YLF) laser [92] . Two different Brewster-cut diamond crystals were used in the experiment, and the experimental equipment and output spectrogram are shown in Figure 9(d).…”

Section: Raman Frequency Shiftmentioning

confidence: 99%

“…Up to now, the wavelength conversion to deep ultraviolet, visible, near-infrared, and mid-infrared wavelength regions has been successfully realized through the effective combination of diamond with excellent characteristics and SRS [7,[90][91][92][93] . However, with the increase of pump power and cascade times, not only the mirror coating process will limit the development of cascaded Raman lasers, but also the increasing thermal effects in the diamond crystal may become an important factor.…”

Section: Raman Frequency Shiftmentioning

confidence: 99%

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Diamond Raman laser: a promising high-beam-quality and low-thermal-effect laser

Ding

Bai

et al. 2021

High Pow Laser Sci Eng

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Stimulated Raman-scattering-based lasers provide an effective way to achieve wavelength conversion. However, thermally induced beam degradation is a notorious obstacle to power scaling and it also limits the applicable range where high output beam quality is needed. Considerable research efforts have been devoted to developing Raman materials, with diamond being a promising candidate to acquire wavelength-versatile, high-power, and high-quality output beam owing to its excellent thermal properties, high Raman gain coefficient, and wide transmission range. The diamond Raman resonator is usually designed as an external-cavity pumped structure, which can easily eliminate the negative thermal effects of intracavity laser crystals. Diamond Raman converters also provide an approach to improve the beam quality owing to the Raman cleanup effect. This review outlines the research status of diamond Raman lasers, including beam quality optimization, Raman conversion, thermal effects, and prospects for future development directions.

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In‐Source High‐Resolution Spectroscopy Using an Integrated Tunable Raman Laser

Granados,

Stoikos,

Bernerd

et al. 2023

Laser & Photonics Reviews

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Tunable single‐frequency lasers are the most prominent tool for high‐resolution spectroscopy, allowing for the study and exploitation of the electronic structure of atoms. A significant milestone relies on the demonstration of integrated laser technology for performing such a task. The device presented here is composed of a compact Fabry–Perot monolithic resonator capable of producing tunable and Fourier‐limited nanosecond pulses with a MHz‐class frequency stability without active cavity stabilization elements. It also has the remarkable capability of exploiting the Raman effect to funnel efficiently the broad spectrum of an input laser to a spectrally‐bright Stokes pulse at hard‐to‐access wavelength ranges. The targeted atom for the demonstrations is 152Sm, released as an atomic vapor in a hot cavity environment. Here, the Stokes field is tuned to a wavelength of 433.9 nm, while a crossed‐beams spectroscopy setup is used to minimize the Doppler broadened spectral features of the atoms. With this work, the suitability of integrated diamond Raman lasers as a high‐resolution in‐source spectroscopy tool is demonstrated, enabling many applications in atomic and nuclear physics. The integrated form‐factor and inherent simplicity makes such a laser an interesting prospect for quantum‐technology based sensing systems and related applications.

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100 kW peak power external cavity diamond Raman laser at 252 μm

Cited by 23 publications

References 28 publications

An Electro-Optic, Actively Q-Switched Tm:YAP/KGW External-Cavity Raman Laser at 2273 nm and 2344 nm

An Electro-Optic, Actively Q-Switched Tm:YAP/KGW External-Cavity Raman Laser at 2273 nm and 2344 nm

Diamond Raman laser: a promising high-beam-quality and low-thermal-effect laser

In‐Source High‐Resolution Spectroscopy Using an Integrated Tunable Raman Laser

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