Stable high-efficiency continuous-wave diamond Raman laser at 1178 nm

Sun, Yuxiang; Li, Muye; Kitzler, Ondřej; Mildren, Richard P.; Bai, Zhenxu; Zhang, Hongchao; Lu, Jian; Feng, Yan; Yang, Xuezong

doi:10.1088/1612-202x/ac9ce2

Cited by 11 publications

(6 citation statements)

References 44 publications

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“…Although the pump power RMS was 0.2% in Ref. [27], 2.75 times smaller than that in this case, the Stokes power RMS was 2.4% in Ref. [27], compared to 1.8% in this case.…”

Section: Resultscontrasting

confidence: 58%

“…[27], 2.75 times smaller than that in this case, the Stokes power RMS was 2.4% in Ref. [27], compared to 1.8% in this case. The better Stokes power stability here was mainly attributed to the elimination of the Stokes longitudinal-mode beating and the SBS-induced power fluctuations.…”

Section: Resultsmentioning

confidence: 58%

“…As investigated in Ref. [27], a V-shaped oscillator architecture with higher transmissivity at the pump wavelength can provide Stokes output with excellent performance in terms of power stability and conversion efficiency compared to a two-mirror linear oscillator architecture, due to the negligible pump resonance and the insensitive cavity misalignment. Here, M1 was highly transmitting at the pump wavelength and the effective reflectivity was only 0.76% for a cavity round-trip, resulting in a weak intracavity pump and Stokes intensity modulation.…”

Section: Resultsmentioning

confidence: 99%

“…M1 was rotated about 12 • from the pump optical path to separate the pump and Raman beams, which was similar to Ref. [27]. The Raman medium was a 7 mm × 2 mm × 2 mm chemical vapor deposition (CVD)-grown single-crystal diamond (Type IIa, Element Six) with anti-reflective coatings both at 1064 and 1240 nm and cut for propagation along the <110> direction.…”

Section: Methodsmentioning

confidence: 99%

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High-power free-running single-longitudinal-mode diamond Raman laser enabled by suppressing parasitic stimulated Brillouin scattering

Liu

Zhu

Sun

et al. 2023

High Pow Laser Sci Eng

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A continuous-wave (CW) single-longitudinal-mode (SLM) Raman laser at 1240 nm with power of up to 20.6 W was demonstrated in a free-running diamond Raman oscillator without any axial-mode selection elements. The SLM operation was achieved due to the spatial-hole-burning free nature of Raman gain and was maintained at the highest available pump power by suppressing the parasitic stimulated Brillouin scattering (SBS). A folded-cavity design was employed for reducing the perturbing effect of resonances at the pump frequency. At a pump power of 69 W, the maximum Stokes output reached 20.6 W, corresponding to a 30% optical-to-optical conversion efficiency from 1064 to 1240 nm. The result shows that parasitic SBS is the main physical process disturbing the SLM operation of Raman oscillator at higher power. In addition, for the first time, the spectral linewidth of a CW SLM diamond Raman laser was resolved using the long-delayed self-heterodyne interferometric method, which is 105 kHz at 20 W.

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“…Although the pump power RMS was 0.2% in Ref. [27], 2.75 times smaller than that in this case, the Stokes power RMS was 2.4% in Ref. [27], compared to 1.8% in this case.…”

Section: Resultscontrasting

confidence: 58%

Section: Resultsmentioning

confidence: 58%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

See 2 more Smart Citations

High-power free-running single-longitudinal-mode diamond Raman laser enabled by suppressing parasitic stimulated Brillouin scattering

Liu

Zhu

Sun

et al. 2023

High Pow Laser Sci Eng

Self Cite

View full text Add to dashboard Cite

show abstract

“…The crystalline Raman lasers based on stimulated Raman scattering (SRS) in nonlinear crystals have long been established as an effective technique for wavelength-versatile output from ultra-violet to mid-infrared [1][2][3][4]. Due to the relatively low χ (3) nonlinear gain, the Raman lasers usually suffer a high SRS threshold of 20 W level when operating in the continuous-wave (CW) regime [5,6]. An alternative approach for efficient CW Raman output is the intracavity pumping scheme, in which the Raman crystals are located inside the cavity of the fundamental laser so that the high circulating power in the fundamental cavity would produce a sufficient gain for CW SRS with watt-level primary laser diode (LD) pump power [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Efficient Nd:YVO4-KGW intracavity Raman lasers with linear and folded fundamental laser cavities

Geng,

Sheng,

Yang

et al. 2024

Solid State Lasers XXXIII: Technology and Devices

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The efficient Nd:YVO4/KGW continuous-wave (CW) intracavity Raman lasers in linear and folded cavities were demonstrated. The coupled cavity scheme was utilized to control the beam sizes in the laser crystal and Raman crystal, to alleviate the thermal issues and enhance the Raman gain. With the 1064 nm fundamental laser polarized along Nm axis of the Np-cut KGW crystal, 6.63 W of linear cavity and 9.33 W of folded cavity Stokes output at 1177.3 nm were obtained under an incident laser diode pump power of 36.65 W, with an optical efficiency of 18.1% and 25.5%, respectively. Our results show that the compact intracavity Raman laser is capable of generating multi-watt CW output efficiently by proper cavity arrangement. 10-watt level Raman output can be realized in the V-shaped cavity through parameter design. In contrast, the folded cavity scheme is more favorable for higher Stokes output power as well as efficiency compared with the linear cavity scheme because of its better mode matching.

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High power tunable Raman fiber laser at 1.2 μm waveband

Zhang,

Xu,

Liang

et al. 2024

Front. Optoelectron.

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Development of a high power fiber laser at special waveband, which is difficult to achieve by conventional rare-earth-doped fibers, is a significant challenge. One of the most common methods for achieving lasing at special wavelength is Raman conversion. Phosphorus-doped fiber (PDF), due to the phosphorus-related large frequency shift Raman peak at 40 THz, is a great choice for large frequency shift Raman conversion. Here, by adopting 150 m large mode area triple-clad PDF as Raman gain medium, and a novel wavelength-selective feedback mechanism to suppress the silica-related Raman emission, we build a high power cladding-pumped Raman fiber laser at 1.2 μm waveband. A Raman signal with power up to 735.8 W at 1252.7 nm is obtained. To the best of our knowledge, this is the highest output power ever reported for fiber lasers at 1.2 μm waveband. Moreover, by tuning the wavelength of the pump source, a tunable Raman output of more than 450 W over a wavelength range of 1240.6–1252.7 nm is demonstrated. This work proves PDF’s advantage in high power large frequency shift Raman conversion with a cladding pump scheme, thus providing a good solution for a high power laser source at special waveband. Graphical Abstract

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Stable high-efficiency continuous-wave diamond Raman laser at 1178 nm

Cited by 11 publications

References 44 publications

High-power free-running single-longitudinal-mode diamond Raman laser enabled by suppressing parasitic stimulated Brillouin scattering

High-power free-running single-longitudinal-mode diamond Raman laser enabled by suppressing parasitic stimulated Brillouin scattering

Efficient Nd:YVO4-KGW intracavity Raman lasers with linear and folded fundamental laser cavities

High power tunable Raman fiber laser at 1.2 μm waveband

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