A single-frequency intracavity Raman laser

Bai²,

et al. 2021

Front. Phys.

Diamond has a broad spectral transmission range (>0.2 μm) and the largest Raman frequency shift (1,332 cm−1) among known Raman crystals. Hence, the diamond Raman laser has the potential to achieve lasing in the long-wave infrared (LWIR) range, which is difficult to reach via other crystalline lasers. Here, we report a new approach to achieve LWIR output using diamond Raman conversion and provide the corresponding analysis model and simulation results. The conversion efficiency is analyzed as function of the pump waist size, output-coupler transmission, and crystal length, at constant pump power. The maximum output power at which a diamond of relatively large size can be operated without damage is predicted. This study paves a way for high-power LWIR lasing in diamond.

Section: Discussionmentioning

confidence: 96%

Numerical Simulation of Long-Wave Infrared Generation Using an External Cavity Diamond Raman Laser

Bai²,

et al. 2021

Front. Phys.

“…During the past decade, triple-molybdates with similar structures, such as KBaGd(MoO 4 ) 3 , have also been proved to be potential candidates for laser host crystals with different output wavelengths ranging from the visible to midinfrared region with different rare-earth ions doped. [22][23][24][25][26][27] Besides, crystals in this family were also observed to have large third-order nonlinear susceptibility for stimulated Raman scattering (SRS) and have been demonstrated as efficient Raman shifters, examples can be seen in molybdates, like SrMoO 4 , 28 CaMoO 4 , 28 and PbMoO 4 , 28,29 and tungstates, like BaWO 4 , [30][31][32][33] SrWO 4 , 34 and KGd(WO 4 ) 2 . [35][36][37][38][39][40][41] Combining both the outstanding performances as laser host and Raman laser materials, rare-earth doped scheelite crystals can be used for generating self-stimulated Raman lasers.…”

Section: Introductionmentioning

confidence: 99%

Top-seeded solution growth, spectral analysis and laser properties of a novel Nd-doped Bi₂Mo_2.66W_0.34O₁₂ crystal

Tian¹,

Chen²,

Sun³

et al. 2023

CrystEngComm

“…Diamond Raman lasers have enabled the creation of coherent radiation in exotic wavelength regimes, e.g. the yellow band [7][8][9][10][11][12], where no common laser diodes are available. High-power diamond Raman lasers have been implemented across a large range of wavelengths, from the ultraviolet [13] across the visible [9,12,14] and infrared [15][16][17][18][19][20][21][22][23], all the way to the mid-infrared [18].…”

Section: Introductionmentioning

confidence: 99%

“…the yellow band [7][8][9][10][11][12], where no common laser diodes are available. High-power diamond Raman lasers have been implemented across a large range of wavelengths, from the ultraviolet [13] across the visible [9,12,14] and infrared [15][16][17][18][19][20][21][22][23], all the way to the mid-infrared [18]. However, current implementations are limited by their high threshold pump power requirements, typically several Watts.…”

Section: Introductionmentioning

confidence: 99%

Widely-tunable, doubly-resonant Raman scattering on diamond in an open microcavity

Flågan,

Maletinsky,

Warburton

et al. 2021

Preprint

Raman lasers based on bulk diamond are a valuable resource for generating coherent light in wavelength regimes where no common laser diodes are available. Nevertheless, the widespread use of such lasers is limited by their high threshold power requirements on the order of several Watts. Using on-chip microresonators, a significant reduction of the lasing threshold by more than two orders of magnitude has been shown. However, these resonators lack a continuous tuning mechanism and, mainly due to fabrication limitations, their implementation in the visible remains elusive. Here, we propose a platform for a diamond Raman laser in the visible. The device is based on a miniaturized, open-access Fabry-Perot cavity. Our microcavity provides widely-tunable doubly-resonant enhancement of Raman scattering from high quality single-crystalline diamond. We demonstrate a >THz continuous tuning range of doubly-resonant Raman scattering, a range limited only by the reflective stopband of the mirrors. Based on the experimentally determined quality factors exceeding 300 000, our theoretical analysis suggests that, with realistic improvements, a sub-mW threshold is readily within reach. Our findings pave the way to the creation of a universal low-power frequency shifter, a potentially valuable addition to the nonlinear optics toolbox.