Abstract
Optical properties and high-order stimulated Raman scattering (SRS) generation in a homemade CVD diamond crystal with 3 × 3 mm2 aperture are investigated in this paper. The high order of the Raman laser has been studied theoretically and demonstrated experimentally. By simulating the Stokes components at different pump intensities and the divergence angles, the pump source was well matched with the size of the crystal. Pumped by using a 1064 nm picosecond laser, five coaxial wavelengths were obtained for the first time based on the CVD diamond at 932 nm, 1064 nm, 1240 nm, 1485 nm, and 1851 nm. This work provides a reference for further development of the optical grade diamond crystal with a large aperture.
Highlights
As a common approach to achieve multiple-wavelength output, stimulated Raman scattering (SRS) has played an important role in the fields of information storage, multiwavelength communication, and multispectral sensing
In addition to the aforementioned traditional Raman crystals, Raman lasers based on diamond have attracted extensive attention in recent years, especially with the rapid development of chemical vapor deposition (CVD) technology. e CVD diamond has inherent qualities such as its high hardness, good thermal conductivity, and wide transparent range and has higher purity and lower defects compared with the natural diamond [7]
A dot in the crystal was found during the detection process. us, the damage threshold for the CVD diamond is close to 18.6 GW/cm2, which means that this sample is qualified for operating at high power
Summary
As a common approach to achieve multiple-wavelength output, stimulated Raman scattering (SRS) has played an important role in the fields of information storage, multiwavelength communication, and multispectral sensing. Crystals such as vanadates (YVO4 and GdVO4), tungstates (BaWO4), nitrates (Ba(NO3)2), and iodates (LiIO3) have been utilized in SRS generation for exploring a wider spectral range [1,2,3,4]. E coaxial output of five wavelengths in diamond pumped by a 1064 nm picosecond laser is investigated theoretically and experimentally, among which the order of Stokes is the same as the highest order reported worldwide. E result paves the way for improving the quality of the homemade CVD diamond and utilizing it for Raman laser generation
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