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YCOB (YCa4O (BO3) 3, Yttrium(III) oxide calcium) - nonlinear crystal is considered to have a good prospect of optical frequency multiplier in the ultraviolet band.
YCOB crystal is one of the most widely used nonlinear optical crystals. Its nonlinear optical coefficient is equal to the nonlinear light of BBO crystal and LBO crystal Learning coefficient. The effective frequency doubling coefficients of the second and third orders reach 2, 8, and 1, 4 times that of KDP, respectively. YCOB crystal has a large aperture and strong damage in the femtosecond region
The advantages of high degree, wide allowable angle range, and allowable values around 2000-2500GW/cm2. Small temperature range, small dispersion angle, and short growth cycle using CZ method,
At the same time, it has stable physical and chemical properties (non deliquescence) and good processing performance. Therefore, it is believed that blue-green light and ultraviolet band optical frequency doubling crystals have good performance
Application prospects.One of the latest technological achievements related to YCOB is the intracavity SHG of a Nd: YVO4 laser (P=5.6W) pumped at the end of a diode array1.2cm long crystal（ θ= 64.5 °, φ= Generate continuous green light of 2.35-W at 35.5 ° C（ λ= 532nm) output. Another similar application is Nd: YVO4 THG of laser radiation. Utilizing KTP crystal frequency doubling and 1.1 centimeter long crystals（ θ= 106 °, φ= 77.2 °) near infrared optical parametric chirp at 355nm
A quasi continuous light of 124mW (pulse repetition frequency of 20kHz) was obtained in the pulse amplifier, and the current CLE with high average and ultra-high peak powerThe optical frequency of pulse quasi continuous optical amplifiers is very low.
YCOB (YCa4O (BO3) 3, Yttrium(III) oxide calcium) - nonlinear crystal is considered to have a good prospect of optical frequency multiplier in the ultraviolet band.
YCOB crystal is one of the most widely used nonlinear optical crystals. Its nonlinear optical coefficient is equal to the nonlinear light of BBO crystal and LBO crystal Learning coefficient. The effective frequency doubling coefficients of the second and third orders reach 2, 8, and 1, 4 times that of KDP, respectively. YCOB crystal has a large aperture and strong damage in the femtosecond region
The advantages of high degree, wide allowable angle range, and allowable values around 2000-2500GW/cm2. Small temperature range, small dispersion angle, and short growth cycle using CZ method,
At the same time, it has stable physical and chemical properties (non deliquescence) and good processing performance. Therefore, it is believed that blue-green light and ultraviolet band optical frequency doubling crystals have good performance
Application prospects.One of the latest technological achievements related to YCOB is the intracavity SHG of a Nd: YVO4 laser (P=5.6W) pumped at the end of a diode array1.2cm long crystal（ θ= 64.5 °, φ= Generate continuous green light of 2.35-W at 35.5 ° C（ λ= 532nm) output. Another similar application is Nd: YVO4 THG of laser radiation. Utilizing KTP crystal frequency doubling and 1.1 centimeter long crystals（ θ= 106 °, φ= 77.2 °) near infrared optical parametric chirp at 355nm
A quasi continuous light of 124mW (pulse repetition frequency of 20kHz) was obtained in the pulse amplifier, and the current CLE with high average and ultra-high peak powerThe optical frequency of pulse quasi continuous optical amplifiers is very low.
