排序方式: 共有114条查询结果,搜索用时 15 毫秒
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连续单频光纤激光器在光纤通信、光纤传感、引力波探测、激光雷达、非线性频率转换、光谱学等领域有着广泛的应用前景,发展十分迅速.近20年来,1.5μm波段连续单频光纤激光性能不断提高,如激光线宽从兆赫兹到千赫兹、功率从毫瓦到近百瓦量级,但激光器的噪声抑制、放大线宽展宽、输出功率等仍有待进一步研究.本文回顾了获得1.5μm波段连续单频激光输出的关键技术,总结了本课题组基于磷酸盐玻璃光纤短腔Bragg反射(DBR)结构实现1.5μm波段连续单频光纤激光性能,以及单频激光功率放大的研究进展. 相似文献
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Fluorescence Lifetime Increasing with F- Ions into Ytterbium-Doped Germanium-Lead-Tellurite Glasses 下载免费PDF全文
The effects of F^- ions in a germanium-lead-tellurite glass system on the spectral and potential laser properties of the Yb^3 are investigated. The absorption spectra, lifetimes, the emission cross-sections and the minimum pump intensities of the glass system with and without F^- ions have been measured and calculated. The results show that the fluorescence lifetime and the minimum pump intensity of Yb^3 ions increase evidently, which indicatesthat germanium-lead-oxyfluoride tellurite glass is a promising laser host matrix for high power generation. FT-IRspectra were used to analyse the effect of F^- ions on OH^- groups in this glass system. Analysis demonstrates that addition of fluoride removes the OH^- groups and results in improvement of fluorescence lifetime of Yb^3 . 相似文献
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This paper reports on the fabrication and characterization of a newly erbium-doped
single-mode tellurite glass-fibre applicable for 1.5-μum optical amplifiers. A
very broad erbium amplified spontaneous emission in the range 1450--1650nm from
erbium-doped single-mode tellurite glass-fibre is obtained upon excitation of a
980-nm laser diode. The effects of the length of glass-fibre and the pumping power
of laser diode on the amplified spontaneous emission are discussed. The result
indicates that the tellurite glass-fibre is a promising candidate for designing
fibre-optic amplifiers and lasers. 相似文献
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Porous SiO2 antireflective (AR) coatings are prepared from the colloidal silica solution modified with methyltriethoxysilane (MTES) based on the sol-gel route. The viscosity of modified silica suspensions changes but their stability keeps when MTES is introduced. The refractive indices of modified coatings vary little after bake treatment from 100 to 150℃. The modified silica coatings on Ti:sapphire crystal, owning good homogeneity, display prominent antireflective effect within the laser output waveband (750-850 nm) of Ti:sapphire lasers, with average transmission above 98.6%, and own laser induced damage thresholds (LIDTs) of more than 2.2 J/cm2 at 800 nm with the pulse duration of 300 ps. 相似文献
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Highly Er3+ /yb3+-codoped single-mode phosphate glass fibre is fabricated by the rod-in-tube technique. The performances of high-concentration Er3+ /yb3+-codoped phosphate glass fibre amplifiers are investigated and discussed. An efficient optical fibre amplifier with a gain of 12.6 dB based on a 3.0 cm long Era+ /ybe+-codoped phosphate glass fibre is demonstrated under a dual-pump configuration with two 976 nm fibre-pigtail laser diodes, which make it attractive for compact Er3+-doped fibre amplifiers. The obtedned noise figures of signal wavelength from 1525 to 1565nm are less than 6.0dB. Gain saturation behaviour at 1535nm is also investigated, and the obtained saturation output power is larger than 10 dBm. 相似文献
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本文研究了808nm激光二极管抽运下掺Tm3+和Tm3+/Ho3+共掺碲酸盐玻璃的能量转换过程和机理.利用Dexter模型计算了能量转换微观参数和临界半径,分析了两者的变化特性;利用Vila等修正的Inokuti-Hirayama模型拟合了Tm3+的荧光衰减曲线.结果表明:Tm3+/Ho3+共掺碲酸盐玻璃的能量转换过程中,不仅包含Inokuti-Hirayama作用方式,而且存在着局域性相互作用,并随着Tm3+和Ho3+的浓度增大,后者所占比例逐渐增大. 相似文献
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本文运用相图模型方法,通过电子计算机计算了Na_2O-B_2O_3-V_2O_5,K_2O-B_2O_3-P_2O_5,K_2O-B_2O_3-Al_2O_3和Na_2O-B_2O_3-MgO三元系统玻璃的NMR数据,比较了实验值和计算得出的硼四配位分数(N4),得到了满意的结果。 相似文献
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