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An optical irradiation method for high-speed fiber coupler fabrications without contamination is proposed. In optical fiber
taper fabrications we found an interesting effect that fiber elongation is self-arrested although laser irradiation is continued.
This is a typical effect in the optical irradiation method, but is not seen in the flame method or the thermal heating method.
The “self-controlled fiber taper shape effect” is theoretically explained by considering thermal energy flows, and optical
fiber couplers are fabricated using this effect. From our experiments, we show that optical fiber coupler fabrications at
high-speed without contamination are possible using the optical irradiation method. 相似文献
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单模光纤双圆锥体的传输特性 总被引:1,自引:0,他引:1
本文研究并制作了光纤双圆锥体滤波器,给出了耦合模总相位差与滤波性能之间的关系,讨论了推的对称性对滤波器峰值传输的影响,对不同结构的锥体谱特性进行数值计算以验证分析结果,最后给出了实验结果对照. 相似文献
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利用宽度渐变微带线进行了门控分幅相机增益不均匀性修正技术研究。建立了渐变微带线修正的物理模型,通过特性阻抗调配补偿幅度衰减,设计了特种渐变微带线参数。比较了特种曲线渐变微带线与传统直线渐变微带线的修正效果。在0~4 GHz带宽范围内,特种曲线渐变微带补偿后,电压幅度不一致性由15.0%降低至1.6%,增益不一致性由70%降低到8%。对于当前使用的分幅相机,微带线宽度由6.00 mm渐变到4.45 mm就能有效地降低门控分幅相机增益的不一致性。 相似文献
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现在高功率光纤激光器和光纤放大器采用的双包层掺杂光纤,相对于从半导体泵浦激光器发射出的多模泵浦光束的大发散角,其内包层的直径很小,因此把泵浦光有效地耦合到双包层掺杂光纤的内包层是一个急需解决的难题。研制一种熔锥型侧面泵浦耦合器,可以大幅度提高泵浦光功率,实现增益光纤的多点泵浦,在双包层光纤放大器中使用良好,安全稳定,实现了较高的耦合效率,达到了70%,信号光通过率98%,信号输入与泵浦输入的隔离度大于50 dB,泵浦输入对输出端反向传输光的隔离度27 dB。通过对比结构紧凑性、耦合效率、系统稳定性等相关指标发现,熔锥型侧面泵浦耦合器完全可以满足高功率光纤激光器和光纤放大器的使用要求。 相似文献
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The idea of modulating an analog signal onto a light beam which is transmitted down an optical fiber is as old as fiber optic communication. It is only in the 1980s, however, that laboratories have focused serious attention on trying to move analog modulation rates into the microwave region, above 1 gigahertz. Progress in microwave fiber optics capability has been dramatic over the past five years, from laboratory curiosity status to 6 GHz production devices in 1984 and 10 GHz production devices in 1986. All the components required for assembling X-band transmission links are now available as standard products. 相似文献
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John S. Harrison 《Fiber and Integrated Optics》2013,32(2):171-175
Broadband technology will have a huge impact on the future of telephony. Most local exchange carriers believe there will be one broadband network, which they control. In reality, there will be competition, or the threat of competitive entry, at all levels of the market. LECs must prepare for the changes that will accompany broadband. First and foremost, though, LECs should concentrate their efforts toward being price competitive. The prolongation of non-economic rate structures, particularly at the high-end of the market, is an open invitation for competitors to cream-skim. 相似文献
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