Low loss photonic components in high index bismuth borate glass by femtosecond laser direct writing.
Low loss photonic components in high index bismuth borate glass by femtosecond laser direct writing.
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DOI：
10.1364/oe.16.016215
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发表时间：
2008-09
期刊：
影响因子：
3.8
通讯作者：
Weijia Yang;C. Corbari;P. Kazansky;K. Sakaguchi;I. Carvalho
中科院分区：
文献类型：
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作者：
Weijia Yang;C. Corbari;P. Kazansky;K. Sakaguchi;I. Carvalho
采用飞秒激光直写技术在高折射率硼酸铋玻璃中制备了单模低损耗光波导。确定了一组特定的写入参数，使波导在1.55微米处与标准单模光纤完全模式匹配，总插入损耗约为1 dB，传播损耗低于0.2 dB/cm。还演示了Y型分束器和定向耦合器等光子器件。它们的性能和理论预测的基础上的波导特性的表征之间的密切协议。最后，通过对1.46 μ m飞秒激光脉冲自相位调制的分析，测得波导的非线性折射率为6.6 × 10 ~（-15）cm ~（2）/W。通过长度为1.8 cm的波导，证明了透射光源的展宽为500 nm。
Single mode, low loss waveguides were fabricated in high index bismuth borate glass by femtosecond laser direct writing. A specific set of writing parameters leading to waveguides perfectly mode matched to standard single-mode fibers at 1.55 microm with an overall insertion loss of approximately 1 dB and with propagation loss below 0.2 dB/cm was identified. Photonic components such as Y-splitters and directional couplers were also demonstrated. A close agreement between their performances and theoretical predictions based upon the characterization of the waveguide properties is shown. Finally, the nonlinear refractive index of the waveguides has been measured to be 6.6 x 10(-15) cm(2)/W by analyzing self-phase modulation of the propagating femtosecond laser pulse at the wavelength of 1.46 microm. Broadening of the transmitted light source as large as 500 nm was demonstrated through a waveguide with the length of 1.8 cm.