A new type of temperature compensated birefringent optical fibre is reported. The proposed fibre is designed aiming to minimising the stress birefringence by matching the thermal expansion coefficients between the core and the cladding and maximising the geometric birefringence by increasing the refractive index difference between the core and the cladding and increasing the core ellipticity. The optimum dopant concentrations satisfying the requirements is determined by solving a set of nonlinear algebraic equations. The fibre aimed at satisfying the requirements is fabricated and characterised. The experimental results show that the temperature dependence of the fibre birefringence is 6.97 X 10(-4) /degrees C. Methods of further improvement of the compensation are discussed and an alternative dopant material, titanium, for the improvement is suggested. [References: 24]
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机译：报道了一种新型的温度补偿双折射光纤。设计提出的光纤旨在通过匹配纤芯和包层之间的热膨胀系数来最小化应力双折射，以及通过增加纤芯和包层之间的折射率差并增加纤芯椭圆率来最大化几何双折射。通过求解一组非线性代数方程来确定满足要求的最佳掺杂剂浓度。旨在满足要求的光纤已被制造和表征。实验结果表明，光纤双折射的温度依赖性为6.97 X 10（-4）/℃。讨论了进一步改善补偿的方法，并提出了另一种掺杂剂材料钛，用于改进。 [参考：24]
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