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    • 3. 发明申请
    • FIBER OPTIC BIREFRINGENT THERMOMETER AND METHOD FOR MANUFACTURING THE SAME
    • 光纤双向温度计及其制造方法
    • WO2012003869A1
    • 2012-01-12
    • PCT/EP2010/059722
    • 2010-07-07
    • ABB RESEARCH LTDWÜEST, RobertBÜHLER, TiloBUCHTER, Florian
    • WÜEST, RobertBÜHLER, TiloBUCHTER, Florian
    • G01K11/32
    • G01K11/32G01K15/00Y10T29/49771
    • A fiber optic thermometer is described that uses a birefringent polarization maintaining sensing fiber (13) as well as a single-mode transmission fiber (8) for transmitting the optical signals between the sensing head and an optoelectronic module (1). The optoelectronic module (1) contains two light sources (2a, 2b) operating at different spectral ranges. The unpolarized light from the light sources is sent through the transmission fiber (8), sent through a polarizer (11) and coupled into both birefringence axis of the sensing fiber (13). The waves are reflected at a reflector (14) at a remote end (13b) of the sensing fiber (13), whereupon it returns through the sensing fiber (13), the polarizer (11) and the transmission fiber (8). By analyzing the returned signal for both spectral ranges, a robust temperature signal can be derived. This thermometer design obviates the need for using a polarization maintaining fiber and polarization maintaining connectors between the optoelectronic module (1) and the sensor head.
    • 描述了使用双折射偏振保持感测光纤(13)以及用于在感测头和光电子模块(1)之间传输光信号的单模传输光纤(8)的光纤温度计。 光电子模块(1)包含在不同光谱范围内工作的两个光源(2a,2b)。 来自光源的非偏振光通过传输光纤(8)传送,通过偏振器(11)传送并耦合到传感光纤(13)的双折射轴上。 这些波在感测光纤(13)的远端(13b)处的反射器(14)反射,于是它通过感测光纤(13),偏振器(11)和传输光纤(8)返回。 通过分析两个光谱范围的返回信号,可以导出鲁棒的温度信号。 该温度计设计避免了在光电模块(1)和传感器头之间使用偏振保持光纤和偏振保持连接器的需要。