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    • 2. 发明申请
    • OPTICAL SENSING APPARATUS
    • 光学感应装置
    • US20060028650A1
    • 2006-02-09
    • US10465799
    • 2003-06-20
    • Roger CrickmoreDavid Curtis
    • Roger CrickmoreDavid Curtis
    • G01B9/02
    • G01K11/3206G01F1/6884
    • Optical sensing apparatus (10) for measuring the temperature and flow-rate of a fluid comprises a DFB fibre-laser (20) and an AO modulator (16) for modulating the power of pump radiation delivered thereto. Modulated pumping results in cyclical heating of a grating structure in the fibre-laser and hence wavelength variations in laser radiation output therefrom. The temperature and flow-rate of a fluid surrounding the fibre-laser may be inferred from the wavelength excursion and the minimum value of the wavelength respectively. The invention provides simple optical sensing apparatus capable of providing measurements of both the temperature and the flow-rate of a fluid.
    • 用于测量流体的温度和流速的光学传感装置(10)包括DFB光纤激光器(20)和用于调制传送到其上的泵浦辐射功率的AO调制器(16)。 调制泵送导致光纤激光器中的光栅结构的循环加热,并因此导致激光辐射输出的波长变化。 围绕光纤激光器的流体的温度和流速可以分别从波长偏移和波长的最小值推断出来。 本发明提供了能够提供流体的温度和流速的测量的简单的光学传感装置。