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2. 发明申请

WO2004073172A2 METHOD AND APPARATUS FOR GENERATION AND TRANSMISSION OF HIGH ENERGY OPTICAL PULSES FOR LONG RANGE MEASUREMENTS 审中-公开
标题翻译：用于长距离测量的高能光学脉冲发生和传输的方法和设备
公开(公告)号：WO2004073172A2
公开(公告)日：2004-08-26
申请号：PCT/GB2004/000565
申请日：2004-02-11
申请人： SENSORNET LIMITED , FARHADIROUSHAN, Mahmoud , PARKER, Tom, Richard
发明人： FARHADIROUSHAN, Mahmoud , PARKER, Tom, Richard
IPC分类号： H04B
CPC分类号： G01K11/32 , G01D5/35364
摘要： A method and apparatus for generating and transmitting high energy optical pulses are described. Distributed temperature sensors usually use Raman scattering in optical fibres as the means to determine the temperature. Here, light from a laser source is sent down a fibre and the small amount of light that is scattered back towards the source is analysed. As the fibre length increases, the resolutions of the temperature and loss measurements become poorer. This is because losses in an optical fibre attenuate the signal. An obvious solution to this problem is to launch more light into the fibre to compensate for the losses but stimulated Raman scattering limits how much light may be launched. The present invention solves this problem by using a pulse conversion method to maximise the resultant pulse energy while the power is kept below SRS threshold.
摘要翻译：描述了用于产生和传输高能光脉冲的方法和设备。分布式温度传感器通常使用光纤中的拉曼散射作为确定温度的手段。这里，来自激光源的光线沿着光纤发送，并且分析向源头散射的少量光线。随着光纤长度的增加，温度和损耗测量的分辨率变得更差。这是因为光纤中的损耗会衰减信号。这个问题的一个明显的解决方案是向光纤中发射更多的光来补偿损失，但是受到拉曼散射的限制会限制可以发射多少光。本发明通过使用脉冲转换方法来解决这个问题，以在功率保持在SRS阈值以下时使得到的脉冲能量最大化。

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