眼科准分子激光实时监控能量计

利用激光感生热电电压(LITV)效应制成了激光功率/能量计,它不仅能测量和记录每个脉冲的能量值及实时施加的脉冲总能量等信息,也能记录每个入射脉冲的响应波形,实现了对激光能量的实时监控。用此功率/能量计对248 nm准分子激光器进行模拟实验。测量结果表明,在1~50 Hz重复频率下,激光器输出能量的相对标准偏差在8.6%~10.7%。在模拟屈光手术设置参数下,对193 nm准分子激光器进行测量,表明此激光器输出能量的相对标准偏差在8.3%。将这种激光功率/能量计用于激光近视眼科手术中,对提高激光的切削质量和手术质量有重要意义。

A Real-Time Energy Meter for Medical Excimer Laser

A laser power/energy meter which is designed based on laser induced thermoelectric voltage (LITV) effect was reported. The laser power/energy meter can not only measure and record the energy of every input laser pulse and the total real-time energy, but also can record the response waveform of every input laser pulse. It realize the real-time controlling for laser energy. It was used to simulating experiment for 248 nm excimer laser. The result show that the relative standard deviation (RSD) of the laser output energy is 8.6%～10.7% with repetition frequency. And under the simulating setup parameters of refractive surgery, 193 nm excimer laser was measured, and its RSD is 8.3%. This kind of laser power/energy meter would be very significant in cornea refraction operation.