Because of the pulse light source ' s characteristics , it ' s no way to measure the spectrum with normal techniques which are used for ordinary light sources 由于脉冲光源自身特点的原因,决定了不能用普通的光源光谱测量方法对其进行测量。
Intense pulsed light offers significant advantages over traditional laser systems , such as lower cost and more flexibility in safely adapting to different skin types , hair colors and treatments 比较于传统镭射光,脉冲光灯源提供了绝对的优势,包括更低的成本,更佳的安全性
The experiment results have proved that the measure system is of high accuracy . the research on pulse light source spectrum measurement has reached the anticipated demands 经过实际使用,本系统取得了满意的结果,能够满足脉冲光源生产单位的测试要求,达到了研究的预期目的。
By the former experiment , we know that the fiber optic gas sensor with the pulse light of the blue light led can emit the steady fluorescence . so we can detect the density of oxygen through 技术方案上采用数字脉冲激励led蓝紫光源照射敏感元件获得稳定的荧光信号,再通过测量荧光寿命检测氧气浓度。
At the same time , it uses a frequency translator to obtain a frequency shift , which is equal to the brillouin frequency in fiber . then the detecting pulsed light and the cw reference light can coherent . this method greatly improved the system ’ s sensitive and signal to noise ratio ( snr ) 同时在探测光路中引入一个光移频环路,使探测光移频后再经光纤中布里渊频移,其后向布里渊散射光频率与参考光束大致相当,可进行相干自外差探测,大大提高了系统的探测灵敏度以及系统的信噪比。