光纤激光功率溯源至低温辐射计方法

介绍了1.3 μm/1.5 μm光纤激光功率溯源至低温辐射计的测量方法,与传统溯源至绝对辐射计的方法相比较,最终利用低温辐射计法通过633 nm波长稳定光源标定陷阱式探测器,然后用陷阱式探测器将量值传递到陷阱式量传探测器,最后通过1310 nm/1550 nm通信用光功率稳定光源通过热释电光功率计标定InGaAs光电探测器并用于测量光纤功率。实验结果表明,溯源至低温辐射计的光纤功率测量方法在1310 nm及1550 nm波长点处对一标准光功率计修正系数测量的相对标准差分别为0.0011及0.0007,其测量不确定度可优于0.6％(k=2),在保证量值一致性的同时有效降低了测量不确定度,提高量值传递精度。

Study on Cryogenic Radiometer Traceability Method of Fiber Laser Power

The cryagenic radiometer traceability method of the 1.3 μm/1.5 μm fiber laser power is reported. The traditional method to trace to the absolute radiometer is analyzed. The trap detector is calibrated against the cryogenic radiometer at wavelength of 633 nm, and use to deliver quantity value to trap quantity detector, and than the InGaAs detector is calibrated by the pyroelectric radiometer with power-stablized laser source at wavelengths of 1310 nm and 1550 nm and used to measure fiber laser power. The measurement result shows that with this traceability method, the standard deviations of the optical power correction coefficients at wavelengths of 1310 nm and 1550 nm are 0.0011 and 0.0007, respectively, and the uncertainty of measurement is better than 0.6％ (k=2). This method can keep the consistence of quantity value decline measurement uncertainty and increase accuracy of quantity value delivery.