用于CO2探测的高功率1572nm可调谐光源

1572nm high power tunable laser source for atmospheric CO_2 measurement

为了研发一种应用于CO2探测激光雷达的全光纤宽带可调谐高功率光源,以CO2的超精确吸收谱为基础,结合外腔可调谐激光器和L波段光纤放大器,进行了理论分析和实验验证,取得了针对1572nm附近吸收峰的连续调谐窄线宽光源的数据,并通过铒镱双包层光纤放大器将输出光功率提升到瓦级以上。结果表明,光源输出功率大于10dBm,边模抑制比大于50dB,线宽500kHz左右,1572nm放大器最大增益可达25.13dB,输出光功率达到1W以上。该光源具有体积小、低功耗和低成本的优势,对实现更大范围的空间CO2浓度探测分析有一定的帮助。

An all fiber, compact high power tunable laser source for atmospheric CO2 measurement was investigated. Based on the ultra precise atmospheric CO2 absorption spectrum, a tunable seed laser was designed with the peak absorption around 1572nm, and then its output power was amplified to the order of watt level with an Er-Yb double cladding fiber amplifier. The experimental results show that the laser can provide 10dBm output power with 50dB side mode suppression, 500kHz linewidth;the max gain of the fiber amplifier is 25. 13dB, output power is 1W. This laser possesses a small size, low power consumption and low cost it builds a steady foundation for the wider range of Atmospheric CO2 measurements.