Investigation of a tuneable mode-locked fiber laser for application to multipoint gas spectroscopy
Investigation of a tuneable mode-locked fiber laser for application to multipoint gas spectroscopy
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DOI：
10.1109/jlt.2004.824530
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发表时间：
2004-03
影响因子：
4.7
通讯作者：
G. Whitenett;G. Stewart;Hongbo Yu;B. Culshaw
中科院分区：
文献类型：
--
作者：
G. Whitenett;G. Stewart;Hongbo Yu;B. Culshaw
本文报道了一种锁模光纤激光系统在气体光谱中作为多点多气体传感器的工作原理。波长选择是通过使用多个啁啾光栅和利用啁啾光栅的色散特性进行微调来完成的。锁模频率（三次谐波）每千赫变化的调谐速率为/spl sim/0.014 nm，适用于气体吸收谱线的扫描。讨论了对调谐有重要影响的关键问题，包括增益平坦化和极化漂移。本文研究了锁模系统中传感器单元的多路复用方法。给出了一个双腔系统的初步结果来验证该技术的原理。
This paper reports on an initial investigation into the operation of a mode-locked fiber laser system for application in gas spectroscopy as a multipoint multigas sensor. Wavelength selection is performed by use of multiple chirped gratings and fine tuning by using the dispersion properties of the chirped gratings. A tuning rate of /spl sim/0.014 nm per kHz change in mode-lock frequency (at the third harmonic) has been demonstrated, which is suitable for scanning across gas absorption lines. Key issues that have an important bearing on the tuning are discussed, including gain flattening and polarization drift. This paper investigates a method of multiplexing the sensor cells with the mode-locked system. Preliminary results for a two cavity system are presented to verify the principles of the technique.