Highly stable tunable dual-wavelength Q-switched fiber laser for DIAL applications
Highly stable tunable dual-wavelength Q-switched fiber laser for DIAL applications
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DOI：
10.1109/lpt.2004.825991
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发表时间：
2004-05
影响因子：
2.6
通讯作者：
U. Sharma;Chang-Seok Kim;Jin-U. Kang
中科院分区：
文献类型：
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作者：
U. Sharma;Chang-Seok Kim;Jin-U. Kang
我们展示了一种稳定的双波长调q光纤激光器，用于差分吸收激光雷达，其绝对波长可调谐超过几纳米，波长间隔可在1.1至3.3 nm之间进行离散调谐。采用Sagnac回路饱和吸收滤波器也可实现单纵模工作。双波长连续波激光器的延迟自同差线宽测量显示，谱线宽非常窄，频率抖动（<40 kHz）。该技术具有波长可调、线宽窄、温度不敏感、高稳定性等优点，具有高效、经济、坚固、紧凑和轻便的特点，是机载激光雷达系统的一项很有前途的技术。
We demonstrate a stable dual-wavelength Q-switched fiber laser for applications in differential absorption Lidar with tunability in absolute wavelength over several nanometers and discrete tuning in wavelength spacing from 1.1 to 3.3 nm. Single longitudinal-mode operation is also achieved by employing Sagnac loop saturable absorber filter. The delayed self homodyne linewidth measurement of the dual-wavelength continuous-wave laser shows a very narrow spectral linewidth and frequency jitter (<40 kHz). The advantages of tunable wavelengths, narrow linewidth, temperature insensitivity, and high stability in an efficient, cost effective, rugged, compact and light system make it a promising technology for airborne Lidar systems.