光学
双折射
扭转(腹足类)
波长
物理
激光器
材料科学
极化(电化学)
光纤激光器
光电子学
医学
化学
外科
物理化学
作者
Danqi Feng,Yangxu Tang,Yuwei Liu,Ming Deng
出处
期刊:Optics Letters
[The Optical Society]
日期:2023-07-28
卷期号:48 (16): 4364-4364
被引量:2
摘要
We propose and demonstrate a new, to the best of our knowledge, technique to implement a high-speed and highly sensitive torsion sensor based on a coupled optoelectronic oscillator (COEO) incorporating nonlinear polarization rotation (NPR). The COEO consists of a mode-locked laser loop and an OEO loop. In the laser loop, the NPR effect effectively induces intensity- and wavelength-dependent loss, which acts as a Lyot birefringent fiber filter. When twisting the polarization-maintaining fiber (PMF), the transmission of the filter varies as well as the laser output wavelength. In the OEO loop, the optical source is provided by the output signal of the mode-locked laser. The variation in the optical carrier wavelength changes the time delay and the oscillation frequency of the OEO loop. The oscillation frequency shift is a linear function of the twist angle. Sensitivities of -60.006 Hz/deg over 360° for a 48 cm PMF and -180.996 Hz/deg over 92° for a 22 cm PMF are achieved.
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