An optical rotation sensor based on dispersive slow-light medium |
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| Authors: | Wang Nan Zhang Yun-Dong Yuan Ping |
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| Affiliation: | Institute of Opto-electronics, Harbin Institute of Technology, Harbin 150080, China; Engineering Research Center of Optoelectronic Materials & Devices, School of Materials Science and Engineering, Dalian Jiaotong University, Dalian 116028, China; |
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| Abstract: | Slow light supported by electromagnetically induced transparency effect in dispersive medium is extremely susceptible with respect to Doppler detuning. In this paper, the Doppler effect induced by rotating dispersive medium was considered and the effect of the velocity of rotating dispersive medium on the group velocity was studied. Based on a dispersive slow-light medium, a high sensitive optical rotation sensor for measuring absolute rotation is proposed and analysed. The sensitivity of the rotation sensor is the group delay between the counterpropagationed wave packets in the device, and scales directly with square of the group index which can reach 102—108 orders of magnitude by selecting a proper dispersive medium. |
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| Keywords: | slow light dispersive medium absolute rotation group delay |
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