Yin Longfei, Luo Bin, Xiong Junyu, Guo Hong
Opt Express. 2016 Mar 21;24(6):6088-93. doi: 10.1364/OE.24.006088.
A tunable rubidium excited state Voigt atomic optical filter working at optical communication wavelength (1.5 μm) is realized. The filter achieves a peak transmittance of 57.6% with a double-peak structure, in which each one has a bandwidth of 600 MHz. Benefiting from the Voigt type structure, the magnetic field of the filter can be tuned from 0 to 1600 gauss, and a peak transmittance tunability of 1.6 GHz can thus be realized. Different from the excited state Faraday type filter, the pump efficiency in the Voigt filter is affected a lot by the pump polarization. Measured absorption results of the pump laser and transmittances of the signal laser both prove that the vertical linear polarization pumping is the most efficient in the Voigt filter.
实现了一种工作在光通信波长（1.5μm）的可调谐铷激发态沃伊特原子光学滤波器。该滤波器具有双峰结构，峰值透过率达到57.6%，每个峰的带宽为600MHz。得益于沃伊特型结构，滤波器的磁场可在0至1600高斯范围内调谐，从而可实现1.6GHz的峰值透过率可调谐性。与激发态法拉第型滤波器不同，沃伊特滤波器中的泵浦效率受泵浦偏振的影响很大。泵浦激光的测量吸收结果和信号激光的透过率均证明，在沃伊特滤波器中垂直线性偏振泵浦效率最高。
