3 October 2006 Wavelength monitoring of DWDM systems using a polarization interference filter without reference light
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Proceedings Volume 6353, Optical Transmission, Switching, and Subsystems IV; 635338 (2006) https://doi.org/10.1117/12.687101
Event: Asia-Pacific Optical Communications, 2006, Gwangju, South Korea
Abstract
A novel scheme for wavelength monitoring of DWDM systems was proposed in which the two transmission spectra of a polarization interference filter (PIF) are employed. The filter consists of a polarizer, a polarizing beamsplitter (PBS) and a birefringent plate sandwiched between them. The birefringent plate used is made of yttrium orthovanadate (YVO4) crystal. The two transmission spectra with perpendicular polarization directions are complementary in light transmittivity. By designing the filter and controlling its temperature appropriately, the intersections of the two transmission spectra can be utilized to monitor operating wavelengths in a DWDM network. This scheme doesn't need reference light for wavelength sensing. In addition, the monitoring sensitivity is twice as large as that in the way that only one transmission spectrum is utilized.
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Xiyao Chen, Xiyao Chen, Shengyu Chen, Shengyu Chen, Guimin Lin, Guimin Lin, Jianping Xie, Jianping Xie, Hai Ming, Hai Ming, "Wavelength monitoring of DWDM systems using a polarization interference filter without reference light", Proc. SPIE 6353, Optical Transmission, Switching, and Subsystems IV, 635338 (3 October 2006); doi: 10.1117/12.687101; https://doi.org/10.1117/12.687101
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