Abstract
A rapid and sensitive detection method of incident light with different orthogonal polarization intensity ratios based on the double metal-cladding waveguide has been demonstrated. The middle layer of the waveguide is a uniaxial negative crystal lithium niobate, resulting in distinct coupling angles for TE and TM polarization. The isolation of the device can reach 42 dB due to well separation of TE and TM polarization. The quantitative experiments to measure ratio of TE to TM incident light have been carried out. Meanwhile, this method can support polarization detection in ultraviolet, visible, and infrared region. This method will play a significant role in optical information processing system and the integrated system.
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