Abstract
A low cost, simple, and in-line liquid level sensor based on a dual-tapered fiber Mach-Zehnder interferometer (DTFMZI) is proposed. In this letter, the configuration, operation principle, experimental results, and discussion for the proposed fiber-optic liquid level sensor are investigated. Experimental results show that the proposed DTFMZI sensor is highly sensitive and linear in the response; a good sensitivity of ~2.8 nm/cm within the whole measurement range of 10 cm is achieved in this letter.
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