Ming Tian

Micro Multicavity Fabry–Pérot Interferometers Sensor in SMFs Machined by Femtosecond Laser

We propose and demonstrate a compact micromulticavity Fabry–Pérot (FP) optical fiber tip sensor for refractive-index (RI) and temperature measurement, which is fabricated by laser micromachining. The fabrication process of the sensor offers a quite simple way to fabricate compact in-line FP at a low cost. At the end of the single-mode fiber, there is a short air FP cavity, which forms a multicavity together with the fiber flat face tip. Two independent cavities exist in our sensor, and the air cavity is used for RI sensing and the glass cavity for temperature sensing, thus, avoiding the temperature and RI cross-sensitivity. The measurement results show that the in-line FPI exhibits an RI sensitivity of 1074.36 nm/RIU and a temperature sensitivity of 10.6

Research on strain sensing based on passively mode-locked fiber laser using saturable absorber

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Chromatic dispersion measurement using single sideband spectrum phase difference detection for OOK signal link.

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All-solid D-shaped photonic fiber sensor based on surface plasmon resonance

Based on a passively mode-locked fiber laser, we proposed a new method of strain sensing. The laser cavity optical length variation, mainly caused by strain and temperature, is corresponded with the repetition frequency change which can be easily measured by spectrum analyzer. Theoretical calculation shows that the device can measured nano-strain in the optical fiber. Experimental result shows that the sensing signal is very sensitive to the environmental change.

A single-mode fiber sensor based on core-offset inter-modal interferometer

In this paper, we theoretically and experimentally demonstrated the residual chromatic dispersion (CD) measuring of 10Gbit/s NRZ and 40Gbit/s NRZ/RZ links by using a novel single sideband (SSB) spectrum phase difference detection technology. This method can differentiate positive and negative residual CD of the fiber link, the measuring range is dependent on frequency difference (FD) of two local oscillator (LO) and the FD can be adjusted up to CD range. This method is independent on data rate for intensity modulation direct detection (IM/DD) links. In condition of FD of 4 GHz, the measuring range was around ± 1000 ps/nm and resolution was better than 5 ps/nm for 10G NRZ link.