Fig. 1. Fiber microfluidic sensor fabricated by femtosecond laser. (a) Diagram of femtosecond laser processing; (b) diagram of the device; (c) microscopic photograph of real-time processing of laser induced water breakdown

Fig. 2. Microscopic photograph of the microchannel. (a) Top view; (b) bottom view; (c) side view

Fig. 3. Reflection spectra of the fiber microfluidic sensor

Fig. 4. Temperature response characteristics of sensors. (a) Reflection spectra of the sensor at different temperatures; (b) F-P and FBG wavelengths as function of temperature

Fig. 5. Refractive index response characteristics of sensors. (a) Reflection spectra of the sensor at different refractive indices; (b) F-P and FBG wavelengths as function of the refractive index