A novel optical fiber probe has been developed to provide mechanical stability to microbubbles generated in fluids, the tip of the fiber is etched with hydrofluoric acid to pierce a truncated horn that fastens the microbubbles to the fiber tip and prevents misalignment or detachment caused by convection currents, vibrations or shocks in the liquid. Microbubbles are photo-thermally generated on the etched fiber and used as Fabry-Perot cavity sensor. Two methods were used to interrogate the probe: the first one, in the wavelength domain, is suitable for calibration in static or quasi static situations; the second one, in the time domain, can be used in dynamic environments. Experimental results in the wavelength domain show that the microbubble size rises linearly with temperature and decreases with the inverse of pressure; the average slopes are 27.1 μm/°C and 88.3 μm/bar respectively. Dynamic variations of temperature have been measured in the time domain, temperature changes down to 0.007 °C have been detected at a readout rate of 10 s-⁻¹. Bubbles have been subjected to pressure shocks of 2.4 bar at a speed of 25 bar/s, pressure changes of 3.4 mbar have been resolved in the time domain at a readout rate of 20,000 s⁻¹.

已经开发出一种新颖的光纤探针，以为流体中产生的微气泡提供机械稳定性，用氢氟酸蚀刻光纤的尖端以刺穿截短的角，该角将微气泡固定在光纤尖端上，并防止因对流电流而导致的未对准或分离，液体中的振动或冲击。微气泡在蚀刻的光纤上产生光热，并用作Fabry-Perot腔传感器。使用两种方法来探询探头：第一种在波长域中，适用于在静态或准静态情况下进行校准；第二个是时域的，可以在动态环境中使用。波长域的实验结果表明，微气泡的大小随温度线性增加，随压力的倒数减小。平均坡度为27。1μm/°C和88.3μm/ bar。在时域中测量了温度的动态变化，以10 s的读出速率检测到温度低至0.007°C-^-1。气泡以25 bar / s的速度经受了2.4 bar的压力冲击，在时域中以20,000 s ^-1的读出速率解决了3.4 mbar的压力变化。