title: Self-gauged fiber-optic micro-heater with an operation temperature above 1000°C.
abstract: We report a fiber-optic micro-heater based on a miniature crystalline silicon Fabry-Perot interferometer (FPI) fusion spliced to the endface of a single-mode fiber. The silicon FPI, having a diameter of 100 μm and a length of 10 or 200 μm, is heated by a 980 nm laser diode guided through the lead-in fiber, leading to a localized hot spot with a temperature that can be conveniently tuned from the ambient temperature to >1000°C in air. In the meantime, using a white light system operating in the 1550 nm wavelength window where the silicon is transparent, the silicon FPI itself also serves as a thermometer with high resolution and high speed for convenient monitoring and precise control of the heater temperature. Due to its small size, high temperature capability, and easy operation, the micro-heater is attractive for applications in a variety of fields, such as biology, microfluidics system, mechanical engineering, and high-temperature optical sensing. As an example, the application of this micro-heater as a micro-boiler and micro-bubble generator has been demonstrated.
authors.forename: Guigen
authors.initials: G
authors.lastname: Liu
authors.forename: Qiwen
authors.initials: Q
authors.lastname: Sheng
authors.forename: Dustin
authors.initials: D
authors.lastname: Dam
authors.forename: Jiong
authors.initials: J
authors.lastname: Hua
authors.forename: Weilin
authors.initials: W
authors.lastname: Hou
authors.forename: Ming
authors.initials: M
authors.lastname: Han