Optical Fiber Array Based Simultaneous Parallel Monitoring Of Resonant Cantilever Sensors In Liquid
| Autor: | Hakan Urey, Aref Mostafazadeh, Goksen G. Yaralioglu |
|---|---|
| Přispěvatelé: | Özyeğin University, Yaralıoğlu, Göksenin |
| Rok vydání: | 2016 |
| Předmět: |
Optical fiber
Cantilever Materials science 02 engineering and technology 01 natural sciences Electromagnetic interference law.invention 010309 optics Sensor array Interference (communication) law 0103 physical sciences Electronic engineering Laser power scaling Electrical and Electronic Engineering Instrumentation Phase based resonance tracking business.industry Amplifier Detector Metals and Alloys Magnetic actuation Optical fiber array readout 021001 nanoscience & nanotechnology Condensed Matter Physics Surfaces Coatings and Films Electronic Optical and Magnetic Materials Multichannel lock-in amplifier Optoelectronics MEMS sensors in liquid Multichannel resonant frequency tracking 0210 nano-technology business |
| Popis: | Due to copyright restrictions, the access to the full text of this article is only available via subscription. This paper reports a novel method for simultaneous resonance monitoring of MEMS cantilevers using phase based dynamic measurements without any electrical connections to the sensor array. MEMS cantilevers are made of electroplated nickel and actuated remotely with magnetic field using an electro-coil. To our knowledge this is the first demonstration of simultaneous parallel optical monitoring of dynamic mode micro-cantilever array in liquid environment. Illumination is generated using a laser source and a diffractive pattern generator, which provides 500 μW laser power per channel. A compact fiber array based pick-up was built for optical readout. Its main advantages are easy customization to different size and pitch of sensor array, and good immunity to electrical noise and magnetic interference as the photo detectors are located away from the electro-coil. The resonant frequency of the cantilever is tracked with a custom multi-channel lock-in amplifier implemented in software. For demonstrating the stability and sensitivity of the system we performed measurements using glycerol solutions with different viscosities. Measured phase sensitivity was 0.9°/1% of Glycerol/DI-water solution and the standard deviation of measured phase was 0.025°. The resulting detection limit for Glycerol/DI-water solution was 280 ppm. The proposed method showed robust results with low laser power and very good noise immunity to interference signals and environmental vibrations. The sensor technology demonstrated here is very significant as it is scalable to larger arrays for simultaneous and real- time monitoring of multiple biological and chemical agents during fluid flow. TÜBİTAK |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|