Fiber loop ring down spectrometer optical based sensor for trace chemical detection

Date

2016-04-11

Author

Yolalmaz, Alim
Esentürk, Okan
Danışman, Mehmet Fatih
Hanifehpour, Farhad

Metadata

Show full item record

Item Usage Stats

196
views

0
downloads

Fiber loop ring down (FLRD) is a time domain multi-functional sensing, characterization, detection technique. FLRD technique is used to sense temperature, pressure, strain, biological cells, refractive index, and chemical species. FLRD has high accuracy, high selectivity, ability of remote control and rapid response. In this project, two FLRD spectrometers working at 800 nm (figure 1) and 1535 nm (figure 2) were set up for sensing different chemical analytes like C2H2, CO2, Ar, N2, DMSO, DMF, H2O, C2H6O, C3H6O. After modification of sensor region parameters like diameter and length of etched fiber, interaction distance of sample and laser pulse, many of specified samples have been detected and characterized until now. Recently the spectrometers have been improved for sensing low concentration of analytes and methodology has been developed for experimental process. In future, FLRD spectrometers will be used for detection of dangerous trace chemicals CO, NO, etc. We also have worked with etched fiber and we have looked for the best geometrical parameters for both weak and strong absorbers. Moreover, we plan to use hollow and holey fiber to set up FLRD spectrometers to decrease minimum detectable concentration.

URI

https://hdl.handle.net/11511/76040

Conference Name

14th IUVSTA School on Nano-Optics,(11 - 15 April 2016)

Collections

Department of Chemistry, Conference / Seminar

Suggestions

OpenMETU
Core

Fiber loop ring down spectroscopy for trace chemical detection Cengiz, Betül; Danışman, Mehmet Fatih; Esentürk, Okan; Department of Chemistry (2013) Fiber loop ring down (FLRD) spectroscopy is a sensitive spectroscopic technique that is based on absorption and it is convenient for trace chemical detection. Different FLRD systems are being improved in order to increase their sensitivity. In FLRD spectroscopy, detection of a sample is done by measuring of a leaking light at each trip within an optical cavity. Intensity of leaking light has an exponential decay where it is reduced by absorption of sample and scattering of light. In this project, two FLRD s...
Utilization of fiber loop ring down technique for sensing applications Yolalmaz, Alim; Danışman, Mehmet Fatih; Bek, Alpan; Department of Micro and Nanotechnology (2017) Fiber loop ring down (FLRD) spectroscopy is based on multiple interaction of laser light with sample/analyte. It is evolved from cavity ring down spectrometer with addition of optical fiber. Measurement accuracy rises with multiple interactions and this enhances the minimum detection limit compared to other spectrometers using single pass interaction such as FTIR, UV-VIS spectrometer. The other advantages of this technique are its insensitivity to laser fluctuation and detector performance. In this study, t...
Simultaneous phase and amplitude control using triple stub topology and its implementation using rf mems technology Demir, Şimşek; Akın, Tayfun (EPO, 2012-8-02) This invention relates to techniques for controlling the amplitude and the insertion phase of an input signal in RF applications. More particularly, this invention relates to phase shifters, vector modulators, and attenuators employing both semi-conductor and RF microelectromechanical systems (MEMS) technologies.
Simultaneous phase and amplitude control using triple stub topology and its implementation using rf mems technology Demir, Şimşek; Akın, Tayfun (United States Patent and Trademark Office, 2009-9-15) This invention relates to techniques for controlling the amplitude and the insertion phase of an input signal in RF applications. More particularly, this invention relates to phase shifters, vector modulators, and attenuators employing both semi-conductor and RF microelectromechanical systems (MEMS) technologies.
Electrical Performance Limits of Fine Pitch Interconnects for Heterogeneous Integration Durgun, Ahmet Cemal; Aygun, Kemal; Mahajan, Ravi; Hoang, Tim Tri; Shumarayev, Sergey Yuryevich (2019-01-01) Heterogeneous integration facilitates faster design cycles with optimal functional IP module and silicon node combinations, but requires ultra-high bandwidth for the die-to-die communications. Fine pitch interconnects can meet such high bandwidth demands with simpler circuits, lower power and less latency. Hence, it is of utmost importance to understand the performance of these interconnects at different speeds and channel lengths. This paper focuses on a parametric study over the basic design parameters of...

Citation Formats

A. Yolalmaz, O. Esentürk, M. F. Danışman, and F. Hanifehpour, “Fiber loop ring down spectrometer optical based sensor for trace chemical detection,” presented at the 14th IUVSTA School on Nano-Optics,(11 - 15 April 2016), Braga, Portugal, 2016, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/76040.