Design of a New Ultra-sensitive Methane Sensor Based On Optical Approaches that Utilize Laser Diodes

Keskin A., Kaya N., Kaya G.

LASERS IN ENGINEERING, cilt.51, sa.1-5, ss.205-215, 2021 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 51 Sayı: 1-5
  • Basım Tarihi: 2021
  • Dergi Adı: LASERS IN ENGINEERING
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Compendex
  • Sayfa Sayıları: ss.205-215
  • Anahtar Kelimeler: Laser diode, methane, CH4, sensor, optics design, beam optic, optical path length, circular multi-pass cell (CMPC), CAVITY-ENHANCED ABSORPTION, WAVELENGTH-MODULATION SPECTROSCOPY, CELL, COMPACT, SPECTROMETER
  • Çanakkale Onsekiz Mart Üniversitesi Adresli: Evet

Özet

We design a new ultra-sensitive optical methane sensor by combining such optical approaches as appropriate use of absorption bands of methane by HITRAN database in the near-infrared (NIR) region, effective absorption path length in circular multi-pass optical cell, a wavelength modulation, and noise suppression with dual beam configuration. The design offers a compact and portable optical sensor for methane gas measurements in real time and high sensitivity. In the design, one can select different laser diode source to expand the selectivity labels for the interest many other trace gases. This is inexpensive and simpler experimental design without complexity of laser frequency locking and phase stabilization. It can find wide applications in many fields such as physical, environmental, and atmospheric research as well as physics, analytical chemistry, biology, medical diagnosis and process technology.