Four-core optical fiber as a calorimetric gauge

GÜVENÇ S., gökbulut b., KÖSOĞLU G., YÜKSEL H. M., İNCİ M. N.

APPLIED OPTICS, cilt.55, sa.32, ss.9173-9177, 2016 (SCI-Expanded) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 55 Sayı: 32
  • Basım Tarihi: 2016
  • Doi Numarası: 10.1364/ao.55.009173
  • Dergi Adı: APPLIED OPTICS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.9173-9177
  • Marmara Üniversitesi Adresli: Evet

Özet

A four-core optical fiber is demonstrated as a calorimetric gauge for investigation of one-dimensional heat transfer measurements. Transient heat pulses from a Nd:YAG laser of 600 ms duration with a repetition rate of the order of 10 s are delivered onto the cleaved distal end face of the four-core fiber, aiming at one of the single cores only, which cause an optical path length difference between four guiding cores due to the temperature-induced change in the index of refraction and physical length of the targeted fiber core of concern. This results in a shift in the fringe pattern, which is operated in the reflection scheme. A phase shift of 0.43 +/- 0.015 rad is measured with a CMOS camera for 40 mW pulses. The thermal heat diffusion length in the selected fiber core is determined to be 2.8 mm, which contains 10.9 +/- 0.38 kJ/m(2)s heat, causing a temperature rise of 1.43 +/- 0.05 K. (C) 2016 Optical Society of America