All-Optical Mode Conversion and Temperature Sensing via Transient Grating in Step-Index Fiber

Research output: Contribution to journalArticleResearchpeer review

Authors

  • Partha Mondal
  • Raktim Haldar
  • Vishwatosh Mishra
  • Shailendra K. Varshney

External Research Organisations

  • Indian Institute of Technology Kharagpur (IITKGP)
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Details

Original languageEnglish
Article number8529235
Pages (from-to)2175-2178
Number of pages4
JournalIEEE photonics technology letters
Volume30
Issue number24
Publication statusPublished - 15 Dec 2018
Externally publishedYes

Abstract

We demonstrate the formation of Kerr-induced transient long period grating in a standard single-mode fiber (SMF28) using sub-nanosecond laser pulses, which can be used to realize an efficient all-optical mode conversion and temperature sensing. The fiber supports $LP-{01}$ and $LP-{11}$ spatial modes at 1064-nm wavelength. The beating between two guided modes induces refractive index grating exploiting the Kerr effect. The probe beam co-propagating with the pump at the same wavelength but with different polarization exhibits efficient mode conversion efficiency from $LP-{01}$ to $LP-{11}$ mode. Temperature sensitivity is measured owing to the change in mode conversion efficiency due to the shift in resonant peak wavelength with the increase in temperature. The change in temperature is manifested by the change in spectral power of probe beam at the output. The experimental result demonstrates an average temperature sensitivity of 0.15 Watt/°C. The transient nature of the grating with high sensitivity makes our approach unique from the existing results and can open a route for potential applications.

Keywords

    fiber mode coupling, Fiber nonlinear optics, optical sensing

ASJC Scopus subject areas

Cite this

All-Optical Mode Conversion and Temperature Sensing via Transient Grating in Step-Index Fiber. / Mondal, Partha; Haldar, Raktim; Mishra, Vishwatosh et al.
In: IEEE photonics technology letters, Vol. 30, No. 24, 8529235, 15.12.2018, p. 2175-2178.

Research output: Contribution to journalArticleResearchpeer review

Mondal P, Haldar R, Mishra V, Varshney SK. All-Optical Mode Conversion and Temperature Sensing via Transient Grating in Step-Index Fiber. IEEE photonics technology letters. 2018 Dec 15;30(24):2175-2178. 8529235. doi: 10.1109/LPT.2018.2879975
Mondal, Partha ; Haldar, Raktim ; Mishra, Vishwatosh et al. / All-Optical Mode Conversion and Temperature Sensing via Transient Grating in Step-Index Fiber. In: IEEE photonics technology letters. 2018 ; Vol. 30, No. 24. pp. 2175-2178.
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abstract = "We demonstrate the formation of Kerr-induced transient long period grating in a standard single-mode fiber (SMF28) using sub-nanosecond laser pulses, which can be used to realize an efficient all-optical mode conversion and temperature sensing. The fiber supports $LP-{01}$ and $LP-{11}$ spatial modes at 1064-nm wavelength. The beating between two guided modes induces refractive index grating exploiting the Kerr effect. The probe beam co-propagating with the pump at the same wavelength but with different polarization exhibits efficient mode conversion efficiency from $LP-{01}$ to $LP-{11}$ mode. Temperature sensitivity is measured owing to the change in mode conversion efficiency due to the shift in resonant peak wavelength with the increase in temperature. The change in temperature is manifested by the change in spectral power of probe beam at the output. The experimental result demonstrates an average temperature sensitivity of 0.15 Watt/°C. The transient nature of the grating with high sensitivity makes our approach unique from the existing results and can open a route for potential applications.",
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AU - Haldar, Raktim

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