Researching of modulation of radiation intensity in multimode polymer fiber under selective excitation of modes

Authors

  • Василь Ігорович Варищук Lviv Polytechnic National University 12 Bandera street, Lviv, Ukraine, 79013, Ukraine
  • Василь Ярославович Татарин Lviv Polytechnic National University 12 Bandera street, Lviv, Ukraine, 79013, Ukraine
  • Ярослав Васильович Бобицький Lviv Polytechnic National University 12 Bandera street, Lviv, Ukraine, 79013, Ukraine

DOI:

https://doi.org/10.15587/1729-4061.2014.31520

Keywords:

polymer optical fiber, guided mode, mode coupling, phase shift, interference, intensity distribution of radiation, speckle pattern References

Abstract

When coherent light is propagated into the multimode fiber, a speckle pattern is formed at the exit face of fiber.When the fiber is vibrated, the speckle pattern is modulated due to mode coupling and phase modulation of the propagating modes.In this paper the effect of fiber bends on theintensity modulation of the off-axis modes in multimode polymer fiber has been investigated.

The theoretical analysis of a bend multimode fiber shows that the change of the speckle pattern intensity depends on the length of the fiber perturbed and amplitude of the vibration signal. When a highly coherent light source is used, the speckle pattern modulation is due primarily to phase modulation of the modes, and the component of the induced frequency overcomes the first and second harmonics with a difference of 13 dB and 18 dB, respectively, which allows clear identification of the induced vibration frequency. In contrast, when less coherent sources are used, the difference between fundamental vibration frequency and its harmonic components are small. Experimentally shown that when the off-axis modes are excited in multimode polymer fiber the amplitude of the output signal depends linearly on the amplitude of the vibration signal. The considered modulation mechanism can be effectively used to detection of the vibration and mechanical oscillation.

Author Biographies

Василь Ігорович Варищук, Lviv Polytechnic National University 12 Bandera street, Lviv, Ukraine, 79013

graduate student

The department of photonics

Василь Ярославович Татарин, Lviv Polytechnic National University 12 Bandera street, Lviv, Ukraine, 79013

Associate professor, Candidate of technical science

The department of photonics

Ярослав Васильович Бобицький, Lviv Polytechnic National University 12 Bandera street, Lviv, Ukraine, 79013

Professor, Doctor of technical sciences, head of the department

The department of photonics

References

  1. Goodman, J. W. (2007). Speckle Phenomena in Optics: Theory and Applications. Roberts&Co, 395.
  2. Busurin, V. I., Nosov, Yu. R. (1990). Volokonno-opticheskie datchiki: fizicheskie osnovyi, voprosyi rascheta i primeneniya. Moscow: Energoatomizd, 256.
  3. Liokumovich, L. B. (2007). Volokonno-opticheskie interferometricheskie izmereniya. Part 1. Volokonno-opticheskie interferometryi. SPb.: Izd-vo Politehn. un-ta, 110.
  4. Gupta, B., Bhargaw, H. N., Sardana, H. K. (2008). Qualifying fibre optic temperature sensor using speckle metrology. International Journal of Information Technology & Knowledge Management, 1, 337–350.
  5. Chang, X., Li, M., Han, X. (2009). Recent development and applications of polymer optical fiber sensors for strain measurement. Frontiers of Optoelectronics in China, 2, 362–367. doi: 10.1007/s12200-009-0057-1
  6. Varyshchuk, V., Bobitski, Y., Poisel, H. (2014). Using a multimode polymer optical fiber as a high sensitivy strain sensor. In Proc. of the 21st International Conference Mixed Design of Integrated Circuits & Systems, Lublin, Poland. doi: 10.1109/mixdes.2014.6872242
  7. Lujo, I., Klokoc, P., Komljenovic, T., Sipus, Z. (2008). Fiber-Optic Vibration Sensor Based on Multimode Fiber. Radioengineering, 17, 93–97.
  8. Rodriguez-Cobo, L., Lomer, M., Galindez, C., Lopez-Higuera, J. M. (2012). POF vibration sensor based on speckle pattern changes In Proc. of 22nd International Conference on Optical Fiber Sensors, Beijing, China. doi: 10.1117/12.970625
  9. Kingsley, S. A., Davies, D. E. N. (1978). Multimode optical fiber phase modulation and discrimination. Electron. Lett., 14, 322–325. doi: 10.1049/el:19780220
  10. Kajenski, P. J., Fuhr, P. L., Huston, D. R., (1992). Mode coupling and phase modulation in vibrating waveguides. Journal of Lightwave Technology, 10, 1297–1301. doi: 10.1109/50.156882
  11. El-Sherif, M. A., Hu, S., Radhakrishnan, J., Ko, F. K., Roth, D. J., Lerch, B. (1993). Optical response of sapphire multimode optical sensor for ceramic composite applications. In Proc. SPIE, 2072, Fiber Optic Physical Sensors in Manufacturing and Transportation, Boston, Massachusetts, United States.
  12. Radhakrishnan, J., El-Sherif, M. A. (1996). Analysis on spatial intensity modulation for fiber-optic sensor applications. Optical Fiber Technology, 2, 114–126. doi: 10.1006/ofte.1996.0013
  13. Kotov, O. I., Liokumovich, L. B., Markov, S. I. (2004). Registration of influence on optical fiber by mode-mode interference. In Proc. of SPIE 5381, Lasers for Measurements and Information Transfer, Bellingham, Washington, United States.
  14. Kosareva, L. I., Kotov, O. I., Liokumovich, L. B., Markov, S. I., (2000). Two mechanisms of phase modulation in multimode fiber-optic interferometers. Technical Physics Letters, 26, 70–74. doi: 10.1134/1.1262745

Downloads

Published

2014-12-23

How to Cite

Варищук, В. І., Татарин, В. Я., & Бобицький, Я. В. (2014). Researching of modulation of radiation intensity in multimode polymer fiber under selective excitation of modes. Eastern-European Journal of Enterprise Technologies, 6(9(72), 17–22. https://doi.org/10.15587/1729-4061.2014.31520

Issue

Vol. 6 No. 9(72) (2014): Information and controlling system

Section

Information and controlling system

License

Copyright (c) 2014 Василь Ігорович Варищук, Василь Ярославович Татарин, Ярослав Васильович Бобицький

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

The consolidation and conditions for the transfer of copyright (identification of authorship) is carried out in the License Agreement. In particular, the authors reserve the right to the authorship of their manuscript and transfer the first publication of this work to the journal under the terms of the Creative Commons CC BY license. At the same time, they have the right to conclude on their own additional agreements concerning the non-exclusive distribution of the work in the form in which it was published by this journal, but provided that the link to the first publication of the article in this journal is preserved.

A license agreement is a document in which the author warrants that he/she owns all copyright for the work (manuscript, article, etc.).
The authors, signing the License Agreement with TECHNOLOGY CENTER PC, have all rights to the further use of their work, provided that they link to our edition in which the work was published.
According to the terms of the License Agreement, the Publisher TECHNOLOGY CENTER PC does not take away your copyrights and receives permission from the authors to use and dissemination of the publication through the world's scientific resources (own electronic resources, scientometric databases, repositories, libraries, etc.).
In the absence of a signed License Agreement or in the absence of this agreement of identifiers allowing to identify the identity of the author, the editors have no right to work with the manuscript.
It is important to remember that there is another type of agreement between authors and publishers – when copyright is transferred from the authors to the publisher. In this case, the authors lose ownership of their work and may not use it in any way.