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Proceedings Paper

Development of a Mach-Zehnder interferometer based on a twin-core fiber and analysis of its thermal stability
Author(s): Luis Fernández; Pedro Torres; Jesús Causado; Rafael Betancur
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Paper Abstract

This work presents a research in which a Twin Core Fiber (TCF) has been employed for designing a Mach- Zehnder interferometer and its behavior under the effect of thermal gradients has been regarded. From the coupled modes theory can be deduced that under the phase-matched condition-that is similar propagation constants in both cores of a TCF, the energy transported in the cores is the same, which is fundamental for developing this interferometer. This research required to design a thermal cavity and an automation circuit for applying thermal cycles to a segment of the TCF. The temperature was recorded by means of a thermocouple placed inside the thermal cavity and its signal was introduced into the computer where an instrumentation software (Lab View) designed for monitoring and controlling variables used this signal for controlling the on-off states of a power resistor and a refrigeration system for raising and lowering the temperature, respectively. It was observed that the optical power variations in a point of the interference pattern presented a weak dependence with the thermal cycles.

Paper Details

Date Published: 25 August 2008
PDF: 11 pages
Proc. SPIE 7056, Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications II, 705613 (25 August 2008); doi: 10.1117/12.794916
Show Author Affiliations
Luis Fernández, Univ. Nacional de Colombia, Medellín (Colombia)
Pedro Torres, Univ. Nacional de Colombia, Medellín (Colombia)
Jesús Causado, Univ. Nacional de Colombia, Medellín (Colombia)
Rafael Betancur, Univ. Nacional de Colombia, Medellín (Colombia)


Published in SPIE Proceedings Vol. 7056:
Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications II
Shizhuo Yin; Ruyan Guo, Editor(s)

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