Changes in optical spectrum of photonic fiber with two counter propagating laser beams

Vladimir Vasinek; Jan Latal; Petr Koudelka; Petr Siska; Frantisek Hanacek; Jan Skapa

doi:10.1117/12.860219

18 August 2010 Changes in optical spectrum of photonic fiber with two counter propagating laser beams

Vladimir Vasinek, Jan Latal, Petr Koudelka, Petr Siska, Frantisek Hanacek, Jan Skapa

Proceedings Volume 7781, Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications IV; 77810Y (2010) https://doi.org/10.1117/12.860219
Event: SPIE Photonic Devices + Applications, 2010, San Diego, California, United States

Abstract

Photonic fiber with single mode couplers or splitters at each fiber end can be used as a sensitive structure for fiber sensing applications. The sensitive structure is created with two DFB lasers at λ = 1550 nm. Each laser is connected to opposite sides of photonic fiber provided with SM couplers. One DFB laser is isolated and its light goes through variable attenuation. Isolation is necessary for DFB laser stability. The second laser is DFB or F-P laser without any isolator. Its radiation is driven as with driven current so with DFB laser passing through photonic fiber. Small changes of DFB laser light passing through photonic fiber activate large changes in FP laser radiation. Temperature and pressure actuating on photonic fiber are examples of effects that are able to change properties of passing laser light. These changes can be measured with the help of photo detector at the second arm of SM couplers. Changes in optical spectra of F-P and DFB laser under temperature and pressure are the results.

Citation Download Citation

Vladimir Vasinek, Jan Latal, Petr Koudelka, Petr Siska, Frantisek Hanacek, and Jan Skapa "Changes in optical spectrum of photonic fiber with two counter propagating laser beams", Proc. SPIE 7781, Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications IV, 77810Y (18 August 2010); https://doi.org/10.1117/12.860219

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KEYWORDS

Photonic crystal fibers

Semiconductor lasers

Fiber lasers

Signal attenuation

Fiber couplers

Mirrors

Laser beam propagation

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