Wide and fast wavelength-swept mode-locked fiber laser based on dispersion tuning and its application to dynamic FBG sensing

Yuichi Nakazaki; Shinji Yamashita; Kevin Hsu

doi:10.1117/12.785946

16 May 2008 Wide and fast wavelength-swept mode-locked fiber laser based on dispersion tuning and its application to dynamic FBG sensing

Yuichi Nakazaki, Shinji Yamashita, Kevin Hsu

Author Affiliations +

Proceedings Volume 7004, 19th International Conference on Optical Fibre Sensors; 70043R (2008) https://doi.org/10.1117/12.785946
Event: 19th International Conference on Optical Fibre Sensors, 2008, Perth, WA, Australia

Abstract

A fiber Bragg grating (FBG) sensor using wide and fast mode-locked wavelength-swept laser is demonstrated. The key device is the optical source, wide and fast wavelength-tunable mode-locked fiber laser based on dispersion tuning. This laser has wide tuning range (over 100nm) and a fast tunable speed (up to 20 kHz). Hence, it is suited for the dynamic FBG sensor system. Our sensor system enables dynamic measurement of strain in real-time at a high measurement rate. In this system,the signals of the sensor are obtained by analyzing temporal waveforms of refleceted light from the FBG without observing the spectrum. A measurement speed as high as 1 kHz is achieved when the wavelength-tunable source is swept at 1 kHz rate. The stability (indicated by the standard deviations of the results) is 30-60 pm in optical spectrum.

Citation Download Citation

Yuichi Nakazaki, Shinji Yamashita, and Kevin Hsu "Wide and fast wavelength-swept mode-locked fiber laser based on dispersion tuning and its application to dynamic FBG sensing", Proc. SPIE 7004, 19th International Conference on Optical Fibre Sensors, 70043R (16 May 2008); https://doi.org/10.1117/12.785946

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