Measurement of Acoustic Noise Induced Linewidth Broadening of Unpackaged Distributed Feedback Fiber Laser

Abstract:

The acoustic noise induced linewidth broadening phenomenon of distributed feedback fiber laser (DFB FL) is experimentally studied in this paper. Using the delayed self-homodyne method, we performed linewidth measurements on one unpackaged short cavity asymmetrical DFB FLs under increasing acoustic noise influence. The experiment results show the linewidth of tested laser increased from 5.8 KHz at 50 dB sound level to 32.5KHz at 80 dB sound level. This proves acoustic noise can drastically change the linewidth performance of unpackaged DFB FL. In addition, we performed another experiment on the same DFB FL to measure its linewidth with increasing tensile loads at fiber ends; the result shows a linewidth increase from 5.8 KHz at 0g tensile force to 51.2 KHz at 50g tensile force.

• Periodical: Applied Mechanics and Materials (Volumes 475-476)
• Pages: 838-842
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.475-476.838
• Online since: December 2013
• Authors: Jian Guo*, Jia Sheng Ni, Hai Feng Qi, Zhi Qiang Song, Gang Ding Peng
• Keywords: Acoustic Noise, Delayed Self-Homodyne Interferometry, DFB Fiber Laser, Linewidth Broadening, Packaging

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