Semiconductor Optical Amplifier (SOA)-Fiber Ring Laser and Its Application to Stress Sensing

• 作者: Shinji Sekiya Tatsuro Suemune Yoshitaka Takahashi
• 来源期刊: 光学与光子学期刊(英文)
• 学科: 工学
• 关键词: FIBER LASER FIBER SENSOR Ring LASER Semiconductor OPTICAL Amplifier OPTICAL SENSOR
• 年，卷（期）: 2011,（4）
• 页码范围: 167-171
• 页数: 5页
• 分类号: TN2

摘要

We have developed a novel optical fiber ring laser using a semiconductor optical amplifier (SOA) as the gain medium, and taking advantage of polarization anisotropy of its gain. The frequency difference of the bi-directional laser is controlled by birefringence which is introduced in the ring laser cavity. The beat frequency generated by combining two counter-propagating oscillations is proportional to the birefringence, the fiber ring laser of the present study is, therefore, applicable to the fiber sensor. The sensing signal is obtained in a frequency domain with the material which causes the retardation change by a physical phenomenon to be measured. For the application to stress sensing, the present laser was investigated with a photoelastic material.