A polarization stable superfluorescent fiber source in double-pass backward configuration

• Main Authors: Gia-wei You, 游家瑋
• Other Authors: Lon. Wang
• Format: Others
• Language: en_US
• Published: 2004
• Online Access: http://ndltd.ncl.edu.tw/handle/30672369471795225715

碩士 === 國立臺灣大學 === 光電工程學研究所 === 92 === We use a modified and simpler method to obtain the absorption and emission cross sections of an Erbium-doped fiber. The cutback technique is used to obtain absorption and emission coefficients. Erbium ions concentration is obtained by the information of measured coefficients along with modeling of double-pass backward (DPB) superfluorescent fiber source (SFS). The obtained data are then used to simulate some properties of a DPB SFS. The mean wavelength of DPB SFS is optimized to be stable with respect to pump power and pump wavelength variations. Experimental results are compared to the simulation. We use the optimized parameters to characterize the polarization instability of a DPB SFS. Depolarizers are used to solve the polarization instability. We proposed a novel scheme in which the position of first depolarizer is different from the one published previously. The polarization stabilities in this novel and previous schemes are measured, and the results show that the scheme we propose is more efficient. The relations between temperature and mean wavelength are measured. A cost-effective DPB SFS without temperature control is demonstrated, and the deviation of calculated and measured mean wavelength is presented.