Narrow-linewidth single-polarization frequency-modulated Er-doped fiber ring laser

作者：Ou Pan^*; Jia Yudong; Cao Bin; Zhang Chunxi; Hu Shuling; Fong Di

来源：Chinese Optics Letters, 2008, 6(11): 845-847.

DOI：10.3788/COL20080611.0845

We demonstrate a 1550-nm narrow-linewidth fiber ring laser with stable single polarization by using single-mode Er-doped fiber as active fiber and saturable absorber. A polarization-maintaining circulator is used to acquire single-polarization laser light with the degree of polarization of 99.8%-99.9%. The linewidth measured using a delayed self-heterodyne method is less than 0.5 kHz. Frequency of the fiber laser can be modulated by driving the waveguide phase modulator with proper voltage. A Mach-Zehnder interferometer with the optical path difference between two arms of about 36 km is used to study the long-distance coherent detection of the fiber laser for frequency-modulated continuous-wave application.

• 出版日期2008-11-10
• 单位北京航空航天大学