All-optical spectral linewidth reduction of lasers for coherent optical communication

作者：Pan Deng; Ke Changjian^*; Fu Songnian; Liu Yaping; Liu Deming; Willner Alan E

来源：Optics Letters, 2013, 38(24): 5220-5223.

DOI：10.1364/OL.38.005220

We propose and experimentally demonstrate an effective spectral linewidth suppression scheme for a commercial tunable laser source. By using a long-cavity, narrow-bandwidth stimulated Brillouin scattering filter and multifrequency-selection mechanism simultaneously, a single-longitudinal-mode laser output with linewidth suppression from similar to 3 MHz to less than 20 kHz is successfully achieved in the whole C-band. Meanwhile, insertion loss of similar to 5 dB and a side-mode suppression ratio improvement of similar to 20 dB at a typical output wavelength of 1552.520 nm are obtained. The scheme is experimentally verified to be wavelength independent in the C-band and characterized with good performance of wavelength and power stability.

• 出版日期2013-12-15
• 单位华中科技大学