53-Line Multi-wavelength Generation of Brillouin/Erbium Fiber Laser with Enhanced Stokes Feedback Coupling

摘要

There have been increased research efforts for Multi-channel laser sources, to meet the possible demand from the wavelength multiplexed sensor/communication systems. Densely shifted wavelength spacing and stabilized/flattened peak powers between neighbor channels are two key performance parameters for real interest. In view of power consumption aspects, operation with low threshold is also important. Different approaches have been addressed in former studies [1 - 5] to fulfill above requirements, including a Brillouin fiber lasers. Of these, a hybrid Brillouin/Erbium fiber laser (BEFL) with feedback scheme is one of the strong candidates for realizing ultra dense wavelength operation. Recent studies followed different approaches in achieving feedback of higher order Stokes signals into the BEFL cavity, but were identical in its basic operation principle. The latest evolution was by D. Yu's 30 cahnnel operation with internal reflecting feedback circuit with a circulator and reflecting mirror [3], following Kim et al.'s 4 line operation with feedback coupler [4] and Cowle's 12 line operation [5].