2.12GHzで安定化したハーモニックモードロックファイバリングレーザ

概要

論文の詳細を見る
Advancement in Erbium doped fiber(EDF) based lasers requires their highly stable operation in GHz region. The mode-locked EDF ring lasers are attractive because they can generate soliton like transformed-limited optical pulses with lower noise, high power conversion efficiency and low temperature sensitivity. In general, harmonic mode-locking (HML) technique is employed to obtain very high pulse rates where the optical pulses are seen to be quite unstable in GHz regime owing to several reasons. but a competition among various independent groups of the axial modes to saturate the gain medium is the main. Therefore, this problem has attracted considerable attention, recently. We proposed a novel method of amplitude modulated harmonic mode-locking (AM-HML) to establish a coherent phase relationship (CPR) among the axial mode groups for stabilizing an HML EDF ring laser and demonstrated that the optical spectrum becomes quite smooth with this method. In this paper, a comparative study on the pulse spectra of conventional HML and AM-HML is done and highly stable optical pulses in GHz region are reported by this method. The principle was reported elsewhere.
1995-09-05