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Stabilization of passive harmonic mode locking in a fiber ring laser

Research output: Contribution to journalArticleScientificpeer-review


Original languageEnglish
Pages (from-to)184-187
Number of pages4
JournalOptics Letters
Issue number1
Publication statusE-pub ahead of print - 23 Dec 2019
Publication typeA1 Journal article-refereed


We propose the model of a harmonically mode-locked soliton fiber ring laser based on the nonlinear polarization rotation taking into account the gain depletion and recovery effects. It is shown that a specific timing jitter could arise in such lasers, since the pulses in the cavity are not strongly identical. To suppress the jitter and stabilize the harmonic mode-locking operation, a method using a small frequency shift followed by the laser radiation filtering is described. The performed numerical simulation shows that the proposed method is able to provide extremely stable harmonic mode locking in a soliton fiber ring laser.

Publication forum classification

Field of science, Statistics Finland