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Published June 12, 2017 | Published
Journal Article Open

Pulse-spacing manipulation in a passively mode-locked multipulse fiber laser

Abstract

Passively mode-locked fiber lasers have been intensively applied in various research fields. However, the passive mode-locking typically operates in free-running regime, which easily produces messy multiple pulses due to the fruitful nonlinear effects involved in optical fibers. Actively controlling those disordered pulses in a passively mode-locked laser is of great interest but rarely studied. In this work, we experimentally investigate a flexible pulse-spacing manipulation in the passively mode-locked multipulse fiber laser by both intracavity and extracavity methods. A tuning range of pulse spacing up to 1.5 ns is achieved. More importantly, continuous pulse-spacing modulation is successfully demonstrated through external optical injection. It is anticipated that the results can contribute to the understanding of laser nonlinear dynamics and pursuing the optimal performance of passively mode-locked fiber lasers for practical applications.

Additional Information

© 2017 Optical Society of America. Received 3 Apr 2017; revised 19 May 2017; accepted 20 May 2017; published 1 Jun 2017. Funding: Research Grants Council of the Hong Kong Special Administrative Region, China (Project Nos. HKU 17205215, HKU 17208414, and CityU T42-103/16-N) and National Natural Science Foundation of China (N_HKU712/16); Innovation and Technology Fund (GHP/050/14GD); and University Development Fund of HKU.

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August 19, 2023
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