Phase locking technique of fiber lasers by using a common ring cavity and its characteristics investigation

Bing Lei; Ying Feng; Li-an Wei

doi:10.1117/12.807042

9 February 2009 Phase locking technique of fiber lasers by using a common ring cavity and its characteristics investigation

Bing Lei, Ying Feng, Li-an Wei

Author Affiliations +

Proceedings Volume 7158, 2008 International Conference on Optical Instruments and Technology: Microelectronic and Optoelectronic Devices and Integration; 71580N (2009) https://doi.org/10.1117/12.807042
Event: International Conference of Optical Instrument and Technology, 2008, Beijing, China

Abstract

Passive phase locking of multiple fiber lasers by using a common all-fiber ring cavity is proposed and demonstrated. The cavity is chiefly composed of multiple 2×2 fiber couplers, which are insets of component fiber lasers of an array. The common ring cavity not only acts as a ring filter for mode selection and stabilization of component fiber lasers, but also provides a common channel for mutual injection coupling among them. We have demonstrated efficient phase locking of multiple Erbium-doped fiber lasers with linear and ring resonators based on the common ring cavity configuration, and obvious interference patterns and stable coherent output have been observed in experiment. The power transmission and resonance properties of the ring cavity are investigated theoretically by the intensity and amplitude addition methods. The research results indicate that increasing the coupling ratio of fiber couplers can increase the coupling strength, and decreasing the loss of the common ring cavity can increase both the coupling strength and combining efficiency. Finally, the phase locking mechanism of the presented scheme is discussed, and we believe that the phase locking array forms a composite resonator on account of the common ring cavity, and the array achieves phase locking states through mutual injection coupling among component lasers.

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Bing Lei, Ying Feng, and Li-an Wei "Phase locking technique of fiber lasers by using a common ring cavity and its characteristics investigation", Proc. SPIE 7158, 2008 International Conference on Optical Instruments and Technology: Microelectronic and Optoelectronic Devices and Integration, 71580N (9 February 2009); https://doi.org/10.1117/12.807042

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KEYWORDS

Mode locking

Fiber lasers

Fiber couplers

Resonators

Optical filters

Laser resonators

Fluorescence correlation spectroscopy

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