Delay-time tunable mode-locked erbium-doped fiber ring laser

A delay-time tunable, actively mode-locked erbium-doped fiber ring laser is demonstrated. The phase and the delay- time of optical pulse-train with repetition rate of about 500 MHz can be adjusted with maximum tuning range of up to 340 degree(s) (~1.9(pi) ) and nearly 1 period.

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