Study on 1GHz repetition rate,48.8fs Yb-doped femtosecond fiber laser
Ultrashort fiber lasers with GHz repetition rate have already demonstrated their applications in laser com-munication,advanced manufacturing,astronomical and THz detection,et al,due to their advantages of large number of pulses per unit time,wide spectral coverage and narrow pulse duration.However,the main difficulty is how to yield pul-ses with duration less than 50fs and above 1GHz repetition rate at the same time.A 1.003GHz repetition rate Yb-doped fiber laser was built with 48.8fs pulse duration by using nonlinear polarization rotation mode locking(NPR).In our ap-proach,WDM-Collimator was employed in order to shorten the length of the cavity.This fiber laser had the shortest out-put pulse duration among all reported Yb-doped fiber lasers with fundamental repetition rate above 1GHz.Finally,the la-ser was integrated into a prototype,which effectively reduced the manufacturing cost and improved the stability.The la-ser is expected to promote the industrialization and commercialization of high repetition rate fiber ultrashort pulse lasers.
ultrafast laserlaser resonatoroptical fiber amplifier and oscillatorfiber lasernonlinear opticsoptical fiber
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