Fedotov Andrey, Noronen Teppo, Gumenyuk Regina, Ustimchik Vasiliy, Chamorovskii Yuri, Golant Konstantin, Odnoblyudov Maxim, Rissanen Joona, Niemi Tapio, Filippov Valery
Opt Express. 2018 Mar 19;26(6):6581-6592. doi: 10.1364/OE.26.006581.
We present a birefringent Yb-doped tapered double-clad fiber with a record core diameter of 96 µm. An impressive gain of over 38 dB was demonstrated for linearly polarized CW and pulsed sources at a wavelength of 1040 nm. For the CW regime the output power was70 W. For a mode-locked fiber laser a pulse energy of 28 µJ with 292 kW peak power was reached at an average output power of 28 W for a 1 MHz repetition rate. The tapered double-clad fiber has a high value of polarization extinction ratio at 30 dB and is capable of delivering the linearly polarized diffraction-limited beam (M = 1.09).
我们展示了一种双折射掺镱锥形双包层光纤，其纤芯直径达96 µm，创历史记录。在1040 nm波长下，对于线偏振连续波和脉冲光源，实现了超过38 dB的可观增益。在连续波模式下，输出功率为70 W。对于锁模光纤激光器，在重复频率为1 MHz、平均输出功率为28 W时，脉冲能量达到28 µJ，峰值功率为292 kW。该锥形双包层光纤的偏振消光比高达30 dB，能够输出线偏振、衍射极限光束（M = 1.09）。
