Wang Aimin, Yang Hongyu, Zhang Zhigang
School of Electronics Engineering and Computer Science, Peking University, Beijing, China.
Opt Express. 2011 Dec 5;19(25):25412-7. doi: 10.1364/OE.19.025412.
We demonstrate 503MHz fundamental high repetition rate operation in a ring cavity passively mode-locked Yb:fiber laser incorporating a novel wavelength-division-multiplexing collimator and a piece of all-solid photonic bandgap fiber. The Yb doped fiber was directly fabricated as one fiber pigtail into the functional collimator, greatly shortening the cavity length and facilitating the splicing operation. A 5cm long photonic bandgap fiber with abnormal dispersion at the lasing wavelength (centered at 1030nm) decreases the net dispersion for shorter output pulses. The spectral bandwidth of the pulse was 34nm. The direct output pulse was measured to be 156fs and the dechirped pulse was about 76fs. With this innovative Yb:fiber pigtailed WDM collimator, the ring cavity laser has the potential to work at a repetition rate up to GHz.
我们展示了一种环形腔被动锁模掺镱光纤激光器，其采用了新型波分复用准直器和一段全固态光子带隙光纤，实现了503MHz的高重复频率基频运转。掺镱光纤被直接制作成一个光纤尾纤接入功能性准直器，极大地缩短了腔长并便于熔接操作。一段5厘米长的光子带隙光纤在激光波长（中心波长为1030nm）处具有反常色散，可降低输出短脉冲的净色散。脉冲的光谱带宽为34nm。测量得到直接输出脉冲为156fs，啁啾脉冲约为76fs。借助这种创新的掺镱光纤尾纤式波分复用准直器，环形腔激光器有潜力工作在高达GHz的重复频率。
