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Improved stabilization of a 1.3 (mu)m femtosecond optical frequency comb by use of a spectrally tailored continuum from a nonlinear fiber grating

机译:通过使用来自非线性光纤光栅的频谱定制的连续体,可以改善1.3μm飞秒光学频率梳的稳定性

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We report significant enhancement (+24 dB) of the optical beat note between a 657 nm cw laser and the second-harmonic generation of the tailored continuum at 1314 nm generated with a femtosecond Cr:forsterite laser and a nonlinear fiber Bragg grating. The same continuum is used to stabilize the carrier-envelope offset frequency of the Cr:forsterite femtosecond laser and permits improved optical stabilization of the frequency comb from 1.0 to 2.2 (mu)m. Using a common optical reference at 657 nm, a relative fractional frequency instability of 2.0 X 10~(-15) is achieved between the repetition rates of Cr:forsterite and Ti:sapphire laser systems in 10 s averaging time. The fractional frequency offset between the optically stabilized frequency combs of the Cr:forsterite and Ti:sapphire lasers is +-(0.024+-6.1) X 10~(-17).
机译:我们报告说,飞秒Cr:镁橄榄石激光器和非线性光纤布拉格光栅产生的657 nm连续激光和自定义连续谱在1314 nm的第二谐波产生之间,光学拍音显着增强(+24 dB)。使用相同的连续体来稳定Cr:镁橄榄石飞秒激光器的载流子包络偏移频率,并允许将频率梳的光学稳定性提高到1.0至2.2μm。使用657 nm的公共光学参考,在平均10 s的时间内,Cr:镁橄榄石和Ti:蓝宝石激光系统的重复率之间的相对分数频率不稳定性为2.0 X 10〜(-15)。 Cr:镁橄榄石激光器和Ti:蓝宝石激光器的光学稳定频率梳之间的分数频率偏移为+-(0.024 + -6.1)X 10〜(-17)。

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