Gigahertz self-referenceable frequency comb from a semiconductor disk laser.

Gigahertz self-referenceable frequency comb from a semiconductor disk laser.
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来自半导体盘激光器的千兆赫自参考频率梳。

DOI:
10.1364/oe.22.016445
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发表时间:
2014
期刊:
影响因子:
3.8
通讯作者:
U. Keller
U. Keller
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
C. Zaugg;A. Klenner;M. Mangold;A. S. Mayer;S. Link;F. Emaury;M. Golling;E. Gini;C. Saraceno;B. Tilma;U. Keller

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我们提出了一个1.75 GHz的自参考频率梳从垂直外腔面发射激光器(VECSEL)被动锁模与半导体可饱和吸收镜(SESAM)。VECSEL提供231 fs脉冲,平均功率为100 mW,并针对稳定可靠的工作进行了优化。光谱以1038 nm为中心,几乎是变换限制的,半高全宽(FWHM)带宽为5.5 nm。脉冲首先使用后向泵浦掺Yb双包层大模面积(LMA)光纤放大到5.5 W的平均功率,然后使用无源LMA光纤和传输光栅压缩到85 fs,平均功率为2.2 W。随后,我们将脉冲发射到高度非线性的光子晶体光纤(PCF)中,并产生了一个相干的倍频程跨越超连续谱(SC)。然后,我们使用标准的f到2f干涉仪检测载波包络偏移(CEO)频率(f(CEO))拍音。f(CEO)在100 kHz分辨率带宽下的信噪比为17 dB,半高宽为100 MHz。据我们所知,这是第一份关于从半导体激光器中检测f(CEO)的报告,为基于锁模半导体圆盘激光器的完全稳定的紧凑型频率梳打开了大门。
We present a 1.75-GHz self-referenceable frequency comb from a vertical external-cavity surface-emitting laser (VECSEL) passively modelocked with a semiconductor saturable absorber mirror (SESAM). The VECSEL delivers 231-fs pulses with an average power of 100 mW and is optimized for stable and reliable operation. The optical spectrum was centered around 1038 nm and nearly transform-limited with a full width half maximum (FWHM) bandwidth of 5.5 nm. The pulses were first amplified to an average power of 5.5 W using a backward-pumped Yb-doped double-clad large mode area (LMA) fiber and then compressed to 85 fs with 2.2 W of average power with a passive LMA fiber and transmission gratings. Subsequently, we launched the pulses into a highly nonlinear photonic crystal fiber (PCF) and generated a coherent octave-spanning supercontinuum (SC). We then detected the carrier-envelope offset (CEO) frequency (f(CEO)) beat note using a standard f-to-2f-interferometer. The f(CEO) exhibits a signal-to-noise ratio of 17 dB in a 100-kHz resolution bandwidth and a FWHM of ≈10 MHz. To our knowledge, this is the first report on the detection of the f(CEO) from a semiconductor laser, opening the door to fully stabilized compact frequency combs based on modelocked semiconductor disk lasers.
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