Rapid-scan acousto-optical delay line with 34 kHz scan rate and 15 attosecond precision

Sub-20-Attosecond Timing Jitter Mode-Locked Fiber Lasers

We demonstrate 14.3-attosecond timing jitter [integrated from 10 kHz to 94 MHz offset frequency] optical pulse trains from 188-MHz repetition-rate mode-locked Yb-fiber lasers. In order to minimize the timing jitter, we shorten the non-gain fiber length to shorten the pulsewidth and reduce excessive higher-order nonlinearity and nonlinear chirp in the fiber laser. The measured jitter spectrum is limited by the amplified spontaneous emission limited quantum noise in the 100 kHz - 1 MHz offset frequency range, while it was limited by the relative intensity noise-converted jitter in the lower offs…

43 W, 1.55 μm and 12.5 W, 3.1 μm dual-beam, sub-10 cycle, 100 kHz optical parametric chirped pulse amplifier

We present a 100 kHz optical parametric chirped pulse amplifier (OPCPA) developed for strong-field attosecond physics and soft-X-ray transient absorption experiments. The system relies on noncollinear potassium titanyl arsenate (KTA) booster OPCPAs and is pumped by a 240 W, 1.1 ps Yb:YAG Innoslab chirped pulse laser amplifier. Two optically synchronized infrared output beams are simultaneously available: a 430 μJ, 51 fs, carrier-envelope phase (CEP) stable beam at 1.55 μm and an angular-dispersion-compensated, 125 μJ, 73 fs beam at 3.1 μm.

通过锁定到optical fiber延迟线实现超低频噪声laser

Ultra low frequency noise laser by locking to an optical fiber delay line

报道了利用大臂不平衡的全光纤迈克耳孙干涉仪对掺铒光纤分布反馈激光器进行稳频的实验研究。该干涉仪使用一个1公里的SMF-28光纤线轴和声光调制器，允许外差检测。对于1 Hz ~ 10 kHz的傅立叶频率，频率噪声功率谱密度降低了40 dB以上，对应于整个范围内远低于1 Hz^2/Hz的水平。在1 kHz时可达到10^{-2} Hz^2/Hz。在40 Hz和30 kHz之间，频率噪声被示出为与通过Pound-Drever-Hall锁定到高精细度Fabry-Perot腔获得的频率噪声相当。因此，锁定到光纤延迟线可以代表用于短期线宽减小的腔稳定的可靠、简单和紧凑的替代方案。

Transferring the attoclock technique to velocity map imaging

Attosecond angular streaking measurements have revealed deep insights into the timing of tunnel ionization processes of atoms in intense laser fields. So far experiments of this type have been performed only with a cold-target recoil-ion momentum spectrometer (COLTRIMS). Here, we present a way to apply attosecond angular streaking experiments to a velocity map imaging spectrometer (VMIS) with few-cycle pulses at a repetition rate of 10 kHz and a high ionization yield per pulse. Three-dimensional photoelectron momentum distributions from strong-field ionization of helium with an elliptically po…

PHz Electronic Device Design and Simulation for Waveguide-Integrated Carrier-Envelope Phase Detection

Carrier-envelope phase (CEP) detection of ultrashort optical pulses and low-energy waveform field sampling have recently been demonstrated using direct time-domain methods that exploit optical-field photoemission from plasmonic nanoantennas. These devices make for compact and integratable solid-state detectors operating at optical frequency that work in ambient conditions and require minute pulse energies (picojoule-level). Applications include frequency-comb stabilization, visible to near-infrared time-domain spectroscopy, compact tools for attosecond science and metrology and, due to the hig…