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We report on a novel electro-optic modulator that acts on the carrier-envelope-offset frequency of a femtosecond pulsed laser with negligible cross-talk to the position of the optical carrier modes. The fast response on the nanosecond time scale allows to stabilize the carrier-envelope-offset frequency with a bandwidth in excess of 1 MHz while not perturbing a potential independent stabilization of...
Optical frequency combs in space bear the prospect of dramatically improving satellite navigation and they may pave the pathway for various space applications like satellite formation flights, global satellite navigation, earth observation, and satellite-based fundamental tests of physical constants [1]. Here we report on a precision ranging system based on a dual-comb architecture aiming for fast...
We investigated the transfer of a 194 THz optical frequency along a 1840 km fiber link. The fractional frequency instability expressed as the modified Allan deviation is 2.7 × 10−15 at 1 s with 4 × 10−19 after 100 s. The transferred frequency shows no systematic offset within an uncertainty of 3 × 10−19. Analyzing the underlying noise structure reveals a τ−2 response in the modified Allan deviation,...
The use of ultra-precise optical clocks in space will allow for a range of new applications in the fields of fundamental physics (tests of Einstein's theory of General Relativity, time and frequency metrology by means of the comparison of distant terrestrial clocks), geophysics (mapping of the gravitational potential of Earth), and astronomy (providing local oscillators for radio ranging and interferometry...
Optical frequency transfer via a 1840 km fiber link has been investigated. Twenty fiber amplifiers and two fiber Brillouin amplifiers are needed to compensate for 420 dB of loss. Active noise compensation reduces the instability to 2.7 × 10−15 at 1 s with 4 × 10−19 after 100 s and an accuracy of a few parts in 1019.
Low-phase-noise and stable microwave signals are of prime importance in a variety of scientific and technological fields, such as, for example, atomic frequency standards1,2, radar and remote sensing, and very long baseline interferometry. The combination of ultra-stable lasers 3 and low noise optical frequency division by use a femtosecond laser presents a possibility to realize extremely low phase...
We demonstrate frequency comb generation via four-wave-mixing in crystalline MgF2 whispering-gallery mode resonators. More than 800 comb lines spaced by 43 GHz are observed. Second order autocorrelation is performed for time-domain characterization.
The relative and absolute phases of femtosecond 1.03-μm pump, 1.55-μm signal and 3.09-μm idler pulses are stabilized paving the way for the generation of optimized driver-waveforms for higher-order-harmonic generation and electron impulsive momentum transfer.
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