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Conventional optical tweezers handle non-absorptive (transparent) particles, and the force exerted to the particle is proportional to the intensity of the trapping laser. Recently, some works on selective trapping/manipulation of absorptive particles based on resonance effects have been reported. Some years ago, our research group found that the use of an ultra-short pulsed laser as a trapping light...
An optical frequency comb locked to a stable optical reference can serve as a source for microwave signals having very low close-to-carrier phase noise. This has recently been confirmed by comparing two independent systems, yielding an absolute phase noise of −104 dBc/Hz at 1 Hz offset from a 10 GHz carrier. The corresponding timing jitter is 760 attoseconds, integrated from 1 Hz to 1 MHz. Here we...
We show a photonic oscillator providing 10 GHz microwaves having L(f)=−104 dBc/Hz at 1 Hz offset and fractional instability <8×10−16 at 1 s. These values are verified by operation and comparison of two independent systems.
An optically-stabilized femtosecond laser optical frequency comb can serve as a source of optical and microwave waveforms with absolute integrated timing jitter on the scale of a few femtoseconds. This ultralow jitter is due to the stability of a passive optical cavity, which is the frequency reference for the system. We will present recent results in the generation of low phase noise 10 GHz signals...
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