5 research outputs found
Long-term Stabilization of Fiber Laser Using Phase-locking Technique with Ultra-low Phase Noise and Phase Drift
We review the conventional phase-locking technique in the long-term
stabilization of the mode-locked fiber laser and investigate the phase noise
limitation of the conventional technique. To break the limitation, we propose
an improved phase-locking technique with an optic-microwave phase detector in
achieving the ultra-low phase noise and phase drift. The mechanism and the
theoretical model of the novel phase-locking technique are also discussed. The
long-term stabilization experiments demonstrate that the improved technique can
achieve the long-term stabilization for the MLFL with ultra-low phase noise and
phase drift. The excellent locking performance of the improved phase-locking
technique implies that this technique can be used to stabilize the mode-locked
fiber laser with the highly stable H-master or optical clock without stability
loss
Low power chip-scale CPT atomic clock with new microwave frequency modulation technique
we present a new chip-scale atomic clock with low power consumption based on a new microwave frequency modulation technique achieved with the voltage-control oscillator (VCO) and the new servo circuit designed for frequency-locking the microwave to an Rb-85 coherent population trap (CPT) atomic resonator. The microwave modulation is achieved by directly injecting triangular current signal into the charge-pump of the phase-locked loop. The system volume is less than 50 cm(3) and the total power consumption of the whole system is less than 600mW. Experiments on frequency stability are performed under laboratory environment, and the results show that the frequency stability (overlapping Allan deviation) of the 10 MHz output signal reaches 2x10(-10) at average time of 1 s, and 5x10(-11) at average time of 1000 s. These results reveal that our atomic clock is practical for most applications that require compact, high stable and low-power consumption frequency sources.http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000346295600112&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701Engineering, Electrical & ElectronicPhysics, AppliedTelecommunicationsCPCI-S(ISTP)