助攻計畫-為太空光梳光鐘用之量子控制光梳光譜(1/3)

The mutual calibration between time standards on satellites in space and on theground play an important role in the fundamental science researches and cuttingedge applications, like satellite-based scientific researches, global satellitenavigation, earth observation, and satellite formation flying, which leads to a newterminology called “space-borne metrology. In particular, the microgravity insatellite offers the best circumstance for defining the time standard since it is freefrom gravitational red-shift. Comb laser would be definitely a mainstay in theaforementioned optical clockwork by which the frequency accuracy of opticalclock is able to be transferred to microwave regime for the time-standarddissemination, which was the main achievement leading to the Nobel Laureate in2005 for the invention of comb laser. Up to date, however, satellite-born comblaser still does not exist, due to its complexity, delicacy, and high powerconsumption, even though has successfully operated a comb laser on a rocketfor ~ 5 minutes. In this proposal, we plan to quantum control the comb laser-atominteraction for laser stabilization. The cesium-rubidium atoms will be sustained inone 6-cm cesium-rubidium glass cell to lock a comb laser with a powerconsumption of below 50 watts where the world advanced fiber comb laserconsumed only 5-watts power. The significant size reduction of comb laser notonly benefits for low-power consumption but also for the robust structure, which issuitable for being allocated into the Taiwan cubesat satellite (立方衛星)[ ] which iscost effective and versatile. The success of this project might help Taiwan playinga role in the international meeting of 6G communication protocols [ ], since thesatellites in space will be the "routers" of the 6G era responding for all the datatransportation. Such a big-data transmission demands a high-precision clock as atime sequence keeper in space.