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Supercontinuum generation in dispersion engineered silicon nitride waveguides is used to perform frequency comb metrology by measuring the relative stability of two cavity-referenced optical clock lasers at 3.8×10−15 at τ = 2 seconds.
Using aluminum-nitride photonic-chip waveguides, we generate optical frequency comb supercontinuum spanning 500 to 4000 nm. We detect and stabilize the offset frequency of the compact laser comb oscillator directly using the waveguide output.
We show two high power 100 fs frequency combs can be coupled to the same enhancement cavity for performing time-resolved measurements of optical nonlinearities and for simplifying dual-comb spectroscopy in the XUV.
The early Tudor laureate John Skelton (c. 1460–1529) wrote original Latin verses, previously unpublished, in the margins of a manuscript copy (Cambridge, Corpus Christi College, Ms. 432) of La chronique d’un ménestrel de Reims (c. 1260). Despite the peculiarities of the Reims Minstrel’s Chronique, which may be a parody of prose historical romance, Skelton used it for teaching Henry (1491–1547), later...
The letters that the English king Richard II sent to various other heads of state after his ‘Revenge’ parliament in 1397, in which he vaunted his ascendant power, are to be attributed to the authorship of the protonotary William Ferriby, a participant in the deposition proceedings against Richard and author of a literary lament for him after the deposition, who was executed as a rebel by Henry IV...
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