Fig. 1. Multi-focus laser processing for efficient fabrication of a trapezoid groove. (a) Schematic of multi-focus laser processing. (b) Simulated light intensity field of multi-focus spot. (c) 45° ...
(top) Overview of the 113-km experimental path for BDCR. (bottom) The primary apparatus at two experimental sites. The OFCs at the two terminals of the same wavelength have a slight frequency ...