ANNULAR OPTICAL SHIFTER AND OPTICAL SIGNAL SHIFTING METHOD

摘要

An annular optical shifter (100) and a method for controlling shifting by using the annular optical shifter. The annular optical shifter (100) comprises: a first bent straight-through waveguide (101a), connected to an input end and an output end of an optical signal and used for transmitting an optical signal input from the input end to the output end; multiple optical delay waveguide rings (103), arranged on two arms of the first bent straight-through waveguide (101a) transversely and parallelly and used for caching the optical signal; multiple pairs of optical switches (102), each pair of which being used for controlling ON and OFF of optical paths on the two arms of the first bent straight-through waveguide (101a) and two sides of the optical delay waveguide rings (103) corresponding to each pair of the optical switches (102); and a controller (105), used for shifting up or shifting down an optical signal stored in the multiple optical delay waveguide rings (103).