Patent ID: 9244218
Filing Date: 2016-01-26
CPC Classification: G02B,G02F,H01S

Claim Text:
1. A few-moded optical fiber device to process an input optical signal containing N modes, where N is an integer greater than or equal to 2, comprising: an input few-moded fiber enabled to receive the input signal; at least N mode converters arranged in a pre-determined order, wherein a first mode converter of the N mode converters is coupled to the input few-moded fiber, wherein each mode converter transforms one modal state of the N modal states to a different mode; a few-moded connecting fiber between each of the N mode converters; and an output few-moded fiber coupled to a last mode converter of the N mode converters to provide an output optical signal containing the N modal states, wherein each of the N modes in the optical output signal are characterized by a substantially identical transmission parameter relative to corresponding N modes of the input signal.