Patent ID: 7519248
Filing Date: 2009-04-14
Classification: G02B,Y10S

Abstract:
1. A method, comprising: computing in a transmission grating region an interference pattern between a simulated design input optical signal and a simulated design output optical signal, the input and output optical signals each propagating through the transmission grating region as substantially unconfined optical beams; computationally deriving an arrangement for at least one diffractive element set from the computed interference pattern, so that when the diffractive element set thus arranged is formed in or on a transmission grating, each diffractive element set would route, between corresponding input and output optical ports, a corresponding diffracted portion of an input optical signal incident on and transmitted by the transmission grating; and forming the set of diffractive elements in or on the transmission grating according to the arrangement derived therefor, wherein diffractive elements of the set comprise a set of spaced-apart non-transmissive filaments.