Tunable optical filter based on a deformable diffractive element

摘要

The tunable optical filter includes an elastic substrate (104), a diffractive element (102) in the elastic substrate, an actuator (106) for stretching the elastic substrate to control the pitch of the diffractive element, a first optical path (110) and a second optical path (112). The diffractive element optically couples the second optical path to the first optical path at an optical frequency determined by the pitch of the diffractive element. <IMAGE>The tunable optical filter includes an elastic substrate (104), a diffractive element (102) in the elastic substrate, an actuator (106) for stretching the elastic substrate to control the pitch of the diffractive element, a first optical path (110) and a second optical path (112). The diffractive element optically couples the second optical path to the first optical path at an optical frequency determined by the pitch of the diffractive element. <IMAGE>