Patent ID: 9097580
Filing Date: 2015-08-04
Classification: G01J,G02B,H04B,H04J

Abstract:
1. A tunable multiport optical filter comprising: a linear array of optical ports extending along an x-direction, with adjacent optical ports separated by an integral number of pitches along the x-direction; an optical output port positioned collinearly with the optical ports and separated therefrom by a non-integer number of pitches; a light dispersion element positioned to receive an optical signal from one of the linear array of optical ports and to disperse the received optical signal along a y-direction that is not parallel to the x-direction, the received optical signal dispersed into a plurality of separate wavelength components; and a reflective beam steering element positioned to receive the plurality of separate wavelength components dispersed by the light dispersion element and to reflect the dispersed optical signal back through the light dispersion element, the reflective beam steering element controllable such that any one wavelength component of the dispersed optical signal from any optical port of the linear array of optical ports can be redirected through the light dispersion element to couple to the optical output port.