A wave against - propagative spectrography

摘要

The present invention relates to a spectrograph (11) comprising a waveguide (10) provided with two access (10a, 10b, 12), an injection means of two guided waves against - propagating by each of said access so as to create a spatial interference pattern within said guide, a detection means (19, 20, 14, 16) of the energy of the evanescent wave of the field is guided from the interference of said waves against - propagating.