To provide an optical waveguide tap which is inexpensive while enabling provision of an increased band width and/or resolution for optical applications which will newly appear.
An optical monitoring arrangement utilizes the properties of a blazed Bragg grating to redirect a portion of an optical signal out of the axial path and into a detecting device. A plurality of blazed Bragg gratings are utilized each of which has unique properties to increase the robustness of the monitor. In particular, the bandwidth of the monitor may be increased N-fold by utilizing a plurality of N gratings (assuming no overlap in wavelength between gratings). Alternatively, an improvement in resolution can be obtained by utilizing a narrower bandwidth and measuring N times the number of raw data points within that band width. A combination of increase in bandwidth and resolution may be obtained by a compromise between these two extremes. Chirped blazed gratings may also be employed.
KOEPPEN CHRISTOPHER
WIELANDY STEPHAN F
