System and method for adaptively allocating channels to subchannels and maintain balance on the subchannels. The apparatus comprises a resonator which can be configured to resonate at a specified frequency, a controller for configuring the resonator, and a comparator for comparing the output of the resonator as configured by the controller. The blind spot indicator comprises an illumination source comprising at least one light emitting diode. The oscillator also includes an output coupler optically coupled to the multimode optical fiber and configured to provide a laser output at the emission wavelength. A second P-type cladding layer is formed on the first P-type cladding layer according to the nuclei sites, so that the second P-type cladding layer has a surface with a plurality of mesa hillocks. In addition, the design methods add switches to perform electrically controllable functions including frequency band selection and filter type selection.