Fig. 3
From: A fully reconfigurable waveguide Bragg grating for programmable photonic signal processing
Measured reflection and transmission spectra. a Reflection and transmission spectra of the fabricated grating in the static state. b Notch wavelength shift when the bias voltages applied to the left and right sub-gratings vary synchronously. c Extinction ratio tuning while the notch wavelength is kept unchanged. d Reflection and transmission spectra when the grating is reconfigured to be a uniform grating. e Wavelength tuning of the uniform grating. f Reflection and transmission spectra when the device is reconfigured to be a uniform grating by increasing the cavity loss. g Reflection and transmission spectra when the device is reconfigured to be two independent uniform sub-gratings. h Reflection and transmission spectra when the device is reconfigured to be a chirped grating (The bias voltages and the power consumptions for different grating operation regimes are summarized in Supplementary Note 2.)
