Abstract: The present disclosure is directed to testing vehicles for optical devices and other semiconductor devices that have insitu sensor units for measuring localized strains, and methods for their use. In an aspect, the optical device may include a photonic integrated circuit device having several components including a laser, an optical amplifier, a waveguides, a modulator, a demodulator, and photodetectors. In another aspect, the sensor unit may include a micro-ring resonator strain sensor, an input grating coupler and an output grating coupler that are coupled to the micro-ring resonator strain sensor, for which the input grating coupler is coupled to a light source and the output grating coupler is coupled to an optical power meter. In yet another aspect, the sensor unit may include a temperature calibration unit having a heater and a temperature diode.

Abstract: Embodiments of the present disclosure may relate to a digitized grating that may include a first unit cell that has a first period and a first length, where the first period includes a first grating element width and a first space between adjacent grating elements, and where the first length includes a number of first periods. The digitized grating may further include a second unit cell that has a second period and a second length, where the second period is different than the first period and includes a second grating element width and a second space between adjacent grating elements, and where the second length includes a number of second periods.

Abstract: Embodiments of the present disclosure may relate to a digitized grating that may include a first unit cell that has a first period and a first length, where the first period includes a first grating element width and a first space between adjacent grating elements, and where the first length includes a number of first periods. The digitized grating may further include a second unit cell that has a second period and a second length, where the second period is different than the first period and includes a second grating element width and a second space between adjacent grating elements, and where the second length includes a number of second periods.