Search Results for Gratings

FIG. 7.16 MOEM tunable grating/photonic crystal coupler tuned by (a) bending ( Errando-Herranz et al., 2017 ) or rotation ( Miniaturized MEMS Grating Spectrometer, 2021 ) and (b) stretching ( Shih et al., 2003 ; and Cui et al., 2011 ). More about this image found in MOEM tunable grating/photonic crystal coupler tuned by (a) bending ( Errand...

FIG. 7.24 (a) Two-axis MEMS mirror and grating based 1 × N wavelength router ( Stepanovsky, 2019 ). (b) A switchable wavelength add-drop filter array implemented using coupling-gap tuning of ring resonators ( Takahashi et al., 2008 ). (c) Frequency tuning of ring resonator by changing More about this image found in (a) Two-axis MEMS mirror and grating based 1 × N wavelength router ( Stepan...

FIG. 7.19 (a) Vertical pendulum tilt sensor ( Dong et al., 2005 ) with three fiber Bragg gratings attached to three cantilevers. A tilt of the pendulum leads to bending of the cantilevers depending on the direction of the tilt. This leads the attached fiber Bragg grating to strain More about this image found in (a) Vertical pendulum tilt sensor ( Dong et al., 2005 ) wi...

FIG. 7.17 (a) Homodyne-Michelson-interferometer-based position sensor. (b) Schematic of an out-of-plane actuated directional-coupler-based displacement sensor ( Liu et al., 2020b ). (c) A Fabry–Perot strain sensor ( Niewczas et al., 2003 ) with arrayed waveguide grating More about this image found in (a) Homodyne-Michelson-interferometer-based position sensor. (b) Schematic ...

FIG. 7.18 (a) Micromachined interferometric accelerometer showing the two optical beams, one from the diffraction grating and second from the mirror, which will interfere at the photodetector. (b) SiN nanobeam pair acting as “zipper” photonic crystal optomechanical cavity for accelerometry More about this image found in (a) Micromachined interferometric accelerometer showing the two optical bea...