Abstract:In this paper, we propose and simulate a pressure sensor based on two-dimensional photonic crystal with the high quality factor and sensitivity. The sensor is formed by the coupling of two photonic crystal based waveguides and one nanocavity. The photonic crystal with the triangular lattice is composed of GaAs rods. The detailed structures of the waveguides and nanocavity are optimized to achieve better quality factor and sensitivity of the sensor. For the optimized structures, the resonant wavelength of the sensor has a linear redshift as increasing the applied pressure in the range of 0 -2 GPa, and the quality factor keeps unchanged nearly. The optimized quality factor is around 1500, and the sensitivity is up to 13.9 nm/GPa.

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In order to solve the sealing problem between the two cavities of the servo actuator in harsh environment, the high pressure resistant hydraulic lock with integrated cone soft seal technology is designed by using nonmetal rolling molding and self-balanced technology of a integrated valve core. Its life and sealing effect were tested; the results showed that this new type hydraulic lock has reliable open and shut characteristic as well as reliable sealing effect. It can ensure the servomechanism is fully close anywhere. The new type design has been applied to certain model of carrier rocket.