Integrated Photonic Gyroscopes

Integrated photonic gyroscopes (IPGs) have emerged as a promising alternative to other gyroscopes, providing high sensitivity, compactness, and low power consumption, especially being more conducive to integration. In this review, we discuss recent advances in IPG technology and research, including the different types of IPGs currently being developed, such as waveguide spiral-based, ring laser gyroscope, and passive ring resonator based IPGs. We highlight the efforts dedicated to improve the stability, accuracy, and resolution of IPGs, such as using narrow-band laser diodes and using a high-stability, low-noise power supply system. Additionally, we provide an overview of the key performance measures of IPGs, including resolution, drifting, stability, noise cancellation as well as their interrelationships. Finally, we discuss challenges and future directions for the IPG research, including improving long-term stability and addressing sensitivity to shock and vibrations.