Demonstration of atom spin gyroscope operating with high bandwidth over 100 Hz*

We fabricate the atom spin gyroscope (ASG) using a Rb-Xe gas cell. Two DBR lasers are employed for optical pump beam and probe beam, respectively. Two DBR lasers are located on the bottom layer and connected to the printed circuit board by wire bonding. The bottom layer with the printed circuit board contain several electrical feedthroughs. A cubic glass cell containing ⁸⁷Rb, ¹²⁹Xe, ¹³¹Xe, N₂, and H₂ is mounted at the center of the physical part of the ASG. The operating temperature of the cell is 95 °C. The pattern of the B-field coils are designed to ensure magnetic field uniformity along the Rb-Xe gas cell. Optical components such as prism mirrors, wave plates, and polarization beam splitters are glued to optics layer by UV cured bond. Total volume of the physical part of the ASG is less than 100 cc including two-layeres of magnetic shield.

 Larmor frequencies of ¹²⁹Xe and ¹³¹Xe are 404 Hz and 120 Hz, respectively. Magnteic field for quantization axis is stabilized by using the sum of two Larmor frequencies. We present a scale factor, full-scale rate, and a bias instability of the ASG using Allan deviation method.