Dual-comb spectroscopy resolved three-degree-of-freedom sensing

Abstract

Precise and fast determination of position and orientation, which is normally achieved by distance and angle measurements, has broad applications in academia and industry. We propose a dynamic three-degree-of-freedom measurement technique based on dual-comb interferometry and a self-designed grating-corner-cube (GCC) combined sensor. Benefiting from its unique combination of diffraction and reflection characteristics, the absolute distance, pitch, and yaw of the GCC sensor can be determined simultaneously by resolving the phase spectra of the corresponding diffracted beams. We experimentally demonstrate that the method exhibits a ranging precision (Allan deviation) of 13.7 nm and an angular precision of 0.088 arcsec, alongside a 1 ms reaction time. The proposed technique is capable of precise and fast measurement of distances and two-dimensional angles over long stand-off distances. A system with such an overall performance may be potentially applied to space missions, including in tight formation-flying satellites, for spacecraft rendezvous and docking, and for antenna measurement as well as the precise manufacture of components including lithography machines and aircraft-manufacturing devices.

High Sensitivity and Full-circle Optical Rotary Sensor for Non-cooperatively Tracing Wrist Tremor with Nanoradian Resolution

“…The analyzed result is in good agreement with the experimental results of the linearity. The relative error of the proposed ORS is also better than the measured results of most optical methods from reference [1], [11]- [18], [34], [35]. Accordingly, the proposed ORS is believed to be limited by the uncertainty of R and 0  , which needs further improvement in the future research.…”

“…Furthermore, some error compensation algorithms should be applied for improving the accuracy of the ORS. auto-collimat ic method [12] grating-based interferomete ry [14] Self-mixing interferometr y [17] dual-comb interferometr y [18] Optical intensity […”

“…Normal interferometric methods need two beams or more to decouple the motions in multi-degree-of-freedom for the angle measurement [10], [11]. Some other optical methods can also measure the angle variation, including auto-collimatic method [12], total internal reflection method [13], grating-based interferometer [14], birefringence heterodyne interferometry [15], surface plasmon resonance [16], self-mixing interferometry [17], and dual-comb interferometry [18]. These methods reach a high resolution, for instance, 4.85 nrad angular displacement has been measured experimentally [10], but the sensing range of the above interferometric methods is strictly limited within several degrees.…”

High Sensitivity and Full-Circle Optical Rotary Sensor for Non-Cooperatively Tracing Wrist Tremor With Nanoradian Resolution

“…Normal interferometric methods need two beams or more to decouple the motions in multi-degree-of-freedom for the angle measurement [10,11]. Some other optical methods can also measure the angle variation , including auto-collimatic method [12], total internal reflection method [13], gratingbased interferometer [14], birefringence heterodyne interferometry [15], surface plasmon resonance [16], selfmixing interferometry [17]， and dual-comb interferometry [18]. These methods reach a high resolution, for instance, 0.001arcsecond angular displacement has been measured experimentally [10], but the sensing range of the above interferometric methods is strictly limited within several degrees.…”

High Sensitivity and Full-circle Optical Rotary Sensor for Non-cooperatively Tracing Wrist Tremor with Nanoradian Resolution

“…Normal interferometric methods need two beams or more to decouple the motions in multi-degree-of-freedom for the angle measurement [10], [11]. Some other optical methods can also measure the angle variation, including auto-collimatic method [12], total internal reflection method [13], grating-based interferometer [14], birefringence heterodyne interferometry [15], surface plasmon resonance [16], self-mixing interferometry [17], and dual-comb interferometry [18]. These methods reach a high resolution, for instance, 0.001arcsecond angular displacement has been measured experimentally [10], but the sensing range of the above interferometric methods is strictly limited within several degrees.…”