A novel demodulation method for transmission using nitrogen–vacancy-based solid-state quantum sensor

Abstract

Diamond based quantum sensing is a fast-emerging field with both scientific and technological significance. The nitrogen-vacancy (NV) center, a crystal defect in diamond, has become a unique object for microwave sensing applications due to its excellent stability, long spin coherence time and optical properties at ambient condition. In this work, we use diamond NV center as atomic receiver to demodulate On-Off Keying (OOK) signal transmitted in broad frequency range (2-14GHz in a portable benchtop setup). We proposed a unique algorithm of voltage discrimination and demonstrated audio signal transceiving with fidelity above 99%. This diamond receiver is attached to the end of a tapered fiber, having all optic nature, which will find important applications in data transmission tasks under extreme conditions such as strong electromagnetic interference, high temperatures and high corrosion.

Design of compact integrated diamond nitrogen–vacancy center quantum probe

“…[22] Figure 1(b) gives the outline of key elements of experimental setup. The designed scanning magnetic imaging system comprises two primary modules: [23] an optical module and a control module. A 532-nm pulsed laser, mirrors, objective lens, an avalanche photon diode (APD) and other optical components are incorporated into an optical module, which is used to complete the transmission and conversion of optical signals.…”

Surface H‐field mapping of a microwave limiter chip based on quantum diamond probe

“…The energy level diagram of the diamond NV center 15,16 is shown in Figure 1B, where the ground state spin triplet state at room temperature has a zero-field splitting of 2870 MHz (i.e., splitting away from the microwave frequencies of m s = 0 and m s = ±1), while the excited state zerofield splitting is 1420 MHz. Among them, the zero-field splitting of the ground state has the advantages of long coherence time, fast manipulation of microwave quantum states, optical initialization, and good spin detection performance of quantum bits at room temperature.…”

Micron-sized fiber diamond probe for quantum precision measurement of microwave magnetic field

“…[9] Diamond's non-magnetic nature minimizes MW magnetic field disturbance, enhancing measurement accuracy. Advancements in quantum state control, [10][11][12] high-resolution imaging, [13,14] communication, [15] and optimization of pulse trains [16] and magnetic field phases [17] mark a steady evolution in NV center technology.…”