Meeting Banner
Abstract #4033

Zero-Dead-Time Earth’s Field NMR Using Two-Photon Excitation

Victor Han1 and Chunlei Liu1,2
1Electrical Engineering and Computer Sciences, University of California, Berkeley, Berkeley, CA, United States, 2Helen Wills Neuroscience Institute, University of California, Berkeley, Berkeley, CA, United States

Two-photon excitation allows for excitation at half of the Larmor frequency. In Earth’s magnetic field, this corresponds to a Larmor frequency of about 2 kHz and an excitation frequency of about 1 kHz. By transmitting at 1 kHz and receiving at 2 kHz, we could transmit and receive at the same time by using filters to protect the receiver. While some harmonic distortion prevented us from fully separating the transmitted from the received signal during excitation, the always connected and unsaturated receive circuitry allowed us to eliminate receiver dead time, which can be quite long at low frequencies.

This abstract and the presentation materials are available to members only; a login is required.

Join Here