Here we theoretically analyzed the impact of the laser uniformity on the magnetic sensitivity with the negatively charged nitrogen-vacancy (NV− ) centers in diamond. The maximum slope of the optically detected magnetic resonance signal was simulated under Gaussian laser excitation. The signal to noise ratio (SNR) with different integral radius was calculated. Results show that the SNR can be improved by selectively integrating the fluorescence within the optimal integral radius. The SNR can be improved by 16.4% under conditions that the average excitation rate is 69.6 kHz and Rabi frequency is 250 kHz. This method will benefit the sensitivity improvement of NV-based sensors with CCD detection.
This paper presents the design of a power amplifier (PA) used in a magnetic measurement system based on nitrogenvacancy (NV) centers in diamond. The core of the PA is CGH40035F from CREE, which can realize a larger output power and higher power added efficiencies (PAE) over wide frequency ranges. Through extensive source-pull and load-pull, the best load impedance and source impedance at the maximum output power are found, and the input and output impedance matching are achieved by the method of hybrid matching, which uses microstrip lines and capacitors. The simulation results show that the PA has a small-signal gain greater than 16 dB at 2.87 GHz, and the input return loss S11 lower than - 17.7 dB. After calculation, the gain fluctuation in the 2.74-3.00 GHz is only 0.7 dB. Moreover, the output power of the 1 dB compression point P1dB of the PA is 40.5 dBm with above 40% PAE, and the large-signal power gain is greater than 15 dB. The above data proves that the designed PA has extremely high performance and it is suitable for the manipulation of NV centers, which contributes to the integration of the magnetic measurement system.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.