Ghost imaging via optical parametric amplification

Quantum-correlation-enhanced weak-field detection in an optomechanical system

“…Consistent with the conclusion of the previous section, the optimal detection frequency is ω ef f . The SNR of the field detector can reach the order 10 6 , when B = 10 −13 T, and the corresponding output photon number is n = 1.7×10 6 . With the increase of field strength, the SNR is increases significantly.…”

“…Quantum technology has a very important application prospect in ultrasensitive detection, such as mass sensor [1], force sensor [2] and quantum gyroscopes [3], etc. The use of quantum correlation can provide substantial enhancements for detecting and imaging the weak signals in the presence of high levels of noise and loss [4][5][6][7][8][9]. Emission entangled photon to improve the detection signalto-noise ratio (SNR) in quantum illumination [4,5], via optical parametric amplification to enhance the quality of ghost imaging [6], intracavity squeezing to enhance the precision of a position measurement [9].…”

“…The use of quantum correlation can provide substantial enhancements for detecting and imaging the weak signals in the presence of high levels of noise and loss [4][5][6][7][8][9]. Emission entangled photon to improve the detection signalto-noise ratio (SNR) in quantum illumination [4,5], via optical parametric amplification to enhance the quality of ghost imaging [6], intracavity squeezing to enhance the precision of a position measurement [9]. These protocols show the superiority of using quantum correlation in sensitive detection.…”

Optomechanically induced transparency in a hybrid system containing two-level atomic ensemble and optical parametric amplifier

“…Since OPA is only amplified when it is pumped and does not store energy, it is widely used in fields such as optical signal amplification and mechanical cooling [14][15][16]. Li et al [14] used OPA to amplify light passing through objects. The combined effects of optical ampification and the tunable switch from slow-to-fast light can be realized by tuning the gain coefficient of the OPA [15].…”

“…Compared with ordinary lasers, OPA has the advantages of a wide operating wavelength range and low energy loss. Since OPA is only amplified when it is pumped and does not store energy, it is widely used in fields such as optical signal amplification and mechanical cooling [14][15][16]. Li et al [14] used OPA to amplify light passing through objects.…”