Browsing by Author "Kuniyil, Hashir Puthiyapurayil"
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Down-conversion emission profile characterisation via camera
Kuniyil, Hashir Puthiyapurayil; Durak, Kadir (Optica Publishing Group, 2020-12-14)We present a method to improve the brightness and collection efficiency of the spontaneous parametric down-conversion source by monitoring the mode shape using camera and correcting it with collection optics. -
Effect of phase and spatial distinguishability of photon pairs on the entanglement fidelity
Kuniyil, Hashir Puthiyapurayil; Durak, Kadir (SPIE, 2021)Polarization entanglement based cryptography uses the photon pairs generated in a spontaneous parametric down-conversion process and guarantees the security through the violation of Bell's inequality. Certain experimental ... -
Efficient coupling of down-converted photon pairs into single mode fiber
Kuniyil, Hashir Puthiyapurayil; Durak, Kadir (Elsevier, 2021-08-15)We present the analysis of the down-conversion emission profile from a critically phase-matched type-I nonlinear crystal. The emission profile of the down-conversion modes shows asymmetry in cylindrical coordinate system ... -
Noise-tolerant object detection and ranging using quantum correlations
Kuniyil, Hashir Puthiyapurayil; Özel, Helin; Yılmaz, H.; Durak, Kadir (IOP Publishing, 2022-10)Imaging, detection and ranging of objects in the presence of significant background noise is a fundamental challenge in optical sensing. Overcoming the limitations imposed in conventional methods, quantum light sources ... -
Object ranging and sensing by temporal cross-correlation measurement
Kuniyil, Hashir Puthiyapurayil; Jam, Naser Chamani; Durak, Kadir (SPIE, 2020)We present a novel method to measure the range of an object in a lab setting. This is realised by utilizing the phase insensitive cross-correlation analysis of the probe and reference photons generated in a spontaneous ...
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