[10a-A33-1~13] 3.7 Optical measurement, instrumentation, and sensor

12:15 PM - 12:30 PM JST(3:15 AM - 3:30 AM UTC)

[10a-A33-13] Improvement of the triple-band stabilization method for single-photon interference in quantum communication

〇Kouya Takehi¹, Tsubasa Kashimura¹, Akito Ozawa¹, Ryo Terui¹, Wataru Kokuyama³, Kanta Asakawa¹, Daisuke Akamatsu¹, Feng-Lei Hong^1,2 (1.Dep. Phys. YNU., 2.IMS YNU., 3.AIST.)

Keywords:

quantum communication,phase stabilization

Single-photon interference requires high-precision phase stabilization to prevent the degradation of interference contrast caused by phase noise in the fiber. Last year, a three-wavelength phase stabilization method, "Triple-band stabilization (TBS)," was developed to overcome the dispersion effects of "Dual-band stabilization." However, there has been insufficient discussion regarding the crosstalk caused by spontaneous Raman scattering originating from the sensing light in TBS, and the suppression of phase noise in the high Fourier frequency domain has also remained a practical challenge. We report on the residual phase fluctuations in the quantum channel resulting from TBS phase control.