[25a-12B-1~10] 3.7 Optical measurement, instrumentation, and sensor (formerly 3.8)

10:00 AM - 10:15 AM JST(1:00 AM - 1:15 AM UTC)

[25a-12B-4] Pseudo-vernier method for optical frequency measurement using a single comb

〇Kenichi Hitachi¹, Atsushi Ishizawa², Haruki Sanada¹, Katsuya Oguri¹ (1.NTT BRL, 2.Nihon Univ.)

Keywords:

optical frequency comb,frequency measurement

In this study, we propose a new optical frequency measurement method, pseudo-vernier method, using a single optical frequency comb. This method involves measuring the mode intervals when the laser under test is phase-locked to the N-th, (N-1)th, (N-k₂)th, (N-k₃)th, etc., modes of the optical frequency comb. By successively increasing the difference in mode numbers, k_i, it is possible to accurately determine the difference in mode numbers, and consequently derive the precise value of N. As a result, we were able to determine the optical frequency of the measured laser with an accuracy of 12 digits.