公开(公告)号：US20230243700A1

公开(公告)日：2023-08-03

申请号：US17963254

申请日：2022-10-11

Applicant: Harbin Institute of Technology

Inventor： Ruitao Yang ,  Pengcheng Hu ,  Jiubin Tan

IPC: G01J3/28 ,  G01J3/12 ,  G01J3/02

CPC classification number: G01J3/28 ,  G01J3/12 ,  G01J3/0218

Abstract: The present disclosure provides an approximation-free and iteration-free method for spectral analysis of an intracavity electro-optic modulation type optical frequency comb, a device and a medium. The method includes: calculating a residual phase delay of a single propagation of laser in a resonant cavity, analyzing outgoing transmission characteristics of a light source of the intracavity electro-optic modulation type optical frequency comb, accumulating laser electric field intensities corresponding to all cyclic propagation times n to obtain an outgoing laser electric field intensity E, obtaining a new approximate-free outgoing laser electric field intensity E′ of the intracavity electro-optic modulation type optical frequency comb, obtaining an outgoing laser electric field intensity Ek′ of kth-order comb teeth, calculating an outgoing laser light intensity Ik of the kth-order comb teeth and accurately analyzing a spectrum of the intracavity electro-optic modulation type optical frequency comb, determining a working state according to a simulated spectral envelope curve, and guiding the subsequent optimization design and debugging. The method for the spectral analysis of the optical frequency comb is higher in accuracy without approximation and faster in speed without iteration, and can analyze the spectrum of the intracavity electro-optic modulation type optical frequency comb according to any known working mode.

公开(公告)号：US12199407B1

公开(公告)日：2025-01-14

申请号：US18751413

申请日：2024-06-24

Applicant: Harbin Institute of Technology

Inventor： Yisi Dong ,  Wenwen Li ,  Wenrui Luo ,  Chen Zhang ,  Jinran Zhang ,  Pengcheng Hu ,  Ruitao Yang

IPC: H01S5/0687 ,  H01S3/13 ,  H01S5/026 ,  H01S5/06 ,  H01S5/068

Abstract: A frequency stabilization method and system for tunable light sources based on characteristic curve reconstruction are provided, which relate the field of frequency stabilization technologies of modulation absorption spectrum. A set of frequency stabilization control method and system based on internal modulation absorption spectroscopy of light source is constructed, and a high-precision laser frequency stabilization method under large-amplitude and high-bandwidth frequency modulation based on frequency discrimination curve reconstruction is proposed to solve a problem that it is difficult for micro-probe laser interferometry measurement benchmark to balance large-amplitude and high-bandwidth frequency modulation, and high-precision frequency stabilization, resulting in that it is difficult to obtain high relative accuracy measurement under large-range measurement. Under the large-amplitude and high-bandwidth frequency modulation, a distortion model of the frequency discrimination curve and a distortion correction model are constructed, which is used for feedback adjustment of phase compensation and reconstructing the frequency discrimination curve.