Tunable laser scaling device and instrument

CN122385152APending Publication Date: 2026-07-14NANTONG ZHONGKE XUNGUANG TECHNOLOGY CO LTD

Patent Information

Authority / Receiving Office: CN · China
Patent Type: Applications(China)
Current Assignee / Owner: NANTONG ZHONGKE XUNGUANG TECHNOLOGY CO LTD
Filing Date: 2026-05-15
Publication Date: 2026-07-14

AI Technical Summary

Technical Problem

Existing tunable laser calibration technology suffers from slow calibration speed, low accuracy, and high environmental sensitivity, making it difficult to meet the industrial needs of optical communication and high-precision fiber optic sensing.

Method used

By employing an all-fiber Michelson interferometer combined with piezoelectric ceramic (PZT) modulation technology, optical path modulation is achieved by winding optical fiber onto the surface of piezoelectric ceramic. Combined with wavelength division multiplexing and phase demodulation, calibration with sub-picometer accuracy and kilohertz scanning rate is achieved.

Benefits of technology

It achieves sub-picometer level calibration resolution within microsecond-level scanning time, significantly improving calibration speed, reducing equipment size and cost, enhancing environmental robustness, and is suitable for real-time self-calibration of systems such as fiber Bragg grating demodulators.

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Abstract

The application discloses a tunable laser calibrating device and instrument, which comprises a light source module for generating a coupling light beam containing reference light and signal light to be measured; a full-fiber Michelson interferometer for dividing the coupling light beam into two light beams, one of which enters a fixed reference arm and generates a reference light waveform, and the other of which enters a dynamic scanning arm and generates a signal light waveform; a detection and collection module for performing wavelength physical separation on reflected light signals returned by the full-fiber Michelson interferometer to obtain interference light of the reference light and interference light of the signal light, and collecting interference waveforms of the reference light and the signal light respectively; and a control and calculation module for synchronously driving a piezoelectric ceramic to perform radial deformation and synchronously driving a tunable laser to perform wavelength stepping, performing phase demodulation on the interference waveform of the signal light by taking the interference waveform of the reference light as a spatial domain scale, extracting wavelength information, and generating a wavelength-driving parameter lookup table according to the wavelength information.

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