Ultrashort pulse carrier-envelope phase detection device and method

Abstract

An ultrashort pulse carrier-envelope phase detection device comprises an ultrashort pulse laser of a fixed repetition frequency, a michelson interferometer, an optical beam splitter, a first optical filter, a first photoelectric detector, a first electrical frequency doubling unit, a second optical filter, a second photoelectric detector, a second electrical frequency doubling unit, and an electrical frequency mixing and filtering unit. The ultrashort pulse laser, the michelson interferometer and the optical beam splitter are in light path connection in order. The first optical filter, the first photoelectric detector, and the first electrical frequency doubling unit with a multiple of (p-1) are connected with a first output end of the optical beam splitter. The second optical filter, the second photoelectric detector, and the second electrical frequency doubling unit with a multiple of p are connected with a second output end of the optical beam splitter. The electrical frequency mixing and filtering unit is connected with output ends of the first electrical frequency doubling unit and the second electrical frequency doubling unit. The modes of time domain time delay and frequency domain selection are adopted, front and back pulses delayed for a certain period are subjected to coherent detection with the michelson interferometer, two different frequency windows are used for frequency domain selection, signals representing carrier-envelope phase jitter are extracted, and measurement of the ultrashort pulse carrier-envelope phase signals are achieved by electrical frequency doubling and frequency mixing processes.

Description

technical field [0001] The invention belongs to the field of photoelectric detection technology, and in particular relates to a detection device and method for an ultrashort pulse carrier envelope phase. Background technique [0002] Optical frequency comb generation and control technology is a frontier topic in the field of scientific research in recent years. By actively controlling the repetition frequency and carrier envelope phase of ultrashort pulses, a comb-shaped frequency standard with a completely stable frequency mode is obtained, which has high precision and wide range. It brings breakthrough precision improvement in precision spectrum, laser ranging, clock transmission, astronomical comparison and other applications. [0003] The repetition frequency of ultrashort pulses can be directly measured by a photodetector with a bandwidth that meets the requirements, and its control technology is currently very mature. High-precision repetition frequency control can be ...

AI Technical Summary

Problems solved by technology

Since the ultrashort pulse is affected by various nonlinear effects and the external environment in the detection process in the process of power amplification, supercontinuum broadening, and self-reference beat frequency, it is inevitable to introduce phase noise and affect the carrier envelope phase. The accuracy of the signal causes the control accuracy of the optical comb to be limited

[0004] Therefore, the existing self-referencing f-2f detection system based on ultrashort pulse power amplification, supercontinuum broadening and optical frequency doubling introduces large phase noise, complex detection methods, and limited carrier envelope phase accuracy, which limits Application of Optical Frequency Combs as High-Precision Frequency Standards for Measurements Outside the Laboratory

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