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Multi-wavelength laser phase noise elimination and frequency stabilization device and method

A frequency stabilization, phase noise technology, applied in multi-wavelength laser phase noise elimination and frequency stabilization, multi-wavelength laser phase noise elimination and frequency stabilization device, Rydberg state excitation field, to suppress thermal drift, low phase noise, The effect of cavity length stabilization

Inactive Publication Date: 2021-07-16
INNOVATION ACAD FOR PRECISION MEASUREMENT SCI & TECH CAS
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Problems solved by technology

[0006] The purpose of the present invention is to solve the problem of suppressing laser phase noise in the current Rydberg experiment, and propose and implement a device and method that can simultaneously suppress laser phase noise and long-term frequency drift

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  • Multi-wavelength laser phase noise elimination and frequency stabilization device and method

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Embodiment example

[0059] The present invention is mainly used to produce a laser light source with narrow line width, low phase noise and good long-term frequency stability. The invention will be described below by taking the 780nm and 480nm lasers required for Rb atomic Rydberg state excitation as examples.

[0060] The specific system scheme is:

[0061] The anti-reflection coatings of 780nm, 960nm and 1064nm are coated on the first cavity mirror and the second cavity mirror of the tunable Fabry-Perot cavity (11), wherein the first cavity mirror is on an adjustable piezoelectric ceramic, which can The tuning range is 0~75V, and the cavity length is 10cm, so the tunable range is 0~1.5GHz;

[0062] The main laser (12) is a 1064nm laser, which is purchased from Coherent Company. The 1064nm laser is locked on the iodine molecular spectral line through the modulation transfer spectrum method. The linewidth after locking is on the order of kHz, and its long-term frequency drift can reach 10 -12 , ...

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Abstract

The invention discloses a multi-wavelength laser phase noise elimination and frequency stabilization device and method. The invention discloses a device for simultaneously realizing high-frequency phase noise suppression of two lasers with different wavelengths and ensuring long-term stability of frequency of the two lasers with different wavelengths. A cavity length stabilizing system stabilizes a tunable Fabry-Perot cavity to a main laser; a first laser frequency stabilizing system locks a first laser to the tunable Fabry-Perot cavity, a second laser frequency stabilizing system locks a second laser to the tunable Fabry-Perot cavity; and first Fabry-Perot cavity transmission light and second Fabry-Perot cavity transmission light are input into an injection locking system so as to be subjected to power amplification. The invention also discloses a method for simultaneously realizing high-frequency phase noise suppression of two lasers with different wavelengths and ensuring long-term stability of the frequency of the two lasers with different wavelengths. By locking the Fabry-Perot cavity to the main laser with extremely small frequency drift, the cavity length change of the Fabry-Perot cavity caused by external environment temperature change and cavity absorption is reduced, and the effect of long-term stability of laser frequency is achieved.

Description

technical field [0001] The invention relates to the field of high-performance laser noise suppression, more specifically to a method for eliminating phase noise and frequency stabilization of multi-wavelength lasers, and to a device for eliminating phase noise and frequency stabilization of multi-wavelength lasers. It is suitable for the field of quantum computing and quantum simulation based on neutral atoms, and is mainly used for the Rydberg state excitation of neutral atoms. [0002] technical background [0003] Quantum computing and quantum simulation based on the dipole-dipole interaction of atomic Rydberg states have developed rapidly in recent years, among which the realization of high-fidelity coherent excitation of atoms between the ground state and the Rydberg state is the key to ensure the accuracy of the experiment Core technologies. Recent experimental results show that laser phase noise can cause severe dephasing of Rabi oscillations between the ground state ...

Claims

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Application Information

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IPC IPC(8): H01S3/13H01S3/137H01S3/139H01S3/067H01S3/08H01S3/10H01S3/105
CPCH01S3/06754H01S3/08086H01S3/10053H01S3/1301H01S3/139H01S3/137H01S3/105H01S3/1305H01S3/08059
Inventor 刘杨洋付卓许鹏何晓东王谨詹明生
Owner INNOVATION ACAD FOR PRECISION MEASUREMENT SCI & TECH CAS
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