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Updated: Aug 22, 2025

Construction and Characterization of External Cavity Diode Lasers for Atomic Physics

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Published on: April 24, 2014

Intra-cavity frequency-doubled VECSEL system for narrow linewidth Rydberg EIT spectroscopy.

Joshua C Hill, William K Holland, Paul D Kunz

|November 11, 2022

Summary

This summary is machine-generated.

High-power visible lasers using vertical external-cavity surface-emitting lasers (VECSELs) enable MHz-level precision spectroscopy. This breakthrough advances quantum information and sensing technologies with narrow-linewidth light sources.

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Area of Science:

Quantum optics
Laser physics
Spectroscopy

Background:

Growing demand for high-power, narrow-linewidth visible and UV light sources for quantum research.
Vertical external-cavity surface-emitting lasers (VECSELs) with intra-cavity frequency conversion offer a promising solution.

Purpose of the Study:

To demonstrate Rydberg-state spectroscopy using electromagnetically induced transparency (EIT) with a frequency-doubled VECSEL.
To characterize the frequency stability and linewidth of the developed VECSEL system.

Main Methods:

Utilized a VECSEL with intra-cavity frequency conversion to generate 475 nm light.
Performed Rydberg-state spectroscopy via EIT, achieving 3.5 MHz FWHM resolution.
Characterized laser frequency stability using delayed self-heterodyne technique and comparison with an ECDL.

Main Results:

Achieved 690 mW output power at 475 nm, enabling large Rabi frequencies and high signal-to-noise ratios.
Measured a Lorentzian linewidth of 5.3(2) kHz and a total linewidth of 23(2) kHz for the pre-doubled light.
Demonstrated MHz-level precision spectroscopy capabilities.

Conclusions:

Intra-cavity frequency-doubled VECSELs are suitable for precision spectroscopy at the MHz level.
These VECSELs represent a promising tool for current and future quantum technologies.
The developed system facilitates high-resolution measurements in quantum information and sensing.